-- Allow maintenance background worker to restart itself if it crashes. Previously if the main background worker process exited for any reason, the only way to restart it was to restart the whole postgresql instance. Now it will try to restart itself every 10 minutes. A warning will be issued into the logs if this event occurs. (Github Issue #180).
    -- NOTE: You will have to restart the PostgreSQL cluster to load the new library with the auto-restart option.
-- Remove internal version checking function and use simpler comparison method using integer based version number (Pull Request #183).
-- Apply fixes from running plpgsql_check (https://github.com/okbob/plpgsql_check/)


DROP FUNCTION IF EXISTS @extschema@.check_version(text);

CREATE OR REPLACE FUNCTION create_parent(
    p_parent_table text
    , p_control text
    , p_type text
    , p_interval text
    , p_constraint_cols text[] DEFAULT NULL
    , p_premake int DEFAULT 4
    , p_automatic_maintenance text DEFAULT 'on'
    , p_start_partition text DEFAULT NULL
    , p_inherit_fk boolean DEFAULT true
    , p_epoch text DEFAULT 'none'
    , p_upsert text DEFAULT ''
    , p_trigger_return_null boolean DEFAULT true
    , p_jobmon boolean DEFAULT true
    , p_debug boolean DEFAULT false)
RETURNS boolean
    LANGUAGE plpgsql SECURITY DEFINER
    AS $$
DECLARE

ex_context                      text;
ex_detail                       text;
ex_hint                         text;
ex_message                      text;
v_partattrs                     smallint[];
v_base_timestamp                timestamptz;
v_count                         int := 1;
v_control_type                  text;
v_control_exact_type            text;
v_datetime_string               text;
v_higher_control_type           text;
v_higher_parent_control         text;
v_higher_parent_schema          text := split_part(p_parent_table, '.', 1);
v_higher_parent_table           text := split_part(p_parent_table, '.', 2);
v_id_interval                   bigint;
v_job_id                        bigint;
v_jobmon_schema                 text;
v_last_partition_created        boolean;
v_max                           bigint;
v_native_sub_control            text;
v_notnull                       boolean;
v_new_search_path               text := '@extschema@,pg_temp';
v_old_search_path               text;
v_parent_partition_id           bigint;
v_parent_partition_timestamp    timestamptz;
v_parent_schema                 text;
v_parent_tablename              text;
v_part_col                      text;
v_part_type                     text;
v_partition_time                timestamptz;
v_partition_time_array          timestamptz[];
v_partition_id_array            bigint[];
v_partstrat                     char;
v_row                           record;
v_sql                           text;
v_start_time                    timestamptz;
v_starting_partition_id         bigint;
v_step_id                       bigint;
v_step_overflow_id              bigint;
v_sub_parent                    text;
v_success                       boolean := false;
v_time_interval                 interval;
v_top_datetime_string           text;
v_top_parent_schema             text := split_part(p_parent_table, '.', 1);
v_top_parent_table              text := split_part(p_parent_table, '.', 2);

BEGIN
/*
 * Function to turn a table into the parent of a partition set
 */

IF position('.' in p_parent_table) = 0  THEN
    RAISE EXCEPTION 'Parent table must be schema qualified';
END IF;

IF p_upsert <> '' THEN
    IF current_setting('server_version_num')::int < 90500 THEN
        RAISE EXCEPTION 'INSERT ... ON CONFLICT (UPSERT) feature is only supported in PostgreSQL 9.5 and later';
    END IF;
    IF p_type = 'native' THEN
        RAISE EXCEPTION 'Native partitioning does not currently support upsert. Use pg_partman''s partitioning methods instead if this is required';
    END IF;
END IF;

SELECT n.nspname, c.relname INTO v_parent_schema, v_parent_tablename
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = split_part(p_parent_table, '.', 1)::name
AND c.relname = split_part(p_parent_table, '.', 2)::name;
    IF v_parent_tablename IS NULL THEN
        RAISE EXCEPTION 'Unable to find given parent table in system catalogs. Please create parent table first: %', p_parent_table;
    END IF;

SELECT attnotnull INTO v_notnull
FROM pg_catalog.pg_attribute a
JOIN pg_catalog.pg_class c ON a.attrelid = c.oid
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE c.relname = v_parent_tablename::name
AND n.nspname = v_parent_schema::name
AND a.attname = p_control::name;
    IF p_type <> 'native' AND (v_notnull = false OR v_notnull IS NULL) THEN
        RAISE EXCEPTION 'Control column given (%) for parent table (%) does not exist or must be set to NOT NULL', p_control, p_parent_table;
    END IF;

SELECT general_type, exact_type INTO v_control_type, v_control_exact_type
FROM @extschema@.check_control_type(v_parent_schema, v_parent_tablename, p_control);

IF (p_epoch <> 'none' AND v_control_type <> 'id') THEN
    RAISE EXCEPTION 'p_epoch can only be used with an integer based control column and does not work for native partitioning';
END IF;


IF NOT @extschema@.check_partition_type(p_type) THEN
    RAISE EXCEPTION '% is not a valid partitioning type for pg_partman', p_type;
END IF;

IF p_type = 'native' THEN

    IF current_setting('server_version_num')::int < 100000 THEN
        RAISE EXCEPTION 'Native partitioning only available in PostgreSQL versions 10.0+';
    END IF;
    -- Check if given parent table has been already set up as a partitioned table and is ranged
    SELECT p.partstrat, partattrs INTO v_partstrat, v_partattrs
    FROM pg_catalog.pg_partitioned_table p
    JOIN pg_catalog.pg_class c ON p.partrelid = c.oid
    JOIN pg_namespace n ON c.relnamespace = n.oid
    WHERE n.nspname = v_parent_schema::name
    AND c.relname = v_parent_tablename::name;

    IF v_partstrat <> 'r' OR v_partstrat IS NULL THEN
        RAISE EXCEPTION 'When using native partitioning, you must have created the given parent table as ranged (not list) partitioned already. Ex: CREATE TABLE ... PARITIONED BY RANGE ...)';
    END IF;

    IF array_length(v_partattrs, 1) > 1 THEN
        RAISE NOTICE 'pg_partman only supports single column native partitioning at this time. Found % columns in given parent definition.', array_length(v_partattrs, 1);
    END IF;

    SELECT a.attname, t.typname
    INTO v_part_col, v_part_type
    FROM pg_attribute a
    JOIN pg_class c ON a.attrelid = c.oid
    JOIN pg_namespace n ON c.relnamespace = n.oid
    JOIN pg_type t ON a.atttypid = t.oid
    WHERE n.nspname = v_parent_schema::name
    AND c.relname = v_parent_tablename::name
    AND attnum IN (SELECT unnest(partattrs) FROM pg_partitioned_table p WHERE a.attrelid = p.partrelid);

    IF p_control <> v_part_col OR v_control_exact_type <> v_part_type THEN
        RAISE EXCEPTION 'Control column and type given in arguments (%, %) does not match the control column and type of the given native partition set (%, %)', p_control, v_control_exact_type, v_part_col, v_part_type;
    END IF;

    -- Check that control column is a usable type for pg_partman.
    IF v_control_type NOT IN ('time', 'id') THEN
        RAISE EXCEPTION 'Only date/time or integer types are allowed for the control column with native partitioning.';
    END IF;

ELSE

    IF current_setting('server_version_num')::int >= 100000 THEN
        SELECT p.partstrat INTO v_partstrat
        FROM pg_catalog.pg_partitioned_table p
        JOIN pg_catalog.pg_class c ON p.partrelid = c.oid
        JOIN pg_namespace n ON c.relnamespace = n.oid
        WHERE n.nspname = v_parent_schema::name
        AND c.relname = v_parent_tablename::name;
    END IF;

    IF v_partstrat IS NOT NULL THEN
        RAISE EXCEPTION 'Given parent table has been set up with native partitioning therefore cannot be used with pg_partman''s other partitioning types. Either recreate table non-native or set the type argument to ''native''';
    END IF;

END IF;

SELECT current_setting('search_path') INTO v_old_search_path;
IF p_jobmon THEN
    SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon'::name AND e.extnamespace = n.oid;
    IF v_jobmon_schema IS NOT NULL THEN
        v_new_search_path := '@extschema@,'||v_jobmon_schema||',pg_temp';
    END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');

EXECUTE format('LOCK TABLE %I.%I IN ACCESS EXCLUSIVE MODE', v_parent_schema, v_parent_tablename);

IF v_jobmon_schema IS NOT NULL THEN
    v_job_id := add_job(format('PARTMAN SETUP PARENT: %s', p_parent_table));
    v_step_id := add_step(v_job_id, format('Creating initial partitions on new parent table: %s', p_parent_table));
END IF;

