Fix -Wcast-qual warning

This dials back a couple of the qualifiers added by commit
7724cb9935a.  Specifically, in match_boolean_partition_clause() the
call to negate_clause() casts away the const, so we shouldn't make the
input argument const.

diff --git a/src/backend/partitioning/partprune.c b/src/backend/partitioning/partprune.c
index db1dd153ddb5c58fdceb9b82d09aa3fb3ae2c6f9..2901cd348a915cc274aead799c022cfb36efca61 100644 (file)
--- a/src/backend/partitioning/partprune.c
+++ b/src/backend/partitioning/partprune.c
@@ -158,7 +158,7 @@ static PartitionPruneStep *gen_prune_step_combine(GeneratePruningStepsContext *c
 static List *gen_prune_steps_from_opexps(GeneratePruningStepsContext *context,
                                                                                 List **keyclauses, Bitmapset *nullkeys);
 static PartClauseMatchStatus match_clause_to_partition_key(GeneratePruningStepsContext *context,
-                                                                                                                  const Expr *clause, const Expr *partkey, int partkeyidx,
+                                                                                                                  Expr *clause, const Expr *partkey, int partkeyidx,
                                                                                                                   bool *clause_is_not_null,
                                                                                                                   PartClauseInfo **pc, List **clause_steps);
 static List *get_steps_using_prefix(GeneratePruningStepsContext *context,
@@ -196,7 +196,7 @@ static PruneStepResult *perform_pruning_combine_step(PartitionPruneContext *cont
                                                                                                         PartitionPruneStepCombine *cstep,
                                                                                                         PruneStepResult **step_results);
 static PartClauseMatchStatus match_boolean_partition_clause(Oid partopfamily,
-                                                                                                                       const Expr *clause,
+                                                                                                                       Expr *clause,
                                                                                                                        const Expr *partkey,
                                                                                                                        Expr **outconst,
                                                                                                                        bool *notclause);
@@ -1816,7 +1816,7 @@ gen_prune_steps_from_opexps(GeneratePruningStepsContext *context,
  */
 static PartClauseMatchStatus
 match_clause_to_partition_key(GeneratePruningStepsContext *context,
-                                                         const Expr *clause, const Expr *partkey, int partkeyidx,
+                                                         Expr *clause, const Expr *partkey, int partkeyidx,
                                                          bool *clause_is_not_null, PartClauseInfo **pc,
                                                          List **clause_steps)
 {
@@ -3697,10 +3697,10 @@ perform_pruning_combine_step(PartitionPruneContext *context,
  * 'partkey'.
  */
 static PartClauseMatchStatus
-match_boolean_partition_clause(Oid partopfamily, const Expr *clause, const Expr *partkey,
+match_boolean_partition_clause(Oid partopfamily, Expr *clause, const Expr *partkey,
                                                           Expr **outconst, bool *notclause)
 {
-       const Expr *leftop;
+       Expr       *leftop;
 
        *outconst = NULL;
        *notclause = false;