Merge with MySQL 5.1.55

- Fixed some issues with partitions and connection_string, which also fixed lp:716890 "Pre- and post-recovery crash in Aria"
- Fixed wrong assert in Aria

Now need to merge with latest xtradb before pushing 

sql/ha_partition.cc:
  Ensure that m_ordered_rec_buffer is not freed before close.
sql/mysqld.cc:
  Changed to use opt_stack_trace instead of opt_pstack.
  Removed references to pstack
sql/partition_element.h:
  Ensure that connect_string is initialized
storage/maria/ma_key_recover.c:
  Fixed wrong assert

1 files changed, 37 insertions, 0 deletions

diff --git a/mysql-test/t/sp-bugs.test b/mysql-test/t/sp-bugs.test
index 8aa0791e265..fe52632c784 100644
--- a/mysql-test/t/sp-bugs.test
+++ b/mysql-test/t/sp-bugs.test
@@ -101,4 +101,41 @@ CALL p1 ();
 DROP TABLE t1;
 DROP PROCEDURE p1;
 
+--echo #
+--echo # Bug#54375: Error in stored procedure leaves connection
+--echo # in different default schema
+--echo #
+
+--disable_warnings
+SET @@SQL_MODE = 'STRICT_ALL_TABLES';
+DROP DATABASE IF EXISTS db1;
+CREATE DATABASE db1;
+USE db1;
+DROP TABLE IF EXISTS t1;
+CREATE TABLE t1 (c1 int NOT NULL PRIMARY KEY);
+INSERT INTO t1 VALUES (1);
+DELIMITER $$;
+CREATE FUNCTION f1 (
+	some_value int
+)
+RETURNS smallint
+DETERMINISTIC
+BEGIN
+	INSERT INTO t1 SET c1 = some_value;
+        RETURN(LAST_INSERT_ID());
+END$$
+DELIMITER ;$$
+DROP DATABASE IF EXISTS db2;
+CREATE DATABASE db2;
+--enable_warnings
+USE db2;
+SELECT DATABASE();
+--error ER_DUP_ENTRY
+SELECT db1.f1(1);
+SELECT DATABASE();
+USE test;
+DROP FUNCTION db1.f1;
+DROP TABLE db1.t1;
+DROP DATABASE db1;
+DROP DATABASE db2;
 --echo End of 5.1 tests