diff options
Diffstat (limited to 'src/include/nodes/primnodes.h')
| -rw-r--r-- | src/include/nodes/primnodes.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h index d4ce0370884..f66e1449d86 100644 --- a/src/include/nodes/primnodes.h +++ b/src/include/nodes/primnodes.h @@ -1499,6 +1499,11 @@ typedef struct RangeTblRef * alias has a critical impact on semantics, because a join with an alias * restricts visibility of the tables/columns inside it. * + * join_using_alias is an Alias node representing the join correlation + * name that SQL:2016 and later allow to be attached to JOIN/USING. + * Its column alias list includes only the common column names from USING, + * and it does not restrict visibility of the join's input tables. + * * During parse analysis, an RTE is created for the Join, and its index * is filled into rtindex. This RTE is present mainly so that Vars can * be created that refer to the outputs of the join. The planner sometimes @@ -1514,6 +1519,7 @@ typedef struct JoinExpr Node *larg; /* left subtree */ Node *rarg; /* right subtree */ List *usingClause; /* USING clause, if any (list of String) */ + Alias *join_using_alias; /* alias attached to USING clause, if any */ Node *quals; /* qualifiers on join, if any */ Alias *alias; /* user-written alias clause, if any */ int rtindex; /* RT index assigned for join, or 0 */ |