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Bug #32858: Erro: "Incorrect usage of UNION and INTO" does not take

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subselects into account

It is forbidden to use the SELECT INTO construction inside UNION statements
unless on the last SELECT of the union. The parser records whether it 
has seen INTO or not when parsing a UNION statement. But if the INTO was
legally used in an outer query, an error is thrown if UNION is seen in a
subquery. Fixed in 5.0 by remembering the nesting level of INTO tokens and 
mitigate the error unless it collides with the UNION.
This commit is contained in:
mhansson/martin@linux-st28.site
2007-12-13 11:19:05 +01:00
parent 7f67efccef
commit 33c4431d39
5 changed files with 152 additions and 12 deletions
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42
mysql-test/r/union.result
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@@ -1389,4 +1389,46 @@ select @var;
1
(select 2) union (select 1 into @var);
ERROR 42000: Result consisted of more than one row
CREATE TABLE t1 (a INT);
INSERT INTO t1 VALUES (1);
SELECT a INTO @v FROM (
SELECT a FROM t1
UNION
SELECT a FROM t1
) alias;
SELECT a INTO OUTFILE 'union.out.file' FROM (
SELECT a FROM t1
UNION
SELECT a FROM t1 WHERE 0
) alias;
SELECT a INTO DUMPFILE 'union.out.file2' FROM (
SELECT a FROM t1
UNION
SELECT a FROM t1 WHERE 0
) alias;
SELECT a FROM (
SELECT a FROM t1
UNION
SELECT a INTO @v FROM t1
) alias;
SELECT a FROM (
SELECT a FROM t1
UNION
SELECT a INTO OUTFILE 'union.out.file3' FROM t1
) alias;
SELECT a FROM (
SELECT a FROM t1
UNION
SELECT a INTO DUMPFILE 'union.out.file4' FROM t1
) alias;
SELECT a FROM t1 UNION SELECT a INTO @v FROM t1;
SELECT a FROM t1 UNION SELECT a INTO OUTFILE 'union.out.file5' FROM t1;
SELECT a FROM t1 UNION SELECT a INTO OUTFILE 'union.out.file6' FROM t1;
SELECT a INTO @v FROM t1 UNION SELECT a FROM t1;
ERROR HY000: Incorrect usage of UNION and INTO
SELECT a INTO OUTFILE 'union.out.file7' FROM t1 UNION SELECT a FROM t1;
ERROR HY000: Incorrect usage of UNION and INTO
SELECT a INTO DUMPFILE 'union.out.file8' FROM t1 UNION SELECT a FROM t1;
ERROR HY000: Incorrect usage of UNION and INTO
DROP TABLE t1;
End of 5.0 tests