-- If this parent table has siblings that are also partitioned (subpartitions), ensure this parent gets added to part_config_sub table so future maintenance will subpartition it
-- Just doing in a loop to avoid having to assign a bunch of variables (should only run once, if at all; constraint should enforce only one value.)
FOR v_row IN
    WITH parent_table AS (
        SELECT h.inhparent AS parent_oid
        FROM pg_catalog.pg_inherits h
        JOIN pg_catalog.pg_class c ON h.inhrelid = c.oid
        JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
        WHERE c.relname = v_parent_tablename::name
        AND n.nspname = v_parent_schema::name
    ), sibling_children AS (
        SELECT i.inhrelid::regclass::text AS tablename
        FROM pg_inherits i
        JOIN parent_table p ON i.inhparent = p.parent_oid
    )
    SELECT DISTINCT sub_partition_type
        , sub_control
        , sub_partition_interval
        , sub_constraint_cols
        , sub_premake
        , sub_inherit_fk
        , sub_retention
        , sub_retention_schema
        , sub_retention_keep_table
        , sub_retention_keep_index
        , sub_automatic_maintenance
        , sub_epoch
        , sub_optimize_trigger
        , sub_optimize_constraint
        , sub_infinite_time_partitions
        , sub_jobmon
        , sub_trigger_exception_handling
        , sub_upsert
        , sub_trigger_return_null
    FROM @extschema@.part_config_sub a
    JOIN sibling_children b on a.sub_parent = b.tablename LIMIT 1
LOOP
    INSERT INTO @extschema@.part_config_sub (
        sub_parent
        , sub_partition_type
        , sub_control
        , sub_partition_interval
        , sub_constraint_cols
        , sub_premake
        , sub_inherit_fk
        , sub_retention
        , sub_retention_schema
        , sub_retention_keep_table
        , sub_retention_keep_index
        , sub_automatic_maintenance
        , sub_epoch
        , sub_optimize_trigger
        , sub_optimize_constraint
        , sub_infinite_time_partitions
        , sub_jobmon
        , sub_trigger_exception_handling
        , sub_upsert
        , sub_trigger_return_null)
    VALUES (
        p_parent_table
        , v_row.sub_partition_type
        , v_row.sub_control
        , v_row.sub_partition_interval
        , v_row.sub_constraint_cols
        , v_row.sub_premake
        , v_row.sub_inherit_fk
        , v_row.sub_retention
        , v_row.sub_retention_schema
        , v_row.sub_retention_keep_table
        , v_row.sub_retention_keep_index
        , v_row.sub_automatic_maintenance
        , v_row.sub_epoch
        , v_row.sub_optimize_trigger
        , v_row.sub_optimize_constraint
        , v_row.sub_infinite_time_partitions
        , v_row.sub_jobmon
        , v_row.sub_trigger_exception_handling
        , v_row.sub_upsert
        , v_row.sub_trigger_return_null);
END LOOP;

IF v_control_type = 'time' OR (v_control_type = 'id' AND p_epoch <> 'none') THEN

    CASE
        WHEN p_interval = 'yearly' THEN
            v_time_interval := '1 year';
        WHEN p_interval = 'quarterly' THEN
            v_time_interval := '3 months';
        WHEN p_interval = 'monthly' THEN
            v_time_interval := '1 month';
        WHEN p_interval  = 'weekly' THEN
            v_time_interval := '1 week';
        WHEN p_interval = 'daily' THEN
            v_time_interval := '1 day';
        WHEN p_interval = 'hourly' THEN
            v_time_interval := '1 hour';
        WHEN p_interval = 'half-hour' THEN
            v_time_interval := '30 mins';
        WHEN p_interval = 'quarter-hour' THEN
            v_time_interval := '15 mins';
        ELSE
            IF p_type <> 'native' THEN
                -- Reset for use as part_config type value below
                p_type = 'time-custom';
            END IF;
            v_time_interval := p_interval::interval;
            IF v_time_interval < '1 second'::interval THEN
                RAISE EXCEPTION 'Partitioning interval must be 1 second or greater';
            END IF;
    END CASE;

   -- First partition is either the min premake or p_start_partition
    v_start_time := COALESCE(p_start_partition::timestamptz, CURRENT_TIMESTAMP - (v_time_interval * p_premake));

    IF v_time_interval >= '1 year' THEN
        v_base_timestamp := date_trunc('year', v_start_time);
        IF v_time_interval >= '10 years' THEN
            v_base_timestamp := date_trunc('decade', v_start_time);
            IF v_time_interval >= '100 years' THEN
                v_base_timestamp := date_trunc('century', v_start_time);
                IF v_time_interval >= '1000 years' THEN
                    v_base_timestamp := date_trunc('millennium', v_start_time);
                END IF; -- 1000
            END IF; -- 100
        END IF; -- 10
    END IF; -- 1

    v_datetime_string := 'YYYY';
    IF v_time_interval < '1 year' THEN
        IF p_interval = 'quarterly' THEN
            v_base_timestamp := date_trunc('quarter', v_start_time);
            v_datetime_string = 'YYYY"q"Q';
        ELSE
            v_base_timestamp := date_trunc('month', v_start_time);
            v_datetime_string := v_datetime_string || '_MM';
        END IF;
        IF v_time_interval < '1 month' THEN
            IF p_interval = 'weekly' THEN
                v_base_timestamp := date_trunc('week', v_start_time);
                v_datetime_string := 'IYYY"w"IW';
            ELSE
                v_base_timestamp := date_trunc('day', v_start_time);
                v_datetime_string := v_datetime_string || '_DD';
            END IF;
            IF v_time_interval < '1 day' THEN
                v_base_timestamp := date_trunc('hour', v_start_time);
                v_datetime_string := v_datetime_string || '_HH24MI';
                IF v_time_interval < '1 minute' THEN
                    v_base_timestamp := date_trunc('minute', v_start_time);
                    v_datetime_string := v_datetime_string || 'SS';
                END IF; -- minute
            END IF; -- day
        END IF; -- month
    END IF; -- year

    v_partition_time_array := array_append(v_partition_time_array, v_base_timestamp);
    LOOP
        -- If current loop value is less than or equal to the value of the max premake, add time to array.
        IF (v_base_timestamp + (v_time_interval * v_count)) < (CURRENT_TIMESTAMP + (v_time_interval * p_premake)) THEN
            BEGIN
                v_partition_time := (v_base_timestamp + (v_time_interval * v_count))::timestamptz;
                v_partition_time_array := array_append(v_partition_time_array, v_partition_time);
            EXCEPTION WHEN datetime_field_overflow THEN
                RAISE WARNING 'Attempted partition time interval is outside PostgreSQL''s supported time range.
                    Child partition creation after time % skipped', v_partition_time;
                v_step_overflow_id := add_step(v_job_id, 'Attempted partition time interval is outside PostgreSQL''s supported time range.');
                PERFORM update_step(v_step_overflow_id, 'CRITICAL', 'Child partition creation after time '||v_partition_time||' skipped');
                CONTINUE;
            END;
        ELSE
            EXIT; -- all needed partitions added to array. Exit the loop.
        END IF;
        v_count := v_count + 1;
    END LOOP;

    INSERT INTO @extschema@.part_config (
        parent_table
        , partition_type
        , partition_interval
        , epoch
        , control
        , premake
        , constraint_cols
        , datetime_string
        , automatic_maintenance
        , inherit_fk
        , jobmon
        , upsert
        , trigger_return_null)
    VALUES (
        p_parent_table
        , p_type
        , v_time_interval
        , p_epoch
        , p_control
        , p_premake
        , p_constraint_cols
        , v_datetime_string
        , p_automatic_maintenance
        , p_inherit_fk
        , p_jobmon
        , p_upsert
        , p_trigger_return_null);

    v_last_partition_created := @extschema@.create_partition_time(p_parent_table, v_partition_time_array, false);

    IF v_last_partition_created = false THEN
        -- This can happen with subpartitioning when future or past partitions prevent child creation because they're out of range of the parent
        -- First see if this parent is a subpartition managed by pg_partman
        WITH top_oid AS (
            SELECT i.inhparent AS top_parent_oid
            FROM pg_catalog.pg_inherits i
            JOIN pg_catalog.pg_class c ON c.oid = i.inhrelid
            JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
            WHERE c.relname = v_parent_tablename::name
            AND n.nspname = v_parent_schema::name
        ) SELECT n.nspname, c.relname
        INTO v_top_parent_schema, v_top_parent_table
        FROM pg_catalog.pg_class c
        JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
        JOIN top_oid t ON c.oid = t.top_parent_oid
        JOIN @extschema@.part_config p ON p.parent_table = n.nspname||'.'||c.relname;

        IF v_top_parent_table IS NOT NULL THEN
            -- If so create the lowest possible partition that is within the boundary of the parent
            SELECT child_start_time INTO v_parent_partition_timestamp FROM @extschema@.show_partition_info(p_parent_table, p_parent_table := v_top_parent_schema||'.'||v_top_parent_table);
            IF v_base_timestamp >= v_parent_partition_timestamp THEN
                WHILE v_base_timestamp >= v_parent_partition_timestamp LOOP
                    v_base_timestamp := v_base_timestamp - v_time_interval;
                END LOOP;
                v_base_timestamp := v_base_timestamp + v_time_interval; -- add one back since while loop set it one lower than is needed
            ELSIF v_base_timestamp < v_parent_partition_timestamp THEN
                WHILE v_base_timestamp < v_parent_partition_timestamp LOOP
                    v_base_timestamp := v_base_timestamp + v_time_interval;
                END LOOP;
                -- Don't need to remove one since new starting time will fit in top parent interval
            END IF;
            v_partition_time_array := NULL;
            v_partition_time_array := array_append(v_partition_time_array, v_base_timestamp);
            v_last_partition_created := @extschema@.create_partition_time(p_parent_table, v_partition_time_array, false);
        ELSE
            RAISE WARNING 'No child tables created. Check that all child tables did not already exist and may not have been part of partition set. Given parent has still been configured with pg_partman, but may not have expected children. Please review schema and config to confirm things are ok.';

            IF v_jobmon_schema IS NOT NULL THEN
                PERFORM update_step(v_step_id, 'OK', 'Done');
                IF v_step_overflow_id IS NOT NULL THEN
                    PERFORM fail_job(v_job_id);
                ELSE
                    PERFORM close_job(v_job_id);
                END IF;
            END IF;

            EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');

            RETURN v_success;
        END IF;
    END IF; -- End v_last_partition IF

    IF v_jobmon_schema IS NOT NULL THEN
        PERFORM update_step(v_step_id, 'OK', format('Time partitions premade: %s', p_premake));
    END IF;

END IF;

IF v_control_type = 'id' AND p_epoch = 'none' THEN
    v_id_interval := p_interval::bigint;
    IF p_type <> 'native' AND v_id_interval < 10 THEN
        RAISE EXCEPTION 'Interval for serial, non-native partitioning must be greater than or equal to 10';
    END IF;

    -- Check if parent table is a subpartition of an already existing id partition set managed by pg_partman.
    WHILE v_higher_parent_table IS NOT NULL LOOP -- initially set in DECLARE
        WITH top_oid AS (
            SELECT i.inhparent AS top_parent_oid
            FROM pg_catalog.pg_inherits i
            JOIN pg_catalog.pg_class c ON c.oid = i.inhrelid
            JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
            WHERE n.nspname = v_higher_parent_schema::name
            AND c.relname = v_higher_parent_table::name
        ) SELECT n.nspname, c.relname, p.control
        INTO v_higher_parent_schema, v_higher_parent_table, v_higher_parent_control
        FROM pg_catalog.pg_class c
        JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
        JOIN top_oid t ON c.oid = t.top_parent_oid
        JOIN @extschema@.part_config p ON p.parent_table = n.nspname||'.'||c.relname;

