Fix commit c11cb17d.

I neglected to update copyfuncs/outfuncs/readfuncs.

Discussion: https://postgr.es/m/12491.1582833409%40sss.pgh.pa.us

src/backend/nodes/copyfuncs.c

@@ -988,6 +988,7 @@ _copyAgg(const Agg *from)
 		COPY_POINTER_FIELD(grpCollations, from->numCols * sizeof(Oid));
 	}
 	COPY_SCALAR_FIELD(numGroups);
+	COPY_SCALAR_FIELD(transitionSpace);
 	COPY_BITMAPSET_FIELD(aggParams);
 	COPY_NODE_FIELD(groupingSets);
 	COPY_NODE_FIELD(chain);

src/backend/nodes/outfuncs.c

@@ -783,6 +783,7 @@ _outAgg(StringInfo str, const Agg *node)
 	WRITE_OID_ARRAY(grpOperators, node->numCols);
 	WRITE_OID_ARRAY(grpCollations, node->numCols);
 	WRITE_LONG_FIELD(numGroups);
+	WRITE_UINT64_FIELD(transitionSpace);
 	WRITE_BITMAPSET_FIELD(aggParams);
 	WRITE_NODE_FIELD(groupingSets);
 	WRITE_NODE_FIELD(chain);
@@ -1976,6 +1977,7 @@ _outAggPath(StringInfo str, const AggPath *node)
 	WRITE_ENUM_FIELD(aggstrategy, AggStrategy);
 	WRITE_ENUM_FIELD(aggsplit, AggSplit);
 	WRITE_FLOAT_FIELD(numGroups, "%.0f");
+	WRITE_UINT64_FIELD(transitionSpace);
 	WRITE_NODE_FIELD(groupClause);
 	WRITE_NODE_FIELD(qual);
 }
@@ -2013,6 +2015,7 @@ _outGroupingSetsPath(StringInfo str, const GroupingSetsPath *node)
 	WRITE_ENUM_FIELD(aggstrategy, AggStrategy);
 	WRITE_NODE_FIELD(rollups);
 	WRITE_NODE_FIELD(qual);
+	WRITE_UINT64_FIELD(transitionSpace);
 }
 
 static void

src/backend/nodes/readfuncs.c

@@ -2203,6 +2203,7 @@ _readAgg(void)
 	READ_OID_ARRAY(grpOperators, local_node->numCols);
 	READ_OID_ARRAY(grpCollations, local_node->numCols);
 	READ_LONG_FIELD(numGroups);
+	READ_UINT64_FIELD(transitionSpace);
 	READ_BITMAPSET_FIELD(aggParams);
 	READ_NODE_FIELD(groupingSets);
 	READ_NODE_FIELD(chain);

src/include/nodes/pathnodes.h

@@ -1663,7 +1663,7 @@ typedef struct AggPath
 	AggStrategy aggstrategy;	/* basic strategy, see nodes.h */
 	AggSplit	aggsplit;		/* agg-splitting mode, see nodes.h */
 	double		numGroups;		/* estimated number of groups in input */
-	Size		transitionSpace;	/* for pass-by-ref transition data */
+	uint64		transitionSpace;	/* for pass-by-ref transition data */
 	List	   *groupClause;	/* a list of SortGroupClause's */
 	List	   *qual;			/* quals (HAVING quals), if any */
 } AggPath;
@@ -1701,7 +1701,7 @@ typedef struct GroupingSetsPath
 	AggStrategy aggstrategy;	/* basic strategy */
 	List	   *rollups;		/* list of RollupData */
 	List	   *qual;			/* quals (HAVING quals), if any */
-	Size		transitionSpace;	/* for pass-by-ref transition data */
+	uint64		transitionSpace;	/* for pass-by-ref transition data */
 } GroupingSetsPath;
 
 /*

src/include/nodes/plannodes.h

@@ -813,7 +813,7 @@ typedef struct Agg
 	Oid		   *grpOperators;	/* equality operators to compare with */
 	Oid		   *grpCollations;
 	long		numGroups;		/* estimated number of groups in input */
-	Size		transitionSpace;	/* for pass-by-ref transition data */
+	uint64		transitionSpace;	/* for pass-by-ref transition data */
 	Bitmapset  *aggParams;		/* IDs of Params used in Aggref inputs */
 	/* Note: planner provides numGroups & aggParams only in HASHED/MIXED case */
 	List	   *groupingSets;	/* grouping sets to use */