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Make generate_queries_for_path_pattern_recurse() interruptible

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In case of a very long path pattern with each element pattern being
resolved to many graph elements
generate_queries_for_path_pattern_recurse() may take very long time to
generate all the possible graph paths.  Make
generate_queries_for_path_pattern_recurse() interruptible so that a
user may be able to cancel such a query if required and the interrupts
are processed in timely manner.

Author: Satyanarayana Narlapuram <satyanarlapuram@gmail.com>
Reviewed-by: Ashutosh Bapat <ashutosh.bapat.oss@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/CAHg%2BQDfDwcM4%3DDSiAV6Ly89YQ5EcMhzO1-9x%3DmGG1WJzODcAig%40mail.gmail.com
This commit is contained in:
Peter Eisentraut
2026-08-14 14:53:50 +02:00
parent 9924e2d900
commit a82e33a83d
1 changed files with 2 additions and 0 deletions
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src/backend/rewrite/rewriteGraphTable.c
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@@ -367,6 +367,8 @@ generate_queries_for_path_pattern_recurse(RangeTblEntry *rte, List *pathqueries,
foreach_ptr(struct path_element, pe, path_elems)
{
CHECK_FOR_INTERRUPTS();
/* Update current path being built with current element. */
cur_path = lappend(cur_path, pe);