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| author | unknown <timour@askmonty.org> | 2010-09-05 18:43:47 +0300 |
|---|---|---|
| committer | unknown <timour@askmonty.org> | 2010-09-05 18:43:47 +0300 |
| commit | 18ad3bdc2fa3bbe1bfd7e433adb0bc6b3dbce8c8 (patch) | |
| tree | 6c257aff7c14aa611fc2a7f76149dc830c7ed9e8 /sql/item_cmpfunc.h | |
| parent | aa195b25704b4e67423654422ce0b601b54f809d (diff) | |
| download | mariadb-git-18ad3bdc2fa3bbe1bfd7e433adb0bc6b3dbce8c8.tar.gz | |
MWL#89: Cost-based choice between Materialization and IN->EXISTS transformation
Fixes for multiple problems/bugs/test failures that resulted from moving
subquery optimization from the execution phase to the optimization phase.
Diffstat (limited to 'sql/item_cmpfunc.h')
| -rw-r--r-- | sql/item_cmpfunc.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/sql/item_cmpfunc.h b/sql/item_cmpfunc.h index 053a54349c2..e161c1baa84 100644 --- a/sql/item_cmpfunc.h +++ b/sql/item_cmpfunc.h @@ -265,6 +265,8 @@ public: void keep_top_level_cache(); Item *transform(Item_transformer transformer, uchar *arg); virtual Item *expr_cache_insert_transformer(uchar *thd_arg); + bool is_expensive_processor(uchar *arg); + bool is_expensive(); }; class Comp_creator |