add Support for MySQL: DROP INDEX index_name ON tbl_name

h2/src/main/org/h2/command/Parser.java

@@ -1625,6 +1625,10 @@ public class Parser {
             command.setIndexName(indexName);
             ifExists = readIfExists(ifExists);
             command.setIfExists(ifExists);
+            //Support for MySQL: DROP INDEX index_name ON tbl_name
+            if(readIf("ON")) {
+               	readIdentifierWithSchema();
+            }
             return command;
         } else if (readIf("USER")) {
             boolean ifExists = readIfExists(false);

h2/src/test/org/h2/test/db/TestCompatibility.java

@@ -398,6 +398,7 @@ public class TestCompatibility extends TestBase {
         // check the MySQL index dropping syntax
         stat.execute("ALTER TABLE TEST_COMMENT_ENGINE ADD CONSTRAINT CommentUnique UNIQUE (SOME_ITEM_ID)");
         stat.execute("ALTER TABLE TEST_COMMENT_ENGINE DROP INDEX CommentUnique");
+        stat.execute("DROP INDEX SOME_ITEM_ID ON TEST_COMMENT_ENGINE");
 
         conn.close();
         conn = getConnection("compatibility");