Function DecodePrecisionScale

pgtypes/pgtypes.go:461–471

(typmod int)

func (p PostgresType) String() string {
	return fmt.Sprintf("PostgresType(%s)", p.PG.Name)
}

func DecodePrecisionScale(typmod int) (precision, scale int32, ok bool) {
	if typmod > 0 {
		typmod -= 4 // remove VARHDRSZ
		precision = int32((typmod >> 16) & 0xFFFF)
		scale = int32(typmod & 0xFFFF)
		ok = true
	}
	// The max precision is 131072, which is larger than the max int16 value.
	// Therefore, if the precision is larger than the max int16 value, we default to unknown precision and scale.
	return
}