Add sql type check on deleted cond

engine.go

@@ -91,12 +91,19 @@ func (engine *Engine) BufferSize(size int) *Session {
 }
 
 // CondDeleted returns the conditions whether a record is soft deleted.
-func (engine *Engine) CondDeleted(colName string) builder.Cond {
-	cond := builder.IsNull{colName}.Or(builder.Eq{colName: 0})
-	if engine.dialect.DBType() == core.MSSQL {
-		return cond
+func (engine *Engine) CondDeleted(col *core.Column) builder.Cond {
+	var cond builder.Cond
+	if col.SQLType.IsNumeric() {
+		cond = builder.Eq{col.Name: 0}
+	} else {
+		cond = builder.Eq{col.Name: zeroTime1}
 	}
-	return cond.Or(builder.Eq{colName: zeroTime1})
+
+	if col.Nullable {
+		cond = cond.Or(builder.IsNull{col.Name})
+	}
+
+	return cond
 }
 
 // ShowSQL show SQL statement or not on logger if log level is great than INFO

engine_cond.go

@@ -58,7 +58,7 @@ func (engine *Engine) buildConds(table *core.Table, bean interface{},
 		}
 
 		if col.IsDeleted && !unscoped { // tag "deleted" is enabled
-			conds = append(conds, engine.CondDeleted(colName))
+			conds = append(conds, engine.CondDeleted(col))
 		}
 
 		fieldValue := *fieldValuePtr

session_find.go

@@ -121,7 +121,7 @@ func (session *Session) find(rowsSlicePtr interface{}, condiBean ...interface{})
 					colName = session.engine.Quote(nm) + "." + colName
 				}
 
-				autoCond = session.engine.CondDeleted(colName)
+				autoCond = session.engine.CondDeleted(col)
 			}
 		}
 	}

session_update.go

@@ -287,7 +287,7 @@ func (session *Session) Update(bean interface{}, condiBean ...interface{}) (int6
 
 		if !condBeanIsStruct && table != nil {
 			if col := table.DeletedColumn(); col != nil && !session.statement.unscoped { // tag "deleted" is enabled
-				autoCond1 := session.engine.CondDeleted(session.engine.Quote(col.Name))
+				autoCond1 := session.engine.CondDeleted(col)
 
 				if autoCond == nil {
 					autoCond = autoCond1