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| author | unknown <bar@bar.intranet.mysql.r18.ru> | 2004-02-02 17:50:14 +0400 |
|---|---|---|
| committer | unknown <bar@bar.intranet.mysql.r18.ru> | 2004-02-02 17:50:14 +0400 |
| commit | 65534b77a18aebb602ac23ed84351349818f0a2f (patch) | |
| tree | e2643d7f927c3323a0121e67db128017ff0c1077 /sql/item.h | |
| parent | c91c1470c8294a4ebdec2f31f115c8a05693f4f5 (diff) | |
| download | mariadb-git-65534b77a18aebb602ac23ed84351349818f0a2f.tar.gz | |
Indexes can be used for optimization if the operation
collation is the same with the index collation.
Diffstat (limited to 'sql/item.h')
| -rw-r--r-- | sql/item.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sql/item.h b/sql/item.h index 7b5c506079d..a5648c5889b 100644 --- a/sql/item.h +++ b/sql/item.h @@ -204,6 +204,7 @@ public: virtual Item *get_tmp_table_item(THD *thd) { return copy_or_same(thd); } CHARSET_INFO *default_charset() const; + virtual CHARSET_INFO *compare_collation() { return NULL; } virtual bool walk(Item_processor processor, byte *arg) { |