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Optimisation if simple IN subselect with primary index

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(SCRUM) (part of WL#818)


mysql-test/r/subselect.result:
  test of new optimisation
mysql-test/t/subselect.test:
  test of new optimisation
sql/item_subselect.cc:
  new engine for simple IN with primary index
sql/item_subselect.h:
  new engine for simple IN with primary index
sql/sql_lex.h:
  fixed typo
sql/sql_select.cc:
  engine changing
  report_error can't be static, because it used in new engine
sql/sql_select.h:
  new JT_ type (just for information in EXPLAIN statement)
  report_error can't be static, because it used in new engine
This commit is contained in:
unknown
2003-07-07 18:40:19 +03:00
parent 2cd6d8ec6b
commit 923dba86b1
7 changed files with 177 additions and 10 deletions
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5
sql/sql_select.h
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@ -75,7 +75,8 @@ typedef struct st_join_cache {
*/
enum join_type { JT_UNKNOWN,JT_SYSTEM,JT_CONST,JT_EQ_REF,JT_REF,JT_MAYBE_REF,
JT_ALL, JT_RANGE, JT_NEXT, JT_FT, JT_REF_OR_NULL};
JT_ALL, JT_RANGE, JT_NEXT, JT_FT, JT_REF_OR_NULL,
JT_SIMPLE_IN};
class JOIN;
@ -305,7 +306,6 @@ bool create_myisam_from_heap(THD *thd, TABLE *table, TMP_TABLE_PARAM *param,
/* functions from opt_sum.cc */
int opt_sum_query(TABLE_LIST *tables, List<Item> &all_fields,COND *conds);
/* class to copying an field/item to a key struct */
class store_key :public Sql_alloc
@ -407,3 +407,4 @@ public:
bool cp_buffer_from_ref(TABLE_REF *ref);
bool error_if_full_join(JOIN *join);
void relink_tables(SELECT_LEX *select_lex);
int report_error(TABLE *table, int error);