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-rw-r--r--mysql-test/r/variables.result5
-rw-r--r--mysql-test/t/variables.test10
-rw-r--r--sql/mysqld.cc3
3 files changed, 16 insertions, 2 deletions
diff --git a/mysql-test/r/variables.result b/mysql-test/r/variables.result
index 67c78d82a24..0aa7ea7f83c 100644
--- a/mysql-test/r/variables.result
+++ b/mysql-test/r/variables.result
@@ -499,3 +499,8 @@ set names latin1;
select @@have_innodb;
@@have_innodb
#
+set @test = @@query_prealloc_size;
+set @@query_prealloc_size = @test;
+select @@query_prealloc_size = @test;
+@@query_prealloc_size = @test
+1
diff --git a/mysql-test/t/variables.test b/mysql-test/t/variables.test
index a8844070207..8322c0f84bd 100644
--- a/mysql-test/t/variables.test
+++ b/mysql-test/t/variables.test
@@ -388,7 +388,6 @@ set character_set_results=NULL;
select ifnull(@@character_set_results,"really null");
set names latin1;
-# End of 4.1 tests
#
# Bug #9613: @@have_innodb
@@ -396,3 +395,12 @@ set names latin1;
--replace_column 1 #
select @@have_innodb;
+
+#
+# Bug #13334: query_prealloc_size default less than minimum
+#
+set @test = @@query_prealloc_size;
+set @@query_prealloc_size = @test;
+select @@query_prealloc_size = @test;
+
+# End of 4.1 tests
diff --git a/sql/mysqld.cc b/sql/mysqld.cc
index a6a91ac32ee..4d5a85e3fdc 100644
--- a/sql/mysqld.cc
+++ b/sql/mysqld.cc
@@ -5280,7 +5280,8 @@ The minimum value for this variable is 4096.",
"Persistent buffer for query parsing and execution",
(gptr*) &global_system_variables.query_prealloc_size,
(gptr*) &max_system_variables.query_prealloc_size, 0, GET_ULONG,
- REQUIRED_ARG, QUERY_ALLOC_PREALLOC_SIZE, 16384, ~0L, 0, 1024, 0},
+ REQUIRED_ARG, QUERY_ALLOC_PREALLOC_SIZE, QUERY_ALLOC_PREALLOC_SIZE,
+ ~0L, 0, 1024, 0},
{"range_alloc_block_size", OPT_RANGE_ALLOC_BLOCK_SIZE,
"Allocation block size for storing ranges during optimization",
(gptr*) &global_system_variables.range_alloc_block_size,