        IF v_higher_parent_table IS NOT NULL THEN
            SELECT general_type INTO v_higher_control_type
            FROM @extschema@.check_control_type(v_higher_parent_schema, v_higher_parent_table, v_higher_parent_control);
            IF v_higher_control_type <> 'id' THEN
                -- The parent above the p_parent_table parameter is not partitioned by ID
                --   so don't check for max values in parents that aren't partitioned by ID.
                -- This avoids missing child tables in subpartition sets that have differing ID data
                EXIT;
            END IF;
            -- v_top_parent initially set in DECLARE
            v_top_parent_schema := v_higher_parent_schema;
            v_top_parent_table := v_higher_parent_table;
        END IF;
    END LOOP;

    -- If custom start partition is set, use that.
    -- If custom start is not set and there is already data, start partitioning with the highest current value and ensure it's grabbed from highest top parent table
    IF p_start_partition IS NOT NULL THEN
        v_max := p_start_partition::bigint;
    ELSE
        v_sql := format('SELECT COALESCE(max(%I)::bigint, 0) FROM %I.%I LIMIT 1'
                    , p_control
                    , v_top_parent_schema
                    , v_top_parent_table);
        EXECUTE v_sql INTO v_max;
    END IF;

    v_starting_partition_id := v_max - (v_max % v_id_interval);
    FOR i IN 0..p_premake LOOP
        -- Only make previous partitions if ID value is less than the starting value and positive (and custom start partition wasn't set)
        IF p_start_partition IS NULL AND
            (v_starting_partition_id - (v_id_interval*i)) > 0 AND
            (v_starting_partition_id - (v_id_interval*i)) < v_starting_partition_id
        THEN
            v_partition_id_array = array_append(v_partition_id_array, (v_starting_partition_id - v_id_interval*i));
        END IF;
        v_partition_id_array = array_append(v_partition_id_array, (v_id_interval*i) + v_starting_partition_id);
    END LOOP;

    INSERT INTO @extschema@.part_config (
        parent_table
        , partition_type
        , partition_interval
        , control
        , premake
        , constraint_cols
        , automatic_maintenance
        , inherit_fk
        , jobmon
        , upsert
        , trigger_return_null)
    VALUES (
        p_parent_table
        , p_type
        , v_id_interval
        , p_control
        , p_premake
        , p_constraint_cols
        , p_automatic_maintenance
        , p_inherit_fk
        , p_jobmon
        , p_upsert
        , p_trigger_return_null);

    v_last_partition_created := @extschema@.create_partition_id(p_parent_table, v_partition_id_array, false);
    IF v_last_partition_created = false THEN
        -- This can happen with subpartitioning when future or past partitions prevent child creation because they're out of range of the parent
        -- See if it's actually a subpartition of a parent id partition
        WITH top_oid AS (
            SELECT i.inhparent AS top_parent_oid
            FROM pg_catalog.pg_inherits i
            JOIN pg_catalog.pg_class c ON c.oid = i.inhrelid
            JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
            WHERE c.relname = v_parent_tablename::name
            AND n.nspname = v_parent_schema::name
        ) SELECT n.nspname||'.'||c.relname
        INTO v_top_parent_table
        FROM pg_catalog.pg_class c
        JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
        JOIN top_oid t ON c.oid = t.top_parent_oid
        JOIN @extschema@.part_config p ON p.parent_table = n.nspname||'.'||c.relname;

        IF v_top_parent_table IS NOT NULL THEN
            -- Create the lowest possible partition that is within the boundary of the parent
             SELECT child_start_id INTO v_parent_partition_id FROM @extschema@.show_partition_info(p_parent_table, p_parent_table := v_top_parent_table);
            IF v_starting_partition_id >= v_parent_partition_id THEN
                WHILE v_starting_partition_id >= v_parent_partition_id LOOP
                    v_starting_partition_id := v_starting_partition_id - v_id_interval;
                END LOOP;
                v_starting_partition_id := v_starting_partition_id + v_id_interval; -- add one back since while loop set it one lower than is needed
            ELSIF v_starting_partition_id < v_parent_partition_id THEN
                WHILE v_starting_partition_id < v_parent_partition_id LOOP
                    v_starting_partition_id := v_starting_partition_id + v_id_interval;
                END LOOP;
                -- Don't need to remove one since new starting id will fit in top parent interval
            END IF;
            v_partition_id_array = NULL;
            v_partition_id_array = array_append(v_partition_id_array, v_starting_partition_id);
            v_last_partition_created := @extschema@.create_partition_id(p_parent_table, v_partition_id_array, false);
        ELSE
            -- Currently unknown edge case if code gets here
            RAISE WARNING 'No child tables created. Check that all child tables did not already exist and may not have been part of partition set. Given parent has still been configured with pg_partman, but may not have expected children. Please review schema and config to confirm things are ok.';
            IF v_jobmon_schema IS NOT NULL THEN
                PERFORM update_step(v_step_id, 'OK', 'Done');
                IF v_step_overflow_id IS NOT NULL THEN
                    PERFORM fail_job(v_job_id);
                ELSE
                    PERFORM close_job(v_job_id);
                END IF;
            END IF;

            EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');

            RETURN v_success;
        END IF;
    END IF; -- End v_last_partition_created IF

END IF; -- End IF id

IF p_type <> 'native' THEN
    IF v_jobmon_schema IS NOT NULL  THEN
        v_step_id := add_step(v_job_id, 'Creating partition function');
    END IF;
    IF v_control_type = 'time' OR (v_control_type = 'id' AND p_epoch <> 'none') THEN
        PERFORM @extschema@.create_function_time(p_parent_table, v_job_id);
        IF v_jobmon_schema IS NOT NULL THEN
            PERFORM update_step(v_step_id, 'OK', 'Time function created');
        END IF;
    ELSIF v_control_type = 'id' THEN
        PERFORM @extschema@.create_function_id(p_parent_table, v_job_id);
        IF v_jobmon_schema IS NOT NULL THEN
            PERFORM update_step(v_step_id, 'OK', 'ID function created');
        END IF;
    END IF;

    IF v_jobmon_schema IS NOT NULL THEN
        v_step_id := add_step(v_job_id, 'Creating partition trigger');
    END IF;
    PERFORM @extschema@.create_trigger(p_parent_table);
END IF; -- end native check


IF v_jobmon_schema IS NOT NULL THEN
    PERFORM update_step(v_step_id, 'OK', 'Done');
    IF v_step_overflow_id IS NOT NULL THEN
        PERFORM fail_job(v_job_id);
    ELSE
        PERFORM close_job(v_job_id);
    END IF;
END IF;

EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');

v_success := true;

RETURN v_success;

EXCEPTION
    WHEN OTHERS THEN
        GET STACKED DIAGNOSTICS ex_message = MESSAGE_TEXT,
                                ex_context = PG_EXCEPTION_CONTEXT,
                                ex_detail = PG_EXCEPTION_DETAIL,
                                ex_hint = PG_EXCEPTION_HINT;
        IF v_jobmon_schema IS NOT NULL THEN
            IF v_job_id IS NULL THEN
                EXECUTE format('SELECT %I.add_job(''PARTMAN CREATE PARENT: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
                EXECUTE format('SELECT %I.add_step(%s, ''Partition creation for table '||p_parent_table||' failed'')', v_jobmon_schema, v_job_id, p_parent_table) INTO v_step_id;
            ELSIF v_step_id IS NULL THEN
                EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before first step logged'')', v_jobmon_schema, v_job_id) INTO v_step_id;
            END IF;
            EXECUTE format('SELECT %I.update_step(%s, ''CRITICAL'', %L)', v_jobmon_schema, v_step_id, 'ERROR: '||coalesce(SQLERRM,'unknown'));
            EXECUTE format('SELECT %I.fail_job(%s)', v_jobmon_schema, v_job_id);
        END IF;
        RAISE EXCEPTION '%
CONTEXT: %
DETAIL: %
HINT: %', ex_message, ex_context, ex_detail, ex_hint;
END
$$;


CREATE OR REPLACE FUNCTION create_sub_parent(
    p_top_parent text
    , p_control text
    , p_type text
    , p_interval text
    , p_native_check text DEFAULT NULL
    , p_constraint_cols text[] DEFAULT NULL
    , p_premake int DEFAULT 4
    , p_start_partition text DEFAULT NULL
    , p_inherit_fk boolean DEFAULT true
    , p_epoch text DEFAULT 'none'
    , p_upsert text DEFAULT ''
    , p_trigger_return_null boolean DEFAULT true
    , p_jobmon boolean DEFAULT true
    , p_debug boolean DEFAULT false)
RETURNS boolean
    LANGUAGE plpgsql SECURITY DEFINER
    AS $$
DECLARE

v_child_interval        interval;
v_child_start_id        bigint;
v_child_start_time      timestamptz;
v_control               text;
v_control_parent_type   text;
v_control_sub_type      text;
v_last_partition        text;
v_new_search_path       text := '@extschema@,pg_temp';
v_old_search_path       text;
v_parent_epoch          text;
v_parent_interval       text;
v_parent_relkind        char;
v_parent_schema         text;
v_parent_tablename      text;
v_parent_type           text;
v_part_col              text;
v_partition_id_array    bigint[];
v_partition_time_array  timestamptz[];
v_relkind               char;
v_recreate_child        boolean := false;
v_row                   record;
v_row_last_part         record;
v_run_maint             boolean;
v_sql                   text;
v_success               boolean := false;
v_top_type              text;

BEGIN
/*
 * Create a partition set that is a subpartition of an already existing partition set.
 * Given the parent table of any current partition set, it will turn all existing children into parent tables of their own partition sets
 *      using the configuration options given as parameters to this function.
 * Uses another config table that allows for turning all future child partitions into a new parent automatically.
 */

