diff --git a/clause/expression.go b/clause/expression.go index 92ac7f223..8d010522f 100644 --- a/clause/expression.go +++ b/clause/expression.go @@ -246,15 +246,19 @@ func (eq Eq) Build(builder Builder) { switch eq.Value.(type) { case []string, []int, []int32, []int64, []uint, []uint32, []uint64, []interface{}: - builder.WriteString(" IN (") rv := reflect.ValueOf(eq.Value) - for i := 0; i < rv.Len(); i++ { - if i > 0 { - builder.WriteByte(',') + if rv.Len() == 0 { + builder.WriteString(" IN (NULL)") + } else { + builder.WriteString(" IN (") + for i := 0; i < rv.Len(); i++ { + if i > 0 { + builder.WriteByte(',') + } + builder.AddVar(builder, rv.Index(i).Interface()) } - builder.AddVar(builder, rv.Index(i).Interface()) + builder.WriteByte(')') } - builder.WriteByte(')') default: if eqNil(eq.Value) { builder.WriteString(" IS NULL") diff --git a/clause/expression_test.go b/clause/expression_test.go index aaede61c5..b997bf11a 100644 --- a/clause/expression_test.go +++ b/clause/expression_test.go @@ -199,6 +199,11 @@ func TestExpression(t *testing.T) { }, ExpectedVars: []interface{}{"a", "b"}, Result: "`column-name` NOT IN (?,?)", + }, { + Expressions: []clause.Expression{ + clause.Eq{Column: column, Value: []string{}}, + }, + Result: "`column-name` IN (NULL)", }, { Expressions: []clause.Expression{ clause.Eq{Column: clause.Expr{SQL: "SUM(?)", Vars: []interface{}{clause.Column{Name: "id"}}}, Value: 100},