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Peter Eisentraut 675ddc4d70 Improve pgbench definition of yyscan_t 
It was defining yyscan_t as a macro while the rest of the code uses a
typedef with #ifdef guards around it.  The latter is also what the
flex generated code uses.  So it seems best to make it look like those
other places for consistency.

The old way also had a potential for conflict if some code included
multiple headers providing yyscan_t.  exprscan.l includes

    #include "fe_utils/psqlscan_int.h"
    #include "pgbench.h"

and fe_utils/psqlscan_int.h contains

    #ifndef YY_TYPEDEF_YY_SCANNER_T
    #define YY_TYPEDEF_YY_SCANNER_T
    typedef void *yyscan_t;
    #endif

which was then followed by pgbench.h

    #define yyscan_t  void *

and then the generated code in exprscan.c

    #ifndef YY_TYPEDEF_YY_SCANNER_T
    #define YY_TYPEDEF_YY_SCANNER_T
    typedef void* yyscan_t;
    #endif

This works, but if the #ifdef guard in psqlscan_int.h is removed, this
fails.

We want to move toward allowing repeat typedefs, per C11, but for that
we need to make sure they are all the same.

Reviewed-by: Chao Li <li.evan.chao@gmail.com>
Discussion: https://www.postgresql.org/message-id/flat/10d32190-f31b-40a5-b177-11db55597355@eisentraut.org
2025-09-12 08:15:41 +02:00
.github Add CODE_OF_CONDUCT.md, CONTRIBUTING.md, and SECURITY.md. 2024-07-02 13:03:58 -05:00
config Remove traces of support for Sun Studio compiler 2025-09-12 07:39:05 +02:00
contrib Remove whitespace in comment of pg_stat_statements.c 2025-09-12 09:56:10 +09:00
doc Default to log_lock_waits=on 2025-09-12 07:57:06 +02:00
src Improve pgbench definition of yyscan_t 2025-09-12 08:15:41 +02:00
.cirrus.star ci: Simplify ci-os-only handling 2025-08-14 12:09:34 -04:00
.cirrus.tasks.yml ci: Explicitly enable Meson features 2025-09-03 07:54:24 -07:00
.cirrus.yml ci: Per-repo configuration for manually trigger tasks 2025-08-14 11:54:03 -04:00
.dir-locals.el Make Emacs perl-mode indent more like perltidy. 2019-01-13 11:32:31 -08:00
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aclocal.m4 autoconf: Move export_dynamic determination to configure 2022-12-06 18:55:28 -08:00
configure Remove traces of support for Sun Studio compiler 2025-09-12 07:39:05 +02:00
configure.ac Remove traces of support for Sun Studio compiler 2025-09-12 07:39:05 +02:00
COPYRIGHT Align organization wording in copyright statement 2025-05-16 11:20:07 -04:00
GNUmakefile.in Allow selecting the git revision to be packaged by "make dist". 2024-05-03 11:08:50 -04:00
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Makefile Remove AIX support 2024-02-28 15:17:23 +04:00
meson.build Remove traces of support for Sun Studio compiler 2025-09-12 07:39:05 +02:00
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README.md Revise the style of a paragraph in README.md. 2024-03-21 10:16:41 -05:00

README.md

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.

Copyright and license information can be found in the file COPYRIGHT.

General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.

The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.