增加mysql存储过程LOOP,REPAET,LEAVE,ITEARATE语法支持,以及支持BEGIN-END和WHILE语句标签支持

src/main/java/com/alibaba/druid/sql/parser/Keywords.java

@@ -139,7 +139,12 @@ public class Keywords {
         map.put("WHILE", Token.WHILE);
         map.put("DO", Token.DO);
         map.put("DECLARE", Token.DECLARE);
-
+        map.put("LOOP", Token.LOOP);
+        map.put("LEAVE", Token.LEAVE);
+        map.put("ITERATE", Token.ITERATE);
+        map.put("REPEAT", Token.REPEAT);
+        map.put("UNTIL", Token.UNTIL);
+        
         DEFAULT_KEYWORDS = new Keywords(map);
     }
 

src/main/java/com/alibaba/druid/sql/parser/Token.java

@@ -131,6 +131,10 @@ public enum Token {
     // MySql procedure by:zz
     WHILE("WHILE"),
     DO("DO"),
+    LEAVE("LEAVE"),
+    ITERATE("ITERATE"),
+    REPEAT("REPEAT"),
+    UNTIL("UNTIL"),
     
     //postgresql
     WINDOW("WINDOW"),