117 lines
2.8 KiB
Plaintext
117 lines
2.8 KiB
Plaintext
CREATE TABLE t1 (f1 int);
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INSERT INTO t1 VALUES (1);
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CREATE TABLE t2 AS SELECT * FROM t1;
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CREATE TABLE t3 AS SELECT * FROM t1;
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CREATE VIEW v1 AS SELECT * FROM t3;
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Case 1: IS query under 'FLUSH TABLES' command.
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FLUSH TABLES WITH READ LOCK;
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SELECT COUNT(*) FROM information_schema.columns
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WHERE table_name='db';
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COUNT(*)
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22
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UNLOCK TABLES;
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Case 2: Simple IS query under 'LOCK TABLE' command.
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LOCK TABLE t1 READ, v1 READ;
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SELECT COUNT(*) FROM t1;
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COUNT(*)
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1
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SELECT COUNT(*) FROM v1;
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COUNT(*)
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1
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Test that IS view will be opened without explicit LOCK TABLE on them.
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SELECT COUNT(*) FROM information_schema.columns WHERE table_name='db';
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COUNT(*)
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22
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Test that join between two IS views work fine in LOCK TABLE mode.
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SELECT COUNT(*) FROM information_schema.tables m
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JOIN information_schema.columns n
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ON m.table_name = n.table_name
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WHERE m.table_name='db';
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COUNT(*)
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22
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Test that IS view will be opened along with other locked tables.
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SELECT COUNT(*) FROM information_schema.columns, t1
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WHERE table_name='db';
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COUNT(*)
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22
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SELECT COUNT(*) FROM information_schema.columns, v1
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WHERE table_name='db';
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COUNT(*)
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22
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Test that we fail when tring to use user table that is not locked
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along with IS view.
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SELECT COUNT(*) FROM information_schema.columns, t2
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WHERE table_name='db';
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ERROR HY000: Table 't2' was not locked with LOCK TABLES
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UNLOCK TABLES;
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Case 3: IS query inside SP + SF + LOCK TABLE combination.
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CREATE FUNCTION func1()
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RETURNS INT DETERMINISTIC
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BEGIN
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DECLARE a int;
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SELECT COUNT(*) INTO a
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FROM information_schema.columns
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WHERE table_name='db';
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RETURN a;
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END $
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CREATE PROCEDURE proc1()
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BEGIN
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DECLARE i INT;
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SELECT (func1() + COUNT(*)) INTO i
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FROM information_schema.tables m
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JOIN information_schema.columns n
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ON m.table_name = n.table_name
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WHERE m.table_name='db';
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INSERT INTO t1 VALUES (i);
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END $
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Testing IS view inside SP + SF, not in LOCK TABLE.
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CALL proc1();
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SELECT * FROM t1;
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f1
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1
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44
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Enter LOCK TABLE mode.
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LOCK TABLE t1 WRITE, t1 as X READ, t3 READ;
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Testing IS view inside SF.
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SELECT func1() as COUNT_FROM_SP FROM t3;
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COUNT_FROM_SP
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22
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Testing IS view in outer query and also inside a SF.
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SELECT func1() as COUNT_FROM_SP, COUNT(*) FROM information_schema.tables m
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JOIN information_schema.columns n
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ON m.table_name = n.table_name
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WHERE m.table_name='db';
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COUNT_FROM_SP COUNT(*)
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22 22
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Testing IS view inside SP + SF, in LOCK TABLE mode.
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CALL proc1();
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SELECT * FROM t1 as X;
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f1
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1
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44
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44
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UNLOCK TABLES;
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Case 3: IS query inside SP + Trigger + LOCK TABLE combination.
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CREATE TRIGGER trig1 AFTER INSERT ON t1 FOR EACH ROW
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INSERT INTO t2 SELECT COUNT(*)>1 FROM information_schema.columns;
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Invoking trigger with IS not in LOCK TABLE mode.
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INSERT INTO t1 VALUES(1);
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SELECT * FROM t2;
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f1
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1
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1
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LOCK TABLE t1 WRITE, t2 WRITE;
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Invoking trigger with IS in LOCK TABLE mode.
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INSERT INTO t1 VALUES(1);
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SELECT * FROM t2;
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f1
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1
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1
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1
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UNLOCK TABLES;
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DROP TABLE t2;
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DROP TABLE t1, t3;
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DROP VIEW v1;
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DROP FUNCTION func1;
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DROP PROCEDURE proc1;
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