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Up to now, the tab completion logic has only examined the last few words of the current input line; "last few" being originally as few as four words, but lately up to nine words. Furthermore, it only looked at what libreadline considers the current line of input, which made it rather myopic if you split your command across lines. This was tolerable, sort of, so long as the match patterns were only designed to consider the last few words of input; but with the recent addition of HeadMatches() and Matches() matching rules, we really have to do better if we want those to behave sanely. Hence, change the code to break the entire line down into words, and to include any previous lines in the command buffer along with the active readline input buffer. This will be a little bit slower than the previous coding, but some measurements say that even a query of several thousand characters can be parsed in a hundred or so microseconds on modern machines; so it's really not going to be significant for interactive tab completion. To reduce the cost some, I arranged to avoid the per-word malloc calls that used to occur: all the words are now kept in one malloc'd buffer. |
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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/.