mirror of https://github.com/citusdata/citus.git
983 lines
44 KiB
Plaintext
983 lines
44 KiB
Plaintext
-- tests behaviour of INSERT INTO ... SELECT with repartitioning
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CREATE SCHEMA insert_select_repartition;
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SET search_path TO 'insert_select_repartition';
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SET citus.next_shard_id TO 4213581;
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SET citus.shard_replication_factor TO 1;
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SET citus.replication_model TO 'streaming';
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-- 4 shards, hash distributed.
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-- Negate distribution column value.
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SET citus.shard_count TO 4;
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CREATE TABLE source_table(a int);
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SELECT create_distributed_table('source_table', 'a');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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INSERT INTO source_table SELECT * FROM generate_series(1, 10);
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CREATE TABLE target_table(a int);
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SELECT create_distributed_table('target_table', 'a');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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SET client_min_messages TO DEBUG2;
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INSERT INTO target_table SELECT -a FROM source_table;
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DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
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DETAIL: Subquery contains an operator in the same position as the target table's partition column.
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HINT: Ensure the target table's partition column has a corresponding simple column reference to a distributed table's partition column in the subquery.
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: performing repartitioned INSERT ... SELECT
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DEBUG: partitioning SELECT query by column index 0 with name 'a'
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213585 AS citus_table_alias (a) SELECT a FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213583_to_0,repartitioned_results_xxxxx_from_4213584_to_0}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer)
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213586 AS citus_table_alias (a) SELECT a FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213582_to_1}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer)
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213587 AS citus_table_alias (a) SELECT a FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213581_to_2,repartitioned_results_xxxxx_from_4213582_to_2,repartitioned_results_xxxxx_from_4213584_to_2}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer)
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213588 AS citus_table_alias (a) SELECT a FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213581_to_3}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer)
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RESET client_min_messages;
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SELECT * FROM target_table WHERE a=-1 OR a=-3 OR a=-7 ORDER BY a;
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a
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---------------------------------------------------------------------
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-7
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-3
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-1
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(3 rows)
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DROP TABLE source_table, target_table;
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--
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-- range partitioning, composite distribution column
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--
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CREATE TYPE composite_key_type AS (f1 int, f2 text);
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-- source
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CREATE TABLE source_table(f1 int, key composite_key_type, value int, mapped_key composite_key_type);
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SELECT create_distributed_table('source_table', 'key', 'range');
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NOTICE: using statement-based replication
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DETAIL: Streaming replication is supported only for hash-distributed tables.
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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CALL public.create_range_partitioned_shards('source_table', '{"(0,a)","(25,a)"}','{"(24,z)","(49,z)"}');
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INSERT INTO source_table VALUES (0, (0, 'a'), 1, (0, 'a'));
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INSERT INTO source_table VALUES (1, (1, 'b'), 2, (26, 'b'));
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INSERT INTO source_table VALUES (2, (2, 'c'), 3, (3, 'c'));
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INSERT INTO source_table VALUES (3, (4, 'd'), 4, (27, 'd'));
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INSERT INTO source_table VALUES (4, (30, 'e'), 5, (30, 'e'));
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INSERT INTO source_table VALUES (5, (31, 'f'), 6, (31, 'f'));
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INSERT INTO source_table VALUES (6, (32, 'g'), 50, (8, 'g'));
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-- target
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CREATE TABLE target_table(f1 int DEFAULT 0, value int, key composite_key_type PRIMARY KEY);
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SELECT create_distributed_table('target_table', 'key', 'range');
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NOTICE: using statement-based replication
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DETAIL: Streaming replication is supported only for hash-distributed tables.
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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CALL public.create_range_partitioned_shards('target_table', '{"(0,a)","(25,a)"}','{"(24,z)","(49,z)"}');
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SET client_min_messages TO DEBUG2;
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INSERT INTO target_table SELECT f1, value, mapped_key FROM source_table;
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DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
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DETAIL: The target table's partition column should correspond to a partition column in the subquery.
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: performing repartitioned INSERT ... SELECT
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DEBUG: partitioning SELECT query by column index 2 with name 'key'
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213591 AS citus_table_alias (f1, value, key) SELECT f1, value, key FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213589_to_0,repartitioned_results_xxxxx_from_4213590_to_0}'::text[], 'text'::citus_copy_format) intermediate_result(f1 integer, value integer, key insert_select_repartition.composite_key_type)
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213592 AS citus_table_alias (f1, value, key) SELECT f1, value, key FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213589_to_1,repartitioned_results_xxxxx_from_4213590_to_1}'::text[], 'text'::citus_copy_format) intermediate_result(f1 integer, value integer, key insert_select_repartition.composite_key_type)
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RESET client_min_messages;
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SELECT * FROM target_table ORDER BY key;
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f1 | value | key
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---------------------------------------------------------------------
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0 | 1 | (0,a)
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2 | 3 | (3,c)
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6 | 50 | (8,g)
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1 | 2 | (26,b)
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3 | 4 | (27,d)
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4 | 5 | (30,e)
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5 | 6 | (31,f)
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(7 rows)
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SELECT * FROM target_table WHERE key = (26, 'b')::composite_key_type;
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f1 | value | key
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---------------------------------------------------------------------
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1 | 2 | (26,b)
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(1 row)
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-- with explicit column names
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TRUNCATE target_table;
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SET client_min_messages TO DEBUG2;
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INSERT INTO target_table(value, key) SELECT value, mapped_key FROM source_table;
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DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
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DETAIL: The target table's partition column should correspond to a partition column in the subquery.
