rewriteGraphTable.h File Reference

#include "nodes/parsenodes.h"

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Functions
Query *	rewriteGraphTable (Query *parsetree, int rt_index)

Function Documentation

rewriteGraphTable()

Query * rewriteGraphTable ( Query *  parsetree, int  rt_index  )

extern

Definition at line 110 of file rewriteGraphTable.c.

{
    RangeTblEntry *rte;
    Query      *graph_table_query;
    List       *path_pattern;
    List       *pathqueries = NIL;
 
    rte = rt_fetch(rt_index, parsetree->rtable);
 
    Assert(list_length(rte->graph_pattern->path_pattern_list) == 1);
 
    path_pattern = linitial(rte->graph_pattern->path_pattern_list);
    pathqueries = generate_queries_for_path_pattern(rte, path_pattern);
    graph_table_query = generate_union_from_pathqueries(&pathqueries);
 
    AcquireRewriteLocks(graph_table_query, true, false);
 
    rte->rtekind = RTE_SUBQUERY;
    rte->subquery = graph_table_query;
    rte->lateral = true;
 
    /*
     * Reset no longer applicable fields, to appease
     * WRITE_READ_PARSE_PLAN_TREES.
     */
    rte->graph_pattern = NULL;
    rte->graph_table_columns = NIL;
 
    return parsetree;
}

References AcquireRewriteLocks(), Assert, fb(), generate_queries_for_path_pattern(), generate_union_from_pathqueries(), linitial, list_length(), NIL, rt_fetch, Query::rtable, and RTE_SUBQUERY.

Referenced by fireRIRrules().