/usr/share/postgresql/9.6/extension/citus--5.0-1.sql is in postgresql-9.6-citus 6.0.1.PGDG-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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-- complain if script is sourced in psql, rather than via CREATE EXTENSION
\echo Use "CREATE EXTENSION citus" to load this file. \quit
CREATE SCHEMA citus;
-- Ensure CREATE EXTENSION is not run against an old citus data
-- directory, we're not compatible (due to the builtin functions/tables)
DO $$
BEGIN
IF EXISTS(SELECT * FROM pg_proc WHERE proname = 'worker_apply_shard_ddl_command') THEN
RAISE 'cannot install citus extension in Citus 4 data directory';
END IF;
END;
$$;
/*****************************************************************************
* Citus data types
*****************************************************************************/
CREATE TYPE citus.distribution_type AS ENUM (
'hash',
'range',
'append'
);
/*****************************************************************************
* Citus tables & corresponding indexes
*****************************************************************************/
CREATE TABLE citus.pg_dist_partition(
logicalrelid Oid NOT NULL, /* type changed to regclass as of version 6.0-1 */
partmethod "char" NOT NULL,
partkey text NOT NULL
);
/* SELECT granted to PUBLIC in upgrade script */
CREATE UNIQUE INDEX pg_dist_partition_logical_relid_index
ON citus.pg_dist_partition using btree(logicalrelid);
ALTER TABLE citus.pg_dist_partition SET SCHEMA pg_catalog;
CREATE TABLE citus.pg_dist_shard(
logicalrelid oid NOT NULL, /* type changed to regclass as of version 6.0-1 */
shardid int8 NOT NULL,
shardstorage "char" NOT NULL,
shardalias text,
shardminvalue text,
shardmaxvalue text
);
/* SELECT granted to PUBLIC in upgrade script */
CREATE UNIQUE INDEX pg_dist_shard_shardid_index
ON citus.pg_dist_shard using btree(shardid);
CREATE INDEX pg_dist_shard_logical_relid_index
ON citus.pg_dist_shard using btree(logicalrelid);
ALTER TABLE citus.pg_dist_shard SET SCHEMA pg_catalog;
CREATE TABLE citus.pg_dist_shard_placement(
shardid int8 NOT NULL,
shardstate int4 NOT NULL,
shardlength int8 NOT NULL,
nodename text NOT NULL,
nodeport int8 NOT NULL
) WITH oids;
/* SELECT granted to PUBLIC in upgrade script */
CREATE UNIQUE INDEX pg_dist_shard_placement_oid_index
ON citus.pg_dist_shard_placement using btree(oid);
CREATE INDEX pg_dist_shard_placement_shardid_index
ON citus.pg_dist_shard_placement using btree(shardid);
CREATE INDEX pg_dist_shard_placement_nodeid_index
ON citus.pg_dist_shard_placement using btree(nodename, nodeport);
ALTER TABLE citus.pg_dist_shard_placement SET SCHEMA pg_catalog;
/*****************************************************************************
* Citus sequences
*****************************************************************************/
/*
* Unternal sequence to generate 64-bit shard ids. These identifiers are then
* used to identify shards in the distributed database.
*/
CREATE SEQUENCE citus.pg_dist_shardid_seq
MINVALUE 102008
NO CYCLE;
ALTER SEQUENCE citus.pg_dist_shardid_seq SET SCHEMA pg_catalog;
/*
* internal sequence to generate 32-bit jobIds. These identifiers are then
* used to identify jobs in the distributed database; and they wrap at 32-bits
* to allow for slave nodes to independently execute their distributed jobs.
