diff options
Diffstat (limited to 'src/backend/optimizer/util/plancat.c')
| -rw-r--r-- | src/backend/optimizer/util/plancat.c | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/src/backend/optimizer/util/plancat.c b/src/backend/optimizer/util/plancat.c index 51470dd73e1..25545029d7a 100644 --- a/src/backend/optimizer/util/plancat.c +++ b/src/backend/optimizer/util/plancat.c @@ -2250,9 +2250,8 @@ find_partition_scheme(PlannerInfo *root, Relation relation) /* * set_baserel_partition_key_exprs * - * Builds partition key expressions for the given base relation and sets them - * in given RelOptInfo. Any single column partition keys are converted to Var - * nodes. All Var nodes are restamped with the relid of given relation. + * Builds partition key expressions for the given base relation and fills + * rel->partexprs. */ static void set_baserel_partition_key_exprs(Relation relation, @@ -2300,16 +2299,17 @@ set_baserel_partition_key_exprs(Relation relation, lc = lnext(partkey->partexprs, lc); } + /* Base relations have a single expression per key. */ partexprs[cnt] = list_make1(partexpr); } rel->partexprs = partexprs; /* - * A base relation can not have nullable partition key expressions. We - * still allocate array of empty expressions lists to keep partition key - * expression handling code simple. See build_joinrel_partition_info() and - * match_expr_to_partition_keys(). + * A base relation does not have nullable partition key expressions, since + * no outer join is involved. We still allocate an array of empty + * expression lists to keep partition key expression handling code simple. + * See build_joinrel_partition_info() and match_expr_to_partition_keys(). */ rel->nullable_partexprs = (List **) palloc0(sizeof(List *) * partnatts); } |