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The realfail1 and realfail2 backup-prevention rules always returned token type FCONST, ignoring the possibility that what we've scanned is more appropriately described as ICONST. I think that at the time that code was added, it might actually have been safe to not distinguish; but since we started allowing AS-less aliases in SELECT target lists, it's definitely legal to have a number immediately followed by an identifier. In the SELECT case, it seems there's no visible consequence because make_const() will change the type back to integer anyway. But I'm worried that there are other contexts, or will be in future, where it's more important to get the constant's type right. Hence, use process_integer_literal to correctly determine which token type to return. Arguably this is a bug fix, but given the lack of evidence of user-visible problems, I'll refrain from back-patching. Discussion: https://postgr.es/m/21364.1542136808@sss.pgh.pa.us |
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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/.