Case insensitive search. This is equivalent to prefixing the regex with '(?i)'.

Select the columns to search. See 'qsv select --help' for the full syntax.

Select only rows that did not match

Enable unicode support. When enabled, character classes will match all unicode word characters instead of only ASCII word characters. Decreases performance.

If given, the command will not filter rows but will instead flag the found rows in a new column named <column>, with the row numbers of the matched rows.

Return on first match with an exitcode of 0, returning the row number of the first match to stderr. Return exit code 1 if no match is found. No output is produced.

Return number of matches to stderr.

Set the approximate size limit (MB) of the compiled regular expression. If the compiled expression exceeds this number, then a compilation error is returned. Modify this only if you're getting regular expression compilation errors.

Set the approximate size of the cache (MB) used by the regular expression engine's Discrete Finite Automata. Modify this only if you're getting regular expression compilation errors.

When set, the first row will not be interpreted as headers. (i.e., They are not searched, analyzed, sliced, etc.)

The field delimiter for reading CSV data. Must be a single character.