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904f6a593a
There are several pieces of catalog information that need to be retrieved for a relation during the early stage of planning. These include relhassubclass, which is used to clear the inh flag if the relation has no children, as well as a column's attgenerated and default value, which are needed to expand virtual generated columns. More such information may be required in the future. Currently, these pieces of catalog data are collected in multiple places, resulting in repeated table_open/table_close calls for each relation in the rangetable. This patch centralizes the collection of all required early-stage catalog information into a single loop over the rangetable, allowing each relation to be opened and closed only once. Author: Richard Guo <guofenglinux@gmail.com> Reviewed-by: Robert Haas <robertmhaas@gmail.com> Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us> Discussion: https://postgr.es/m/CAMbWs4-bFJ1At4btk5wqbezdu8PLtQ3zv-aiaY3ry9Ymm=jgFQ@mail.gmail.com
59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/*-------------------------------------------------------------------------
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*
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* prep.h
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* prototypes for files in optimizer/prep/
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*
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*
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* Portions Copyright (c) 1996-2025, 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/prep.h
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*
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*-------------------------------------------------------------------------
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*/
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#ifndef PREP_H
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#define PREP_H
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#include "nodes/pathnodes.h"
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#include "nodes/plannodes.h"
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/*
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* prototypes for prepjointree.c
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*/
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extern void transform_MERGE_to_join(Query *parse);
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extern Query *preprocess_relation_rtes(PlannerInfo *root);
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extern void replace_empty_jointree(Query *parse);
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extern void pull_up_sublinks(PlannerInfo *root);
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extern void preprocess_function_rtes(PlannerInfo *root);
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extern void pull_up_subqueries(PlannerInfo *root);
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extern void flatten_simple_union_all(PlannerInfo *root);
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extern void reduce_outer_joins(PlannerInfo *root);
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extern void remove_useless_result_rtes(PlannerInfo *root);
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extern Relids get_relids_in_jointree(Node *jtnode, bool include_outer_joins,
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bool include_inner_joins);
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extern Relids get_relids_for_join(Query *query, int joinrelid);
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/*
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* prototypes for preptlist.c
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*/
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extern void preprocess_targetlist(PlannerInfo *root);
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extern List *extract_update_targetlist_colnos(List *tlist);
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extern PlanRowMark *get_plan_rowmark(List *rowmarks, Index rtindex);
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/*
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* prototypes for prepagg.c
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*/
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extern void get_agg_clause_costs(PlannerInfo *root, AggSplit aggsplit,
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AggClauseCosts *costs);
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extern void preprocess_aggrefs(PlannerInfo *root, Node *clause);
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/*
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* prototypes for prepunion.c
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*/
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extern RelOptInfo *plan_set_operations(PlannerInfo *root);
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#endif /* PREP_H */
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