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Change typreceive function API so that receive functions get the same

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optional arguments as text input functions, ie, typioparam OID and
atttypmod.  Make all the datatypes that use typmod enforce it the same
way in typreceive as they do in typinput.  This fixes a problem with
failure to enforce length restrictions during COPY FROM BINARY.
This commit is contained in:
Tom Lane
2005-07-10 21:14:00 +00:00
parent 2e330699fa
commit d78397d301
18 changed files with 333 additions and 144 deletions
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15
doc/src/sgml/ref/create_type.sgml
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@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/create_type.sgml,v 1.55 2005/05/01 18:56:17 tgl Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/create_type.sgml,v 1.56 2005/07/10 21:13:57 tgl Exp $
PostgreSQL documentation
-->
@ -125,12 +125,13 @@ CREATE TYPE <replaceable class="parameter">name</replaceable> (
function should perform adequate checking to ensure that the value is
valid.
The receive function may be declared as taking one argument of type
<type>internal</type>, or two arguments of types <type>internal</type>
and <type>oid</type>. It must return a value of the data type itself.
(The first argument is a pointer to a <type>StringInfo</type> buffer
holding the received byte string; the optional second argument is the
element type OID in case this is an array type, or the type's own OID for a
composite type.) Similarly, the optional
<type>internal</type>, or as taking three arguments of types
<type>internal</type>, <type>oid</type>, <type>integer</type>.
The first argument is a pointer to a <type>StringInfo</type> buffer
holding the received byte string; the optional arguments are the
same as for the text input function.
The receive function must return a value of the data type itself.
Similarly, the optional
<replaceable class="parameter">send_function</replaceable> converts
from the internal representation to the external binary representation.
If this function is not supplied, the type cannot participate in binary