Add documentation for reset, set, and show, and cross-reference in built-in.
This commit is contained in:
Thomas G. Lockhart
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.\" This is -*-nroff-*-
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.\" XXX standard disclaimer belongs here....
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.\" $Header: /cvsroot/pgsql/src/man/Attic/built-in.3,v 1.6 1997/04/27 19:26:24 thomas Exp $
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.\" $Header: /cvsroot/pgsql/src/man/Attic/built-in.3,v 1.7 1997/05/16 07:13:46 thomas Exp $
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.TH BUILT-INS INTRO 04/01/97 PostgreSQL PostgreSQL
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.SH "DESCRIPTION"
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This section describes the data types, functions and operators
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@ -79,9 +79,25 @@ types are either unique to Postgres, such as open and closed paths, or have
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several possibilities for formats, such as date and time types.
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.SH "Syntax of date and time types"
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Some date and time types share code for data input. For those types (currently
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.IR datetime
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and
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.IR abstime )
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the input can have any of a wide variety of styles. For numeric date representations,
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European and US conventions can differ, and the proper interpretation is obtained
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by using the
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.IR set (l)
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command before entering data.
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Output formats can be set to one of three styles:
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ISO-8601, SQL (traditional Oracle/Ingres), and traditional
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Postgres (see section on
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.IR "absolute time" )
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with the SQL style having European and US variants (see
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.IR set (l)).
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.SH "DATETIME"
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General-use date and time is input using a wide range of
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syntaxes, including ISO-compatible, SQL-compatible, traditional
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styles, including ISO-compatible, SQL-compatible, traditional
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Postgres (see section on
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.IR "absolute time")
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and other permutations of date and time. Output styles can be ISO-compatible,
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@ -1053,20 +1069,21 @@ sum |int2
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sum |int4
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sum |money
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\fBcount\fR is also available, where
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.BR count(*)
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returns a count of all rows while
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.BR count(column_name)
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returns a count of all non-null fields in the specified column.
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.fi
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\fBcount\fR is also available, where \fBcount(*)\fR returns a count of all
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rows while \fBcount(column_name)\fR returns a count of all non-null fields
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in the specified column.
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.in
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.SH "SEE ALSO"
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.IR set (l),
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.IR show (l),
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.IR reset (l).
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For examples on specifying literals of built-in types, see
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.IR SQL(l).
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.IR SQL (l).
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.SH BUGS
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.PP
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Although most of the input and output functions correponding to the
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Although most of the input and output functions corresponding to the
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base types (e.g., integers and floating point numbers) do some
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error-checking, some are not particularly rigorous about it. More
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importantly, few of the operators and functions (e.g.,
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.\" This is -*-nroff-*-
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.\" XXX standard disclaimer belongs here....
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.\" $Header: /cvsroot/pgsql/src/man/Attic/reset.l,v 1.1 1997/05/16 07:13:49 thomas Exp $
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.TH RESET SQL 05/14/97 PostgreSQL PostgreSQL
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.SH NAME
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reset \(em restore run-time parameters for session to default values
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.SH SYNOPSIS
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.nf
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\fBreset\fR variable
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.fi
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.SH DESCRIPTION
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.BR Reset
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will display the current configuration parameters for
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.IR variable
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during a session.
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.PP
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The session can be configured using
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.IR set (l),
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and values can be displayed using
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.IR show (l).
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Parameters and values are case-insensitive.
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.PP
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See
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.IR set (l)
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for more information on available variables.
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.SH EXAMPLES
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.nf
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tgl=> reset DateStyle;
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RESET VARIABLE
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tgl=> reset GEQO;
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RESET VARIABLE
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.fi
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.SH "SEE ALSO"
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built-in(3),
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set(l),
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show(l).
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.SH BUGS
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TBD
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.\" This is -*-nroff-*-
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.\" XXX standard disclaimer belongs here....
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.\" $Header: /cvsroot/pgsql/src/man/Attic/set.l,v 1.1 1997/05/16 07:13:52 thomas Exp $
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.TH SET SQL 05/14/97 PostgreSQL PostgreSQL
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.SH NAME
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set \(em set run-time parameters for session
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.SH SYNOPSIS
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.nf
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\fBset\fR variable \fBto\fR 'value1[,value2 ...]'
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.fi
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.SH DESCRIPTION
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.BR Set
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will modify configuration parameters for
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.IR variable
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during a session.
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.PP
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Current values can be obtained using
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.IR show (l),
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and values can be restored to the defaults using
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.IR reset (l).
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Parameters and values are case-insensitive.
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Note that the value field is always specified as a string, so
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is enclosed in single-quotes.
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.PP
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.IR DateStyle
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determines the output format for the date and time data types.
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See
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.IR "built-in" (3)
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for more information on available styles.
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.if n .ta 5 +15 +40
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.if t .ta 0.5i +1.5i +3.0i
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.in 0
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.nf
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DateStyle
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ISO - use ISO 8601-style dates and times
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SQL - use Oracle/Ingres-style dates and times
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Postgres - use traditional Postgres format
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European - use dd/mm/yyyy for numeric date representations.
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NonEuropean - use mm/dd/yyyy for numeric date representations.
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US - same as 'NonEuropean'
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default - restores the default values ('US,Postgres')
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.fi
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.PP
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.IR GEQO
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enables or disables the genetic optimizer algorithm. This algorithm is
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.IR on
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by default. See the GEQO README for more information.
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.if n .ta 5 +15 +40
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.if t .ta 0.5i +1.5i +3.0i
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.in 0
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.nf
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GEQO
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on - turn the genetic optimizer 'on'
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off - duh
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.fi
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.SH EXAMPLES
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.nf
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--
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--Set the style of date to ISO
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--
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set DateStyle to 'ISO'
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.fi
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.PP
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.nf
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--
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--Set the style of date to SQL with European conventions
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--
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set DateStyle to 'SQL,European'
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.fi
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.PP
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.nf
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--
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--Turn off the genetic optimizer
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--
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set GEQO to 'off'
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.fi
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.SH "SEE ALSO"
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built-in(3),
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reset(l),
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show(l).
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.SH BUGS
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Of course.
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@ -0,0 +1,41 @@
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.\" This is -*-nroff-*-
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.\" XXX standard disclaimer belongs here....
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.\" $Header: /cvsroot/pgsql/src/man/Attic/show.l,v 1.1 1997/05/16 07:13:54 thomas Exp $
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.TH SHOW SQL 05/14/97 PostgreSQL PostgreSQL
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.SH NAME
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show \(em show run-time parameters for session
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.SH SYNOPSIS
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.nf
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\fBshow\fR variable
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.fi
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.SH DESCRIPTION
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.BR Show
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will display the current configuration parameters for
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.IR variable
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during a session.
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.PP
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The session can be configured using
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.IR set (l),
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and values can be restored to the defaults using
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.IR reset (l).
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Parameters and values are case-insensitive.
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.PP
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See
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.IR set (l)
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for more information on available variables.
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.SH EXAMPLES
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.nf
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tgl=> show DateStyle;
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NOTICE:DateStyle is Postgres with US (NonEuropean) conventions
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SHOW VARIABLE
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tgl=> show GEQO;
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NOTICE:GEQO is ON
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SHOW VARIABLE
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.fi
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.SH "SEE ALSO"
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built-in(3),
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reset(l),
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set(l).
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.SH BUGS
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TBD
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