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NAME

ftimes-dbm-make - Create or update a Berkeley database


SYNOPSIS

ftimes-dbm-make [-F separator] [-o option[,option[,...]]] -d db file [file ...]


DESCRIPTION

This utility reads one or more input files (see ftimes-dbm-reap(1)) and creates or updates the specified database. Databases are implemented as BTrees and constructed using Perl's DB_File module. Enumerating these databases yields the following format:

    key|value

The primary rule of engagement is that imported key/value pairs trump existing pairs in the database. This is true unless the pairs are identical. In that case the existing pairs are not modified. If the AlwaysInsert option is set, imported pairs always trump existing pairs. Input files are processed in command-line order. Typically, files that are sorted yield much faster load times.


OPTIONS

-d db

Specifies the name of the database to create or update.

-F separator

Specifies the input field separator. Valid separators include the following characters: tab '\t', space ' ', comma ',', colon ':', semi-colon ';', equal sign '=', and pipe '|'. The default separator is a pipe. Note that parse errors are likely to occur if the specified separator appears in any of the field values.

-o option,[option[,...]]

Specifies the list of options to apply. Currently the following options are supported:

AlwaysInsert

If a key already exists, its value is overwritten. This option improves performance when the database is new or the ForceNew option has been set. Enabling this option, however, disables update tracking.

BeQuiet

Don't report errors (i.e., be quiet) while processing files.

ForceNew

Force the specified database to be truncated on open.


CAVEATS

Databases created from the same input may yield different, but equivalent, DBM files. Generally, DBM files are not portable across different platforms and operating systems. Therefore, the recommended method for exchanging or verifying a database is to dump it to a delimited file (see ftimes-dbm-dump(1)) and operate on that instead.

Take care to avoid mixing databaes that are based on different field types (i.e., keys). This can be easy to do if you're not careful.


AUTHOR

Klayton Monroe


SEE ALSO

ftimes-dbm-bash(1), ftimes-dbm-dump(1), ftimes-dbm-reap(1), ftimes-dbm-weed(1)


LICENSE

All documentation and code are distributed under same terms and conditions as FTimes.

Copyright 2000-2014 The FTimes Project, All Rights Reserved.
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