diff options
Diffstat (limited to 'src/include/nodes/execnodes.h')
| -rw-r--r-- | src/include/nodes/execnodes.h | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/include/nodes/execnodes.h b/src/include/nodes/execnodes.h index 59b17f3c993..ac75f86fef7 100644 --- a/src/include/nodes/execnodes.h +++ b/src/include/nodes/execnodes.h @@ -414,17 +414,20 @@ typedef struct EState * ExecRowMark - * runtime representation of FOR [KEY] UPDATE/SHARE clauses * - * When doing UPDATE, DELETE, or SELECT FOR [KEY] UPDATE/SHARE, we should have an + * When doing UPDATE, DELETE, or SELECT FOR [KEY] UPDATE/SHARE, we will have an * ExecRowMark for each non-target relation in the query (except inheritance - * parent RTEs, which can be ignored at runtime). See PlanRowMark for details - * about most of the fields. In addition to fields directly derived from - * PlanRowMark, we store curCtid, which is used by the WHERE CURRENT OF code. + * parent RTEs, which can be ignored at runtime). Virtual relations such as + * subqueries-in-FROM will have an ExecRowMark with relation == NULL. See + * PlanRowMark for details about most of the fields. In addition to fields + * directly derived from PlanRowMark, we store curCtid, which is used by the + * WHERE CURRENT OF code. * * EState->es_rowMarks is a list of these structs. */ typedef struct ExecRowMark { Relation relation; /* opened and suitably locked relation */ + Oid relid; /* its OID (or InvalidOid, if subquery) */ Index rti; /* its range table index */ Index prti; /* parent range table index, if child */ Index rowmarkId; /* unique identifier for resjunk columns */ |