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27199058d9
Change psqlscan.l to specify '%option reentrant', adjust internal APIs to match, and get rid of its internal static variables. While this is good cleanup in an abstract sense, the reason to do it right now is that it seems the only practical way to support use of separate flex lexers with common PsqlScanState infrastructure. If we build two non-reentrant lexers then we are going to have problems with dangling buffer pointers in whichever lexer isn't active when we transition from one buffer to another, as well as curious side-effects if we try to share any code between the files. (Horiguchi-san had a different solution to that in his pending patch, but I find it ugly and probably broken for corner cases.) Depending on which version of flex you're using, this may result in getting a "warning: unused variable 'yyg'" warning from psqlscan, similar to the one you'd have seen for a long time in backend/parser/scan.l. I put a local -Wno-error into CFLAGS for the file, for the convenience of those who compile with -Werror. Also, stop compiling psqlscan as part of mainloop.c, and make it a standalone build target instead. This is a lot cleaner than before, though it doesn't really change much in practice as of this commit. (I'm not sure whether the MSVC build scripts will need some help with this part, but the buildfarm will soon tell 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: http://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 http://www.postgresql.org/download/. For more information look at our web site located at http://www.postgresql.org/.