| /*------------------------------------------------------------------------- |
| * |
| * cdbsubselect.c |
| * Flattens subqueries, transforms them to joins. |
| * |
| * Portions Copyright (c) 2007-2008, Greenplum inc |
| * Portions Copyright (c) 2012-Present VMware, Inc. or its affiliates. |
| * |
| * |
| * IDENTIFICATION |
| * src/include/cdb/cdbsubselect.h |
| * |
| *------------------------------------------------------------------------- |
| */ |
| #ifndef CDBSUBSELECT_H |
| #define CDBSUBSELECT_H |
| |
| struct Node; /* #include "nodes/nodes.h" */ |
| struct PlannerInfo; /* #include "nodes/relation.h" */ |
| |
| extern JoinExpr *convert_EXPR_to_join(PlannerInfo *root, OpExpr *opexp); |
| extern bool has_correlation_in_funcexpr_rte(List *rtable); |
| extern bool is_simple_subquery(PlannerInfo *root, Query *subquery, RangeTblEntry *rte, |
| JoinExpr *lowest_outer_join); |
| extern JoinExpr *convert_IN_to_antijoin(PlannerInfo *root, SubLink *sublink, Relids available_rels); |
| |
| extern void cdbsubselect_drop_orderby(Query *subselect); |
| extern void cdbsubselect_drop_distinct(Query *subselect); |
| |
| #endif /* CDBSUBSELECT_H */ |
