From 323eaf98250e2de9afb2d9f86fa841beaeb575b7 Mon Sep 17 00:00:00 2001
From: Peter Eisentraut <peter_e@gmx.net>
Date: Thu, 13 Dec 2018 21:17:53 +0100
Subject: [PATCH] Add some const decorations

These mainly help understanding the function signatures better.
---
 src/backend/executor/execExpr.c     |  4 ++--
 src/backend/executor/execGrouping.c |  8 ++++----
 src/include/executor/executor.h     | 12 ++++++------
 3 files changed, 12 insertions(+), 12 deletions(-)

diff --git a/src/backend/executor/execExpr.c b/src/backend/executor/execExpr.c
index d9087cac15..4f8a2a5bc2 100644
--- a/src/backend/executor/execExpr.c
+++ b/src/backend/executor/execExpr.c
@@ -3314,8 +3314,8 @@ ExprState *
 ExecBuildGroupingEqual(TupleDesc ldesc, TupleDesc rdesc,
 					   const TupleTableSlotOps *lops, const TupleTableSlotOps *rops,
 					   int numCols,
-					   AttrNumber *keyColIdx,
-					   Oid *eqfunctions,
+					   const AttrNumber *keyColIdx,
+					   const Oid *eqfunctions,
 					   PlanState *parent)
 {
 	ExprState  *state = makeNode(ExprState);
diff --git a/src/backend/executor/execGrouping.c b/src/backend/executor/execGrouping.c
index abce1e95cb..efe8c30383 100644
--- a/src/backend/executor/execGrouping.c
+++ b/src/backend/executor/execGrouping.c
@@ -59,8 +59,8 @@ static int	TupleHashTableMatch(struct tuplehash_hash *tb, const MinimalTuple tup
 ExprState *
 execTuplesMatchPrepare(TupleDesc desc,
 					   int numCols,
-					   AttrNumber *keyColIdx,
-					   Oid *eqOperators,
+					   const AttrNumber *keyColIdx,
+					   const Oid *eqOperators,
 					   PlanState *parent)
 {
 	Oid		   *eqFunctions = (Oid *) palloc(numCols * sizeof(Oid));
@@ -94,7 +94,7 @@ execTuplesMatchPrepare(TupleDesc desc,
  */
 void
 execTuplesHashPrepare(int numCols,
-					  Oid *eqOperators,
+					  const Oid *eqOperators,
 					  Oid **eqFuncOids,
 					  FmgrInfo **hashFunctions)
 {
@@ -153,7 +153,7 @@ TupleHashTable
 BuildTupleHashTable(PlanState *parent,
 					TupleDesc inputDesc,
 					int numCols, AttrNumber *keyColIdx,
-					Oid *eqfuncoids,
+					const Oid *eqfuncoids,
 					FmgrInfo *hashfunctions,
 					long nbuckets, Size additionalsize,
 					MemoryContext tablecxt, MemoryContext tempcxt,
diff --git a/src/include/executor/executor.h b/src/include/executor/executor.h
index 2feec628c0..92a10ebd5c 100644
--- a/src/include/executor/executor.h
+++ b/src/include/executor/executor.h
@@ -108,17 +108,17 @@ extern bool execCurrentOf(CurrentOfExpr *cexpr,
  */
 extern ExprState *execTuplesMatchPrepare(TupleDesc desc,
 					   int numCols,
-					   AttrNumber *keyColIdx,
-					   Oid *eqOperators,
+					   const AttrNumber *keyColIdx,
+					   const Oid *eqOperators,
 					   PlanState *parent);
 extern void execTuplesHashPrepare(int numCols,
-					  Oid *eqOperators,
+					  const Oid *eqOperators,
 					  Oid **eqFuncOids,
 					  FmgrInfo **hashFunctions);
 extern TupleHashTable BuildTupleHashTable(PlanState *parent,
 					TupleDesc inputDesc,
 					int numCols, AttrNumber *keyColIdx,
-					Oid *eqfuncoids,
+					const Oid *eqfuncoids,
 					FmgrInfo *hashfunctions,
 					long nbuckets, Size additionalsize,
 					MemoryContext tablecxt,
@@ -244,8 +244,8 @@ extern ExprState *ExecBuildAggTrans(AggState *aggstate, struct AggStatePerPhaseD
 extern ExprState *ExecBuildGroupingEqual(TupleDesc ldesc, TupleDesc rdesc,
 					   const TupleTableSlotOps *lops, const TupleTableSlotOps *rops,
 					   int numCols,
-					   AttrNumber *keyColIdx,
-					   Oid *eqfunctions,
+					   const AttrNumber *keyColIdx,
+					   const Oid *eqfunctions,
 					   PlanState *parent);
 extern ProjectionInfo *ExecBuildProjectionInfo(List *targetList,
 						ExprContext *econtext,