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+# include/index_merge_ror.inc
+#
+#  ROR-index_merge tests.
+#
+# The variable
+#     $engine_type       -- storage engine to be tested
+# has to be set before sourcing this script.
+#
+# Note: The comments/expectations refer to MyISAM.
+#       They might be not valid for other storage engines.
+#
+# Last update:
+# 2006-08-02 ML test refactored
+#               old name was t/index_merge_ror.test
+#               main code went into include/index_merge_ror.inc
+#
+
+--echo #---------------- ROR-index_merge tests -----------------------
+
+create table t1
+(
+  /* Field names reflect value(rowid) distribution, st=STairs, swt= SaWTooth */
+  st_a int not null default 0,
+  swt1a int not null default 0,
+  swt2a int not null default 0,
+
+  st_b int not null default 0,
+  swt1b int not null default 0,
+  swt2b int not null default 0,
+
+  /* fields/keys for row retrieval tests */
+  key1 int,
+  key2 int,
+  key3 int,
+  key4 int,
+
+  /* make rows much bigger then keys */
+  filler1 char (200),
+  filler2 char (200),
+  filler3 char (200),
+  filler4 char (200),
+  filler5 char (200),
+  filler6 char (200),
+
+  /* order of keys is important */
+  key sta_swt12a(st_a,swt1a,swt2a),
+  key sta_swt1a(st_a,swt1a),
+  key sta_swt2a(st_a,swt2a),
+  key sta_swt21a(st_a,swt2a,swt1a),
+
+  key st_a(st_a),
+  key stb_swt1a_2b(st_b,swt1b,swt2a),
+  key stb_swt1b(st_b,swt1b),
+  key st_b(st_b),
+
+  key(key1),
+  key(key2),
+  key(key3),
+  key(key4)
+) ;
+# Fill table
+create table t0 as select * from t1;
+--disable_query_log
+--echo # Printing of many insert into t0 values (....) disabled.
+begin;
+let $cnt=1000;
+while ($cnt)
+{
+  eval insert into t0 values (1, 2, 3, 1, 2, 3, 0, 0, 0, 0, 'data1', 'data2', 'data3', 'data4', 'data5', 'data6');
+  dec $cnt;
+}
+commit;
+--enable_query_log
+
+alter table t1 disable keys;
+--disable_query_log
+--echo # Printing of many insert into t1 select .... from t0 disabled.
+let $1=4;
+begin;
+while ($1)
+{
+  let $2=4;
+  while ($2)
+  {
+    let $3=4;
+    while ($3)
+    {
+      eval insert into t1 select $1, $2, $3, $1 ,$2, $3, key1, key2, key3, key4, filler1, filler2, filler3, filler4, filler5, filler6 from t0;
+      dec $3;
+    }
+    dec $2;
+  }
+ dec $1;
+}
+commit;
+
+--echo # Printing of many insert into t1 (...) values (....) disabled.
+# Row retrieval tests
+# -1 is used for values 'out of any range we are using'
+# insert enough rows for index intersection to be used for (key1,key2)
+insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 100, 100,'key1-key2-key3-key4');
+let $cnt=400;
+begin;
+while ($cnt)
+{
+  eval insert into t1 (key1, key2, key3, key4, filler1) values (100, -1, 100, -1,'key1-key3');
+  dec $cnt;
+}
+let $cnt=400;
+while ($cnt)
+{
+  eval insert into t1 (key1, key2, key3, key4, filler1) values (-1, 100, -1, 100,'key2-key4');
+  dec $cnt;
+}
+commit;
+--enable_query_log
+alter table t1 enable keys;
+select count(*) from t1;
+
+# One row results tests for cases where a single row matches all conditions
+explain select key1,key2 from t1 where key1=100 and key2=100;
+select key1,key2 from t1 where key1=100 and key2=100;
+explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
+select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
+
+# Several-rows results
+insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, -1, -1, 'key1-key2');
+insert into t1 (key1, key2, key3, key4, filler1) values (-1, -1, 100, 100, 'key4-key3');
+
+#  ROR-intersection, not covering
+explain select key1,key2,filler1 from t1 where key1=100 and key2=100;
+select key1,key2,filler1 from t1 where key1=100 and key2=100;
+
+#  ROR-intersection, covering
+explain select key1,key2 from t1 where key1=100 and key2=100;
+select key1,key2 from t1 where key1=100 and key2=100;
+
+#  ROR-union of ROR-intersections
+explain select key1,key2,key3,key4 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
+select key1,key2,key3,key4 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
+explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
+select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
+
+#  3-way ROR-intersection
+explain select key1,key2,key3 from t1 where key1=100 and key2=100 and key3=100;
+select key1,key2,key3 from t1 where key1=100 and key2=100 and key3=100;
+
+#  ROR-union(ROR-intersection, ROR-range)
+insert into t1 (key1,key2,key3,key4,filler1) values (101,101,101,101, 'key1234-101');
+explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=101;
+select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=101;
+
+# Run some ROR updates/deletes
+select key1,key2, filler1 from t1 where key1=100 and key2=100;
+update t1 set filler1='to be deleted' where key1=100 and key2=100;
+update t1 set key1=200,key2=200 where key1=100 and key2=100;
+delete from t1 where key1=200 and key2=200;
+select key1,key2,filler1 from t1 where key2=100 and key2=200;
+
+# ROR-union(ROR-intersection) with one of ROR-intersection giving empty
+# results
+explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
+select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
+
+delete from t1 where key3=100 and key4=100;
+
+# ROR-union with all ROR-intersections giving empty results
+explain select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
+select key1,key2,key3,key4,filler1 from t1 where key1=100 and key2=100 or key3=100 and key4=100;
+
+# ROR-intersection with empty result
+explain select key1,key2 from t1 where key1=100 and key2=100;
+select key1,key2 from t1 where key1=100 and key2=100;
+
+# ROR-union tests with various cases.
