db1071d4ee
A test patch to pass parse and plan trees through outfuncs + readfuncs exposed several issues that need to be fixed to get clean matches: Query.withCheckOptions failed to get copied; it's intentionally ignored by outfuncs/readfuncs on the grounds that it'd always be NIL anyway in stored rules. This seems less than future-proof, and it's not even saving very much, so just undo the decision and treat the field like all others. Several places that convert a view RTE into a subquery RTE, or similar manipulations, failed to clear out fields that were specific to the original RTE type and should be zero in a subquery RTE. Since readfuncs.c will leave such fields as zero, equalfuncs.c thinks the nodes are different leading to a reported mismatch. It seems like a good idea to clear out the no-longer-needed fields, even though in principle nothing should look at them; the node ought to be indistinguishable from how it would look if we'd built a new node instead of scribbling on the old one. BuildOnConflictExcludedTargetlist randomly set the resname of some TargetEntries to "" not NULL. outfuncs/readfuncs don't distinguish those cases, and so the string will read back in as NULL ... but equalfuncs.c does distinguish. Perhaps we ought to try to make things more consistent in this area --- but it's just useless extra code space for BuildOnConflictExcludedTargetlist to not use NULL here, so I fixed it for now by making it do that. catversion bumped because the change in handling of Query.withCheckOptions affects stored rules. Discussion: https://postgr.es/m/17114.1537138992@sss.pgh.pa.us |
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README
PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.