greenplumn heap_checksum_helper 代码
文件路径：/src/test/heap_checksum/heap_checksum_helper.c
#include "postgres.h"
#include "funcapi.h"
#include "nodes/pg_list.h"
#include "storage/buf_internals.h"
#include "storage/bufmgr.h"
#ifdef PG_MODULE_MAGIC
PG_MODULE_MAGIC;
#endif
Datum invalidate_buffers(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(invalidate_buffers);
Datum
invalidate_buffers(PG_FUNCTION_ARGS)
{
RelFileNodeBackend rnodebackend;
rnodebackend.node.spcNode = PG_GETARG_OID(0);
rnodebackend.node.dbNode = PG_GETARG_OID(1);
rnodebackend.node.relNode = PG_GETARG_OID(2);
rnodebackend.backend = InvalidBackendId; /* not temporary/local */
DropRelFileNodeBuffers(rnodebackend, MAIN_FORKNUM, 0);
PG_RETURN_BOOL(true);
}