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PQregisterSubClasses(3) libpqtypes Manual PQregisterSubClasses(3)
PQregisterSubClasses - Registers a type aliases or sub-classes.
int PQregisterSubClasses(PGconn *conn, PGregisterType *types,
THIS FUNCTION IS DEPRECATED. New applications should use
PQregisterTypes. This function is now a wrapper to PQregisterTypes.
The PQregisterSubClasses() function allows an application to register
an alias or sub-class of another type.
The types argument is an array containing count sub class types to
register. The typname member of the PGregisterType structure must
specify an inheritence relationship: ex. "myint=int4" where myint
inherits from int4. The '=' is called the inheritence operator. If
both typput and typget members of the PGregisterType structure are
NULL, the type at that element will behave identically to the type it
is inheriting from; an alias. Otherwise, the base type's put and/or
get routines will be overridden.
NOTE: The typname member of the PGregisterType structure can optionally
contain the type's schema: schema.typname.
WARNING: PQparamCreate is only aware of types that have already been
registered. If you need to put a type into a param, make sure it is
On success, a non-zero value is returned. On error, zero is returned
and PQgeterror(3) will contain an error message.
A contribution of eSilo, LLC. for the PostgreSQL Database Management
System. Written by Andrew Chernow and Merlin Moncure.
Report bugs to <email@example.com>.
Copyright (c) 2011 eSilo, LLC. All rights reserved.
This is free software; see the source for copying conditions. There is
NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR
pqt-handlers(3), PQputf(3), PQgetf(3)
libpqtypes 2011 PQregisterSubClasses(3)