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add RETURNING option to insert query for postgres #4

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add RETURNING option to insert query for postgres #4

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24 changes: 21 additions & 3 deletions insert.go
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Original file line number Diff line number Diff line change
Expand Up @@ -2,9 +2,10 @@ package sqlbuilder

// InsertStatement represents a INSERT statement.
type InsertStatement struct {
columns ColumnList
values []literal
into Table
columns ColumnList
values []literal
into Table
returning Column

err error
}
Expand Down Expand Up @@ -72,6 +73,18 @@ func (b *InsertStatement) Set(column Column, value interface{}) *InsertStatement
return b
}

func (b *InsertStatement) Returning(column Column) *InsertStatement {
if b.err != nil {
return b
}
if !b.into.hasColumn(column) {
b.err = newError("column not found in FROM.")
return b
}
b.returning = column
return b
}

// ToSql generates query string, placeholder arguments, and returns err on errors.
func (b *InsertStatement) ToSql() (query string, args []interface{}, err error) {
bldr := newBuilder()
Expand Down Expand Up @@ -119,5 +132,10 @@ func (b *InsertStatement) ToSql() (query string, args []interface{}, err error)
bldr.AppendItems(values, ", ")
bldr.Append(" )")

if b.returning != nil {
bldr.Append(" RETURNING ")
bldr.AppendItem(b.returning)
}

return
}
7 changes: 7 additions & 0 deletions insert_test.go
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Expand Up @@ -46,6 +46,13 @@ func TestInsert(t *testing.T) {
query: `INSERT INTO "TABLE_A" ( "str", "bool", "float", "date", "bytes" ) VALUES ( ?, ?, ?, ?, ? );`,
args: []interface{}{"hoge", true, 0.1, time.Unix(0, 0).UTC(), []byte{0x01}},
errmsg: "",
}, {
stmt: Insert(table1).
Set(table1.C("str"), "x").
Returning(table1.C("id")),
query: `INSERT INTO "TABLE_A" ( "str" ) VALUES ( ? ) RETURNING "TABLE_A"."id";`,
args: []interface{}{"x"},
errmsg: "",
}, {
stmt: Insert(table1).Values(1, "hoge", true, 0.1, time.Unix(0, 0).UTC(), []byte{0x01}),
query: `INSERT INTO "TABLE_A" ( "id", "str", "bool", "float", "date", "bytes" ) VALUES ( ?, ?, ?, ?, ?, ? );`,
Expand Down