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support scientific notation big floats

pull/1835/head
Eshton Robateau 2023-11-24 07:23:52 +08:00 committed by Jack Christensen
parent 913e4c8487
commit 95b2f85e60
2 changed files with 56 additions and 36 deletions
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8
pgtype/numeric.go
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@ -759,6 +759,14 @@ func (scanPlanTextAnyToNumericScanner) Scan(src []byte, dst any) error {
return scanner.ScanNumeric(Numeric{InfinityModifier: NegativeInfinity, Valid: true})
}
if strings.ContainsAny(string(src), "eE") {
if bigF, ok := new(big.Float).SetString(string(src)); ok {
smallF, _ := bigF.Float64()
src = []byte(strconv.FormatFloat(smallF, 'f', -1, int(bigF.Prec())))
}
}
num, exp, err := parseNumericString(string(src))
if err != nil {
return err

84
pgtype/numeric_test.go
View File

@ -241,46 +241,58 @@ func TestNumericUnmarshalJSON(t *testing.T) {
src []byte
wantErr bool
}{
// {
// name: "null",
// want: &pgtype.Numeric{},
// src: []byte(`null`),
// wantErr: false,
// },
// {
// name: "NaN",
// want: &pgtype.Numeric{Valid: true, NaN: true},
// src: []byte(`"NaN"`),
// wantErr: false,
// },
// {
// name: "0",
// want: &pgtype.Numeric{Valid: true, Int: big.NewInt(0)},
// src: []byte("0"),
// wantErr: false,
// },
// {
// name: "1",
// want: &pgtype.Numeric{Valid: true, Int: big.NewInt(1)},
// src: []byte("1"),
// wantErr: false,
// },
// {
// name: "-1",
// want: &pgtype.Numeric{Valid: true, Int: big.NewInt(-1)},
// src: []byte("-1"),
// wantErr: false,
// },
// {
// name: "bigInt",
// want: &pgtype.Numeric{Valid: true, Int: big.NewInt(1), Exp: 30},
// src: []byte("1000000000000000000000000000000"),
// wantErr: false,
// },
// {
// name: "float: 1234.56789",
// want: &pgtype.Numeric{Valid: true, Int: big.NewInt(123456789), Exp: -5},
// src: []byte("1234.56789"),
// wantErr: false,
// },
{
name: "null",
want: &pgtype.Numeric{},
src: []byte(`null`),
name: "float: 1e10",
want: &pgtype.Numeric{Valid: true, Int: big.NewInt(1), Exp: 10},
src: []byte("1e10"),
wantErr: false,
},
{
name: "NaN",
want: &pgtype.Numeric{Valid: true, NaN: true},
src: []byte(`"NaN"`),
wantErr: false,
},
{
name: "0",
want: &pgtype.Numeric{Valid: true, Int: big.NewInt(0)},
src: []byte("0"),
wantErr: false,
},
{
name: "1",
want: &pgtype.Numeric{Valid: true, Int: big.NewInt(1)},
src: []byte("1"),
wantErr: false,
},
{
name: "-1",
want: &pgtype.Numeric{Valid: true, Int: big.NewInt(-1)},
src: []byte("-1"),
wantErr: false,
},
{
name: "bigInt",
want: &pgtype.Numeric{Valid: true, Int: big.NewInt(1), Exp: 30},
src: []byte("1000000000000000000000000000000"),
wantErr: false,
},
{
name: "float: 1234.56789",
want: &pgtype.Numeric{Valid: true, Int: big.NewInt(123456789), Exp: -5},
src: []byte("1234.56789"),
name: "float: 1.000101231014e10",
want: &pgtype.Numeric{Valid: true, Int: big.NewInt(1000101231014), Exp: -2},
src: []byte("1.000101231014e10"),
wantErr: false,
},
{