SELECT n.nspname, c.relname, c.relkind INTO v_parent_schema, v_parent_tablename, v_parent_relkind
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = split_part(p_top_parent, '.', 1)::name
AND c.relname = split_part(p_top_parent, '.', 2)::name;
    IF v_parent_tablename IS NULL THEN
        RAISE EXCEPTION 'Unable to find given parent table in system catalogs. Please create parent table first: %', p_top_parent;
    END IF;

IF NOT @extschema@.check_partition_type(p_type) THEN
    RAISE EXCEPTION '% is not a valid partitioning type', p_type;
END IF;

IF v_parent_relkind = 'p' AND p_type <> 'native' THEN
    RAISE EXCEPTION 'Cannot create a non-native sub-partition of a native parent table. All levels of a sub-partition set must be either all native or all non-native';
END IF;

SELECT partition_type, partition_interval, control, automatic_maintenance, epoch
INTO v_parent_type, v_parent_interval, v_control, v_run_maint, v_parent_epoch
FROM @extschema@.part_config
WHERE parent_table = p_top_parent;
IF v_parent_type IS NULL THEN
    RAISE EXCEPTION 'Cannot subpartition a table that is not managed by pg_partman already. Given top parent table not found in @extschema@.part_config: %', p_top_parent;
END IF;

IF p_type = 'native' AND (lower(p_native_check) <> 'yes' OR p_native_check IS NULL) THEN
    RAISE EXCEPTION 'The sub-partitioning of a natively partitioned table is a DESTRUCTIVE process unless all child tables are already natively subpartitioned. All child tables, and therefore ALL DATA, may be destroyed since the parent table must be declared as partitioned on first creation and cannot be altered later. See docs for more info. Set p_native_check parameter to "yes" if you are sure this is ok.';
END IF;

IF p_upsert <> '' THEN
    IF current_setting('server_version_num')::int < 90500 THEN
        RAISE EXCEPTION 'INSERT ... ON CONFLICT (UPSERT) feature is only supported in PostgreSQL 9.5 and later';
    END IF;
    IF p_type = 'native' THEN
        RAISE EXCEPTION 'Native partitioning does not currently support upsert. Use pg_partman''s partitioning methods instead if this is required';
    END IF;
END IF;

SELECT general_type INTO v_control_parent_type FROM @extschema@.check_control_type(v_parent_schema, v_parent_tablename, v_control);

SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');

-- Add the given parameters to the part_config_sub table first in case create_partition_* functions are called below
INSERT INTO @extschema@.part_config_sub (
    sub_parent
    , sub_control
    , sub_partition_type
    , sub_partition_interval
    , sub_constraint_cols
    , sub_premake
    , sub_inherit_fk
    , sub_automatic_maintenance
    , sub_epoch
    , sub_upsert
    , sub_jobmon
    , sub_trigger_return_null)
VALUES (
    p_top_parent
    , p_control
    , p_type
    , p_interval
    , p_constraint_cols
    , p_premake
    , p_inherit_fk
    , 'on'
    , p_epoch
    , p_upsert
    , p_jobmon
    , p_trigger_return_null);

FOR v_row IN
    -- Loop through all current children to turn them into partitioned tables
    SELECT partition_schemaname AS child_schema, partition_tablename AS child_tablename FROM @extschema@.show_partitions(p_top_parent)
LOOP

    SELECT general_type INTO v_control_sub_type FROM @extschema@.check_control_type(v_row.child_schema, v_row.child_tablename, p_control);

    SELECT c.relkind INTO v_relkind
    FROM pg_catalog.pg_class c
    JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
    WHERE n.nspname = v_row.child_schema
    AND c.relname = v_row.child_tablename;

    -- If both parent and sub-parent are the same partition type (time/id), ensure boundaries of sub-parent are within parent
    IF (v_control_parent_type = 'time' AND v_control_sub_type = 'time') OR
       (v_control_parent_type = 'id' AND v_parent_epoch <> 'none' AND v_control_sub_type = 'id' AND p_epoch <> 'none') THEN
        CASE
            WHEN p_interval = 'yearly' THEN
                v_child_interval := '1 year';
            WHEN p_interval = 'quarterly' THEN
                v_child_interval := '3 months';
            WHEN p_interval = 'monthly' THEN
                v_child_interval := '1 month';
            WHEN p_interval  = 'weekly' THEN
                v_child_interval := '1 week';
            WHEN p_interval = 'daily' THEN
                v_child_interval := '1 day';
            WHEN p_interval = 'hourly' THEN
                v_child_interval := '1 hour';
            WHEN p_interval = 'half-hour' THEN
                v_child_interval := '30 mins';
            WHEN p_interval = 'quarter-hour' THEN
                v_child_interval := '15 mins';
            ELSE
                v_child_interval := p_interval::interval;
                IF v_child_interval < '1 second'::interval THEN
                    RAISE EXCEPTION 'Partitioning interval must be 1 second or greater';
                END IF;
        END CASE;

        IF v_child_interval >= v_parent_interval::interval THEN
            EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
            RAISE EXCEPTION 'Sub-partition interval cannot be greater than or equal to the given parent interval';
        END IF;
        IF v_child_interval = '1 week' AND v_parent_interval::interval > '1 week'::interval THEN
            EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
            RAISE EXCEPTION 'Due to conflicting data boundaries between ISO weeks and any larger interval of time, pg_partman cannot support a sub-partition interval of weekly';
        END IF;

    ELSIF v_control_parent_type = 'id' AND v_control_sub_type = 'id' THEN
        IF p_interval::bigint >= v_parent_interval::bigint THEN
            EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
            RAISE EXCEPTION 'Sub-partition interval cannot be greater than or equal to the given parent interval';
        END IF;
    END IF;

    IF p_type = 'native' THEN
        IF v_relkind <> 'p' THEN
            -- Not natively partitioned already. Drop it and recreate as such.
            RAISE WARNING 'Child table % is not natively partitioned. Dropping and recreating with native partitioning'
                            , v_row.child_schema||'.'||v_row.child_tablename;
            SELECT child_start_time, child_start_id INTO v_child_start_time, v_child_start_id
            FROM @extschema@.show_partition_info(v_row.child_schema||'.'||v_row.child_tablename
                                                    , v_parent_interval
                                                    , p_top_parent);
            EXECUTE format('DROP TABLE %I.%I', v_row.child_schema, v_row.child_tablename);
            v_recreate_child := true;

            IF v_child_start_id IS NOT NULL THEN
                v_partition_id_array[0] := v_child_start_id;
                PERFORM @extschema@.create_partition_id(p_top_parent, v_partition_id_array, true);
            ELSIF v_child_start_time IS NOT NULL THEN
                v_partition_time_array[0] := v_child_start_time;
                PERFORM @extschema@.create_partition_time(p_top_parent, v_partition_time_array, true);
            END IF;
        ELSE
            SELECT a.attname
            INTO v_part_col
            FROM pg_attribute a
            JOIN pg_class c ON a.attrelid = c.oid
            JOIN pg_namespace n ON c.relnamespace = n.oid
            WHERE n.nspname = v_row.child_schema::name
            AND c.relname = v_row.child_tablename::name
            AND attnum IN (SELECT unnest(partattrs) FROM pg_partitioned_table p WHERE a.attrelid = p.partrelid);

            IF p_control <> v_part_col THEN
                RAISE EXCEPTION 'Attempted to natively sub-partition an existing table that has the partition column (%) defined differently than the control column given (%)', v_part_col, p_control;
            ELSE -- Child table is already natively subpartitioned properly. Skip the rest.
                CONTINUE;
            END IF;
        END IF; -- end 'p' relkind check

    END IF; -- end native check

    IF v_recreate_child = false THEN
    -- Always call create_parent() if child table wasn't recreated above.
    -- If it was, the create_partition_*() functions called above also call create_parent if any of the tables
    --  it creates are in the part_config_sub table. Since it was inserted there above,
    --  it should call it appropriately
        v_sql := format('SELECT @extschema@.create_parent(
                 p_parent_table := %L
                , p_control := %L
                , p_type := %L
                , p_interval := %L
                , p_constraint_cols := %L
                , p_premake := %L
                , p_automatic_maintenance := %L
                , p_start_partition := %L
                , p_inherit_fk := %L
                , p_epoch := %L
                , p_upsert := %L
                , p_trigger_return_null := %L
                , p_jobmon := %L
                , p_debug := %L )'
            , v_row.child_schema||'.'||v_row.child_tablename
            , p_control
            , p_type
            , p_interval
            , p_constraint_cols
            , p_premake
            , 'on'
            , p_start_partition
            , p_inherit_fk
            , p_epoch
            , p_upsert
            , p_trigger_return_null
            , p_jobmon
            , p_debug);
        EXECUTE v_sql;
    END IF; -- end recreate check

END LOOP;

v_success := true;

EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');

RETURN v_success;

END
$$;


CREATE OR REPLACE FUNCTION check_name_length (p_object_name text, p_suffix text DEFAULT NULL, p_table_partition boolean DEFAULT FALSE) RETURNS text
    LANGUAGE plpgsql IMMUTABLE SECURITY DEFINER
    AS $$
DECLARE
    v_new_length    int;
    v_new_name      text;
BEGIN
/*
 * Truncate the name of the given object if it is greater than the postgres default max (63 characters).
 * Also appends given suffix and schema if given and truncates the name so that the entire suffix will fit.
 * Returns original name (with suffix if given) if it doesn't require truncation
 * Given security definer since it's called by the trigger functions
 */

IF p_table_partition IS TRUE AND (p_suffix IS NULL) THEN
    RAISE EXCEPTION 'Table partition name requires a suffix value';
END IF;

