Merge

mysql-test/r/union.result:
  Auto merged
mysql-test/t/union.test:
  Auto merged
sql/item.cc:
  Auto merged
sql/item.h:
  Auto merged
sql/item_cmpfunc.cc:
  Auto merged
sql/item_cmpfunc.h:
  Auto merged
sql/item_subselect.cc:
  Auto merged
sql/item_subselect.h:
  Auto merged
sql/item_sum.cc:
  Auto merged
sql/item_sum.h:
  Auto merged
sql/mysql_priv.h:
  Auto merged
sql/sql_base.cc:
  Auto merged
sql/sql_class.cc:
  Auto merged
sql/sql_class.h:
  Auto merged
sql/sql_derived.cc:
  Auto merged
sql/sql_union.cc:
  Auto merged
sql/sql_yacc.yy:
  Auto merged
mysql-test/r/subselect.result:
  SCCS merged
mysql-test/t/subselect.test:
  SCCS merged

1 files changed, 56 insertions, 0 deletions

diff --git a/mysql-test/t/union.test b/mysql-test/t/union.test
index 8f49f56b991..b64f0b4e2ee 100644
--- a/mysql-test/t/union.test
+++ b/mysql-test/t/union.test
@@ -194,6 +194,62 @@ select * from t4;
 drop table t1,t2,t3,t4;
 
 #
+# Test of SQL_CALC_FOUND_ROW handling
+#
+create table t1 (a int);
+insert into t1 values (1),(2),(3);
+create table t2 (a int);
+insert into t2 values (3),(4),(5);
+
+# Test global limits
+(SELECT SQL_CALC_FOUND_ROWS * FROM t1) UNION all (SELECT * FROM t2) LIMIT 1;
+select found_rows();
+(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION all (SELECT * FROM t2) LIMIT 2;
+select found_rows();
+
+# Test cases where found_rows() should return number of returned rows
+(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION all (SELECT * FROM t2);
+select found_rows();
+(SELECT SQL_CALC_FOUND_ROWS * FROM t1) UNION all (SELECT * FROM t2 LIMIT 1);
+select found_rows();
+# This used to work in 4.0 but not anymore in 4.1
+--error 1149
+(SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1) UNION SELECT * FROM t2 LIMIT 1;
+#select found_rows();
+
+# In these case found_rows() should work
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION all SELECT * FROM t2 LIMIT 2;
+select found_rows();
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION all SELECT * FROM t2 LIMIT 2;
+select found_rows();
+
+# The following examples will not be exact
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2;
+select found_rows();
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 100;
+select found_rows();
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 100 UNION SELECT * FROM t2;
+select found_rows();
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION SELECT * FROM t2;
+select found_rows();
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 LIMIT 1 UNION SELECT * FROM t2 LIMIT 2;
+select found_rows();
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 UNION SELECT * FROM t2 LIMIT 2,2;
+select found_rows();
+SELECT SQL_CALC_FOUND_ROWS * FROM t1 limit 2,2 UNION SELECT * FROM t2;
+select found_rows();
+
+# Test some limits with ORDER BY
+SELECT * FROM t1 UNION SELECT * FROM t2 ORDER BY a desc LIMIT 1;
+(SELECT * FROM t1 ORDER by a) UNION ALL (SELECT * FROM t2 ORDER BY a) ORDER BY A desc LIMIT 4;
+
+# Wrong usage
+--error 1234
+(SELECT * FROM t1) UNION all (SELECT SQL_CALC_FOUND_ROWS * FROM t2) LIMIT 1;
+
+drop table t1,t2;
+
+#
 # Test for another bug with UNION and LEFT JOIN
 #
 CREATE TABLE t1 (  id int(3) unsigned default '0') TYPE=MyISAM;