Merging from mysql-5.1 to mysql-5.5.

mysql-test/suite/innodb/r/innodb.result

@@ -3191,3 +3191,14 @@ Handler_update	1
 Variable_name	Value
 Handler_delete	1
 DROP TABLE bug58912;
+create table t1 (f1 integer primary key) engine=innodb;
+flush status;
+show status like "handler_read_key";
+Variable_name	Value
+Handler_read_key	0
+select f1 from t1;
+f1
+show status like "handler_read_key";
+Variable_name	Value
+Handler_read_key	1
+drop table t1;

mysql-test/suite/innodb/t/innodb.test

@@ -2578,6 +2578,17 @@ SET GLOBAL innodb_thread_concurrency = @innodb_thread_concurrency_orig;
 # Clean up after the Bug#55284/Bug#58912 test case.
 DROP TABLE bug58912;
 
+#
+# Test fix for bug 13117023. InnoDB increments HA_READ_KEY_COUNT (aka
+# HANDLER_READ_KEY) when it should not.
+#
+create table t1 (f1 integer primary key) engine=innodb;
+flush status;
+show status like "handler_read_key";
+select f1 from t1;
+show status like "handler_read_key";
+drop table t1;
+
 #######################################################################
 #                                                                     #
 # Please, DO NOT TOUCH this file as well as the innodb.result file.   #

storage/innobase/handler/ha_innodb.cc

@@ -5792,7 +5792,6 @@ ha_innobase::innobase_get_index(
 	dict_index_t*	index = 0;
 
 	DBUG_ENTER("innobase_get_index");
-	ha_statistic_increment(&SSV::ha_read_key_count);
 
 	if (keynr != MAX_KEY && table->s->keys > 0) {
 		key = table->key_info + keynr;