From 5b1a15a644522fa342b6ccffe66242876c76f583 Mon Sep 17 00:00:00 2001
From: "tianzhen.wtz" <tianzhen.wtz@alibaba-inc.com>
Date: Tue, 30 Dec 2014 11:46:00 +0800
Subject: [PATCH] override equals hashcode

---
 .../dialect/postgresql/ast/expr/PGIntervalExpr.java   | 11 +++++++++--
 1 file changed, 9 insertions(+), 2 deletions(-)

diff --git a/src/main/java/com/alibaba/druid/sql/dialect/postgresql/ast/expr/PGIntervalExpr.java b/src/main/java/com/alibaba/druid/sql/dialect/postgresql/ast/expr/PGIntervalExpr.java
index b5840689a2..ca48f7a750 100644
--- a/src/main/java/com/alibaba/druid/sql/dialect/postgresql/ast/expr/PGIntervalExpr.java
+++ b/src/main/java/com/alibaba/druid/sql/dialect/postgresql/ast/expr/PGIntervalExpr.java
@@ -31,12 +31,19 @@ public class PGIntervalExpr extends SQLExprImpl implements SQLLiteralExpr,PGExpr
 
     @Override
     public boolean equals(Object o) {
-        return false;
+        if (this == o) return true;
+        if (o == null || getClass() != o.getClass()) return false;
+
+        PGIntervalExpr that = (PGIntervalExpr) o;
+
+        if (value != null ? !value.equals(that.value) : that.value != null) return false;
+
+        return true;
     }
 
     @Override
     public int hashCode() {
-        return 0;
+        return value != null ? value.hashCode() : 0;
     }
 
     @Override