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: performing repartitioned INSERT ... SELECT
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DEBUG: partitioning SELECT query by column index 2 with name 'key'
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213591 AS citus_table_alias (f1, value, key) SELECT f1, value, key FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213589_to_0,repartitioned_results_xxxxx_from_4213590_to_0}'::text[], 'text'::citus_copy_format) intermediate_result(f1 integer, value integer, key insert_select_repartition.composite_key_type)
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213592 AS citus_table_alias (f1, value, key) SELECT f1, value, key FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213589_to_1,repartitioned_results_xxxxx_from_4213590_to_1}'::text[], 'text'::citus_copy_format) intermediate_result(f1 integer, value integer, key insert_select_repartition.composite_key_type)
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RESET client_min_messages;
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SELECT * FROM target_table ORDER BY key;
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f1 | value | key
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---------------------------------------------------------------------
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0 | 1 | (0,a)
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0 | 3 | (3,c)
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0 | 50 | (8,g)
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0 | 2 | (26,b)
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0 | 4 | (27,d)
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0 | 5 | (30,e)
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0 | 6 | (31,f)
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(7 rows)
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-- missing value for a column
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TRUNCATE target_table;
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SET client_min_messages TO DEBUG2;
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INSERT INTO target_table(key) SELECT mapped_key AS key_renamed FROM source_table;
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DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
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DETAIL: The target table's partition column should correspond to a partition column in the subquery.
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: performing repartitioned INSERT ... SELECT
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DEBUG: partitioning SELECT query by column index 1 with name 'key'
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213591 AS citus_table_alias (f1, key) SELECT f1, key FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213589_to_0,repartitioned_results_xxxxx_from_4213590_to_0}'::text[], 'text'::citus_copy_format) intermediate_result(f1 integer, key insert_select_repartition.composite_key_type)
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213592 AS citus_table_alias (f1, key) SELECT f1, key FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213589_to_1,repartitioned_results_xxxxx_from_4213590_to_1}'::text[], 'text'::citus_copy_format) intermediate_result(f1 integer, key insert_select_repartition.composite_key_type)
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RESET client_min_messages;
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SELECT * FROM target_table ORDER BY key;
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f1 | value | key
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---------------------------------------------------------------------
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0 | | (0,a)
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0 | | (3,c)
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0 | | (8,g)
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0 | | (26,b)
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0 | | (27,d)
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0 | | (30,e)
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0 | | (31,f)
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(7 rows)
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-- ON CONFLICT
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SET client_min_messages TO DEBUG2;
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INSERT INTO target_table(key)
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SELECT mapped_key AS key_renamed FROM source_table
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WHERE (mapped_key).f1 % 2 = 1
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ON CONFLICT (key) DO UPDATE SET f1=1;
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DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
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DETAIL: The target table's partition column should correspond to a partition column in the subquery.
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: performing repartitioned INSERT ... SELECT
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DEBUG: partitioning SELECT query by column index 1 with name 'key'
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213591 AS citus_table_alias (f1, key) SELECT f1, key FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213589_to_0}'::text[], 'text'::citus_copy_format) intermediate_result(f1 integer, key insert_select_repartition.composite_key_type) ON CONFLICT(key) DO UPDATE SET f1 = 1
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213592 AS citus_table_alias (f1, key) SELECT f1, key FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213589_to_1,repartitioned_results_xxxxx_from_4213590_to_1}'::text[], 'text'::citus_copy_format) intermediate_result(f1 integer, key insert_select_repartition.composite_key_type) ON CONFLICT(key) DO UPDATE SET f1 = 1
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RESET client_min_messages;
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SELECT * FROM target_table ORDER BY key;
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f1 | value | key
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---------------------------------------------------------------------
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0 | | (0,a)
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1 | | (3,c)
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0 | | (8,g)
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0 | | (26,b)
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1 | | (27,d)
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0 | | (30,e)
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1 | | (31,f)
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(7 rows)
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-- missing value for distribution column
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INSERT INTO target_table(value) SELECT value FROM source_table;
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ERROR: the partition column of table insert_select_repartition.target_table should have a value
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DROP TABLE source_table, target_table;
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-- different column types
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-- verifies that we add necessary casts, otherwise even shard routing won't
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-- work correctly and we will see 2 values for the same primary key.
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CREATE TABLE target_table(col_1 int primary key, col_2 int);
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SELECT create_distributed_table('target_table','col_1');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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INSERT INTO target_table VALUES (1,2), (2,3), (3,4), (4,5), (5,6);
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CREATE TABLE source_table(col_1 numeric, col_2 numeric, col_3 numeric);
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SELECT create_distributed_table('source_table','col_1');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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INSERT INTO source_table VALUES (1,1,1), (3,3,3), (5,5,5);
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SET client_min_messages TO DEBUG2;
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INSERT INTO target_table
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SELECT
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col_1, col_2
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FROM
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source_table
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ON CONFLICT(col_1) DO UPDATE SET col_2 = EXCLUDED.col_2;
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DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
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DETAIL: The data type of the target table's partition column should exactly match the data type of the corresponding simple column reference in the subquery.