IF p_table_partition THEN  -- 61 characters to account for _p in partition name
    IF char_length(p_object_name) + char_length(p_suffix) >= 61 THEN
        v_new_length := 61 - char_length(p_suffix);
        v_new_name := substring(p_object_name from 1 for v_new_length) || '_p' || p_suffix;
    ELSE
        v_new_name := p_object_name||'_p'||p_suffix;
    END IF;
ELSE
    IF char_length(p_object_name) + char_length(COALESCE(p_suffix, '')) >= 63 THEN
        v_new_length := 63 - char_length(COALESCE(p_suffix, ''));
        v_new_name := substring(p_object_name from 1 for v_new_length) || COALESCE(p_suffix, '');
    ELSE
        v_new_name := p_object_name||COALESCE(p_suffix, '');
    END IF;
END IF;

RETURN v_new_name;

END
$$;


CREATE OR REPLACE FUNCTION apply_cluster(p_parent_schema text, p_parent_tablename text, p_child_schema text, p_child_tablename text) RETURNS void
    LANGUAGE plpgsql SECURITY DEFINER
AS $$
DECLARE
    v_new_search_path   text := '@extschema@,pg_temp';
    v_old_search_path   text;
    v_parent_indexdef   text;
    v_relkind           char;
    v_row               record;
    v_sql               text;
BEGIN
/*
* Function to apply cluster from parent to child table
* Adapted from code fork by https://github.com/dturon/pg_partman
*/

SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');

SELECT c.relkind INTO v_relkind
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = p_parent_schema
AND c.relname = p_parent_tablename;

IF v_relkind = 'p' THEN
    RAISE EXCEPTION 'This function cannot run on natively partitioned tables';
ELSIF v_relkind IS NULL THEN
    RAISE EXCEPTION 'Unable to find given table in system catalogs: %.%', p_parent_schema, p_parent_tablename;
END IF;

WITH parent_info AS (
    SELECT c.oid AS parent_oid
    FROM pg_catalog.pg_class c
    JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
    WHERE n.nspname = p_parent_schema::name
    AND c.relname = p_parent_tablename::name
)
SELECT substring(pg_get_indexdef(i.indexrelid) from ' USING .*$') AS index_def
INTO v_parent_indexdef
FROM pg_catalog.pg_index i
JOIN pg_catalog.pg_class c ON i.indexrelid = c.oid
JOIN parent_info p ON p.parent_oid = indrelid
WHERE i.indisclustered = true;

-- Loop over all existing indexes in child table to find one with matching definition
FOR v_row IN
    WITH child_info AS (
        SELECT c.oid AS child_oid
        FROM pg_catalog.pg_class c
        JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
        WHERE n.nspname = p_child_schema::name
        AND c.relname = p_child_tablename::name
    )
    SELECT substring(pg_get_indexdef(i.indexrelid) from ' USING .*$') AS child_indexdef
        , c.relname AS child_indexname
    FROM pg_catalog.pg_index i
    JOIN pg_catalog.pg_class c ON i.indexrelid = c.oid
    JOIN child_info p ON p.child_oid = indrelid
LOOP
    IF v_row.child_indexdef = v_parent_indexdef THEN
        v_sql = format('ALTER TABLE %I.%I CLUSTER ON %I', p_child_schema, p_child_tablename, v_row.child_indexname);
        RAISE DEBUG '%', v_sql;
        EXECUTE v_sql;
    END IF;
END LOOP;

EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');

END;
$$;


CREATE OR REPLACE FUNCTION apply_privileges(p_parent_schema text, p_parent_tablename text, p_child_schema text, p_child_tablename text, p_job_id bigint DEFAULT NULL) RETURNS void
    LANGUAGE plpgsql SECURITY DEFINER
    AS $$
DECLARE

ex_context          text;
ex_detail           text;
ex_hint             text;
ex_message          text;
v_all               text[] := ARRAY['SELECT', 'INSERT', 'UPDATE', 'DELETE', 'TRUNCATE', 'REFERENCES', 'TRIGGER'];
v_child_grant       record;
v_child_owner       text;
v_grantees          text[];
v_job_id            bigint;
v_jobmon            boolean;
v_jobmon_schema     text;
v_match             boolean;
v_parent_grant      record;
v_parent_owner      text;
v_revoke            text;
v_row_revoke        record;
v_sql               text;
v_step_id           bigint;

BEGIN
/*
 * Apply privileges and ownership that exist on a given parent to the given child table
 */

SELECT jobmon INTO v_jobmon FROM @extschema@.part_config WHERE parent_table = p_parent_schema ||'.'|| p_parent_tablename;
IF v_jobmon IS NULL THEN
    RAISE EXCEPTION 'Given table is not managed by this extention: %.%', p_parent_schema, p_parent_tablename;
END IF;

SELECT pg_get_userbyid(c.relowner) INTO v_parent_owner
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = p_parent_schema::name
AND c.relname = p_parent_tablename::name;

SELECT pg_get_userbyid(c.relowner) INTO v_child_owner
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = p_child_schema::name
AND c.relname = p_child_tablename::name;

IF v_parent_owner IS NULL THEN
    RAISE EXCEPTION 'Given parent table does not exist: %.%', p_parent_schema, p_parent_tablename;
END IF;
IF v_child_owner IS NULL THEN
    RAISE EXCEPTION 'Given child table does not exist: %.%', p_child_schema, p_child_tablename;
END IF;

IF v_jobmon THEN
    SELECT nspname INTO v_jobmon_schema FROM pg_namespace n, pg_extension e WHERE e.extname = 'pg_jobmon' AND e.extnamespace = n.oid;
END IF;

IF v_jobmon_schema IS NOT NULL THEN
    IF p_job_id IS NULL THEN
        EXECUTE format('SELECT %I.add_job(%L)', v_jobmon_schema, format('PARTMAN APPLYING PRIVILEGES TO CHILD TABLE: %s.%s', p_child_schema, p_child_tablename)) INTO v_job_id;
    ELSE
        v_job_id := p_job_id;
    END IF;
    EXECUTE format('SELECT %I.add_step(%L, %L)', v_jobmon_schema, v_job_id, format('Setting new child table privileges for %s.%s', p_child_schema, p_child_tablename)) INTO v_step_id;
END IF;

IF v_jobmon_schema IS NOT NULL THEN

    EXECUTE format('SELECT %I.update_step(%L, %L, %L)'
            , v_jobmon_schema
            , v_step_id
            , 'PENDING'
            , format('Applying privileges on child partition: %s.%s'
                , p_child_schema
                , p_child_tablename)
            );
END IF;

FOR v_parent_grant IN
    SELECT array_agg(DISTINCT privilege_type::text ORDER BY privilege_type::text) AS types
            , grantee
    FROM @extschema@.table_privs
    WHERE table_schema = p_parent_schema::name AND table_name = p_parent_tablename::name
    GROUP BY grantee
LOOP
    -- Compare parent & child grants. Don't re-apply if it already exists
    v_match := false;
    v_sql := NULL;
    FOR v_child_grant IN
        SELECT array_agg(DISTINCT privilege_type::text ORDER BY privilege_type::text) AS types
                , grantee
        FROM @extschema@.table_privs
        WHERE table_schema = p_child_schema::name AND table_name = p_child_tablename::name
        GROUP BY grantee
    LOOP
        IF v_parent_grant.types = v_child_grant.types AND v_parent_grant.grantee = v_child_grant.grantee THEN
            v_match := true;
        END IF;
    END LOOP;

    IF v_match = false THEN
        IF v_parent_grant.grantee = 'PUBLIC' THEN
            v_sql := 'GRANT %s ON %I.%I TO %s';
        ELSE
            v_sql := 'GRANT %s ON %I.%I TO %I';
        END IF;
        EXECUTE format(v_sql
                        , array_to_string(v_parent_grant.types, ',')
                        , p_child_schema
                        , p_child_tablename
                        , v_parent_grant.grantee);
        v_sql := NULL;
        SELECT string_agg(r, ',') INTO v_revoke FROM (SELECT unnest(v_all) AS r EXCEPT SELECT unnest(v_parent_grant.types)) x;
        IF v_revoke IS NOT NULL THEN
            IF v_parent_grant.grantee = 'PUBLIC' THEN
                v_sql := 'REVOKE %s ON %I.%I FROM %s CASCADE';
            ELSE
                v_sql := 'REVOKE %s ON %I.%I FROM %I CASCADE';
            END IF;
            EXECUTE format(v_sql
                        , v_revoke
                        , p_child_schema
                        , p_child_tablename
                        , v_parent_grant.grantee);
            v_sql := NULL;
        END IF;
    END IF;

    v_grantees := array_append(v_grantees, v_parent_grant.grantee::text);

END LOOP;

-- Revoke all privileges from roles that have none on the parent
IF v_grantees IS NOT NULL THEN
    FOR v_row_revoke IN
        SELECT role FROM (
            SELECT DISTINCT grantee::text AS role FROM @extschema@.table_privs WHERE table_schema = p_child_schema::name AND table_name = p_child_tablename::name
            EXCEPT
            SELECT unnest(v_grantees)) x
    LOOP
        IF v_row_revoke.role IS NOT NULL THEN
            IF v_row_revoke.role = 'PUBLIC' THEN
                v_sql := 'REVOKE ALL ON %I.%I FROM %s';
            ELSE
                v_sql := 'REVOKE ALL ON %I.%I FROM %I';
            END IF;
            EXECUTE format(v_sql
                        , p_child_schema
                        , p_child_tablename
                        , v_row_revoke.role);
        END IF;
    END LOOP;

END IF;

IF v_parent_owner <> v_child_owner THEN
    EXECUTE format('ALTER TABLE %I.%I OWNER TO %I'
                , p_child_schema
                , p_child_tablename
                , v_parent_owner);
END IF;

IF v_jobmon_schema IS NOT NULL THEN
    EXECUTE format('SELECT %I.update_step(%L, %L, %L)', v_jobmon_schema, v_step_id, 'OK', 'Done');
    IF p_job_id IS NULL THEN
        EXECUTE format('SELECT %I.close_job(%L)', v_jobmon_schema, v_job_id);
    END IF;
END IF;