+#  All scans returning duplicate rows:
+insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 200, 200,'key1-key2-key3-key4-1');
+insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 200, 200,'key1-key2-key3-key4-2');
+insert into t1 (key1, key2, key3, key4, filler1) values (100, 100, 200, 200,'key1-key2-key3-key4-3');
+
+explain select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;
+select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;
+
+insert into t1 (key1, key2, key3, key4, filler1) values (-1, -1, -1, 200,'key4');
+
+explain select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;
+select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;
+
+insert into t1 (key1, key2, key3, key4, filler1) values (-1, -1, 200, -1,'key3');
+
+explain select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;
+select key1,key2,key3,key4,filler1 from t1 where key3=200 or (key1=100 and key2=100) or key4=200;
+
+##
+## Optimizer tests
+##
+
+# Check that the shortest key is used for ROR-intersection, covering and non-covering.
+explain select * from t1 where st_a=1 and st_b=1;
+explain select st_a,st_b from t1 where st_a=1 and st_b=1;
+
+# Check if "ingore index" syntax works
+explain select st_a from t1 ignore index (st_a) where st_a=1 and st_b=1;
+
+# Do many tests
+# Check that keys that don't improve selectivity are skipped.
+#
+
+# Different value on 32 and 64 bit
+--replace_result sta_swt12a sta_swt21a sta_swt12a, sta_swt12a,
+explain select * from t1 where st_a=1 and swt1a=1 and swt2a=1;
+
+explain select * from t1 where st_b=1 and swt1b=1 and swt2b=1;
+
+explain select * from t1 where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1;
+
+explain select * from t1 ignore index (sta_swt21a, stb_swt1a_2b)
+  where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1;
+
+explain select * from t1 ignore index (sta_swt21a, sta_swt12a, stb_swt1a_2b)
+  where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1;
+
+explain select * from t1 ignore index (sta_swt21a, sta_swt12a, stb_swt1a_2b, stb_swt1b)
+  where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1 and swt2b=1;
+
+explain select * from t1
+  where st_a=1 and swt1a=1 and swt2a=1 and st_b=1 and swt1b=1;
+
+explain select * from t1
+  where st_a=1 and swt1a=1 and st_b=1 and swt1b=1 and swt1b=1;
+
+explain select st_a from t1
+  where st_a=1 and swt1a=1 and st_b=1 and swt1b=1 and swt1b=1;
+
+explain select st_a from t1
+  where st_a=1 and swt1a=1 and st_b=1 and swt1b=1 and swt1b=1;
+
+drop table t0,t1;
+
+# 'Partially' covered fields test
+
+create table t2 (
+  a char(10),
+  b char(10),
+  filler1 char(255),
+  filler2 char(255),
+  key(a(5)),
+  key(b(5))
+);
+
+--disable_query_log
+let $1=8;
+begin;
+while ($1)
+{
+  eval insert into t2 values (repeat(char($1+64), 8),repeat(char($1+64), 8),'filler1', 'filler2');
+  dec $1;
+}
+insert into t2 select * from t2;
+insert into t2 select * from t2;
+commit;
+--enable_query_log
+
+# The table row buffer is reused. Fill it with rows that don't match.
+select count(a) from t2 where a='BBBBBBBB';
+select count(a) from t2 where b='BBBBBBBB';
+
+# BUG#1:
+--replace_result a a_or_b b a_or_b
+explain select count(a) from t2 where a='AAAAAAAA' and b='AAAAAAAA';
+select count(a) from t2 where a='AAAAAAAA' and b='AAAAAAAA';
+select count(a) from t2 ignore index(a,b) where a='AAAAAAAA' and b='AAAAAAAA';
+
+insert into t2 values ('ab', 'ab', 'uh', 'oh');
+explain select a from t2 where a='ab';
+drop table t2;
+
+#
+# BUG#25048 - ERROR 126 : Incorrect key file for table '.XXXX.MYI'; try to
+#             repair it
+#
+CREATE TABLE t1(c1 INT, c2 INT DEFAULT 0, c3 CHAR(255) DEFAULT '',
+KEY(c1), KEY(c2), KEY(c3));
+INSERT INTO t1(c1) VALUES(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),
+(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0),(0);
+INSERT INTO t1 VALUES(0,0,0);
+CREATE TABLE t2(c1 int);
+INSERT INTO t2 VALUES(1);
+DELETE t1 FROM t1,t2 WHERE t1.c1=0 AND t1.c2=0;
+SELECT * FROM t1;
+DROP TABLE t1,t2;