diff --git a/.travis.yml b/.travis.yml
index fce509b1866ef126f7089c997f643c761d278e94..d3adb24d2e7c176b835c9299eda50d48eab09842 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -7,3 +7,4 @@ before_script:
   - echo "MAVEN_OPTS='-Xmx1024m -XX:MaxPermSize=256m'" > ~/.mavenrc
 after_success:
   - mvn clean cobertura:cobertura coveralls:report
+dist: precise
diff --git a/sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/statement/update/AbstractUpdateParser.java b/sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/statement/update/AbstractUpdateParser.java
index efe23a7683960968c3551379b02241d57dfacd3f..5a56d962a9a1a1d33040aabf093e7e5971a2bd0d 100644
--- a/sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/statement/update/AbstractUpdateParser.java
+++ b/sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/statement/update/AbstractUpdateParser.java
@@ -68,20 +68,28 @@ public abstract class AbstractUpdateParser implements SQLStatementParser {
     }
     
     private void parseSetItem() {
+        parseSetColumn();
+        sqlParser.skipIfEqual(Symbol.EQ, Symbol.COLON_EQ);
+        parseSetValue();
+    }
+    
+    private void parseSetColumn() {
         if (sqlParser.equalAny(Symbol.LEFT_PAREN)) {
             sqlParser.skipParentheses();
-        } else {
-            int beginPosition = sqlParser.getLexer().getCurrentToken().getEndPosition();
-            String literals = sqlParser.getLexer().getCurrentToken().getLiterals();
-            sqlParser.getLexer().nextToken();
-            if (sqlParser.skipIfEqual(Symbol.DOT)) {
-                if (updateStatement.getTables().getSingleTableName().equalsIgnoreCase(SQLUtil.getExactlyValue(literals))) {
-                    updateStatement.getSqlTokens().add(new TableToken(beginPosition - literals.length(), literals));
-                }
-                sqlParser.getLexer().nextToken();
+            return;
+        }
+        int beginPosition = sqlParser.getLexer().getCurrentToken().getEndPosition();
+        String literals = sqlParser.getLexer().getCurrentToken().getLiterals();
+        sqlParser.getLexer().nextToken();
+        if (sqlParser.skipIfEqual(Symbol.DOT)) {
+            if (updateStatement.getTables().getSingleTableName().equalsIgnoreCase(SQLUtil.getExactlyValue(literals))) {
+                updateStatement.getSqlTokens().add(new TableToken(beginPosition - literals.length(), literals));
             }
+            sqlParser.getLexer().nextToken();
         }
-        sqlParser.skipIfEqual(Symbol.EQ, Symbol.COLON_EQ);
+    }
+    
+    private void parseSetValue() {
         sqlParser.parseExpression(updateStatement);
         parametersIndex = sqlParser.getParametersIndex();
     }