mirror of https://github.com/citusdata/citus.git
326 lines
9.5 KiB
Plaintext
326 lines
9.5 KiB
Plaintext
ALTER SEQUENCE pg_catalog.pg_dist_shardid_seq RESTART 990000;
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ALTER SEQUENCE pg_catalog.pg_dist_jobid_seq RESTART 990000;
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-- ===================================================================
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-- test utility statement functionality
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-- ===================================================================
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CREATE TABLE sharded_table ( name text, id bigint );
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SELECT master_create_distributed_table('sharded_table', 'id', 'hash');
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master_create_distributed_table
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---------------------------------
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(1 row)
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SELECT master_create_worker_shards('sharded_table', 2, 1);
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master_create_worker_shards
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-----------------------------
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(1 row)
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-- COPY out is supported with distributed tables
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COPY sharded_table TO STDOUT;
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COPY (SELECT COUNT(*) FROM sharded_table) TO STDOUT;
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0
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-- cursors may not involve distributed tables
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DECLARE all_sharded_rows CURSOR FOR SELECT * FROM sharded_table;
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ERROR: DECLARE CURSOR can only be used in transaction blocks
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-- verify PREPARE functionality
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PREPARE sharded_insert AS INSERT INTO sharded_table VALUES ('adam', 1);
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PREPARE sharded_update AS UPDATE sharded_table SET name = 'bob' WHERE id = 1;
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PREPARE sharded_delete AS DELETE FROM sharded_table WHERE id = 1;
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PREPARE sharded_query AS SELECT name FROM sharded_table WHERE id = 1;
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EXECUTE sharded_query;
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name
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------
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(0 rows)
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EXECUTE sharded_insert;
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EXECUTE sharded_query;
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name
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------
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adam
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(1 row)
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EXECUTE sharded_update;
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EXECUTE sharded_query;
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name
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------
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bob
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(1 row)
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EXECUTE sharded_delete;
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EXECUTE sharded_query;
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name
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------
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(0 rows)
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-- try to drop shards with where clause
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SELECT master_apply_delete_command('DELETE FROM sharded_table WHERE id > 0');
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ERROR: cannot delete from distributed table
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DETAIL: Delete statements on hash-partitioned tables with where clause is not supported
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-- drop all shards
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SELECT master_apply_delete_command('DELETE FROM sharded_table');
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master_apply_delete_command
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-----------------------------
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2
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(1 row)
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-- lock shard metadata: take some share locks and exclusive locks
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BEGIN;
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SELECT lock_shard_metadata(5, ARRAY[999001, 999002, 999002]);
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lock_shard_metadata
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---------------------
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(1 row)
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SELECT lock_shard_metadata(7, ARRAY[999001, 999003, 999004]);
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lock_shard_metadata
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---------------------
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(1 row)
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SELECT locktype, objid, mode, granted
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FROM pg_locks
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WHERE objid IN (999001, 999002, 999003, 999004)
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ORDER BY objid, mode;
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locktype | objid | mode | granted
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----------+--------+---------------+---------
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advisory | 999001 | ExclusiveLock | t
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advisory | 999001 | ShareLock | t
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advisory | 999002 | ShareLock | t
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advisory | 999003 | ExclusiveLock | t
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advisory | 999004 | ExclusiveLock | t
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(5 rows)
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END;
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-- lock shard metadata: unsupported lock type
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SELECT lock_shard_metadata(0, ARRAY[990001, 999002]);
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ERROR: unsupported lockmode 0
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-- lock shard metadata: invalid shard ID
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SELECT lock_shard_metadata(5, ARRAY[0]);
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lock_shard_metadata
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---------------------
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(1 row)
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-- lock shard metadata: lock nothing
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SELECT lock_shard_metadata(5, ARRAY[]::bigint[]);
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ERROR: no locks specified
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-- lock shard resources: take some share locks and exclusive locks
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BEGIN;
