From 9f2c4f2018f0ce49f3593d0edbe09249415d99be Mon Sep 17 00:00:00 2001
From: Lunny Xiao <xiaolunwen@gmail.com>
Date: Fri, 9 May 2014 12:52:02 +0800
Subject: [PATCH] bug fixed for mssql dialect

---
 mssql_dialect.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/mssql_dialect.go b/mssql_dialect.go
index e2efaf24..ebc35164 100644
--- a/mssql_dialect.go
+++ b/mssql_dialect.go
@@ -112,6 +112,12 @@ func (db *mssql) IndexCheckSql(tableName, idxName string) (string, []interface{}
 	return sql, args
 }*/
 
+func (db *mssql) IsColumnExist(tableName string, col *core.Column) (bool, error) {
+	query := `SELECT "COLUMN_NAME" FROM "INFORMATION_SCHEMA"."COLUMNS" WHERE "TABLE_NAME" = ? AND "COLUMN_NAME" = ?`
+
+	return db.HasRecords(query, tableName, col.Name)
+}
+
 func (db *mssql) TableCheckSql(tableName string) (string, []interface{}) {
 	args := []interface{}{}
 	sql := "select * from sysobjects where id = object_id(N'" + tableName + "') and OBJECTPROPERTY(id, N'IsUserTable') = 1"