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830d756590
Allowing sub-select containing LIMIT/OFFSET in workers can lead to inconsistent results at the top-level as there is no guarantee that the row order will be fully deterministic. The fix is to prohibit pushing LIMIT/OFFSET within sub-selects to workers. Reported-by: Andrew Fletcher Bug: 15324 Author: Amit Kapila Reviewed-by: Dilip Kumar Backpatch-through: 9.6 Discussion: https://postgr.es/m/153417684333.10284.11356259990921828616@wrigleys.postgresql.org
64 lines
2 KiB
C
64 lines
2 KiB
C
/*-------------------------------------------------------------------------
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*
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* planner.h
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* prototypes for planner.c.
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*
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*
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* Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
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* Portions Copyright (c) 1994, Regents of the University of California
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*
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* src/include/optimizer/planner.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PLANNER_H
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#define PLANNER_H
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#include "nodes/plannodes.h"
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#include "nodes/relation.h"
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/* Hook for plugins to get control in planner() */
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typedef PlannedStmt *(*planner_hook_type) (Query *parse,
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int cursorOptions,
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ParamListInfo boundParams);
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extern PGDLLIMPORT planner_hook_type planner_hook;
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/* Hook for plugins to get control when grouping_planner() plans upper rels */
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typedef void (*create_upper_paths_hook_type) (PlannerInfo *root,
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UpperRelationKind stage,
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RelOptInfo *input_rel,
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RelOptInfo *output_rel,
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void *extra);
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extern PGDLLIMPORT create_upper_paths_hook_type create_upper_paths_hook;
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extern PlannedStmt *planner(Query *parse, int cursorOptions,
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ParamListInfo boundParams);
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extern PlannedStmt *standard_planner(Query *parse, int cursorOptions,
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ParamListInfo boundParams);
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extern PlannerInfo *subquery_planner(PlannerGlobal *glob, Query *parse,
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PlannerInfo *parent_root,
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bool hasRecursion, double tuple_fraction);
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extern bool is_dummy_plan(Plan *plan);
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extern RowMarkType select_rowmark_type(RangeTblEntry *rte,
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LockClauseStrength strength);
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extern bool limit_needed(Query *parse);
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extern void mark_partial_aggref(Aggref *agg, AggSplit aggsplit);
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extern Path *get_cheapest_fractional_path(RelOptInfo *rel,
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double tuple_fraction);
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extern Expr *expression_planner(Expr *expr);
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extern Expr *preprocess_phv_expression(PlannerInfo *root, Expr *expr);
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extern bool plan_cluster_use_sort(Oid tableOid, Oid indexOid);
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extern int plan_create_index_workers(Oid tableOid, Oid indexOid);
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#endif /* PLANNER_H */
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