Remove unused function argument

The cache_plan argument to ri_PlanCheck has not been used since
e8c9fd5f.
Reviewed-by: vignesh C <vignesh21@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/ec8a8b45-a30b-9193-cd4b-985d60d1497e%402ndquadrant.com

src/backend/utils/adt/ri_triggers.c

@@ -209,8 +209,7 @@ static const RI_ConstraintInfo *ri_FetchConstraintInfo(Trigger *trigger,
 													   Relation trig_rel, bool rel_is_pk);
 static const RI_ConstraintInfo *ri_LoadConstraintInfo(Oid constraintOid);
 static SPIPlanPtr ri_PlanCheck(const char *querystr, int nargs, Oid *argtypes,
-							   RI_QueryKey *qkey, Relation fk_rel, Relation pk_rel,
-							   bool cache_plan);
+							   RI_QueryKey *qkey, Relation fk_rel, Relation pk_rel);
 static bool ri_PerformCheck(const RI_ConstraintInfo *riinfo,
 							RI_QueryKey *qkey, SPIPlanPtr qplan,
 							Relation fk_rel, Relation pk_rel,
@@ -385,7 +384,7 @@ RI_FKey_check(TriggerData *trigdata)
 
 		/* Prepare and save the plan */
 		qplan = ri_PlanCheck(querybuf.data, riinfo->nkeys, queryoids,
-							 &qkey, fk_rel, pk_rel, true);
+							 &qkey, fk_rel, pk_rel);
 	}
 
 	/*
@@ -512,7 +511,7 @@ ri_Check_Pk_Match(Relation pk_rel, Relation fk_rel,
 
 		/* Prepare and save the plan */
 		qplan = ri_PlanCheck(querybuf.data, riinfo->nkeys, queryoids,
-							 &qkey, fk_rel, pk_rel, true);
+							 &qkey, fk_rel, pk_rel);
 	}
 
 	/*
@@ -704,7 +703,7 @@ ri_restrict(TriggerData *trigdata, bool is_no_action)
 
 		/* Prepare and save the plan */
 		qplan = ri_PlanCheck(querybuf.data, riinfo->nkeys, queryoids,
-							 &qkey, fk_rel, pk_rel, true);
+							 &qkey, fk_rel, pk_rel);
 	}
 
 	/*
@@ -809,7 +808,7 @@ RI_FKey_cascade_del(PG_FUNCTION_ARGS)
 
 		/* Prepare and save the plan */
 		qplan = ri_PlanCheck(querybuf.data, riinfo->nkeys, queryoids,
-							 &qkey, fk_rel, pk_rel, true);
+							 &qkey, fk_rel, pk_rel);
 	}
 
 	/*
@@ -931,7 +930,7 @@ RI_FKey_cascade_upd(PG_FUNCTION_ARGS)
 
 		/* Prepare and save the plan */
 		qplan = ri_PlanCheck(querybuf.data, riinfo->nkeys * 2, queryoids,
-							 &qkey, fk_rel, pk_rel, true);
+							 &qkey, fk_rel, pk_rel);
 	}
 
 	/*
@@ -1110,7 +1109,7 @@ ri_set(TriggerData *trigdata, bool is_set_null)
 
 		/* Prepare and save the plan */
 		qplan = ri_PlanCheck(querybuf.data, riinfo->nkeys, queryoids,
-							 &qkey, fk_rel, pk_rel, true);
+							 &qkey, fk_rel, pk_rel);
 	}
 
 	/*
@@ -2128,8 +2127,7 @@ InvalidateConstraintCacheCallBack(Datum arg, int cacheid, uint32 hashvalue)
  */
 static SPIPlanPtr
 ri_PlanCheck(const char *querystr, int nargs, Oid *argtypes,
-			 RI_QueryKey *qkey, Relation fk_rel, Relation pk_rel,
-			 bool cache_plan)
+			 RI_QueryKey *qkey, Relation fk_rel, Relation pk_rel)
 {
 	SPIPlanPtr	qplan;
 	Relation	query_rel;
@@ -2160,12 +2158,9 @@ ri_PlanCheck(const char *querystr, int nargs, Oid *argtypes,
 	/* Restore UID and security context */
 	SetUserIdAndSecContext(save_userid, save_sec_context);
 
-	/* Save the plan if requested */
-	if (cache_plan)
-	{
-		SPI_keepplan(qplan);
-		ri_HashPreparedPlan(qkey, qplan);
-	}
+	/* Save the plan */
+	SPI_keepplan(qplan);
+	ri_HashPreparedPlan(qkey, qplan);
 
 	return qplan;
 }