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46 lines
1.3 KiB
C
46 lines
1.3 KiB
C
/*-------------------------------------------------------------------------
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*
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* postgres_ext.h
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*
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* This file contains declarations of things that are visible everywhere
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* in PostgreSQL *and* are visible to clients of frontend interface libraries.
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* For example, the Oid type is part of the API of libpq and other libraries.
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*
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* Declarations which are specific to a particular interface should
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* go in the header file for that interface (such as libpq-fe.h). This
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* file is only for fundamental Postgres declarations.
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*
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* User-written C functions don't count as "external to Postgres."
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* Those function much as local modifications to the backend itself, and
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* use header files that are otherwise internal to Postgres to interface
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* with the backend.
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*
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* $Id$
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef POSTGRES_EXT_H
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#define POSTGRES_EXT_H
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/*
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* Object ID is a fundamental type in Postgres.
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*/
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typedef unsigned int Oid;
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#define InvalidOid ((Oid) 0)
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#define OID_MAX UINT_MAX
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/* you will need to include <limits.h> to use the above #define */
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/*
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* NAMEDATALEN is the max length for system identifiers (e.g. table names,
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* attribute names, function names, etc.)
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*
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* NOTE that databases with different NAMEDATALEN's cannot interoperate!
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*/
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#define NAMEDATALEN 32
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#endif
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