diff options
Diffstat (limited to 'src/include/nodes/primnodes.h')
| -rw-r--r-- | src/include/nodes/primnodes.h | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h index 43f5766d732..4830efc5738 100644 --- a/src/include/nodes/primnodes.h +++ b/src/include/nodes/primnodes.h @@ -575,6 +575,8 @@ typedef struct WindowFunc List *args; /* FILTER expression, if any */ Expr *aggfilter; + /* List of WindowFuncRunConditions to help short-circuit execution */ + List *runCondition pg_node_attr(query_jumble_ignore); /* index of associated WindowClause */ Index winref; /* true if argument list was really '*' */ @@ -586,6 +588,34 @@ typedef struct WindowFunc } WindowFunc; /* + * WindowFuncRunCondition + * + * Represents intermediate OpExprs which will be used by WindowAgg to + * short-circuit execution. + */ +typedef struct WindowFuncRunCondition +{ + Expr xpr; + + /* PG_OPERATOR OID of the operator */ + Oid opno; + /* OID of collation that operator should use */ + Oid inputcollid pg_node_attr(query_jumble_ignore); + + /* + * true of WindowFunc belongs on the left of the resulting OpExpr or false + * if the WindowFunc is on the right. + */ + bool wfunc_left; + + /* + * The Expr being compared to the WindowFunc to use in the OpExpr in the + * WindowAgg's runCondition + */ + Expr *arg; +} WindowFuncRunCondition; + +/* * MergeSupportFunc * * A MergeSupportFunc is a merge support function expression that can only |