Method ColumnTypeLength

stdlib/sql.go:665–678

ColumnTypeLength returns the length of the column type if the column is a variable length type. If the column is not a variable length type ok should return false.

(index int)

// variable length type. If the column is not a variable length type ok
// should return false.
func (r *Rows) ColumnTypeLength(index int) (int64, bool) {
	fd := r.rows.FieldDescriptions()[index]

	switch fd.DataTypeOID {
	case pgtype.TextOID, pgtype.ByteaOID:
		return math.MaxInt64, true
	case pgtype.VarcharOID, pgtype.BPCharOID:
		return int64(fd.TypeModifier - varHeaderSize), true
	case pgtype.VarbitOID:
		return int64(fd.TypeModifier), true
	default:
		return 0, false
	}
}

// ColumnTypePrecisionScale should return the precision and scale for decimal
// types. If not applicable, ok should be false.