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: performing repartitioned INSERT ... SELECT
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DEBUG: partitioning SELECT query by column index 0 with name 'col_1'
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213593 AS citus_table_alias (col_1, col_2) SELECT col_1, col_2 FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213597_to_0,repartitioned_results_xxxxx_from_4213600_to_0}'::text[], 'binary'::citus_copy_format) intermediate_result(col_1 integer, col_2 integer) ON CONFLICT(col_1) DO UPDATE SET col_2 = excluded.col_2
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DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213594 AS citus_table_alias (col_1, col_2) SELECT col_1, col_2 FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213599_to_1}'::text[], 'binary'::citus_copy_format) intermediate_result(col_1 integer, col_2 integer) ON CONFLICT(col_1) DO UPDATE SET col_2 = excluded.col_2
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RESET client_min_messages;
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SELECT * FROM target_table ORDER BY 1;
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col_1 | col_2
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---------------------------------------------------------------------
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1 | 1
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2 | 3
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3 | 3
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4 | 5
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5 | 5
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(5 rows)
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DROP TABLE source_table, target_table;
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--
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-- array coercion
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--
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SET citus.shard_count TO 3;
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CREATE TABLE source_table(a int, mapped_key int, c float[]);
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SELECT create_distributed_table('source_table', 'a');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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INSERT INTO source_table VALUES (1, -1, ARRAY[1.1, 2.2, 3.3]), (2, -2, ARRAY[4.5, 5.8]),
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(3, -3, ARRAY[]::float[]), (4, -4, ARRAY[3.3]);
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SET citus.shard_count TO 2;
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CREATE TABLE target_table(a int, b int[]);
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SELECT create_distributed_table('target_table', 'a');
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create_distributed_table
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---------------------------------------------------------------------
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(1 row)
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SET client_min_messages TO DEBUG1;
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INSERT INTO target_table SELECT mapped_key, c FROM source_table;
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DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
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DETAIL: The target table's partition column should correspond to a partition column in the subquery.
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DEBUG: performing repartitioned INSERT ... SELECT
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RESET client_min_messages;
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SELECT * FROM target_table ORDER BY a;
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a | b
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---------------------------------------------------------------------
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-4 | {3}
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-3 | {}
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-2 | {4,6}
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-1 | {1,2,3}
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(4 rows)
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--
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-- worker queries can have more columns than necessary. ExpandWorkerTargetEntry()
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-- might add additional columns to the target list.
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--
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TRUNCATE target_table;
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\set VERBOSITY TERSE
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-- first verify that the SELECT query below fetches 3 projected columns from workers
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SET citus.log_remote_commands TO true; SET client_min_messages TO DEBUG;
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CREATE TABLE results AS SELECT max(-a), array_agg(mapped_key) FROM source_table GROUP BY a;
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DEBUG: Router planner cannot handle multi-shard select queries
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DEBUG: building index "pg_toast_xxxxx_index" on table "pg_toast_xxxxx" serially
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NOTICE: issuing SELECT max((OPERATOR(pg_catalog.-) a)) AS max, array_agg(mapped_key) AS array_agg, a AS worker_column_3 FROM insert_select_repartition.source_table_4213601 source_table WHERE true GROUP BY a
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NOTICE: issuing SELECT max((OPERATOR(pg_catalog.-) a)) AS max, array_agg(mapped_key) AS array_agg, a AS worker_column_3 FROM insert_select_repartition.source_table_4213602 source_table WHERE true GROUP BY a
