[LucaCappelletti94]

SELECT t.*::t AS t FROM t fails under PostgreSqlDialect with Expected: end of statement, found: ::, and so do UPDATE t SET a = 1 RETURNING t.*::t and SELECT f(t.*::t) FROM t. PostgreSQL accepts all three, and pg_get_functiondef, pg_get_viewdef and pg_dump print a whole-row reference at the top of a target list in exactly this form, because the cast stops t.* from being expanded into its columns (ruleutils.c, get_variable).

Parser::parse_wildcard_expr returned the qualified wildcard as soon as it read t.*, before looking at what follows. When :: comes next it now parses the item as an expression, where t.* is already an operand under PostgreSQL (WHERE t.* IS NOT NULL parses today), so the item becomes a Cast of Expr::QualifiedWildcard. A plain t.* keeps its wildcard select item.

Very small change, very long explaination.

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 83.11%. Comparing base (1071d75) to head (6ec6246).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2780      +/-   ##
==========================================
+ Coverage   83.09%   83.11%   +0.02%     
==========================================
  Files          42       42              
  Lines       36261    36262       +1     
  Branches    36261    36262       +1     
==========================================
+ Hits        30130    30139       +9     
+ Misses       2636     2631       -5     
+ Partials     3495     3492       -3     

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