/*------------------------------------------------------------------------- * * postgres_ext.h * * This file contains declarations of things that are visible everywhere * in PostgreSQL *and* are visible to clients of frontend interface libraries. * For example, the Oid type is part of the API of libpq and other libraries. * * Declarations which are specific to a particular interface should * go in the header file for that interface (such as libpq-fe.h). This * file is only for fundamental Postgres declarations. * * User-written C functions don't count as "external to Postgres." * Those function much as local modifications to the backend itself, and * use header files that are otherwise internal to Postgres to interface * with the backend. * * src/include/postgres_ext.h * *------------------------------------------------------------------------- */ #ifndef POSTGRES_EXT_H #define POSTGRES_EXT_H /* * Object ID is a fundamental type in Postgres. */ typedef unsigned int Oid; #ifdef __cplusplus #define InvalidOid (Oid(0)) #else #define InvalidOid ((Oid) 0) #endif #define OID_MAX UINT_MAX /* you will need to include <limits.h> to use the above #define */ /* * Identifiers of error message fields. Kept here to keep common * between frontend and backend, and also to export them to libpq * applications. */ #define PG_DIAG_SEVERITY 'S' #define PG_DIAG_SQLSTATE 'C' #define PG_DIAG_MESSAGE_PRIMARY 'M' #define PG_DIAG_MESSAGE_DETAIL 'D' #define PG_DIAG_MESSAGE_HINT 'H' #define PG_DIAG_STATEMENT_POSITION 'P' #define PG_DIAG_INTERNAL_POSITION 'p' #define PG_DIAG_INTERNAL_QUERY 'q' #define PG_DIAG_CONTEXT 'W' #define PG_DIAG_SOURCE_FILE 'F' #define PG_DIAG_SOURCE_LINE 'L' #define PG_DIAG_SOURCE_FUNCTION 'R' #endif

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