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NOTICE: issuing SELECT max((OPERATOR(pg_catalog.-) a)) AS max, array_agg(mapped_key) AS array_agg, a AS worker_column_3 FROM insert_select_repartition.source_table_4213603 source_table WHERE true GROUP BY a
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RESET citus.log_remote_commands; RESET client_min_messages;
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DROP TABLE results;
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-- now verify that we don't write the extra columns to the intermediate result files and
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-- insertion to the target works fine.
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SET client_min_messages TO DEBUG1;
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INSERT INTO target_table SELECT max(-a), array_agg(mapped_key) FROM source_table GROUP BY a;
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DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
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DEBUG: performing repartitioned INSERT ... SELECT
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RESET client_min_messages;
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SELECT * FROM target_table ORDER BY a;
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a | b
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---------------------------------------------------------------------
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-4 | {-4}
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-3 | {-3}
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-2 | {-2}
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-1 | {-1}
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(4 rows)
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--
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-- repartitioned INSERT/SELECT followed/preceded by other DML in same transaction
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--
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-- case 1. followed by DELETE
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TRUNCATE target_table;
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BEGIN;
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INSERT INTO target_table SELECT mapped_key, c FROM source_table;
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SELECT * FROM target_table ORDER BY a;
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a | b
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---------------------------------------------------------------------
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-4 | {3}
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-3 | {}
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-2 | {4,6}
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-1 | {1,2,3}
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(4 rows)
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DELETE FROM target_table;
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END;
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SELECT * FROM target_table ORDER BY a;
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a | b
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---------------------------------------------------------------------
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(0 rows)
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-- case 2. followed by UPDATE
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TRUNCATE target_table;
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BEGIN;
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INSERT INTO target_table SELECT mapped_key, c FROM source_table;
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SELECT * FROM target_table ORDER BY a;
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a | b
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---------------------------------------------------------------------
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-4 | {3}
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-3 | {}
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-2 | {4,6}
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-1 | {1,2,3}
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(4 rows)
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UPDATE target_table SET b=array_append(b, a);
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END;
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SELECT * FROM target_table ORDER BY a;
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a | b
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---------------------------------------------------------------------
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-4 | {3,-4}
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-3 | {-3}
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-2 | {4,6,-2}
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-1 | {1,2,3,-1}
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(4 rows)
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-- case 3. followed by multi-row INSERT
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TRUNCATE target_table;
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BEGIN;
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INSERT INTO target_table SELECT mapped_key, c FROM source_table;
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SELECT * FROM target_table ORDER BY a;
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a | b
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---------------------------------------------------------------------
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-4 | {3}
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-3 | {}
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-2 | {4,6}
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-1 | {1,2,3}
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(4 rows)
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INSERT INTO target_table VALUES (-5, ARRAY[10,11]), (-6, ARRAY[11,12]), (-7, ARRAY[999]);
