Fix LATERAL references in GRAPH_TABLE with multi-label pattern When rewriting a GRAPH_TABLE into a subquery, replace_property_refs_mutator() bumps levelsup of lateral references by one so that they reference outside the subquery. This works for path patterns that result in only one path query. Patterns that produce multiple path queries are rewritten as a UNION of path queries. Since every path query becomes a subquery of the UNION statement, the levelsup of lateral references in those path queries need an additional bump. This adjustment was missing resulting in the lateral references being interpreted as references in the UNION query itself. This caused different symptoms like a crash in create_lateral_join_info() or error "plan should not reference subplan's variable". The symptoms varied depending on the number of RangeTblEntries in the UNION statement.
This commit adds the missing adjustment. Author: Ayush Tiwari <[email protected]> Author: Satya Narlapuram <[email protected]> Reviewed-by: Ashutosh Bapat <[email protected]> Discussion: https://www.postgresql.org/message-id/flat/CAHg%2BQDfnLzsgjaQ_CiKSpP4JH3MKOiwoawEcCzXa9uYr45yiWw%40mail.gmail.com Branch ------ master Details ------- https://git.postgresql.org/pg/commitdiff/4cb2a9863d89b320f37eb1bd76822f6f65e59311 Modified Files -------------- src/backend/rewrite/rewriteGraphTable.c | 7 +++++++ src/test/regress/expected/graph_table.out | 14 ++++++++++++++ src/test/regress/sql/graph_table.sql | 6 ++++++ 3 files changed, 27 insertions(+)
