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Backport from 5.6: Bug#14769820 ASSERT FLEN == LEN

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IN ALTER TABLE ... ADD UNIQUE KEY

A bogus debug assertion failure occurred when reporting a duplicate
key on a column prefix of a CHAR column.

This is a regression from Bug#14729221 IN-PLACE ALTER TABLE REPORTS ''
INSTEAD OF REAL DUPLICATE VALUE FOR PREFIX KEYS. The assertion is only
present when UNIV_DEBUG is defined (which it is in debug builds
starting from MySQL 5.5). It is a case of overasserting.

Fix approved by Inaam Rana on IM.
This commit is contained in:
Marko Mäkelä 2012-10-22 22:10:33 +03:00
parent 03572c5b82
commit 507ffd4afc
1 changed files with 5 additions and 1 deletions
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6
storage/innodb_plugin/handler/handler0alter.cc
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@ -108,13 +108,17 @@ innobase_col_to_mysql(
/* These column types should never be shipped to MySQL. */
ut_ad(0);
case DATA_CHAR:
case DATA_FIXBINARY:
case DATA_FLOAT:
case DATA_DOUBLE:
case DATA_DECIMAL:
/* Above are the valid column types for MySQL data. */
ut_ad(flen == len);
/* fall through */
case DATA_CHAR:
/* We may have flen > len when there is a shorter
prefix on a CHAR column. */
ut_ad(flen >= len);
#else /* UNIV_DEBUG */
default:
#endif /* UNIV_DEBUG */