*/
CREATE SEQUENCE citus.pg_dist_jobid_seq
MINVALUE 2 /* first jobId reserved for clean up jobs */
MAXVALUE 4294967296;
ALTER SEQUENCE citus.pg_dist_jobid_seq SET SCHEMA pg_catalog;
/*****************************************************************************
* Citus functions
*****************************************************************************/
/* For backward compatibility and ease of use create functions et al. in pg_catalog */
SET search_path = 'pg_catalog';
/* master_* functions */
CREATE FUNCTION master_get_table_metadata(relation_name text, OUT logical_relid oid,
OUT part_storage_type "char",
OUT part_method "char", OUT part_key text,
OUT part_replica_count integer,
OUT part_max_size bigint,
OUT part_placement_policy integer)
RETURNS record
LANGUAGE C STABLE STRICT
AS 'MODULE_PATHNAME', $$master_get_table_metadata$$;
COMMENT ON FUNCTION master_get_table_metadata(relation_name text)
IS 'fetch metadata values for the table';
CREATE FUNCTION master_get_table_ddl_events(text)
RETURNS SETOF text
LANGUAGE C STRICT ROWS 100
AS 'MODULE_PATHNAME', $$master_get_table_ddl_events$$;
COMMENT ON FUNCTION master_get_table_ddl_events(text)
IS 'fetch set of ddl statements for the table';
CREATE FUNCTION master_get_new_shardid()
RETURNS bigint
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$master_get_new_shardid$$;
COMMENT ON FUNCTION master_get_new_shardid()
IS 'fetch unique shardId';
CREATE FUNCTION master_get_local_first_candidate_nodes(OUT node_name text,
OUT node_port bigint)
RETURNS SETOF record
LANGUAGE C STRICT ROWS 100
AS 'MODULE_PATHNAME', $$master_get_local_first_candidate_nodes$$;
COMMENT ON FUNCTION master_get_local_first_candidate_nodes()
IS 'fetch set of candidate nodes for shard uploading choosing the local node first';
CREATE FUNCTION master_create_empty_shard(text)
RETURNS bigint
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$master_create_empty_shard$$;
COMMENT ON FUNCTION master_create_empty_shard(text)
IS 'create an empty shard and shard placements for the table';
CREATE FUNCTION master_append_table_to_shard(bigint, text, text, integer)
RETURNS real
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$master_append_table_to_shard$$;
COMMENT ON FUNCTION master_append_table_to_shard(bigint, text, text, integer)
IS 'append given table to all shard placements and update metadata';
CREATE FUNCTION master_drop_all_shards(logicalrelid regclass,
schema_name text,
table_name text)
RETURNS integer
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$master_drop_all_shards$$;
COMMENT ON FUNCTION master_drop_all_shards(regclass, text, text)
IS 'drop all shards in a relation and update metadata';
CREATE FUNCTION master_apply_delete_command(text)
RETURNS integer
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$master_apply_delete_command$$;
COMMENT ON FUNCTION master_apply_delete_command(text)
IS 'drop shards matching delete criteria and update metadata';
CREATE FUNCTION master_get_active_worker_nodes(OUT node_name text, OUT node_port bigint)
RETURNS SETOF record
LANGUAGE C STRICT ROWS 100
AS 'MODULE_PATHNAME', $$master_get_active_worker_nodes$$;
COMMENT ON FUNCTION master_get_active_worker_nodes()
IS 'fetch set of active worker nodes';
CREATE FUNCTION master_get_round_robin_candidate_nodes(shard_id bigint,
OUT node_name text,
OUT node_port bigint)
RETURNS SETOF record
LANGUAGE C STRICT ROWS 100
AS 'MODULE_PATHNAME', $$master_get_round_robin_candidate_nodes$$;
COMMENT ON FUNCTION master_get_round_robin_candidate_nodes(shard_id bigint)
IS 'fetch set of candidate nodes for shard uploading in round-robin manner';
CREATE FUNCTION master_create_distributed_table(table_name regclass,
distribution_column text,
distribution_method citus.distribution_type)
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$master_create_distributed_table$$;
COMMENT ON FUNCTION master_create_distributed_table(table_name regclass,
