Update Gbase

Src/Asp.NetCore2/SqlSugar.GBaseCore/GBase/DbMaintenance/GBaseDbMaintenance.cs

@@ -158,7 +158,7 @@ where a.tabtype in ('V')  and not (a.tabname like 'sys%') AND a.tabname <>'dual'
         {
             get
             {
-                return "DROP TABLE {0}";
+                return "DROP TABLE IF EXISTS {0}";
             }
         }
         protected override string DropColumnToTableSql

Src/Asp.NetCore2/SqlSugar.GBaseCore/GBase/SqlBuilder/GBaseFastBuilder.cs

@@ -15,6 +15,7 @@ namespace SqlSugar.GBase
         public bool IsActionUpdateColumns { get; set; }
 
         private DataTable _schema = null;
+        private string _temp_table_prefix = "Temp_GBASE_C2B986DE_EF71_4173_8632_D615B2543D30";
         public DbFastestProperties DbFastestProperties { get; set; } = new DbFastestProperties()
         {
             IsMerge = true
@@ -40,12 +41,14 @@ namespace SqlSugar.GBase
             var dts = dt.Columns.Cast<DataColumn>().Select(it => sqlBuilder.GetTranslationColumnName(it.ColumnName)).ToList();
 
             var oldTableName = dt.TableName;
-            dt.TableName = "Temp" + SnowFlakeSingle.instance.getID().ToString();
+            dt.TableName = _temp_table_prefix + SnowFlakeSingle.instance.getID().ToString();
             var sql = this.Context.Queryable<T>().AS(oldTableName).Where(it => false).Select(string.Join(",", dts)).ToSql().Key;
             await this.Context.Ado.ExecuteCommandAsync($"CREATE TABLE {dt.TableName} AS {sql} ");
         }
 
         public async Task<int> ExecuteBulkCopyAsync(DataTable dt)
+        {
+            try
             {
                 foreach (var item in this.FastEntityInfo.Columns)
                 {
@@ -73,12 +76,19 @@ namespace SqlSugar.GBase
 
                 return result;
             }
+            catch (Exception ex)
+            {
+                this.DropTempTable(dt.TableName);
+                throw ex;
+            }
+        }
 
         public async Task<int> UpdateByTempAsync(string tableName, string tempName, string[] updateColumns, string[] whereColumns)
         {
             Check.ArgumentNullException(!updateColumns.Any(), "update columns count is 0");
             Check.ArgumentNullException(!whereColumns.Any(), "where columns count is 0");
-
+            try
+            {
                 var cn = this.Context.Ado.Connection as GbsConnection;
                 Open(cn);
 
@@ -104,10 +114,18 @@ WHEN MATCHED THEN
 
                 return await this.Context.Ado.ExecuteCommandAsync(sql);
             }
+            catch (Exception ex)
+            {
+                this.DropTempTable(tempName);
+                throw ex;
+            }
+        }
 
         public async Task<int> Merge<T>(string tableName, DataTable dt, EntityInfo entityInfo, string[] whereColumns, string[] updateColumns, List<T> datas) where T : class, new()
         {
             Check.Exception(this.FastEntityInfo.Columns.Any(it => it.OracleSequenceName.HasValue()), "The BulkMerge method cannot be used for  sequence", "BulkMerge方法不能用序列");
+            try
+            {
                 var sqlBuilder = this.Context.Queryable<object>().SqlBuilder;
                 var insertColumns = entityInfo.Columns
                     .Where(it => it.IsIgnore == false)
@@ -149,9 +167,14 @@ WHEN MATCHED THEN
 WHEN NOT MATCHED THEN
     INSERT ({insertColumnsSqlTgt})
     VALUES ({insertColumnsSqlsrc})";
-
                 return await this.Context.Ado.ExecuteCommandAsync(sql);
             }
+            catch (Exception ex)
+            {
+                this.DropTempTable(dt.TableName);
+                throw ex;
+            }
+        }
 
         private void SetupSchemaTable(GbsConnection cn, IDbTransaction transaction, string table_name)
         {
@@ -360,5 +383,14 @@ WHEN NOT MATCHED THEN
                 cn.Open();
             }
         }
+
+        private void DropTempTable(string tableName)
+        {
+            if (tableName.StartsWith(_temp_table_prefix))
+            {
+                // it is a temp table.
+                this.Context.DbMaintenance.DropTable(tableName);
+            }
+        }
     }
 }