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Post review fixes of MWL#148 (moving max/min optimization in optimize phase).

Browse source 
sql/item_subselect.cc:
  Cleanup. Comments added.
sql/item_subselect.h:
  Cleanup.
sql/mysql_priv.h:
  Comments added.
sql/opt_subselect.cc:
  The function renamed and turned to method.
  Comments added.
sql/opt_subselect.h:
  The function turned to method of JOIN.
sql/sql_select.cc:
  Comment added. The function turned to method.
sql/sql_select.h:
  The function turned to method.
This commit is contained in:
unknown 2011-05-12 00:14:15 +03:00
commit 18d08eeacc
7 changed files with 114 additions and 58 deletions
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15
sql/mysql_priv.h
View file

@ -678,17 +678,28 @@ enabled by default, add OPTIMIZER_SWITCH_MATERIALIZATION
*/
#define CONTEXT_ANALYSIS_ONLY_DERIVED 4
// uncachable cause
/*
Uncachable causes:
This subquery has fields from outer query (put by user)
*/
#define UNCACHEABLE_DEPENDENT_GENERATED 1
/* This subquery contains functions with random result */
#define UNCACHEABLE_RAND 2
/* This subquery contains functions with side effect */
#define UNCACHEABLE_SIDEEFFECT 4
/// forcing to save JOIN for explain
/* Forcing to save JOIN tables for explain */
#define UNCACHEABLE_EXPLAIN 8
/* For uncorrelated SELECT in an UNION with some correlated SELECTs */
#define UNCACHEABLE_UNITED 16
#define UNCACHEABLE_CHECKOPTION 32
/*
This subquery has fields from outer query injected during
transformation process
*/
#define UNCACHEABLE_DEPENDENT_INJECTED 64
/* This subquery has fields from outer query (any nature) */
#define UNCACHEABLE_DEPENDENT (UNCACHEABLE_DEPENDENT_GENERATED | \
UNCACHEABLE_DEPENDENT_INJECTED)