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Previously you could only use unqualified variable names here. While that's not a functional deficiency, since only the target table can be referenced, it's a surprising inconsistency with the rules for partial-index predicates, on which this syntax is supposedly modeled. The fix for that is no harder than passing addToRelNameSpace = true to addNSItemToQuery. However, it's really pretty bogus for transformOnConflictArbiter and transformOnConflictClause to be messing with the namespace item for the target table at all. It's not theirs to manage, it results in duplicative creations of namespace items, and transformOnConflictClause wasn't even doing it quite correctly (that coding resulted in two nsitems for the target table, since it hadn't cleaned out the existing one). Hence, make transformInsertStmt responsible for setting up the target nsitem once for both these clauses and RETURNING. Also, arrange for ON CONFLICT ... UPDATE's "excluded" pseudo-relation to be added to the rangetable before we run transformOnConflictArbiter. This produces a more helpful HINT if someone writes "excluded.col" in the arbiter expression. Per bug #16958 from Lukas Eder. Although I agree this is a bug, the consequences are hardly severe, so no back-patch. Discussion: https://postgr.es/m/16958-963f638020de271c@postgresql.org |
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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/.