68ab8e8ba4
To allow multiline SQL commands in scripts, adopt the same rules psql uses to decide what is the end of a SQL command, to wit, an unquoted semicolon not encased in parentheses. Do this by importing the same flex lexer that psql uses, since coping with stuff like dollar-quoted literals is hard to get right without going the full nine yards. This makes use of the infrastructure added in commit 0ea9efbe9ec1bf07 to support independently-written flex lexers scanning the same PsqlScanState input-buffer data structure. Since that infrastructure isn't very friendly to ad-hoc parsing code such as strtok(), improve exprscan.l so that it can parse either whitespace-separated words or expression tokens, on demand, and rewrite pgbench.c's backslash-command parsing code to always use the lexer to fetch tokens. It's still the case that pgbench backslash commands extend to the end of the line, no more and no less. That could be changed in a fairly localized way now, and there was some interest in doing so, but it seems like material for a separate patch. In passing, make some marginal cleanups in syntax error reporting, const-ify a few data structures that could use it, and run some of this code through pgindent. I can't tell whether the MSVC build scripts need to be taught explicitly about the changes here or not, but the buildfarm will soon tell us. Kyotaro Horiguchi and Tom Lane
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/.