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END;
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SELECT * FROM target_table ORDER BY a;
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a | b
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---------------------------------------------------------------------
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-7 | {999}
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-6 | {11,12}
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-5 | {10,11}
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-4 | {3}
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-3 | {}
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-2 | {4,6}
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-1 | {1,2,3}
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(7 rows)
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-- case 4. followed by distributed INSERT/SELECT
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TRUNCATE target_table;
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BEGIN;
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INSERT INTO target_table SELECT mapped_key, c FROM source_table;
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SELECT * FROM target_table ORDER BY a;
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a | b
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---------------------------------------------------------------------
|
|
-4 | {3}
|
|
-3 | {}
|
|
-2 | {4,6}
|
|
-1 | {1,2,3}
|
|
(4 rows)
|
|
|
|
INSERT INTO target_table SELECT * FROM target_table;
|
|
END;
|
|
SELECT * FROM target_table ORDER BY a;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
-4 | {3}
|
|
-4 | {3}
|
|
-3 | {}
|
|
-3 | {}
|
|
-2 | {4,6}
|
|
-2 | {4,6}
|
|
-1 | {1,2,3}
|
|
-1 | {1,2,3}
|
|
(8 rows)
|
|
|
|
-- case 5. preceded by DELETE
|
|
TRUNCATE target_table;
|
|
BEGIN;
|
|
DELETE FROM target_table;
|
|
INSERT INTO target_table SELECT mapped_key, c FROM source_table;
|
|
END;
|
|
SELECT * FROM target_table ORDER BY a;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
-4 | {3}
|
|
-3 | {}
|
|
-2 | {4,6}
|
|
-1 | {1,2,3}
|
|
(4 rows)
|
|
|
|
-- case 6. preceded by UPDATE
|
|
TRUNCATE target_table;
|
|
BEGIN;
|
|
UPDATE target_table SET b=array_append(b, a);
|
|
INSERT INTO target_table SELECT mapped_key, c FROM source_table;
|
|
END;
|
|
SELECT * FROM target_table ORDER BY a;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
-4 | {3}
|
|
-3 | {}
|
|
-2 | {4,6}
|
|
-1 | {1,2,3}
|
|
(4 rows)
|
|
|
|
-- case 7. preceded by multi-row INSERT
|
|
TRUNCATE target_table;
|
|
BEGIN;
|
|
INSERT INTO target_table VALUES (-5, ARRAY[10,11]), (-6, ARRAY[11,12]), (-7, ARRAY[999]);
|
|
INSERT INTO target_table SELECT mapped_key, c FROM source_table;
|
|
END;
|
|
SELECT * FROM target_table ORDER BY a;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
-7 | {999}
|
|
-6 | {11,12}
|
|
-5 | {10,11}
|
|
-4 | {3}
|
|
-3 | {}
|
|
-2 | {4,6}
|
|
-1 | {1,2,3}
|
|
(7 rows)
|
|
|
|
-- case 8. preceded by distributed INSERT/SELECT
|
|
TRUNCATE target_table;
|
|
INSERT INTO target_table SELECT mapped_key, c FROM source_table;
|
|
BEGIN;
|
|
INSERT INTO target_table SELECT * FROM target_table;
|
|
INSERT INTO target_table SELECT mapped_key, c FROM source_table;
|
|
END;
|
|
SELECT * FROM target_table ORDER BY a;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
-4 | {3}
|
|
-4 | {3}
|
|
-4 | {3}
|
|
-3 | {}
|
|
-3 | {}
|
|
-3 | {}
|
|
-2 | {4,6}
|
|
-2 | {4,6}
|
|
-2 | {4,6}
|
|
-1 | {1,2,3}
|
|
-1 | {1,2,3}
|
|
-1 | {1,2,3}
|
|
(12 rows)
|
|
|
|
--
|
|
-- repartitioned INSERT/SELECT with RETURNING
|
|
--
|
|
TRUNCATE target_table;
|
|
SET client_min_messages TO DEBUG1;
|
|
WITH c AS (
|
|
INSERT INTO target_table
|
|
SELECT mapped_key, c FROM source_table
|
|
RETURNING *)
|
|
SELECT * FROM c ORDER by a;
|
|
DEBUG: generating subplan XXX_1 for CTE c: INSERT INTO insert_select_repartition.target_table (a, b) SELECT mapped_key, c FROM insert_select_repartition.source_table RETURNING target_table.a, target_table.b
|
|
DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
|
|
DEBUG: Plan XXX query after replacing subqueries and CTEs: SELECT a, b FROM (SELECT intermediate_result.a, intermediate_result.b FROM read_intermediate_result('XXX_1'::text, 'binary'::citus_copy_format) intermediate_result(a integer, b integer[])) c ORDER BY a
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
-4 | {3}
|
|
-3 | {}
|
|
-2 | {4,6}
|
|
-1 | {1,2,3}
|
|
(4 rows)
|
|
|
|
RESET client_min_messages;
|
|
--
|
|
-- in combination with CTEs
|
|
--
|
|
TRUNCATE target_table;
|
|
SET client_min_messages TO DEBUG1;
|
|
WITH t AS (
|
|
SELECT mapped_key, a, c FROM source_table
|
|
WHERE a > floor(random())
|
|
)
|
|
INSERT INTO target_table
|
|
SELECT mapped_key, c FROM t NATURAL JOIN source_table;
|
|
DEBUG: volatile functions are not allowed in distributed INSERT ... SELECT queries
|
|
DEBUG: generating subplan XXX_1 for CTE t: SELECT mapped_key, a, c FROM insert_select_repartition.source_table WHERE ((a)::double precision OPERATOR(pg_catalog.>) floor(random()))
|
|
DEBUG: Plan XXX query after replacing subqueries and CTEs: SELECT mapped_key AS a, (c)::integer[] AS b FROM (SELECT t.mapped_key, t.c FROM ((SELECT intermediate_result.mapped_key, intermediate_result.a, intermediate_result.c FROM read_intermediate_result('XXX_1'::text, 'binary'::citus_copy_format) intermediate_result(mapped_key integer, a integer, c double precision[])) t JOIN insert_select_repartition.source_table USING (mapped_key, a, c))) citus_insert_select_subquery
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
RESET client_min_messages;
|
|
SELECT * FROM target_table ORDER BY a;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
-4 | {3}
|
|
-3 | {}
|
|
-2 | {4,6}
|
|
-1 | {1,2,3}
|
|
(4 rows)
|
|
|
|
DROP TABLE source_table, target_table;
|
|
--
|
|
-- The case where select query has a GROUP BY ...
|
|
--
|
|
SET citus.shard_count TO 4;
|
|
CREATE TABLE source_table(a int, b int);
|
|
SELECT create_distributed_table('source_table', 'a');
|
|
create_distributed_table