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SELECT lock_shard_resources(5, ARRAY[999001, 999002, 999002]);
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lock_shard_resources
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----------------------
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(1 row)
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SELECT lock_shard_resources(7, ARRAY[999001, 999003, 999004]);
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lock_shard_resources
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----------------------
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(1 row)
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SELECT locktype, objid, mode, granted
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FROM pg_locks
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WHERE objid IN (999001, 999002, 999003, 999004)
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ORDER BY objid, mode;
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locktype | objid | mode | granted
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----------+--------+---------------+---------
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advisory | 999001 | ExclusiveLock | t
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advisory | 999001 | ShareLock | t
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advisory | 999002 | ShareLock | t
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advisory | 999003 | ExclusiveLock | t
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advisory | 999004 | ExclusiveLock | t
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(5 rows)
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END;
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-- lock shard metadata: unsupported lock type
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SELECT lock_shard_resources(0, ARRAY[990001, 999002]);
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ERROR: unsupported lockmode 0
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-- lock shard metadata: invalid shard ID
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SELECT lock_shard_resources(5, ARRAY[-1]);
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lock_shard_resources
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----------------------
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(1 row)
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-- lock shard metadata: lock nothing
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SELECT lock_shard_resources(5, ARRAY[]::bigint[]);
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ERROR: no locks specified
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-- drop table
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DROP TABLE sharded_table;
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-- VACUUM tests
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-- create a table with a single shard (for convenience)
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CREATE TABLE dustbunnies (id integer, name text, age integer);
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SELECT master_create_distributed_table('dustbunnies', 'id', 'hash');
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master_create_distributed_table
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---------------------------------
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(1 row)
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SELECT master_create_worker_shards('dustbunnies', 1, 2);
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master_create_worker_shards
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-----------------------------
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(1 row)
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-- add some data to the distributed table
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\copy dustbunnies (id, name) from stdin with csv
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-- following approach adapted from PostgreSQL's stats.sql file
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-- save relevant stat counter values in refreshable view
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\c - - - :worker_1_port
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CREATE MATERIALIZED VIEW prevcounts AS
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SELECT analyze_count, vacuum_count FROM pg_stat_user_tables
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WHERE relname='dustbunnies_990002';
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-- create function that sleeps until those counters increment
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create function wait_for_stats() returns void as $$
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declare
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start_time timestamptz := clock_timestamp();
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analyze_updated bool;
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vacuum_updated bool;
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begin
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-- we don't want to wait forever; loop will exit after 10 seconds
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for i in 1 .. 100 loop
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-- check to see if analyze has been updated
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SELECT (st.analyze_count >= pc.analyze_count + 1) INTO analyze_updated
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FROM pg_stat_user_tables AS st, pg_class AS cl, prevcounts AS pc
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WHERE st.relname='dustbunnies_990002' AND cl.relname='dustbunnies_990002';
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-- check to see if vacuum has been updated
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SELECT (st.vacuum_count >= pc.vacuum_count + 1) INTO vacuum_updated
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FROM pg_stat_user_tables AS st, pg_class AS cl, prevcounts AS pc
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WHERE st.relname='dustbunnies_990002' AND cl.relname='dustbunnies_990002';
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exit when analyze_updated or vacuum_updated;
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-- wait a little
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perform pg_sleep(0.1);
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-- reset stats snapshot so we can test again
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perform pg_stat_clear_snapshot();
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end loop;
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-- report time waited in postmaster log (where it won't change test output)
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raise log 'wait_for_stats delayed % seconds',
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extract(epoch from clock_timestamp() - start_time);
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end
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$$ language plpgsql;
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-- run VACUUM and ANALYZE against the table on the master
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\c - - - :master_port
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VACUUM dustbunnies;
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ANALYZE dustbunnies;
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-- verify that the VACUUM and ANALYZE ran
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\c - - - :worker_1_port
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SELECT wait_for_stats();
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wait_for_stats
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----------------
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(1 row)