EXCEPTION
    WHEN OTHERS THEN
        GET STACKED DIAGNOSTICS ex_message = MESSAGE_TEXT,
                                ex_context = PG_EXCEPTION_CONTEXT,
                                ex_detail = PG_EXCEPTION_DETAIL,
                                ex_hint = PG_EXCEPTION_HINT;
        IF v_jobmon_schema IS NOT NULL THEN
            IF v_job_id IS NULL THEN
                EXECUTE format('SELECT %I.add_job(''PARTMAN RE-APPLYING PRIVILEGES TO ALL CHILD TABLES OF: %s'')', v_jobmon_schema, p_parent_tablename) INTO v_job_id;
                EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before job logging started'')', v_jobmon_schema, v_job_id, p_parent_tablename) INTO v_step_id;
            ELSIF v_step_id IS NULL THEN
                EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before first step logged'')', v_jobmon_schema, v_job_id) INTO v_step_id;
            END IF;
            EXECUTE format('SELECT %I.update_step(%s, ''CRITICAL'', %L)', v_jobmon_schema, v_step_id, 'ERROR: '||coalesce(SQLERRM,'unknown'));
            EXECUTE format('SELECT %I.fail_job(%s)', v_jobmon_schema, v_job_id);
        END IF;
        RAISE EXCEPTION '%
CONTEXT: %
DETAIL: %
HINT: %', ex_message, ex_context, ex_detail, ex_hint;
END
$$;


CREATE OR REPLACE FUNCTION create_trigger(p_parent_table text) RETURNS void
    LANGUAGE plpgsql SECURITY DEFINER
    AS $$
DECLARE

v_function_name         text;
v_new_search_path       text := '@extschema@,pg_temp';
v_old_search_path       text;
v_parent_schema         text;
v_parent_tablename      text;
v_relkind               char;
v_trig_name             text;
v_trig_sql              text;

BEGIN
/*
 * Function to create partitioning trigger on parent table
 */

SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');

SELECT n.nspname, c.relname, c.relkind INTO v_parent_schema, v_parent_tablename, v_relkind
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = split_part(p_parent_table, '.', 1)::name
AND c.relname = split_part(p_parent_table, '.', 2)::name;

IF v_relkind = 'p' THEN
    RAISE EXCEPTION 'This function cannot run on natively partitioned tables';
ELSIF v_relkind IS NULL THEN
    RAISE EXCEPTION 'Unable to find given table in system catalogs: %.%', v_parent_schema, v_parent_tablename;
END IF;

v_trig_name := @extschema@.check_name_length(p_object_name := v_parent_tablename, p_suffix := '_part_trig');
-- Ensure function name matches the naming pattern
v_function_name := @extschema@.check_name_length(v_parent_tablename, '_part_trig_func', FALSE);
v_trig_sql := format('CREATE TRIGGER %I BEFORE INSERT ON %I.%I FOR EACH ROW EXECUTE PROCEDURE %I.%I()'
    , v_trig_name
    , v_parent_schema
    , v_parent_tablename
    , v_parent_schema
    , v_function_name);

EXECUTE v_trig_sql;

EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');

END
$$;


/*
 * Function to ensure a column is dropped in all child tables, no matter when it was created
 */
CREATE OR REPLACE FUNCTION drop_partition_column(p_parent_table text, p_column text) RETURNS void
    LANGUAGE plpgsql SECURITY DEFINER
    AS $$
DECLARE

v_parent_oid        oid;
v_parent_schema     text;
v_parent_tablename  text;
v_row               record;

BEGIN

SELECT c.oid, n.nspname, c.relname INTO v_parent_oid, v_parent_schema, v_parent_tablename
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = split_part(p_parent_table, '.', 1)::name
AND c.relname = split_part(p_parent_table, '.', 2)::name;

IF v_parent_oid IS NULL THEN
    RAISE EXCEPTION 'Given parent table does not exist: %', p_parent_table;
END IF;

EXECUTE format('ALTER TABLE %I.%I DROP COLUMN IF EXISTS %I', v_parent_schema, v_parent_tablename, p_column);

FOR v_row IN
    SELECT n.nspname AS child_schema, c.relname AS child_table
    FROM pg_catalog.pg_inherits h
    JOIN pg_catalog.pg_class c ON h.inhrelid = c.oid
    JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
    WHERE inhparent = v_parent_oid
LOOP

    EXECUTE format('ALTER TABLE %I.%I DROP COLUMN IF EXISTS %I', v_row.child_schema, v_row.child_table, p_column);

END LOOP;

END
$$;


CREATE OR REPLACE FUNCTION partition_data_time(
        p_parent_table text
        , p_batch_count int DEFAULT 1
        , p_batch_interval interval DEFAULT NULL
        , p_lock_wait numeric DEFAULT 0
        , p_order text DEFAULT 'ASC'
        , p_analyze boolean DEFAULT true)
    RETURNS bigint
    LANGUAGE plpgsql SECURITY DEFINER
    AS $$
DECLARE

v_control                   text;
v_control_type              text;
v_datetime_string           text;
v_current_partition_name    text;
v_epoch                     text;
v_last_partition            text;
v_lock_iter                 int := 1;
v_lock_obtained             boolean := FALSE;
v_max_partition_timestamp   timestamptz;
v_min_partition_timestamp   timestamptz;
v_new_search_path           text := '@extschema@,pg_temp';
v_old_search_path           text;
v_parent_schema             text;
v_parent_tablename          text;
v_partition_expression      text;
v_partition_interval        interval;
v_partition_suffix          text;
v_partition_timestamp       timestamptz[];
v_rowcount                  bigint;
v_start_control             timestamptz;
v_total_rows                bigint := 0;
v_type                      text;

BEGIN
/*
 * Populate the child table(s) of a time-based partition set with old data from the original parent
 */

SELECT partition_type
    , partition_interval::interval
    , control
    , datetime_string
    , epoch
INTO v_type
    , v_partition_interval
    , v_control
    , v_datetime_string
    , v_epoch
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND partition_type IN ('partman', 'time-custom');
IF NOT FOUND THEN
    RAISE EXCEPTION 'ERROR: No entry in part_config found for non-native partitioning for given table:  %', p_parent_table;
END IF;

SELECT schemaname, tablename INTO v_parent_schema, v_parent_tablename
FROM pg_catalog.pg_tables
WHERE schemaname = split_part(p_parent_table, '.', 1)::name
AND tablename = split_part(p_parent_table, '.', 2)::name;

SELECT general_type INTO v_control_type FROM @extschema@.check_control_type(v_parent_schema, v_parent_tablename, v_control);
IF v_control_type <> 'time' THEN
    IF (v_control_type = 'id' AND v_epoch = 'none') OR v_control_type <> 'id' THEN
        RAISE EXCEPTION 'Cannot run on partition set without time based control column or epoch flag set with an id column. Found control: %, epoch: %', v_control_type, v_epoch;
    END IF;
END IF;

SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');

IF p_batch_interval IS NULL OR p_batch_interval > v_partition_interval THEN
    p_batch_interval := v_partition_interval;
END IF;

SELECT partition_tablename INTO v_last_partition FROM @extschema@.show_partitions(p_parent_table, 'DESC') LIMIT 1;

v_partition_expression := CASE
    WHEN v_epoch = 'seconds' THEN format('to_timestamp(%I)', v_control)
    WHEN v_epoch = 'milliseconds' THEN format('to_timestamp((%I/1000)::float)', v_control)
    ELSE format('%I', v_control)
END;

FOR i IN 1..p_batch_count LOOP

    IF p_order = 'ASC' THEN
        EXECUTE format('SELECT min(%s) FROM ONLY %I.%I', v_partition_expression, v_parent_schema, v_parent_tablename) INTO v_start_control;
    ELSIF p_order = 'DESC' THEN
        EXECUTE format('SELECT max(%s) FROM ONLY %I.%I', v_partition_expression, v_parent_schema, v_parent_tablename) INTO v_start_control;
    ELSE
        RAISE EXCEPTION 'Invalid value for p_order. Must be ASC or DESC';
    END IF;

    IF v_start_control IS NULL THEN
        EXIT;
    END IF;

    IF v_type = 'partman' THEN
        CASE
            WHEN v_partition_interval = '15 mins' THEN
                v_min_partition_timestamp := date_trunc('hour', v_start_control) +
                    '15min'::interval * floor(date_part('minute', v_start_control) / 15.0);
            WHEN v_partition_interval = '30 mins' THEN
                v_min_partition_timestamp := date_trunc('hour', v_start_control) +
                    '30min'::interval * floor(date_part('minute', v_start_control) / 30.0);
            WHEN v_partition_interval = '1 hour' THEN
                v_min_partition_timestamp := date_trunc('hour', v_start_control);
            WHEN v_partition_interval = '1 day' THEN
                v_min_partition_timestamp := date_trunc('day', v_start_control);
            WHEN v_partition_interval = '1 week' THEN
                v_min_partition_timestamp := date_trunc('week', v_start_control);
            WHEN v_partition_interval = '1 month' THEN
                v_min_partition_timestamp := date_trunc('month', v_start_control);
            WHEN v_partition_interval = '3 months' THEN
                v_min_partition_timestamp := date_trunc('quarter', v_start_control);
            WHEN v_partition_interval = '1 year' THEN
                v_min_partition_timestamp := date_trunc('year', v_start_control);
        END CASE;
    ELSIF v_type = 'time-custom' THEN
        SELECT child_start_time INTO v_min_partition_timestamp FROM @extschema@.show_partition_info(v_parent_schema||'.'||v_last_partition
            , v_partition_interval::text
            , p_parent_table);
        v_max_partition_timestamp := v_min_partition_timestamp + v_partition_interval;
        LOOP
            IF v_start_control >= v_min_partition_timestamp AND v_start_control < v_max_partition_timestamp THEN
                EXIT;
            ELSE
                BEGIN
                    IF v_start_control > v_max_partition_timestamp THEN
                        -- Keep going forward in time, checking if child partition time interval encompasses the current v_start_control value
                        v_min_partition_timestamp := v_max_partition_timestamp;
                        v_max_partition_timestamp := v_max_partition_timestamp + v_partition_interval;