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SET citus.shard_count TO 3;
|
|
CREATE TABLE target_table(a int, b int);
|
|
SELECT create_distributed_table('target_table', 'a');
|
|
create_distributed_table
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
INSERT INTO source_table SELECT floor(i/4), i*i FROM generate_series(1, 20) i;
|
|
SET client_min_messages TO DEBUG1;
|
|
INSERT INTO target_table SELECT a, max(b) FROM source_table GROUP BY a;
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
RESET client_min_messages;
|
|
SELECT * FROM target_table ORDER BY a;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
0 | 9
|
|
1 | 49
|
|
2 | 121
|
|
3 | 225
|
|
4 | 361
|
|
5 | 400
|
|
(6 rows)
|
|
|
|
--
|
|
-- EXPLAIN output should specify repartitioned INSERT/SELECT
|
|
--
|
|
EXPLAIN INSERT INTO target_table SELECT a, max(b) FROM source_table GROUP BY a;
|
|
QUERY PLAN
|
|
---------------------------------------------------------------------
|
|
Custom Scan (Citus INSERT ... SELECT) (cost=0.00..0.00 rows=0 width=0)
|
|
INSERT/SELECT method: repartition
|
|
-> Custom Scan (Citus Adaptive) (cost=0.00..0.00 rows=0 width=0)
|
|
Task Count: 4
|
|
Tasks Shown: One of 4
|
|
-> Task
|
|
Node: host=localhost port=xxxxx dbname=regression
|
|
-> HashAggregate (cost=43.90..45.90 rows=200 width=8)
|
|
Group Key: a
|
|
-> Seq Scan on source_table_4213606 source_table (cost=0.00..32.60 rows=2260 width=8)
|
|
(10 rows)
|
|
|
|
--
|
|
-- Duplicate names in target list
|
|
--
|
|
TRUNCATE target_table;
|
|
SET client_min_messages TO DEBUG2;
|
|
INSERT INTO target_table
|
|
SELECT max(b), max(b) FROM source_table GROUP BY a;
|
|
DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
|
|
DEBUG: Router planner cannot handle multi-shard select queries
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
DEBUG: partitioning SELECT query by column index 0 with name 'a'
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213610 AS citus_table_alias (a, b) SELECT a, b FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213606_to_0,repartitioned_results_xxxxx_from_4213607_to_0}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer)
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213611 AS citus_table_alias (a, b) SELECT a, b FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213607_to_1,repartitioned_results_xxxxx_from_4213609_to_1}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer)
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213612 AS citus_table_alias (a, b) SELECT a, b FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213606_to_2,repartitioned_results_xxxxx_from_4213607_to_2}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer)
|
|
RESET client_min_messages;
|
|
SELECT * FROM target_table ORDER BY a;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
9 | 9
|
|
49 | 49
|
|
121 | 121
|
|
225 | 225
|
|
361 | 361
|
|
400 | 400
|
|
(6 rows)
|
|
|
|
--
|
|
-- Prepared INSERT/SELECT
|
|
--
|
|
TRUNCATE target_table;
|
|
PREPARE insert_plan(int, int) AS
|
|
INSERT INTO target_table
|
|
SELECT a, max(b) FROM source_table
|
|
WHERE a BETWEEN $1 AND $2 GROUP BY a;
|
|
SET client_min_messages TO DEBUG1;
|
|
EXECUTE insert_plan(0, 2);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(0, 2);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(0, 2);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(0, 2);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(0, 2);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(0, 2);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(2, 4);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(2, 4);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(2, 4);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(2, 4);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(2, 4);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
EXECUTE insert_plan(2, 4);
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
RESET client_min_messages;
|
|
SELECT a, count(*), count(distinct b) distinct_values FROM target_table GROUP BY a ORDER BY a;
|
|
a | count | distinct_values
|
|
---------------------------------------------------------------------
|
|
0 | 6 | 1
|
|
1 | 6 | 1
|
|
2 | 12 | 1
|
|
3 | 6 | 1
|
|
4 | 6 | 1
|
|
(5 rows)
|
|
|
|
--
|
|
-- INSERT/SELECT in CTE
|
|
--
|
|
TRUNCATE target_table;
|
|
SET client_min_messages TO DEBUG2;
|
|
WITH r AS (
|
|
INSERT INTO target_table SELECT * FROM source_table RETURNING *
|
|
)
|
|
INSERT INTO target_table SELECT source_table.a, max(source_table.b) FROM source_table NATURAL JOIN r GROUP BY source_table.a;
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: data-modifying statements are not supported in the WITH clauses of distributed queries
|
|
DEBUG: generating subplan XXX_1 for CTE r: INSERT INTO insert_select_repartition.target_table (a, b) SELECT a, b FROM insert_select_repartition.source_table RETURNING target_table.a, target_table.b
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: Plan XXX query after replacing subqueries and CTEs: SELECT a, max AS b FROM (SELECT source_table.a, max(source_table.b) AS max FROM (insert_select_repartition.source_table JOIN (SELECT intermediate_result.a, intermediate_result.b FROM read_intermediate_result('XXX_1'::text, 'binary'::citus_copy_format) intermediate_result(a integer, b integer)) r USING (a, b)) GROUP BY source_table.a) citus_insert_select_subquery
|
|
DEBUG: Router planner cannot handle multi-shard select queries
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
DEBUG: Router planner cannot handle multi-shard select queries
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
DEBUG: partitioning SELECT query by column index 0 with name 'a'
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213610 AS citus_table_alias (a, b) SELECT a, b FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213606_to_0,repartitioned_results_xxxxx_from_4213607_to_0}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer) RETURNING citus_table_alias.a, citus_table_alias.b
