Fix for BUG#24293: '\Z' token is not handled correctly in views.

If SELECT-part of CREATE VIEW statement contains '\Z',
it is not handled correctly.

The problem was in String::print().
Symbol with code 032 (26) is replaced with '\z',
which is not supported by the lexer.

The fix is to replace the symbol with '\Z'.

mysql-test/r/view.result

@@ -3014,4 +3014,13 @@ i	j
 6	3
 DROP VIEW v1, v2;
 DROP TABLE t1;
+DROP VIEW IF EXISTS v1;
+CREATE VIEW v1 AS SELECT 'The\ZEnd';
+SELECT * FROM v1;
+TheEnd
+TheEnd
+SHOW CREATE VIEW v1;
+View	Create View
+v1	CREATE ALGORITHM=UNDEFINED DEFINER=`root`@`localhost` SQL SECURITY DEFINER VIEW `v1` AS select _latin1'The\ZEnd' AS `TheEnd`
+DROP VIEW v1;
 End of 5.0 tests.

mysql-test/t/view.test

@@ -2960,4 +2960,19 @@ DROP VIEW v1, v2;
 DROP TABLE t1;
 
 
+#
+# BUG#24293: '\Z' token is not handled correctly in views
+#
+
+--disable_warnings
+DROP VIEW IF EXISTS v1;
+--enable_warnings
+
+CREATE VIEW v1 AS SELECT 'The\ZEnd';
+SELECT * FROM v1;
+
+SHOW CREATE VIEW v1;
+
+DROP VIEW v1;
+
 --echo End of 5.0 tests.

sql/sql_string.cc

@@ -1033,8 +1033,8 @@ void String::print(String *str)
     case '\r':
       str->append(STRING_WITH_LEN("\\r"));
       break;
-    case 26: //Ctrl-Z
-      str->append(STRING_WITH_LEN("\\z"));
+    case '\032': // Ctrl-Z
+      str->append(STRING_WITH_LEN("\\Z"));
       break;
     default:
       str->append(c);