2014-03-01 23:53 GMT+01:00 Fabrízio de Royes Mello <fabriziome...@gmail.com>
:
>
> On Sat, Mar 1, 2014 at 5:37 AM, Pavel Stehule <pavel.steh...@gmail.com>
> wrote:
> >
> > Hello
> >
> > here is a prototype:
> >
> > bash-4.1$ /usr/local/pgsql/bin/psql --help-variables
> > List of some variables (options) for use from command line.
> > Complete list you find in psql section in the PostgreSQL documentation.
> >
> > psql variables:
> > Usage:
> > psql --set=NAME=VALUE
> > or \set NAME VALUE in interactive mode
> >
> > AUTOCOMMIT when is on, successful SQL command is automatically
> commited
> > COMP_KEYWORD_CASE determines which letter case to use when completing
> an SQL key word
> > ECHO all lines from input can be written to standard
> output
> > ECHO_HIDDEN display queries for internal commands (same as -E
> option)
> > FETCH_COUNT how many rows should be for one page (default 0
> unlimited)
> > HISTFILE file name that be used for store history list
> > HISTSIZE the number of commands to store in the command
> history
> > ON_ERROR_ROLLBACK when is on, raise ROLLBACK on error automatically
> > ON_ERROR_STOP when is set, then batch execution stop immediately
> after error
> > VERBOSITY control verbosity of error reports [default,
> verbose, terse]
> >
> > Printing options:
> > Usage:
> > psql --pset=NAME[=VALUE]
> > or \pset NAME [VALUE] in interactive mode
> >
> > border number of border style
> > fieldsep specify field separator for unaligned output
> > fieldsep_zero field separator in unaligned mode will be zero
> > format set output format [unaligned, aligned, wrapped,
> html, latex, ..]
> > linestyle sets the border line drawing style [ascii,
> old-ascii, unicode]
> > null sets the string to be printed in place of a null
> value
> > pager when the pager option is off, the pager program is
> not used
> > recordsep specifies the record (line) separator to use in
> unaligned output format
> > recordsep_zero record separator be in unaligned output format a
> zero byte
> > title sets the table title for any subsequently printed
> tables
> > tuples_only in tuples-only mode, only actual table data is shown
> >
> > Environment options:
> > Usage:
> > NAME=VALUE, [NAME=VALUE] psql ...
> > or \setenv NAME [VALUE] in interactive mode
> >
> > COLUMNS number of columns for wrapped format
> > PAGER used pager
> > PGHOST same as the host connection parameter
> > PGDATABASE same as the dbname connection parameter
> > PGUSER same as the user connection parameter
> > PGPASSWORD possibility to set password
> > PSQL_EDITOR, EDITOR, VISUAL editor used by \e \ef commands
> > PSQL_EDITOR_LINE_NUMBER_ARG style how to line number is used in editor
> > PSQL_HISTORY alternative location for the command history file
> > PSQL_RC alternative location of the user's .psqlrc file
> > SHELL command executed by the \! command
> > TMPDIR directory for storing temporary files
> >
> > For more information consult the psql section in the PostgreSQL
> > documentation.
> >
>
> The patch is ok (apply to master and apply to master without errors).
>
> Maybe we must show the possible values for each variable/option too.
>
Not all options are writeable - and too long option list should be less
readable - It should not to supply documentation
>
> Thinking more about it, would be nice if we have the possibility to show
> help for commands too. Some like that:
>
This can be implemented as alias probably, so it is not necessary - but I
agree, so it is interesting and valid idea
Regards
Pavel
>
> $ psql -H vacuum
> Command: VACUUM
> Description: garbage-collect and optionally analyze a database
> Syntax:
> VACUUM [ ( { FULL | FREEZE | VERBOSE | ANALYZE } [, ...] ) ] [ table_name
> [ (column_name [, ...] ) ] ]
> VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] [ table_name ]
> VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] ANALYZE [ table_name [ (column_name
> [, ...] ) ] ]
>
> $ psql --help-command=vacuum
> Command: VACUUM
> Description: garbage-collect and optionally analyze a database
> Syntax:
> VACUUM [ ( { FULL | FREEZE | VERBOSE | ANALYZE } [, ...] ) ] [ table_name
> [ (column_name [, ...] ) ] ]
> VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] [ table_name ]
> VACUUM [ FULL ] [ FREEZE ] [ VERBOSE ] ANALYZE [ table_name [ (column_name
> [, ...] ) ] ]
>
> It's only an idea that occurred to me reading this thread!
>
> Grettings,
>
> --
> Fabrízio de Royes Mello
> Consultoria/Coaching PostgreSQL
> >> Timbira: http://www.timbira.com.br
> >> Blog sobre TI: http://fabriziomello.blogspot.com
> >> Perfil Linkedin: http://br.linkedin.com/in/fabriziomello
> >> Twitter: http://twitter.com/fabriziomello
>
