Merge damien-katzs-computer.local:/Users/dkatz/mysql50

into  damien-katzs-computer.local:/Users/dkatz/mysql51


mysql-test/r/udf.result:
  Auto merged
mysql-test/t/udf.test:
  Auto merged
sql/sql_yacc.yy:
  This line that marks the expression as unsafe for caching now belongs in the create() methods for builder objects inheriting from Create_func.

mysql-test/r/udf.result

@@ -311,4 +311,27 @@ drop function f3;
 drop function metaphon;
 drop function myfunc_double;
 drop function myfunc_int;
+CREATE FUNCTION metaphon RETURNS STRING SONAME "UDF_EXAMPLE_LIB";
+create table t1 (a char);
+set GLOBAL query_cache_size=1355776;
+reset query cache;
+select metaphon('MySQL') from t1;
+metaphon('MySQL')
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	0
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	0
+select metaphon('MySQL') from t1;
+metaphon('MySQL')
+show status like "Qcache_hits";
+Variable_name	Value
+Qcache_hits	0
+show status like "Qcache_queries_in_cache";
+Variable_name	Value
+Qcache_queries_in_cache	0
+drop table t1;
+drop function metaphon;
+set GLOBAL query_cache_size=default;
 End of 5.0 tests.

mysql-test/t/udf.test

@@ -340,4 +340,28 @@ drop function metaphon;
 drop function myfunc_double;
 drop function myfunc_int;
 
+#
+# Bug #28921: Queries containing UDF functions are cached
+#
+
+--replace_result $UDF_EXAMPLE_LIB UDF_EXAMPLE_LIB
+eval CREATE FUNCTION metaphon RETURNS STRING SONAME "$UDF_EXAMPLE_LIB";
+create table t1 (a char);
+
+set GLOBAL query_cache_size=1355776;
+reset query cache;
+
+select metaphon('MySQL') from t1;
+show status like "Qcache_hits";
+show status like "Qcache_queries_in_cache";
+
+select metaphon('MySQL') from t1;
+show status like "Qcache_hits";
+show status like "Qcache_queries_in_cache";
+
+drop table t1;
+drop function metaphon;
+set GLOBAL query_cache_size=default;
+
+
 --echo End of 5.0 tests.