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The pilot patch for mwl#253.

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This commit is contained in:
Igor Babaev
2013-03-11 07:44:24 -07:00
parent 938d47dcdc
commit fc1c8ffdad
25 changed files with 1219 additions and 34 deletions
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6
sql/sql_select.h
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@ -292,6 +292,8 @@ typedef struct st_join_table {
/* psergey-todo: make the below have type double, like POSITION::records_read? */
ha_rows records_read;
double cond_selectivity;
/* Startup cost for execution */
double startup_cost;
@ -762,6 +764,8 @@ typedef struct st_position :public Sql_alloc
*/
double records_read;
double cond_selectivity;
/*
Cost accessing the table in course of the entire complete join execution,
i.e. cost of one access method use (e.g. 'range' or 'ref' scan ) times
@ -1804,6 +1808,8 @@ void eliminate_tables(JOIN *join);
/* Index Condition Pushdown entry point function */
void push_index_cond(JOIN_TAB *tab, uint keyno);
#define OPT_LINK_EQUAL_FIELDS 1
/****************************************************************************
Temporary table support for SQL Runtime
***************************************************************************/