                    ELSE
                        -- Keep going backwards in time, checking if child partition time interval encompasses the current v_start_control value
                        v_max_partition_timestamp := v_min_partition_timestamp;
                        v_min_partition_timestamp := v_min_partition_timestamp - v_partition_interval;
                    END IF;
                EXCEPTION WHEN datetime_field_overflow THEN
                    RAISE EXCEPTION 'Attempted partition time interval is outside PostgreSQL''s supported time range.
                        Unable to create partition with interval before timestamp % ', v_min_partition_timestamp;
                END;
            END IF;
        END LOOP;

    END IF;

    v_partition_timestamp := ARRAY[v_min_partition_timestamp];
    IF p_order = 'ASC' THEN
        -- Ensure batch interval given as parameter doesn't cause maximum to overflow the current partition maximum
        IF (v_start_control + p_batch_interval) >= (v_min_partition_timestamp + v_partition_interval) THEN
            v_max_partition_timestamp := v_min_partition_timestamp + v_partition_interval;
        ELSE
            v_max_partition_timestamp := v_start_control + p_batch_interval;
        END IF;
    ELSIF p_order = 'DESC' THEN
        -- Must be greater than max value still in parent table since query below grabs < max
        v_max_partition_timestamp := v_min_partition_timestamp + v_partition_interval;
        -- Ensure batch interval given as parameter doesn't cause minimum to underflow current partition minimum
        IF (v_start_control - p_batch_interval) >= v_min_partition_timestamp THEN
            v_min_partition_timestamp = v_start_control - p_batch_interval;
        END IF;
    ELSE
        RAISE EXCEPTION 'Invalid value for p_order. Must be ASC or DESC';
    END IF;

-- do some locking with timeout, if required
    IF p_lock_wait > 0  THEN
        v_lock_iter := 0;
        WHILE v_lock_iter <= 5 LOOP
            v_lock_iter := v_lock_iter + 1;
            BEGIN
                EXECUTE format('SELECT * FROM ONLY %I.%I WHERE %s >= %L AND %3$s < %5$L FOR UPDATE NOWAIT'
                    , v_parent_schema
                    , v_parent_tablename
                    , v_partition_expression
                    , v_min_partition_timestamp
                    , v_max_partition_timestamp);
                v_lock_obtained := TRUE;
            EXCEPTION
                WHEN lock_not_available THEN
                    PERFORM pg_sleep( p_lock_wait / 5.0 );
                    CONTINUE;
            END;
            EXIT WHEN v_lock_obtained;
        END LOOP;
        IF NOT v_lock_obtained THEN
           RETURN -1;
        END IF;
    END IF;

    PERFORM @extschema@.create_partition_time(p_parent_table, v_partition_timestamp, p_analyze);
    -- This suffix generation code is in create_partition_time() as well
    v_partition_suffix := to_char(v_min_partition_timestamp, v_datetime_string);
    v_current_partition_name := @extschema@.check_name_length(v_parent_tablename, v_partition_suffix, TRUE);

    EXECUTE format('WITH partition_data AS (
                        DELETE FROM ONLY %I.%I WHERE %s >= %L AND %3$s < %5$L RETURNING *)
                     INSERT INTO %I.%I SELECT * FROM partition_data'
                        , v_parent_schema
                        , v_parent_tablename
                        , v_partition_expression
                        , v_min_partition_timestamp
                        , v_max_partition_timestamp
                        , v_parent_schema
                        , v_current_partition_name);
    GET DIAGNOSTICS v_rowcount = ROW_COUNT;
    v_total_rows := v_total_rows + v_rowcount;
    IF v_rowcount = 0 THEN
        EXIT;
    END IF;

END LOOP;

PERFORM @extschema@.create_function_time(p_parent_table);

EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');

RETURN v_total_rows;

END
$$;


CREATE OR REPLACE FUNCTION create_function_id(p_parent_table text, p_job_id bigint DEFAULT NULL) RETURNS void
    LANGUAGE plpgsql SECURITY DEFINER
    AS $$
DECLARE

ex_context                      text;
ex_detail                       text;
ex_hint                         text;
ex_message                      text;
v_control                       text;
v_control_type                  text;
v_count                         int;
v_current_partition_name        text;
v_current_partition_id          bigint;
v_datetime_string               text;
v_final_partition_id            bigint;
v_function_name                 text;
v_higher_parent_schema          text := split_part(p_parent_table, '.', 1);
v_higher_parent_table           text := split_part(p_parent_table, '.', 2);
v_id_position                   int;
v_job_id                        bigint;
v_jobmon                        boolean;
v_jobmon_schema                 text;
v_last_partition                text;
v_max                           bigint;
v_next_partition_id             bigint;
v_next_partition_name           text;
v_new_search_path               text := '@extschema@,pg_temp';
v_old_search_path               text;
v_optimize_trigger              int;
v_parent_schema                 text;
v_parent_tablename              text;
v_partition_interval            bigint;
v_premake                       int;
v_prev_partition_id             bigint;
v_prev_partition_name           text;
v_relkind                       char;
v_row_max_id                    record;
v_run_maint                     text;
v_step_id                       bigint;
v_top_parent                    text := p_parent_table;
v_trig_func                     text;
v_trigger_exception_handling    boolean;
v_trigger_return_null           boolean;
v_upsert                        text;

BEGIN
/*
 * Create the trigger function for the parent table of an id-based partition set
 */

SELECT partition_interval::bigint
    , control
    , premake
    , optimize_trigger
    , automatic_maintenance
    , jobmon
    , trigger_exception_handling
    , upsert
    , trigger_return_null
INTO v_partition_interval
    , v_control
    , v_premake
    , v_optimize_trigger
    , v_run_maint
    , v_jobmon
    , v_trigger_exception_handling
    , v_upsert
    , v_trigger_return_null
FROM @extschema@.part_config
WHERE parent_table = p_parent_table
AND partition_type = 'partman';

IF NOT FOUND THEN
    RAISE EXCEPTION 'ERROR: no non-native pg_partman config found for %', p_parent_table;
END IF;

SELECT n.nspname, c.relname, c.relkind INTO v_parent_schema, v_parent_tablename, v_relkind
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = split_part(p_parent_table, '.', 1)::name
AND c.relname = split_part(p_parent_table, '.', 2)::name;

IF v_relkind = 'p' THEN
    RAISE EXCEPTION 'This function cannot run on natively partitioned tables';
ELSIF v_relkind IS NULL THEN
    RAISE EXCEPTION 'Unable to find given table in system catalogs: %.%', v_parent_schema, v_parent_tablename;
END IF;

SELECT general_type INTO v_control_type FROM @extschema@.check_control_type(v_parent_schema, v_parent_tablename, v_control);
IF v_control_type <> 'id' THEN
    RAISE EXCEPTION 'Cannot run create_function_id on partition set without id based control column. Found: %', v_control_type;
END IF;

SELECT current_setting('search_path') INTO v_old_search_path;
IF v_jobmon THEN
    SELECT nspname INTO v_jobmon_schema FROM pg_catalog.pg_namespace n, pg_catalog.pg_extension e WHERE e.extname = 'pg_jobmon'::name AND e.extnamespace = n.oid;
    IF v_jobmon_schema IS NOT NULL THEN
        v_new_search_path := '@extschema@,'||v_jobmon_schema||',pg_temp';
    END IF;
END IF;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');

SELECT partition_tablename INTO v_last_partition FROM @extschema@.show_partitions(p_parent_table, 'DESC') LIMIT 1;

v_function_name := @extschema@.check_name_length(v_parent_tablename, '_part_trig_func', FALSE);

IF v_jobmon_schema IS NOT NULL THEN
    IF p_job_id IS NULL THEN
        v_job_id := add_job(format('PARTMAN CREATE FUNCTION: %s', p_parent_table));
    ELSE
        v_job_id = p_job_id;
    END IF;
    v_step_id := add_step(v_job_id, format('Creating partition function for table %s', p_parent_table));
END IF;

-- Get the highest level top parent if multi-level partitioned in order to get proper max() value below
WHILE v_higher_parent_table IS NOT NULL LOOP -- initially set in DECLARE
    WITH top_oid AS (
        SELECT i.inhparent AS top_parent_oid
        FROM pg_catalog.pg_inherits i
        JOIN pg_catalog.pg_class c ON c.oid = i.inhrelid
        JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
        WHERE n.nspname = v_higher_parent_schema::name
        AND c.relname = v_higher_parent_table::name
    ) SELECT n.nspname, c.relname
    INTO v_higher_parent_schema, v_higher_parent_table
    FROM pg_catalog.pg_class c
    JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace
    JOIN top_oid t ON c.oid = t.top_parent_oid
    JOIN @extschema@.part_config p ON p.parent_table = n.nspname||'.'||c.relname
    WHERE p.partition_type = 'id';

    IF v_higher_parent_table IS NOT NULL THEN
        -- initially set in DECLARE
        v_top_parent := v_higher_parent_schema||'.'||v_higher_parent_table;
    END IF;

END LOOP;

-- Loop through child tables starting from highest to get current max value in partition set
-- Avoids doing a scan on entire partition set and/or getting any values accidentally in parent.
FOR v_row_max_id IN
    SELECT partition_schemaname, partition_tablename FROM @extschema@.show_partitions(v_top_parent, 'DESC')
LOOP
        EXECUTE format('SELECT max(%I) FROM %I.%I', v_control, v_row_max_id.partition_schemaname, v_row_max_id.partition_tablename) INTO v_max;
        IF v_max IS NOT NULL THEN
            EXIT;
        END IF;
END LOOP;
IF v_max IS NULL THEN
    v_max := 0;
END IF;
v_current_partition_id = v_max - (v_max % v_partition_interval);
v_next_partition_id := v_current_partition_id + v_partition_interval;
v_current_partition_name := @extschema@.check_name_length(v_parent_tablename, v_current_partition_id::text, TRUE);

v_trig_func := format('CREATE OR REPLACE FUNCTION %I.%I() RETURNS trigger LANGUAGE plpgsql AS $t$
    DECLARE
        v_count                     int;
        v_current_partition_id      bigint;
        v_current_partition_name    text;
        v_id_position               int;
        v_last_partition            text := %L;
        v_next_partition_id         bigint;
        v_next_partition_name       text;
        v_partition_created         boolean;
    BEGIN
    IF TG_OP = ''INSERT'' THEN
        IF NEW.%I >= %s AND NEW.%I < %s THEN '
            , v_parent_schema
            , v_function_name
            , v_last_partition
            , v_control
            , v_current_partition_id
            , v_control
            , v_next_partition_id
        );
        SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname = v_parent_schema::name AND tablename = v_current_partition_name::name;
        IF v_count > 0 THEN
            v_trig_func := v_trig_func || format('
            INSERT INTO %I.%I VALUES (NEW.*) %s; ', v_parent_schema, v_current_partition_name, v_upsert);
        ELSE
            v_trig_func := v_trig_func || '
            -- Child table for current values does not exist in this partition set, so write to parent
            RETURN NEW;';
        END IF;

