Polish contribution

Issue: SPR-17120

Author: sbrannen

spring-jdbc/src/main/java/org/springframework/jdbc/datasource/init/ScriptUtils.java

@@ -344,25 +344,26 @@ private static void appendSeparatorToScriptIfNecessary(StringBuilder scriptBuild
 	public static boolean containsSqlScriptDelimiters(String script, String delim) {
 		boolean inLiteral = false;
 		boolean inEscape = false;
-		for (int i = 0; i < script.length(); i++) {
 
+		for (int i = 0; i < script.length(); i++) {
 			char c = script.charAt(i);
-			if (c == '\\') {
-				inEscape = !inEscape;
+			if (inEscape) {
+				inEscape = false;
 				continue;
 			}
-			else if (inEscape) {
-				inEscape = false;
+			// MySQL style escapes
+			if (c == '\\') {
+				inEscape = true;
 				continue;
 			}
-
 			if (c == '\'') {
 				inLiteral = !inLiteral;
 			}
 			if (!inLiteral && script.startsWith(delim, i)) {
 				return true;
 			}
 		}
+
 		return false;
 	}
 

spring-jdbc/src/test/java/org/springframework/jdbc/datasource/init/ScriptUtilsUnitTests.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2016 the original author or authors.
+ * Copyright 2002-2018 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -166,12 +166,16 @@ public void readAndSplitScriptContainingMuliLineComments() throws Exception {
 	public void containsDelimiters() {
 		assertFalse(containsSqlScriptDelimiters("select 1\n select ';'", ";"));
 		assertTrue(containsSqlScriptDelimiters("select 1; select 2", ";"));
+
 		assertFalse(containsSqlScriptDelimiters("select 1; select '\\n\n';", "\n"));
 		assertTrue(containsSqlScriptDelimiters("select 1\n select 2", "\n"));
+		
 		assertFalse(containsSqlScriptDelimiters("select 1\n select 2", "\n\n"));
 		assertTrue(containsSqlScriptDelimiters("select 1\n\n select 2", "\n\n"));
-		assertTrue(containsSqlScriptDelimiters("insert into users(first_name, last_name)\nvalues('Charles', 'd\\'Artagnan');", ";"));
+
+		// MySQL style escapes '\\'
 		assertFalse(containsSqlScriptDelimiters("insert into users(first_name, last_name)\nvalues('a\\\\', 'b;')", ";"));
+		assertTrue(containsSqlScriptDelimiters("insert into users(first_name, last_name)\nvalues('Charles', 'd\\'Artagnan'); select 1;", ";"));
 	}
 
 	private String readScript(String path) throws Exception {