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213611 AS citus_table_alias (a, b) SELECT a, b FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213607_to_1}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer) RETURNING citus_table_alias.a, citus_table_alias.b
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213612 AS citus_table_alias (a, b) SELECT a, b FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213609_to_2}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer) RETURNING citus_table_alias.a, citus_table_alias.b
|
|
DEBUG: partitioning SELECT query by column index 0 with name 'a'
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213610 AS citus_table_alias (a, b) SELECT a, b FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213606_to_0,repartitioned_results_xxxxx_from_4213607_to_0}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer)
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213611 AS citus_table_alias (a, b) SELECT a, b FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213607_to_1}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer)
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213612 AS citus_table_alias (a, b) SELECT a, b FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213609_to_2}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer)
|
|
RESET client_min_messages;
|
|
SELECT * FROM target_table ORDER BY a, b;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
0 | 1
|
|
0 | 4
|
|
0 | 9
|
|
0 | 9
|
|
1 | 16
|
|
1 | 25
|
|
1 | 36
|
|
1 | 49
|
|
1 | 49
|
|
2 | 64
|
|
2 | 81
|
|
2 | 100
|
|
2 | 121
|
|
2 | 121
|
|
3 | 144
|
|
3 | 169
|
|
3 | 196
|
|
3 | 225
|
|
3 | 225
|
|
4 | 256
|
|
4 | 289
|
|
4 | 324
|
|
4 | 361
|
|
4 | 361
|
|
5 | 400
|
|
5 | 400
|
|
(26 rows)
|
|
|
|
DROP TABLE source_table, target_table;
|
|
--
|
|
-- Constraint failure and rollback
|
|
--
|
|
SET citus.shard_count TO 4;
|
|
CREATE TABLE source_table(a int, b int);
|
|
SELECT create_distributed_table('source_table', 'a');
|
|
create_distributed_table
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
INSERT INTO source_table SELECT i, i * i FROM generate_series(1, 10) i;
|
|
UPDATE source_table SET b = NULL where b IN (9, 4);
|
|
SET citus.shard_replication_factor TO 2;
|
|
CREATE TABLE target_table(a int, b int not null);
|
|
SELECT create_distributed_table('target_table', 'a', 'range');
|
|
NOTICE: using statement-based replication
|
|
create_distributed_table
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
CALL public.create_range_partitioned_shards('target_table', '{0,3,6,9}','{2,5,8,50}');
|
|
INSERT INTO target_table VALUES (11,9), (22,4);
|
|
EXPLAIN (costs off) INSERT INTO target_table SELECT * FROM source_table;
|
|
QUERY PLAN
|
|
---------------------------------------------------------------------
|
|
Custom Scan (Citus INSERT ... SELECT)
|
|
INSERT/SELECT method: repartition
|
|
-> Custom Scan (Citus Adaptive)
|
|
Task Count: 4
|
|
Tasks Shown: One of 4
|
|
-> Task
|
|
Node: host=localhost port=xxxxx dbname=regression
|
|
-> Seq Scan on source_table_4213613 source_table
|
|
(8 rows)
|
|
|
|
EXPLAIN (costs off) INSERT INTO target_table SELECT * FROM source_table WHERE b IS NOT NULL;
|
|
QUERY PLAN
|
|
---------------------------------------------------------------------
|
|
Custom Scan (Citus INSERT ... SELECT)
|
|
INSERT/SELECT method: repartition
|
|
-> Custom Scan (Citus Adaptive)
|
|
Task Count: 4
|
|
Tasks Shown: One of 4
|
|
-> Task
|
|
Node: host=localhost port=xxxxx dbname=regression
|
|
-> Seq Scan on source_table_4213613 source_table
|
|
Filter: (b IS NOT NULL)
|
|
(9 rows)
|
|
|
|
BEGIN;
|
|
SAVEPOINT s1;
|
|
INSERT INTO target_table SELECT * FROM source_table;
|
|
ERROR: null value in column "b" violates not-null constraint
|
|
ROLLBACK TO SAVEPOINT s1;
|
|
INSERT INTO target_table SELECT * FROM source_table WHERE b IS NOT NULL;
|
|
END;
|
|
SELECT * FROM target_table ORDER BY b;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
1 | 1
|
|
22 | 4
|
|
11 | 9
|
|
4 | 16
|
|
5 | 25
|
|
6 | 36
|
|
7 | 49
|
|
8 | 64
|
|
9 | 81
|
|
10 | 100
|
|
(10 rows)
|
|
|
|
-- verify that values have been replicated to both replicas
|
|
SELECT * FROM run_command_on_placements('target_table', 'select count(*) from %s') ORDER BY shardid, nodeport;
|
|
nodename | nodeport | shardid | success | result
|
|
---------------------------------------------------------------------
|
|
localhost | 57637 | 4213617 | t | 1
|
|
localhost | 57638 | 4213617 | t | 1
|
|
localhost | 57637 | 4213618 | t | 2
|
|
localhost | 57638 | 4213618 | t | 2
|
|
localhost | 57637 | 4213619 | t | 3
|
|
localhost | 57638 | 4213619 | t | 3
|
|
localhost | 57637 | 4213620 | t | 4
|
|
localhost | 57638 | 4213620 | t | 4
|
|
(8 rows)
|
|
|
|
--
|
|
-- Multiple casts in the SELECT query
|
|
--
|
|
TRUNCATE target_table;
|
|
SET client_min_messages TO DEBUG2;
|
|
INSERT INTO target_table SELECT 1.12, b::bigint FROM source_table WHERE b IS NOT NULL;
|
|
DEBUG: cannot perform distributed INSERT INTO ... SELECT because the partition columns in the source table and subquery do not match
|
|
DEBUG: Router planner cannot handle multi-shard select queries
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
DEBUG: partitioning SELECT query by column index 0 with name 'a'
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213617 AS citus_table_alias (a, b) SELECT a, b FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213613_to_0,repartitioned_results_xxxxx_from_4213614_to_0,repartitioned_results_xxxxx_from_4213615_to_0,repartitioned_results_xxxxx_from_4213616_to_0}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer)
|
|
RESET client_min_messages;
|
|
SELECT * FROM target_table ORDER BY a, b;
|
|
a | b
|
|
---------------------------------------------------------------------
|
|
1 | 1
|
|
1 | 16
|
|
1 | 25
|
|
1 | 36
|
|
1 | 49
|
|
1 | 64
|
|
1 | 81
|
|
1 | 100
|
|
(8 rows)
|
|
|
|
--
|
|
-- ROLLBACK after out of range error
|
|
--
|
|
TRUNCATE target_table;
|
|
BEGIN;
|
|
INSERT INTO target_table SELECT a * 10, b FROM source_table WHERE b IS NOT NULL;
|
|
ERROR: could not find shard for partition column value
|
|
END;
|
|
SELECT max(result) FROM run_command_on_placements('target_table', 'select count(*) from %s');