    FOR i IN 1..v_optimize_trigger LOOP
        v_prev_partition_id := v_current_partition_id - (v_partition_interval * i);
        v_next_partition_id := v_current_partition_id + (v_partition_interval * i);
        v_final_partition_id := v_next_partition_id + v_partition_interval;
        v_prev_partition_name := @extschema@.check_name_length(v_parent_tablename, v_prev_partition_id::text, TRUE);
        v_next_partition_name := @extschema@.check_name_length(v_parent_tablename, v_next_partition_id::text, TRUE);

        -- Check that child table exist before making a rule to insert to them.
        -- Handles optimize_trigger being larger than premake (to go back in time further) and edge case of changing optimize_trigger immediately after running create_parent().
        SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname = v_parent_schema::name AND tablename = v_prev_partition_name::name;
        IF v_count > 0 THEN
            -- Only handle previous partitions if they're starting above zero
            IF v_prev_partition_id >= 0 THEN
                v_trig_func := v_trig_func ||format('
        ELSIF NEW.%I >= %s AND NEW.%I < %s THEN
            INSERT INTO %I.%I VALUES (NEW.*) %s; '
                , v_control
                , v_prev_partition_id
                , v_control
                , v_prev_partition_id + v_partition_interval
                , v_parent_schema
                , v_prev_partition_name
                , v_upsert
            );
            END IF;
        END IF;

        SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname = v_parent_schema::name AND tablename = v_next_partition_name::name;
        IF v_count > 0 THEN
            v_trig_func := v_trig_func ||format('
        ELSIF NEW.%I >= %s AND NEW.%I < %s THEN
            INSERT INTO %I.%I VALUES (NEW.*) %s;'
                , v_control
                , v_next_partition_id
                , v_control
                , v_final_partition_id
                , v_parent_schema
                , v_next_partition_name
                , v_upsert
            );
        END IF;
    END LOOP;
    v_trig_func := v_trig_func ||format('
        ELSE
            v_current_partition_id := NEW.%I - (NEW.%I %% %s);
            v_current_partition_name := @extschema@.check_name_length(%L, v_current_partition_id::text, TRUE);
            SELECT count(*) INTO v_count FROM pg_catalog.pg_tables WHERE schemaname = %L::name AND tablename = v_current_partition_name::name;
            IF v_count > 0 THEN
                EXECUTE format(''INSERT INTO %%I.%%I VALUES($1.*) %s'', %L, v_current_partition_name) USING NEW;
            ELSE
                RETURN NEW;
            END IF;
        END IF;'
            , v_control
            , v_control
            , v_partition_interval
            , v_parent_tablename
            , v_parent_schema
            , v_upsert
            , v_parent_schema
        );

    v_trig_func := v_trig_func ||'
    END IF;';

    IF v_trigger_return_null IS TRUE THEN
        v_trig_func := v_trig_func ||'
    RETURN NULL;';
    ELSE
        v_trig_func := v_trig_func ||'
    RETURN NEW;';
    END IF;

    IF v_trigger_exception_handling THEN
        v_trig_func := v_trig_func ||'
    EXCEPTION WHEN OTHERS THEN
        RAISE WARNING ''pg_partman insert into child table failed, row inserted into parent (%.%). ERROR: %'', TG_TABLE_SCHEMA, TG_TABLE_NAME, COALESCE(SQLERRM, ''unknown'');
        RETURN NEW;';
    END IF;

    v_trig_func := v_trig_func ||'
    END $t$;';

EXECUTE v_trig_func;

IF v_jobmon_schema IS NOT NULL THEN
    PERFORM update_step(v_step_id, 'OK', format('Added function for current id interval: %s to %s', v_current_partition_id, v_final_partition_id-1));
END IF;

IF v_jobmon_schema IS NOT NULL THEN
    PERFORM close_job(v_job_id);
END IF;

EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');

EXCEPTION
    WHEN OTHERS THEN
        GET STACKED DIAGNOSTICS ex_message = MESSAGE_TEXT,
                                ex_context = PG_EXCEPTION_CONTEXT,
                                ex_detail = PG_EXCEPTION_DETAIL,
                                ex_hint = PG_EXCEPTION_HINT;
        IF v_jobmon_schema IS NOT NULL THEN
            IF v_job_id IS NULL THEN
                EXECUTE format('SELECT %I.add_job(''PARTMAN CREATE FUNCTION: %s'')', v_jobmon_schema, p_parent_table) INTO v_job_id;
                EXECUTE format('SELECT %I.add_step(%s, ''Partition function maintenance for table %s failed'')', v_jobmon_schema, v_job_id, p_parent_table) INTO v_step_id;
            ELSIF v_step_id IS NULL THEN
                EXECUTE format('SELECT %I.add_step(%s, ''EXCEPTION before first step logged'')', v_jobmon_schema, v_job_id) INTO v_step_id;
            END IF;
            EXECUTE format('SELECT %I.update_step(%s, ''CRITICAL'', %L)', v_jobmon_schema, v_step_id, 'ERROR: '||coalesce(SQLERRM,'unknown'));
            EXECUTE format('SELECT %I.fail_job(%s)', v_jobmon_schema, v_job_id);
        END IF;
        RAISE EXCEPTION '%
CONTEXT: %
DETAIL: %
HINT: %', ex_message, ex_context, ex_detail, ex_hint;
END
$$;


CREATE OR REPLACE FUNCTION show_partitions (p_parent_table text, p_order text DEFAULT 'ASC') RETURNS TABLE (partition_schemaname text, partition_tablename text)
    LANGUAGE plpgsql STABLE SECURITY DEFINER
    AS $$
DECLARE

v_control               text;
v_control_type          text;
v_datetime_string       text;
v_epoch                 text;
v_new_search_path       text := '@extschema@,pg_temp';
v_old_search_path       text;
v_parent_schema         text;
v_parent_tablename      text;
v_partition_interval    text;
v_type                  text;

BEGIN
/*
 * Function to list all child partitions in a set in logical order.
 */

SELECT current_setting('search_path') INTO v_old_search_path;
EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_new_search_path, 'false');

IF upper(p_order) NOT IN ('ASC', 'DESC') THEN
    EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');
    RAISE EXCEPTION 'p_order paramter must be one of the following values: ASC, DESC';
END IF;

SELECT partition_type
    , partition_interval
    , datetime_string
    , control
    , epoch
INTO v_type
    , v_partition_interval
    , v_datetime_string
    , v_control
    , v_epoch
FROM @extschema@.part_config
WHERE parent_table = p_parent_table;

SELECT n.nspname, c.relname INTO v_parent_schema, v_parent_tablename
FROM pg_catalog.pg_class c
JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
WHERE n.nspname = split_part(p_parent_table, '.', 1)::name
AND c.relname = split_part(p_parent_table, '.', 2)::name;

SELECT general_type INTO v_control_type FROM @extschema@.check_control_type(v_parent_schema, v_parent_tablename, v_control);

IF v_control_type = 'time' OR (v_control_type = 'id' AND v_epoch <> 'none') THEN

    IF v_partition_interval::interval <> '3 months' OR (v_partition_interval::interval = '3 months' AND v_type = 'time-custom') THEN
        RETURN QUERY EXECUTE
        format('SELECT n.nspname::text AS partition_schemaname, c.relname::text AS partition_name FROM
        pg_catalog.pg_inherits h
        JOIN pg_catalog.pg_class c ON c.oid = h.inhrelid
        JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
        WHERE h.inhparent = ''%I.%I''::regclass
        ORDER BY to_timestamp(substring(c.relname from ((length(c.relname) - position(''p_'' in reverse(c.relname))) + 2) ), %L) %s'
            , v_parent_schema
            , v_parent_tablename
            , v_datetime_string
            , p_order);
    ELSE
        -- For quarterly, to_timestamp() doesn't recognize "Q" in datetime string.
        -- First order by just the year, then order by the quarter number (should be last character in table name)
        RETURN QUERY EXECUTE
        format('SELECT n.nspname::text AS partition_schemaname, c.relname::text AS partition_name FROM
        pg_catalog.pg_inherits h
        JOIN pg_catalog.pg_class c ON c.oid = h.inhrelid
        JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
        WHERE h.inhparent = ''%I.%I''::regclass
        ORDER BY to_timestamp(substring(c.relname from ((length(c.relname) - position(''p_'' in reverse(c.relname))) + 2) for 4), ''YYYY'') %s
            , substring(reverse(c.relname) from 1 for 1) %s'
            , v_parent_schema
            , v_parent_tablename
            , p_order
            , p_order);
    END IF;

ELSIF v_control_type = 'id' THEN
    RETURN QUERY EXECUTE
    format('SELECT n.nspname::text AS partition_schemaname, c.relname::text AS partition_name FROM
    pg_catalog.pg_inherits h
    JOIN pg_catalog.pg_class c ON c.oid = h.inhrelid
    JOIN pg_catalog.pg_namespace n ON c.relnamespace = n.oid
    WHERE h.inhparent = ''%I.%I''::regclass
    ORDER BY substring(c.relname from ((length(c.relname) - position(''p_'' in reverse(c.relname))) + 2) )::bigint %s'
        , v_parent_schema
        , v_parent_tablename
        , p_order);

END IF;

EXECUTE format('SELECT set_config(%L, %L, %L)', 'search_path', v_old_search_path, 'false');

END
$$;
