Commit ff79cd68 authored by unknown's avatar unknown
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WL#3527: Extend IGNORE INDEX so places where index is ignored can 

         be specified
 5.0 part of the fix. Implements IGNORE INDEX FOR JOIN as a synonym
 of IGNORE INDEX for backward compatibility with the 5.1 fix.


mysql-test/r/select.result:
  WL#3527: Extend IGNORE INDEX so places where index is ignored can 
           be specified
  - test case
mysql-test/t/select.test:
  WL#3527: Extend IGNORE INDEX so places where index is ignored can 
           be specified
  - test case
parent 5df7d39e

mysql-test/r/select.result

+9 −0
Original line number Diff line number Diff line
@@ -3611,3 +3611,12 @@ id select_type table type possible_keys key key_len ref rows Extra 
1	SIMPLE	t2	range	si,ai	si	5	NULL	2	Using where

1	SIMPLE	t3	eq_ref	PRIMARY,ci	PRIMARY	4	test.t2.a	1	Using where

DROP TABLE t1,t2,t3;

CREATE TABLE t1 (a INT, b INT, KEY (a));

INSERT INTO t1 VALUES (1,1),(2,2);

EXPLAIN SELECT 1 FROM t1 WHERE a = 1;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	t1	ref	a	a	5	const	1	Using where; Using index

EXPLAIN SELECT 1 FROM t1 IGNORE INDEX FOR JOIN (a) WHERE a = 1;

id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra

1	SIMPLE	t1	ALL	NULL	NULL	NULL	NULL	2	Using where

DROP TABLE t1;

mysql-test/t/select.test

+10 −0
Original line number Diff line number Diff line
@@ -3092,3 +3092,13 @@ SELECT t3.a FROM t1,t2,t3 
        t3.c IN ('bb','ee');



DROP TABLE t1,t2,t3;



#

# WL3527: Extend IGNORE INDEX so places where index is ignored can 

#         be specified

#       

CREATE TABLE t1 (a INT, b INT, KEY (a)); INSERT INTO t1 VALUES (1,1),(2,2);

EXPLAIN SELECT 1 FROM t1 WHERE a = 1;

EXPLAIN SELECT 1 FROM t1 IGNORE INDEX FOR JOIN (a) WHERE a = 1;

DROP TABLE t1;

sql/sql_yacc.yy

+13 −4
Original line number Diff line number Diff line
@@ -772,7 +772,7 @@ bool my_yyoverflow(short **a, YYSTYPE **b, ulong *yystacksize); 
	key_alg opt_btree_or_rtree



%type <string_list>

	key_usage_list using_list

	key_usage_list key_usage_list_inner using_list



%type <key_part>

	key_part
@@ -5553,6 +5553,10 @@ opt_outer: 
	/* empty */	{}

	| OUTER		{};



opt_for_join:

        /* empty */

        | FOR_SYM JOIN_SYM;



opt_key_definition:

	/* empty */	{}

	| USE_SYM    key_usage_list
@@ -5568,15 +5572,20 @@ opt_key_definition: 
	    sel->use_index_ptr= &sel->use_index;

	    sel->table_join_options|= TL_OPTION_FORCE_INDEX;

	  }

	| IGNORE_SYM key_usage_list

	| IGNORE_SYM key_or_index opt_for_join key_usage_list_inner

	  {

	    SELECT_LEX *sel= Select;

	    sel->ignore_index= *$2;

	    sel->ignore_index= *$4;

	    sel->ignore_index_ptr= &sel->ignore_index;

	  };



key_usage_list:

	key_or_index { Select->interval_list.empty(); }

	key_or_index key_usage_list_inner

        { $$= $2; }

	;



key_usage_list_inner:

	{ Select->interval_list.empty(); }

        '(' key_list_or_empty ')'

        { $$= &Select->interval_list; }

	;