pgstrom_init_gpujoin(void)

/*
 *
 * Entrypoint of GpuJoin
 */
void
pgstrom_init_gpujoin(void)
{
	/* turn on/off gpunestloop */
	DefineCustomBoolVariable("pg_strom.enable_gpunestloop",
							 "Enables the use of GpuNestLoop logic",
							 NULL,
							 &enable_gpunestloop,
							 true,
							 PGC_USERSET,
							 GUC_NOT_IN_SAMPLE,
							 NULL, NULL, NULL);
	/* turn on/off gpuhashjoin */
	DefineCustomBoolVariable("pg_strom.enable_gpuhashjoin",
							 "Enables the use of GpuHashJoin logic",
							 NULL,
							 &enable_gpuhashjoin,
							 true,
							 PGC_USERSET,
							 GUC_NOT_IN_SAMPLE,
							 NULL, NULL, NULL);
#if PG_VERSION_NUM >= 110000
	/* turn on/off partition wise gpujoin */
	DefineCustomBoolVariable("pg_strom.enable_partitionwise_gpujoin",
							 "(EXPERIMENTAL) Enables partition wise GpuJoin",
							 NULL,
							 &enable_partitionwise_gpujoin,
							 true,
							 PGC_USERSET,
                             GUC_NOT_IN_SAMPLE,
                             NULL, NULL, NULL);
#else
	enable_partitionwise_gpujoin = false;
#endif
	/* setup path methods */
	gpujoin_path_methods.CustomName				= "GpuJoin";
	gpujoin_path_methods.PlanCustomPath			= PlanGpuJoinPath;

	/* setup plan methods */
	gpujoin_plan_methods.CustomName				= "GpuJoin";
	gpujoin_plan_methods.CreateCustomScanState	= gpujoin_create_scan_state;
	RegisterCustomScanMethods(&gpujoin_plan_methods);

	/* setup exec methods */
	gpujoin_exec_methods.CustomName				= "GpuJoin";
	gpujoin_exec_methods.BeginCustomScan		= ExecInitGpuJoin;
	gpujoin_exec_methods.ExecCustomScan			= ExecGpuJoin;
	gpujoin_exec_methods.EndCustomScan			= ExecEndGpuJoin;
	gpujoin_exec_methods.ReScanCustomScan		= ExecReScanGpuJoin;
	gpujoin_exec_methods.MarkPosCustomScan		= NULL;
	gpujoin_exec_methods.RestrPosCustomScan		= NULL;
	gpujoin_exec_methods.EstimateDSMCustomScan  = ExecGpuJoinEstimateDSM;
	gpujoin_exec_methods.InitializeDSMCustomScan = ExecGpuJoinInitDSM;
	gpujoin_exec_methods.InitializeWorkerCustomScan = ExecGpuJoinInitWorker;
	gpujoin_exec_methods.ReInitializeDSMCustomScan = ExecGpuJoinReInitializeDSM;
	gpujoin_exec_methods.ShutdownCustomScan		= ExecShutdownGpuJoin;
	gpujoin_exec_methods.ExplainCustomScan		= ExplainGpuJoin;

	/* hook registration */
	set_join_pathlist_next = set_join_pathlist_hook;
	set_join_pathlist_hook = gpujoin_add_join_path;
}