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src/backend/access/tablesample/tablesample.c
40 строк
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Bruce Momjian
Update copyright for 2026
01 янв 2026, 21:24
01 янв 2026, 21:24
451c439
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/*------------------------------------------------------------------------- * * tablesample.c * Support functions for TABLESAMPLE feature * * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group * Portions Copyright (c) 1994, Regents of the University of California * * * IDENTIFICATION * src/backend/access/tablesample/tablesample.c * * ------------------------------------------------------------------------- */ #include "postgres.h" #include "access/tsmapi.h" /* * GetTsmRoutine --- get a TsmRoutine struct by invoking the handler. * * This is a convenience routine that's just meant to check for errors. */ TsmRoutine * GetTsmRoutine(Oid tsmhandler) { Datum datum; TsmRoutine *routine; datum = OidFunctionCall1(tsmhandler, PointerGetDatum(NULL)); routine = (TsmRoutine *) DatumGetPointer(datum); if (routine == NULL || !IsA(routine, TsmRoutine)) elog(ERROR, "tablesample handler function %u did not return a TsmRoutine struct", tsmhandler); return routine; }