distribution_column text,
distribution_method citus.distribution_type)
IS 'define the table distribution functions';
-- define shard creation function for hash-partitioned tables
CREATE FUNCTION master_create_worker_shards(table_name text, shard_count integer,
replication_factor integer DEFAULT 2)
RETURNS void
AS 'MODULE_PATHNAME'
LANGUAGE C STRICT;
/* task_tracker_* functions */
CREATE FUNCTION task_tracker_assign_task(bigint, integer, text)
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$task_tracker_assign_task$$;
COMMENT ON FUNCTION task_tracker_assign_task(bigint, integer, text)
IS 'assign a task to execute';
CREATE FUNCTION task_tracker_task_status(bigint, integer)
RETURNS integer
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$task_tracker_task_status$$;
COMMENT ON FUNCTION task_tracker_task_status(bigint, integer)
IS 'check an assigned task''s execution status';
CREATE FUNCTION task_tracker_cleanup_job(bigint)
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$task_tracker_cleanup_job$$;
COMMENT ON FUNCTION task_tracker_cleanup_job(bigint)
IS 'clean up all tasks associated with a job';
/* worker_* functions */
CREATE FUNCTION worker_fetch_partition_file(bigint, integer, integer, integer, text,
integer)
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_fetch_partition_file$$;
COMMENT ON FUNCTION worker_fetch_partition_file(bigint, integer, integer, integer, text,
integer)
IS 'fetch partition file from remote node';
CREATE FUNCTION worker_fetch_query_results_file(bigint, integer, integer, text, integer)
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_fetch_query_results_file$$;
COMMENT ON FUNCTION worker_fetch_query_results_file(bigint, integer, integer, text,
integer)
IS 'fetch query results file from remote node';
CREATE FUNCTION worker_fetch_foreign_file(text, bigint, text[], integer[])
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_fetch_foreign_file$$;
COMMENT ON FUNCTION worker_fetch_foreign_file(text, bigint, text[], integer[])
IS 'fetch foreign file from remote node and apply file';
CREATE FUNCTION worker_fetch_regular_table(text, bigint, text[], integer[])
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_fetch_regular_table$$;
COMMENT ON FUNCTION worker_fetch_regular_table(text, bigint, text[], integer[])
IS 'fetch PostgreSQL table from remote node';
CREATE FUNCTION worker_range_partition_table(bigint, integer, text, text, oid, anyarray)
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_range_partition_table$$;
COMMENT ON FUNCTION worker_range_partition_table(bigint, integer, text, text, oid,
anyarray)
IS 'range partition query results';
CREATE FUNCTION worker_hash_partition_table(bigint, integer, text, text, oid, integer)
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_hash_partition_table$$;
COMMENT ON FUNCTION worker_hash_partition_table(bigint, integer, text, text, oid,
integer)
IS 'hash partition query results';
CREATE FUNCTION worker_merge_files_into_table(bigint, integer, text[], text[])
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_merge_files_into_table$$;
COMMENT ON FUNCTION worker_merge_files_into_table(bigint, integer, text[], text[])
IS 'merge files into a table';
CREATE FUNCTION worker_merge_files_and_run_query(bigint, integer, text, text)
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_merge_files_and_run_query$$;
COMMENT ON FUNCTION worker_merge_files_and_run_query(bigint, integer, text, text)
IS 'merge files and run a reduce query on merged files';
CREATE FUNCTION worker_cleanup_job_schema_cache()
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_cleanup_job_schema_cache$$;
COMMENT ON FUNCTION worker_cleanup_job_schema_cache()
IS 'cleanup all job schemas in current database';
CREATE FUNCTION worker_foreign_file_path(text)
RETURNS text
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_foreign_file_path$$;
COMMENT ON FUNCTION worker_foreign_file_path(text)
