taql - query language for casacore tables

Author

       This manual page was written by Benda Xu <heroxbd@gentoo.org>, for the Debian GNU/Linux system.

casacore                                           2014-10-24                                            taql(1)

Description

       The Table Query Language (TaQL) is an SQL-like high level language to do operations like selection, sort,
       and  update  on  a  casacore  table.  It is a very versatile language with full support for table columns
       containing array data. It has inherent support for masked arrays, units, and astronomical coordinates. It
       has a very rich set of functions (like cone search and array  reduction)  making  it  very  suitable  for
       astronomical  applications.  User  defined  functions  can  be  added easily. It also has full support of
       grouping/aggregation and nested queries. An operation that can be expressed in a single function  is  the
       matching of two sky catalogues.

       taql  can  be started with multiple arguments containing options and an optional TaQL command as the last
       argument.  It will run interactively if no TaQL command is given. If possible, interactive  commands  are
       kept in $HOME/.taqlhistory for later reuse.

       A binding in C++, Python, and Glish is available.

Name

       taql - query language for casacore tables

Options

-s,--style
              defines  the TaQL style. The default style is python; if no value is given after -s it defaults to
              glish.

       -h,--help
              show help and exits.

       -ps,--printselect
              show the values of selected columns.

       -pm,--printmeasure
              if possible, show values as formatted measures.

       -pc,--printcommand
              show the (expanded) TaQL command.

       -pr,--printrows
              show the number of rows selected, updated, etc.

       The default for -pc is on for interactive mode, otherwise off.  The default for -pr, -ps, and -pm is on.