Bug #30036: SHOW TABLE TYPES causes the debug client to crash

SHOW TABLE TYPES is a (to be deprecated) synonym for 
SHOW STORAGE ENGINES.
Fixed to use the right schema table in addition to 
issuing a warning.

mysql-test/r/show_check.result

@@ -1351,4 +1351,5 @@ DROP PROCEDURE p1;
 DROP FUNCTION f1;
 DROP TABLE t1;
 DROP EVENT ev1;
+SHOW TABLE TYPES;
 End of 5.1 tests

mysql-test/t/show_check.test

@@ -977,4 +977,12 @@ DROP FUNCTION f1;
 DROP TABLE t1;
 DROP EVENT ev1;
 
+#
+# Bug #30036: SHOW TABLE TYPES causes the debug client to crash
+#
+--disable_result_log
+SHOW TABLE TYPES;
+--enable_result_log
+
+
 --echo End of 5.1 tests

sql/sql_yacc.yy

@@ -8729,6 +8729,8 @@ show_param:
 	    LEX *lex=Lex;
 	    lex->sql_command= SQLCOM_SHOW_STORAGE_ENGINES;
 	    WARN_DEPRECATED(yythd, "5.2", "SHOW TABLE TYPES", "'SHOW [STORAGE] ENGINES'");
+            if (prepare_schema_table(YYTHD, lex, 0, SCH_ENGINES))
+              MYSQL_YYABORT;
 	  }
 	| opt_storage ENGINES_SYM
 	  {