mirror of https://github.com/citusdata/citus.git
67 lines
1.8 KiB
Plaintext
67 lines
1.8 KiB
Plaintext
-- ===================================================================
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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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-- drop table
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DROP TABLE sharded_table;
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