diff --git a/RELEASE-NOTES.md b/RELEASE-NOTES.md
index 4f99b57b7776b13994280e793527261c80862e64..c5fccae9f018f20061ad1292a536cc4b57dba95b 100644
--- a/RELEASE-NOTES.md
+++ b/RELEASE-NOTES.md
@@ -3,6 +3,7 @@
 ### 缺陷修正
 
 1. [ISSUE #334](https://github.com/dangdangdotcom/sharding-jdbc/issues/334) 解析有函数的ORDER BY会将后面的ASC, DESC解析到OrderItem的name属性中
+1. [ISSUE #335](https://github.com/dangdangdotcom/sharding-jdbc/issues/335) 支持GROUP BY + 自定义函数的SQL
 
 ## 1.5.1
 
diff --git a/sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/statement/dql/select/AbstractSelectParser.java b/sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/statement/dql/select/AbstractSelectParser.java
index 812b482b422f320f8afb62e3418c1976e571bb05..4614d316a4ef2243ad0298152f7421cc86ce002b 100755
--- a/sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/statement/dql/select/AbstractSelectParser.java
+++ b/sharding-jdbc-core/src/main/java/com/dangdang/ddframe/rdb/sharding/parsing/parser/statement/dql/select/AbstractSelectParser.java
@@ -140,18 +140,22 @@ public abstract class AbstractSelectParser implements SQLStatementParser {
             selectStatement.getItems().add(parseRowNumberSelectItem());
             return;
         }
-        String literals = sqlParser.getLexer().getCurrentToken().getLiterals();
-        if (Symbol.STAR.getLiterals().equals(SQLUtil.getExactlyValue(literals))) {
+        if (isStarSelectItem()) {
             selectStatement.getItems().add(parseStarSelectItem());
             return;
         }
         if (isAggregationSelectItem()) {
-            selectStatement.getItems().add(parseAggregationSelectItem(literals));
+            selectStatement.getItems().add(parseAggregationSelectItem());
             return;
         }
         StringBuilder expression = new StringBuilder();
         Token lastToken = null;
         while (!sqlParser.equalAny(DefaultKeyword.AS) && !sqlParser.equalAny(Symbol.COMMA) && !sqlParser.equalAny(DefaultKeyword.FROM) && !sqlParser.equalAny(Assist.END)) {
+            if (sqlParser.equalAny(Symbol.LEFT_PAREN)) {
+                expression.append(sqlParser.skipParentheses());
+                lastToken = sqlParser.getLexer().getCurrentToken();
+                continue;
+            }
             String value = sqlParser.getLexer().getCurrentToken().getLiterals();
             int position = sqlParser.getLexer().getCurrentToken().getEndPosition() - value.length();
             expression.append(value);
@@ -180,6 +184,10 @@ public abstract class AbstractSelectParser implements SQLStatementParser {
         throw new UnsupportedOperationException("Cannot support special select item.");
     }
     
+    private boolean isStarSelectItem() {
+        return Symbol.STAR.getLiterals().equals(SQLUtil.getExactlyValue(sqlParser.getLexer().getCurrentToken().getLiterals()));
+    }
+    
     private SelectItem parseStarSelectItem() {
         if (!containSubquery) {
             containStarForOutQuery = true;
@@ -190,11 +198,13 @@ public abstract class AbstractSelectParser implements SQLStatementParser {
     }
     
     private boolean isAggregationSelectItem() {
-        return sqlParser.skipIfEqual(DefaultKeyword.MAX, DefaultKeyword.MIN, DefaultKeyword.SUM, DefaultKeyword.AVG, DefaultKeyword.COUNT);
+        return sqlParser.equalAny(DefaultKeyword.MAX, DefaultKeyword.MIN, DefaultKeyword.SUM, DefaultKeyword.AVG, DefaultKeyword.COUNT);
     }
     
-    private SelectItem parseAggregationSelectItem(final String literals) {
-        return new AggregationSelectItem(AggregationType.valueOf(literals.toUpperCase()), sqlParser.skipParentheses(), sqlParser.parseAlias());
+    private SelectItem parseAggregationSelectItem() {
+        AggregationType aggregationType = AggregationType.valueOf(sqlParser.getLexer().getCurrentToken().getLiterals().toUpperCase());
+        sqlParser.getLexer().nextToken();
+        return new AggregationSelectItem(aggregationType, sqlParser.skipParentheses(), sqlParser.parseAlias());
     }
     
     private boolean hasAlias(final StringBuilder expression, final Token lastToken) {
@@ -308,6 +318,9 @@ public abstract class AbstractSelectParser implements SQLStatementParser {
         } else if (sqlExpression instanceof SQLIdentifierExpression) {
             SQLIdentifierExpression sqlIdentifierExpression = (SQLIdentifierExpression) sqlExpression;
             orderItem = new OrderItem(SQLUtil.getExactlyValue(sqlIdentifierExpression.getName()), orderByType, getAlias(SQLUtil.getExactlyValue(sqlIdentifierExpression.getName())));
+        } else if (sqlExpression instanceof SQLIgnoreExpression) {
+            SQLIgnoreExpression sqlIgnoreExpression = (SQLIgnoreExpression) sqlExpression;
+            orderItem = new OrderItem(sqlIgnoreExpression.getExpression(), orderByType, getAlias(sqlIgnoreExpression.getExpression()));
         } else {
             return;
         }