IS 'get a foreign table''s local file path';
CREATE FUNCTION worker_find_block_local_path(bigint, text[])
RETURNS text
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_find_block_local_path$$;
COMMENT ON FUNCTION worker_find_block_local_path(bigint, text[])
IS 'find an HDFS block''s local file path';
CREATE FUNCTION worker_apply_shard_ddl_command(bigint, text)
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_apply_shard_ddl_command$$;
COMMENT ON FUNCTION worker_apply_shard_ddl_command(bigint, text)
IS 'extend ddl command with shardId and apply on database';
CREATE FUNCTION worker_append_table_to_shard(text, text, text, integer)
RETURNS void
LANGUAGE C STRICT
AS 'MODULE_PATHNAME', $$worker_append_table_to_shard$$;
COMMENT ON FUNCTION worker_append_table_to_shard(text, text, text, integer)
IS 'append a regular table''s contents to the shard';
/* trigger functions */
CREATE OR REPLACE FUNCTION citus_drop_trigger()
RETURNS event_trigger
LANGUAGE plpgsql
SET search_path = pg_catalog
/* declared as SECURITY DEFINER in upgrade script */
AS $cdbdt$
DECLARE v_obj record;
BEGIN
FOR v_obj IN SELECT * FROM pg_event_trigger_dropped_objects() LOOP
IF v_obj.object_type NOT IN ('table', 'foreign table') THEN
CONTINUE;
END IF;
-- nothing to do if not a distributed table
IF NOT EXISTS(SELECT * FROM pg_dist_partition WHERE logicalrelid = v_obj.objid) THEN
CONTINUE;
END IF;
-- ensure all shards are dropped
PERFORM master_drop_all_shards(v_obj.objid, v_obj.schema_name, v_obj.object_name);
-- delete partition entry
DELETE FROM pg_dist_partition WHERE logicalrelid = v_obj.objid;
END LOOP;
END;
$cdbdt$;
COMMENT ON FUNCTION citus_drop_trigger()
IS 'perform checks and actions at the end of DROP actions';
CREATE FUNCTION master_dist_partition_cache_invalidate()
RETURNS trigger
LANGUAGE C
AS 'MODULE_PATHNAME', $$master_dist_partition_cache_invalidate$$;
COMMENT ON FUNCTION master_dist_partition_cache_invalidate()
IS 'register relcache invalidation for changed rows';
CREATE FUNCTION master_dist_shard_cache_invalidate()
RETURNS trigger
LANGUAGE C
AS 'MODULE_PATHNAME', $$master_dist_shard_cache_invalidate$$;
COMMENT ON FUNCTION master_dist_shard_cache_invalidate()
IS 'register relcache invalidation for changed rows';
/* internal functions, not user accessible */
CREATE FUNCTION citus_extradata_container(INTERNAL)
RETURNS void
LANGUAGE C
AS 'MODULE_PATHNAME', $$citus_extradata_container$$;
COMMENT ON FUNCTION pg_catalog.citus_extradata_container(INTERNAL)
IS 'placeholder function to store additional data in postgres node trees';
/*****************************************************************************
* Citus triggers
*****************************************************************************/
CREATE EVENT TRIGGER citus_cascade_to_partition
ON SQL_DROP
EXECUTE PROCEDURE citus_drop_trigger();
CREATE TRIGGER dist_partition_cache_invalidate
AFTER INSERT OR UPDATE OR DELETE
ON pg_catalog.pg_dist_partition
FOR EACH ROW EXECUTE PROCEDURE master_dist_partition_cache_invalidate();
CREATE TRIGGER dist_shard_cache_invalidate
AFTER INSERT OR UPDATE OR DELETE
ON pg_catalog.pg_dist_shard
FOR EACH ROW EXECUTE PROCEDURE master_dist_shard_cache_invalidate();
/*****************************************************************************
* Citus aggregates
*****************************************************************************/
CREATE AGGREGATE array_cat_agg(anyarray) (SFUNC = array_cat, STYPE = anyarray);
COMMENT ON AGGREGATE array_cat_agg(anyarray)
IS 'concatenate input arrays into a single array';
/*
* Creates a temporary table exactly like the specified target table along with
* a trigger to redirect any INSERTed rows from the proxy to the underlying
* table. Users may optionally provide a sequence which will be incremented
* after each row that has been successfully proxied (useful for counting rows
* processed). Returns the name of the proxy table that was created.
