57 lines
1.2 KiB
MySQL
57 lines
1.2 KiB
MySQL
--
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-- PostgreSQL code for LargeObjects
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--
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-- $Id: lo.sql.in,v 1.6 2000/11/21 21:51:58 tgl Exp $
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--
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--
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-- Create the data type
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--
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-- used by the lo type, it takes an oid and returns an lo object
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create function lo_in(opaque)
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returns opaque
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as 'MODULE_PATHNAME'
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language 'c';
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-- used by the lo type, it returns the oid of the object
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create function lo_out(opaque)
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returns opaque
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as 'MODULE_PATHNAME'
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language 'c';
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-- finally the type itself
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create type lo (
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internallength = 4,
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externallength = variable,
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input = lo_in,
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output = lo_out
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);
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-- this returns the oid associated with a lo object
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create function lo_oid(lo)
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returns oid
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as 'MODULE_PATHNAME'
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language 'c';
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-- same function, named to allow it to be used as a type coercion, eg:
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-- create table a (image lo);
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-- select image::oid from a;
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--
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create function oid(lo)
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returns oid
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as 'MODULE_PATHNAME', 'lo_oid'
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language 'c';
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-- this allows us to convert an oid to a managed lo object
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-- ie: insert into test values (lo_import('/fullpath/file')::lo);
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create function lo(oid)
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returns lo
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as 'MODULE_PATHNAME'
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language 'c';
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-- This is used in triggers
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create function lo_manage()
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returns opaque
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as 'MODULE_PATHNAME'
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language 'c';
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