Rethink representation of PathTargets.

In commit 19a541143a09c067 I did not make PathTarget a subtype of Node,
and embedded a RelOptInfo's reltarget directly into it rather than having
a separately-allocated Node.  In hindsight that was misguided
micro-optimization, enabled by the fact that at that point we didn't have
any Paths with custom PathTargets.  Now that PathTarget processing has
been fleshed out some more, it's easier to see that it's better to have
PathTarget as an indepedent Node type, even if it does cost us one more
palloc to create a RelOptInfo.  So change it while we still can.

This commit just changes the representation, without doing anything more
interesting than that.

1 files changed, 5 insertions, 5 deletions

diff --git a/contrib/postgres_fdw/postgres_fdw.c b/contrib/postgres_fdw/postgres_fdw.c
index aa745f237e2..d4ee2a8548f 100644
--- a/contrib/postgres_fdw/postgres_fdw.c
+++ b/contrib/postgres_fdw/postgres_fdw.c
@@ -481,7 +481,7 @@ postgresGetForeignRelSize(PlannerInfo *root,
 	 * columns used in them.  Doesn't seem worth detecting that case though.)
 	 */
 	fpinfo->attrs_used = NULL;
-	pull_varattnos((Node *) baserel->reltarget.exprs, baserel->relid,
+	pull_varattnos((Node *) baserel->reltarget->exprs, baserel->relid,
 				   &fpinfo->attrs_used);
 	foreach(lc, fpinfo->local_conds)
 	{
@@ -532,7 +532,7 @@ postgresGetForeignRelSize(PlannerInfo *root,
 
 		/* Report estimated baserel size to planner. */
 		baserel->rows = fpinfo->rows;
-		baserel->reltarget.width = fpinfo->width;
+		baserel->reltarget->width = fpinfo->width;
 	}
 	else
 	{
@@ -549,7 +549,7 @@ postgresGetForeignRelSize(PlannerInfo *root,
 		{
 			baserel->pages = 10;
 			baserel->tuples =
-				(10 * BLCKSZ) / (baserel->reltarget.width +
+				(10 * BLCKSZ) / (baserel->reltarget->width +
 								 MAXALIGN(SizeofHeapTupleHeader));
 		}
 
@@ -2164,7 +2164,7 @@ estimate_path_cost_size(PlannerInfo *root,
 		 * between foreign relations.
 		 */
 		rows = foreignrel->rows;
-		width = foreignrel->reltarget.width;
+		width = foreignrel->reltarget->width;
 
 		/* Back into an estimate of the number of retrieved rows. */
 		retrieved_rows = clamp_row_est(rows / fpinfo->local_conds_sel);
@@ -3690,7 +3690,7 @@ postgresGetForeignJoinPaths(PlannerInfo *root,
 							&width, &startup_cost, &total_cost);
 	/* Now update this information in the joinrel */
 	joinrel->rows = rows;
-	joinrel->reltarget.width = width;
+	joinrel->reltarget->width = width;
 	fpinfo->rows = rows;
 	fpinfo->width = width;
 	fpinfo->startup_cost = startup_cost;