pt-osc now limits size of contraint names

t/pt-online-schema-change/samples/bug-1215587.sql

@@ -0,0 +1,23 @@
+/* ----- Create two test tables with FKs for scenario 1 and 2: ----- */
+drop database if exists bug1215587;
+CREATE DATABASE bug1215587;
+USE bug1215587;
+
+CREATE TABLE IF NOT EXISTS `Table1` (
+  `ID` int unsigned NOT NULL AUTO_INCREMENT,
+  `T2ID` smallint unsigned DEFAULT NULL,
+  PRIMARY KEY (`ID`),
+  KEY `tagIndex` (`T2ID`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+
+CREATE TABLE `Table2` (
+  `ID` smallint unsigned NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`ID`)
+) ENGINE=InnoDB DEFAULT CHARSET=latin1;
+
+ALTER TABLE `Table1`
+  ADD CONSTRAINT `fkey1` FOREIGN KEY (`T2ID`) REFERENCES `Table2` (`ID`) ON DELETE NO ACTION;
+
+ALTER TABLE `Table2`
+  ADD CONSTRAINT `fkey2` FOREIGN KEY (`ID`) REFERENCES `Table1` (`T2ID`) ON DELETE NO ACTION;
+