diff options
Diffstat (limited to 'src/backend/optimizer/plan/analyzejoins.c')
| -rw-r--r-- | src/backend/optimizer/plan/analyzejoins.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/src/backend/optimizer/plan/analyzejoins.c b/src/backend/optimizer/plan/analyzejoins.c index 6a3c030e8ef..e592e1ac3d1 100644 --- a/src/backend/optimizer/plan/analyzejoins.c +++ b/src/backend/optimizer/plan/analyzejoins.c @@ -1683,14 +1683,14 @@ add_non_redundant_clauses(PlannerInfo *root, } /* - * A custom callback for ChangeVarNodesExtended() providing - * Self-join elimination (SJE) related functionality + * A custom callback for ChangeVarNodesExtended() providing Self-join + * elimination (SJE) related functionality * - * SJE needs to skip the RangeTblRef node - * type. During SJE's last step, remove_rel_from_joinlist() removes - * remaining RangeTblRefs with target relid. If ChangeVarNodes() replaces - * the target relid before, remove_rel_from_joinlist() fails to identify - * the nodes to delete. + * SJE needs to skip the RangeTblRef node type. During SJE's last + * step, remove_rel_from_joinlist() removes remaining RangeTblRefs + * with target relid. If ChangeVarNodes() replaces the target relid + * before, remove_rel_from_joinlist() would fail to identify the nodes + * to delete. * * SJE also needs to change the relids within RestrictInfo's. */ @@ -1769,8 +1769,8 @@ replace_relid_callback(Node *node, ChangeVarNodes_context *context) /* * For self-join elimination, changing varnos could transform * "t1.a = t2.a" into "t1.a = t1.a". That is always true as long - * as "t1.a" is not null. We use qual() to check for such a case, - * and then we replace the qual for a check for not null + * as "t1.a" is not null. We use equal() to check for such a + * case, and then we replace the qual with a check for not null * (NullTest). */ if (leftOp != NULL && equal(leftOp, rightOp)) |