improve monitor-support

src/main/java/com/alibaba/druid/wall/WallSqlStat.java

@@ -44,6 +44,8 @@ public class WallSqlStat {
 
     private String                                   sample;
 
+    private long                                     sqlHash;
+
     public WallSqlStat(Map<String, WallSqlTableStat> tableStats, Map<String, WallSqlFunctionStat> functionStats,
                        boolean syntaxError){
         this(tableStats, functionStats, Collections.<Violation> emptyList(), syntaxError);
@@ -57,6 +59,14 @@ public class WallSqlStat {
         this.syntaxError = syntaxError;
     }
 
+    public long getSqlHash() {
+        return sqlHash;
+    }
+
+    public void setSqlHash(long sqlHash) {
+        this.sqlHash = sqlHash;
+    }
+
     public String getSample() {
         return sample;
     }