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REFRESH MATERIALIZED VIEW prevcounts;
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SELECT pg_stat_get_vacuum_count('dustbunnies_990002'::regclass);
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pg_stat_get_vacuum_count
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--------------------------
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1
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(1 row)
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SELECT pg_stat_get_analyze_count('dustbunnies_990002'::regclass);
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pg_stat_get_analyze_count
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---------------------------
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1
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(1 row)
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-- get file node to verify VACUUM FULL
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SELECT relfilenode AS oldnode FROM pg_class WHERE oid='dustbunnies_990002'::regclass
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\gset
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-- send a VACUUM FULL and a VACUUM ANALYZE
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\c - - - :master_port
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VACUUM (FULL) dustbunnies;
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VACUUM ANALYZE dustbunnies;
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-- verify that relfilenode changed
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\c - - - :worker_1_port
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SELECT relfilenode != :oldnode AS table_rewritten FROM pg_class
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WHERE oid='dustbunnies_990002'::regclass;
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table_rewritten
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-----------------
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t
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(1 row)
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-- verify the VACUUM ANALYZE incremented both vacuum and analyze counts
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SELECT wait_for_stats();
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wait_for_stats
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----------------
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(1 row)
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SELECT pg_stat_get_vacuum_count('dustbunnies_990002'::regclass);
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pg_stat_get_vacuum_count
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--------------------------
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2
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(1 row)
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SELECT pg_stat_get_analyze_count('dustbunnies_990002'::regclass);
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pg_stat_get_analyze_count
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---------------------------
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2
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(1 row)
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-- disable auto-VACUUM for next test
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ALTER TABLE dustbunnies_990002 SET (autovacuum_enabled = false);
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SELECT relfrozenxid AS frozenxid FROM pg_class WHERE oid='dustbunnies_990002'::regclass
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\gset
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-- send a VACUUM FREEZE after adding a new row
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\c - - - :master_port
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INSERT INTO dustbunnies VALUES (5, 'peter');
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VACUUM (FREEZE) dustbunnies;
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-- verify that relfrozenxid increased
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\c - - - :worker_1_port
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SELECT relfrozenxid::text::integer > :frozenxid AS frozen_performed FROM pg_class
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WHERE oid='dustbunnies_990002'::regclass;
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frozen_performed
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------------------
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t
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(1 row)
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-- check there are no nulls in either column
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SELECT attname, null_frac FROM pg_stats
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WHERE tablename = 'dustbunnies_990002' ORDER BY attname;
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attname | null_frac
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---------+-----------
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age | 1
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id | 0
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name | 0
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(3 rows)
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-- add NULL values, then perform column-specific ANALYZE
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\c - - - :master_port
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INSERT INTO dustbunnies VALUES (6, NULL, NULL);
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ANALYZE dustbunnies (name);
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-- verify that name's NULL ratio is updated but age's is not
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\c - - - :worker_1_port
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SELECT attname, null_frac FROM pg_stats
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WHERE tablename = 'dustbunnies_990002' ORDER BY attname;
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attname | null_frac
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---------+-----------
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age | 1
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id | 0
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name | 0.166667
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(3 rows)
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\c - - - :master_port
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-- verify warning for unqualified VACUUM
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VACUUM;
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WARNING: not propagating VACUUM command to worker nodes
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HINT: Provide a specific table in order to VACUUM distributed tables.
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-- and warning when using targeted VACUUM without DDL propagation
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SET citus.enable_ddl_propagation to false;
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VACUUM dustbunnies;
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WARNING: not propagating VACUUM command to worker nodes
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HINT: Set citus.enable_ddl_propagation to true in order to send targeted VACUUM commands to worker nodes.
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SET citus.enable_ddl_propagation to DEFAULT;
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-- TODO: support VERBOSE
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-- VACUUM VERBOSE dustbunnies;
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-- VACUUM (FULL, VERBOSE) dustbunnies;
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-- ANALYZE VERBOSE dustbunnies;
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