Move OID to pgtype

pgtype/oid.go

@@ -0,0 +1,41 @@
+package pgtype
+
+import (
+	"io"
+)
+
+// OID (Object Identifier Type) is, according to
+// https://www.postgresql.org/docs/current/static/datatype-oid.html, used
+// internally by PostgreSQL as a primary key for various system tables. It is
+// currently implemented as an unsigned four-byte integer. Its definition can be
+// found in src/include/postgres_ext.h in the PostgreSQL sources.
+type OID pguint32
+
+// ConvertFrom converts from src to dst. Note that as OID is not a general
+// number type ConvertFrom does not do automatic type conversion as other number
+// types do.
+func (dst *OID) ConvertFrom(src interface{}) error {
+	return (*pguint32)(dst).ConvertFrom(src)
+}
+
+// AssignTo assigns from src to dst. Note that as OID is not a general number
+// type AssignTo does not do automatic type conversion as other number types do.
+func (src *OID) AssignTo(dst interface{}) error {
+	return (*pguint32)(src).AssignTo(dst)
+}
+
+func (dst *OID) DecodeText(r io.Reader) error {
+	return (*pguint32)(dst).DecodeText(r)
+}
+
+func (dst *OID) DecodeBinary(r io.Reader) error {
+	return (*pguint32)(dst).DecodeBinary(r)
+}
+
+func (src OID) EncodeText(w io.Writer) error {
+	return (pguint32)(src).EncodeText(w)
+}
+
+func (src OID) EncodeBinary(w io.Writer) error {
+	return (pguint32)(src).EncodeBinary(w)
+}