mirror of https://github.com/postgres/postgres
60 lines
1.2 KiB
MySQL
60 lines
1.2 KiB
MySQL
--
|
|
-- PostgreSQL code for LargeObjects
|
|
--
|
|
-- $Id: lo.sql.in,v 1.2 2000/05/29 01:59:02 tgl Exp $
|
|
--
|
|
|
|
load '_OBJWD_/lo_DLSUFFIX_';
|
|
|
|
--
|
|
-- Create the data type
|
|
--
|
|
|
|
-- used by the lo type, it takes an oid and returns an lo object
|
|
create function lo_in(opaque)
|
|
returns opaque
|
|
as '_OBJWD_/lo_DLSUFFIX_'
|
|
language 'c';
|
|
|
|
-- used by the lo type, it returns the oid of the object
|
|
create function lo_out(opaque)
|
|
returns opaque
|
|
as '_OBJWD_/lo_DLSUFFIX_'
|
|
language 'c';
|
|
|
|
-- finally the type itself
|
|
create type lo (
|
|
internallength = 4,
|
|
externallength = variable,
|
|
input = lo_in,
|
|
output = lo_out
|
|
);
|
|
|
|
-- this returns the oid associated with a lo object
|
|
create function lo_oid(lo)
|
|
returns oid
|
|
as '_OBJWD_/lo_DLSUFFIX_'
|
|
language 'c';
|
|
|
|
-- this allows us to convert an oid to a managed lo object
|
|
-- ie: insert into test values (lo_import('/fullpath/file')::lo);
|
|
create function lo(oid)
|
|
returns lo
|
|
as '_OBJWD_/lo_DLSUFFIX_'
|
|
language 'c';
|
|
|
|
-- This is used in triggers
|
|
create function lo_manage()
|
|
returns opaque
|
|
as '_OBJWD_/lo_DLSUFFIX_'
|
|
language 'newC';
|
|
|
|
-- This allows us to map lo to oid
|
|
--
|
|
-- eg:
|
|
-- create table a (image lo);
|
|
-- select image::oid from a;
|
|
--
|
|
create function oid(lo) returns oid as 'select lo_oid($1)' language 'sql';
|
|
|