|
|
max
|
|
---------------------------------------------------------------------
|
|
0
|
|
(1 row)
|
|
|
|
DROP TABLE source_table, target_table;
|
|
--
|
|
-- Range partitioned target's ranges doesn't cover the whole range
|
|
--
|
|
SET citus.shard_replication_factor TO 2;
|
|
SET citus.replication_model TO 'statement';
|
|
SET citus.shard_count TO 4;
|
|
CREATE TABLE source_table(a int, b int);
|
|
SELECT create_distributed_table('source_table', 'a');
|
|
create_distributed_table
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
INSERT INTO source_table SELECT i, i * i FROM generate_series(1, 10) i;
|
|
SET citus.shard_replication_factor TO 2;
|
|
CREATE TABLE target_table(b int not null, a float);
|
|
SELECT create_distributed_table('target_table', 'a', 'range');
|
|
create_distributed_table
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
CALL public.create_range_partitioned_shards('target_table', '{0.0,3.5,6.5,9.5}','{2.9,5.9,8.9,50.0}');
|
|
INSERT INTO target_table SELECT b, a+0.6 FROM source_table;
|
|
SELECT * FROM target_table ORDER BY a;
|
|
b | a
|
|
---------------------------------------------------------------------
|
|
1 | 1.6
|
|
4 | 2.6
|
|
9 | 3.6
|
|
16 | 4.6
|
|
25 | 5.6
|
|
36 | 6.6
|
|
49 | 7.6
|
|
64 | 8.6
|
|
81 | 9.6
|
|
100 | 10.6
|
|
(10 rows)
|
|
|
|
-- verify that values have been replicated to both replicas, and that each
|
|
-- replica has received correct number of rows
|
|
SELECT * FROM run_command_on_placements('target_table', 'select count(*) from %s') ORDER BY shardid, nodeport;
|
|
nodename | nodeport | shardid | success | result
|
|
---------------------------------------------------------------------
|
|
localhost | 57637 | 4213625 | t | 2
|
|
localhost | 57638 | 4213625 | t | 2
|
|
localhost | 57637 | 4213626 | t | 3
|
|
localhost | 57638 | 4213626 | t | 3
|
|
localhost | 57637 | 4213627 | t | 3
|
|
localhost | 57638 | 4213627 | t | 3
|
|
localhost | 57637 | 4213628 | t | 2
|
|
localhost | 57638 | 4213628 | t | 2
|
|
(8 rows)
|
|
|
|
DROP TABLE source_table, target_table;
|
|
--
|
|
-- Select column names should be unique
|
|
--
|
|
SET citus.shard_replication_factor TO 1;
|
|
SET citus.shard_count TO 4;
|
|
CREATE TABLE source_table(a int, b int);
|
|
SELECT create_distributed_table('source_table', 'a');
|
|
create_distributed_table
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
SET citus.shard_count TO 3;
|
|
CREATE TABLE target_table(a int, b int, c int, d int, e int, f int);
|
|
SELECT create_distributed_table('target_table', 'a');
|
|
create_distributed_table
|
|
---------------------------------------------------------------------
|
|
|
|
(1 row)
|
|
|
|
INSERT INTO source_table SELECT i, i * i FROM generate_series(1, 10) i;
|
|
SET client_min_messages TO DEBUG2;
|
|
INSERT INTO target_table SELECT a AS aa, b AS aa, 1 AS aa, 2 AS aa FROM source_table;
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: Router planner cannot handle multi-shard select queries
|
|
DEBUG: performing repartitioned INSERT ... SELECT
|
|
DEBUG: partitioning SELECT query by column index 0 with name 'a'
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213633 AS citus_table_alias (a, b, c, d) SELECT a, b, c, d FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213629_to_0,repartitioned_results_xxxxx_from_4213630_to_0}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer, c integer, d integer)
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213634 AS citus_table_alias (a, b, c, d) SELECT a, b, c, d FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213630_to_1,repartitioned_results_xxxxx_from_4213631_to_1}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer, c integer, d integer)
|
|
DEBUG: distributed statement: INSERT INTO insert_select_repartition.target_table_4213635 AS citus_table_alias (a, b, c, d) SELECT a, b, c, d FROM read_intermediate_results('{repartitioned_results_xxxxx_from_4213632_to_2}'::text[], 'binary'::citus_copy_format) intermediate_result(a integer, b integer, c integer, d integer)
|
|
RESET client_min_messages;
|
|
SELECT count(*) FROM target_table;
|
|
count
|
|
---------------------------------------------------------------------
|
|
10
|
|
(1 row)
|
|
|
|
--
|
|
-- Disable repartitioned insert/select
|
|
--
|
|
TRUNCATE target_table;
|
|
SET citus.enable_repartitioned_insert_select TO OFF;
|
|
EXPLAIN (costs off) INSERT INTO target_table SELECT a AS aa, b AS aa, 1 AS aa, 2 AS aa FROM source_table;
|
|
QUERY PLAN
|
|
---------------------------------------------------------------------
|
|
Custom Scan (Citus INSERT ... SELECT)
|
|
INSERT/SELECT method: pull to coordinator
|
|
-> Custom Scan (Citus Adaptive)
|
|
Task Count: 4
|
|
Tasks Shown: One of 4
|
|
-> Task
|
|
Node: host=localhost port=xxxxx dbname=regression
|
|
-> Seq Scan on source_table_4213629 source_table
|
|
(8 rows)
|
|
|
|
SET client_min_messages TO DEBUG2;
|
|
INSERT INTO target_table SELECT a AS aa, b AS aa, 1 AS aa, 2 AS aa FROM source_table;
|
|
DEBUG: INSERT target table and the source relation of the SELECT partition column value must be colocated in distributed INSERT ... SELECT
|
|
DEBUG: Router planner cannot handle multi-shard select queries
|
|
DEBUG: Collecting INSERT ... SELECT results on coordinator
|
|
RESET client_min_messages;
|
|
SELECT count(*) FROM target_table;
|
|
count
|
|
---------------------------------------------------------------------
|
|
10
|
|
(1 row)
|
|
|
|
SET citus.enable_repartitioned_insert_select TO ON;
|
|
EXPLAIN (costs off) INSERT INTO target_table SELECT a AS aa, b AS aa, 1 AS aa, 2 AS aa FROM source_table;
|
|
QUERY PLAN
|
|
---------------------------------------------------------------------
|
|
Custom Scan (Citus INSERT ... SELECT)
|
|
INSERT/SELECT method: repartition
|
|
-> Custom Scan (Citus Adaptive)
|
|
Task Count: 4
|
|
Tasks Shown: One of 4
|
|
-> Task
|
|
Node: host=localhost port=xxxxx dbname=regression
|
|
-> Seq Scan on source_table_4213629 source_table
|
|
(8 rows)
|
|
|
|
DROP TABLE source_table, target_table;
|
|
SET client_min_messages TO WARNING;
|
|
DROP SCHEMA insert_select_repartition CASCADE;
|