*/
CREATE FUNCTION create_insert_proxy_for_table(target_table regclass,
sequence regclass DEFAULT NULL)
RETURNS text
AS $create_insert_proxy_for_table$
DECLARE
temp_table_name text;
attr_names text[];
attr_list text;
param_list text;
using_list text;
insert_command text;
-- templates to create dynamic functions, tables, and triggers
func_tmpl CONSTANT text := $$CREATE FUNCTION pg_temp.copy_to_insert()
RETURNS trigger
AS $copy_to_insert$
BEGIN
EXECUTE %L USING %s;
PERFORM nextval(%L);
RETURN NULL;
END;
$copy_to_insert$ LANGUAGE plpgsql;$$;
table_tmpl CONSTANT text := $$CREATE TEMPORARY TABLE %I
(LIKE %s INCLUDING DEFAULTS)$$;
trigger_tmpl CONSTANT text := $$CREATE TRIGGER copy_to_insert
BEFORE INSERT ON %s FOR EACH ROW
EXECUTE PROCEDURE pg_temp.copy_to_insert()$$;
BEGIN
-- create name of temporary table using unqualified input table name
SELECT format('%s_insert_proxy', relname)
INTO STRICT temp_table_name
FROM pg_class
WHERE oid = target_table;
-- get list of all attributes in table, we'll need shortly
SELECT array_agg(attname)
INTO STRICT attr_names
FROM pg_attribute
WHERE attrelid = target_table AND
attnum > 0 AND
NOT attisdropped;
-- build fully specified column list and USING clause from attr. names
SELECT string_agg(quote_ident(attr_name), ','),
string_agg(format('NEW.%I', attr_name), ',')
INTO STRICT attr_list,
using_list
FROM unnest(attr_names) AS attr_name;
-- build ($1, $2, $3)-style VALUE list to bind parameters
SELECT string_agg('$' || param_num, ',')
INTO STRICT param_list
FROM generate_series(1, array_length(attr_names, 1)) AS param_num;
-- use the above lists to generate appropriate INSERT command
insert_command = format('INSERT INTO %s (%s) VALUES (%s)', target_table,
attr_list, param_list);
-- use the command to make one-off trigger targeting specified table
EXECUTE format(func_tmpl, insert_command, using_list, sequence);
-- create a temporary table exactly like the target table...
EXECUTE format(table_tmpl, temp_table_name, target_table);
-- ... and install the trigger on that temporary table
EXECUTE format(trigger_tmpl, quote_ident(temp_table_name)::regclass);
RETURN temp_table_name;
END;
$create_insert_proxy_for_table$ LANGUAGE plpgsql SET search_path = 'pg_catalog';
COMMENT ON FUNCTION create_insert_proxy_for_table(regclass, regclass)
IS 'create a proxy table that redirects INSERTed rows to a target table';
-- define shard repair function
CREATE FUNCTION master_copy_shard_placement(shard_id bigint,
source_node_name text,
source_node_port integer,
target_node_name text,
target_node_port integer)
RETURNS void
AS 'MODULE_PATHNAME'
LANGUAGE C STRICT;
RESET search_path;
/* citus--5.0--5.0-1.sql */
CREATE FUNCTION pg_catalog.master_stage_shard_row(logicalrelid oid,
shardid bigint,
shardstorage "char",
shardminvalue text,
shardmaxvalue text)
RETURNS VOID
LANGUAGE C
AS 'MODULE_PATHNAME', $$master_stage_shard_row$$;
COMMENT ON FUNCTION pg_catalog.master_stage_shard_row(oid, bigint, "char", text, text)
IS 'deprecated function to insert a row into pg_dist_shard';
CREATE FUNCTION pg_catalog.master_stage_shard_placement_row(shardid int8,
shardstate int4,
shardlength int8,
nodename text,
nodeport int4)
RETURNS VOID
STRICT
LANGUAGE C
AS 'MODULE_PATHNAME', $$master_stage_shard_placement_row$$;
COMMENT ON FUNCTION pg_catalog.master_stage_shard_placement_row(int8, int4, int8, text, int4)
IS 'deprecated function to insert a row into pg_dist_shard_placement';
ALTER FUNCTION pg_catalog.citus_drop_trigger() SECURITY DEFINER;
GRANT SELECT ON pg_catalog.pg_dist_partition TO public;
GRANT SELECT ON pg_catalog.pg_dist_shard TO public;
GRANT SELECT ON pg_catalog.pg_dist_shard_placement TO public;
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