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MDEV-18266 Changing an index comment unnecessarily rebuilds index

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ALTER_CHANGE_INDEX_COMMENT: new handler flag added

Compare_keys::EqualButComment: new outcome of compare_keys_but_name()
This commit is contained in:
Eugene Kosov
2019-07-10 21:15:12 +03:00
parent 70c2bde931
commit a0230bc76d
6 changed files with 42 additions and 7 deletions
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4
sql/lex_string.h
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@ -37,6 +37,10 @@ static inline bool cmp(const LEX_CSTRING *a, const LEX_CSTRING *b)
return (a->length != b->length ||
memcmp(a->str, b->str, a->length));
}
static inline bool cmp(const LEX_CSTRING a, const LEX_CSTRING b)
{
return a.length != b.length || memcmp(a.str, b.str, a.length);
}
/*
Compare if two LEX_CSTRING are equal. Assumption is that