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MDEV-13273 Confusion between table alias and ROW type variable

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This commit is contained in:
Alexander Barkov
2017-07-07 17:00:07 +04:00
parent 9e53a6bdfd
commit c1885d22df
5 changed files with 352 additions and 14 deletions
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86
mysql-test/r/sp-row.result
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@ -129,15 +129,17 @@ CALL p1();
ERROR 21000: Operand should contain 2 column(s)
DROP PROCEDURE p1;
#
# Bad usage of a scalar variable as a row
# Scalar variable vs table alias cause no ambiguity
#
CREATE PROCEDURE p1()
BEGIN
DECLARE a INT;
SELECT a.x FROM t1;
-- a.x is a table column here (not a row variable field)
SELECT a.x FROM a;
SELECT a.x FROM t1 a;
END;
$$
ERROR HY000: 'a' is not a row variable
DROP PROCEDURE p1;
#
# Using the entire ROW variable in select list
#
@ -2166,3 +2168,81 @@ rec1.a rec1.b
10 b10
DROP TABLE t1;
DROP PROCEDURE p1;
#
# MDEV-13273 Confusion between table alias and ROW type variable
#
CREATE TABLE t1 (c1 INT, c2 INT);
INSERT INTO t1 VALUES (0,0);
CREATE PROCEDURE p1()
BEGIN
DECLARE a INT;
DECLARE b INT;
-- a.c1 is a table column
SELECT a.c1 INTO b
FROM t1 a
WHERE a.c2 = 0;
SELECT b;
END;
$$
CALL p1;
b
0
DROP PROCEDURE p1;
DROP TABLE t1;
CREATE TABLE t1 (c1 INT, c2 INT);
INSERT INTO t1 VALUES (0,0);
CREATE PROCEDURE p1()
BEGIN
DECLARE a ROW (c1 INT, c2 INT) DEFAULT ROW(101,102);
DECLARE b INT;
-- a.c1 is a ROW variable field
SELECT a.c1 INTO b
FROM t1 a
WHERE a.c2 = 102;
SELECT b;
END;
$$
CALL p1;
b
101
DROP PROCEDURE p1;
DROP TABLE t1;
CREATE TABLE t1 (c1 INT, c2 INT);
INSERT INTO t1 VALUES (0,0);
CREATE PROCEDURE p1()
BEGIN
DECLARE a ROW TYPE OF t1 DEFAULT ROW (10,20);
DECLARE b INT;
-- a.c1 is a ROW variable field
SELECT a.c1 INTO b
FROM t1 a
WHERE a.c2 = 20;
SELECT b;
END;
$$
CALL p1;
b
10
DROP PROCEDURE p1;
DROP TABLE t1;
CREATE TABLE t1 (c1 INT, c2 INT);
INSERT INTO t1 VALUES (0,0);
CREATE PROCEDURE p1()
BEGIN
DECLARE cur1 CURSOR FOR SELECT * FROM t1;
BEGIN
DECLARE a ROW TYPE OF cur1 DEFAULT ROW (10,20);
DECLARE b INT;
-- a.c1 is a ROW variable field
SELECT a.c1 INTO b
FROM t1 a
WHERE a.c2 = 20;
SELECT b;
END;
END;
$$
CALL p1;
b
10
DROP PROCEDURE p1;
DROP TABLE t1;