Add documentation for comment.
This commit is contained in:
Bruce Momjian
parent
577e21b34f
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<!--
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/comment.sgml,v 1.1 1999/10/26 03:48:58 momjian Exp $
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Postgres documentation
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-->
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<refentry id="SQL-COMMENT">
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<refmeta>
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<refentrytitle id="SQL-COMMENT-TITLE">
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COMMENT
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</refentrytitle>
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<refmiscinfo>SQL - Language Statements</refmiscinfo>
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</refmeta>
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<refnamediv>
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<refname>
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COMMENT
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</refname>
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<refpurpose>
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Add comment to an object
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</refpurpose>
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</refnamediv>
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<refsynopsisdiv>
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<refsynopsisdivinfo>
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<date>1999-07-20</date>
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</refsynopsisdivinfo>
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<synopsis>
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COMMENT ON
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[
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[ DATABASE | INDEX | RULE | SEQUENCE | TABLE | TYPE | VIEW ]
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<replaceable class="PARAMETER">object_name</replaceable> |
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COLUMN <replaceable class="PARAMETER">table_name</replaceable>.<replaceable class="PARAMETER">column_name</replaceable>|
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AGGREGATE <replaceable class="PARAMETER">agg_name</replaceable> <replaceable class="PARAMETER">agg_type</replaceable>|
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FUNCTION <replaceable class="PARAMETER">func_name</replaceable> (<replaceable class="PARAMETER">arg1</replaceable>, <replaceable class="PARAMETER">arg2</replaceable>, ...)|
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OPERATOR <replaceable class="PARAMETER">op</replaceable> (<replaceable class="PARAMETER">leftoperand_type</replaceable> <replaceable class="PARAMETER">rightoperand_type</replaceable>) |
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TRIGGER <replaceable class="PARAMETER">trigger_name</replaceable> ON <replaceable class="PARAMETER">table_name</replaceable>
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] IS <replaceable class="PARAMETER">'text'</replaceable>
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</synopsis>
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<refsect2 id="R2-SQL-COMMENT-1">
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<refsect2info>
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<date>1999-10-25</date>
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</refsect2info>
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<title>
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Inputs
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</title>
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<para>
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<variablelist>
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<varlistentry>
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<term><replaceable class="PARAMETER">object_name, table_name,
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column_name, agg_name, func_name, op, trigger_name</replaceable></term>
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<listitem>
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<para>
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The name of the object to be be commented.
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</para>
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</listitem>
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</varlistentry>
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<varlistentry>
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<term><replaceable class="PARAMETER">text</replaceable></term>
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<listitem>
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<para>
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The comment to add.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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<refsect2 id="R2-SQL-COMMENT-2">
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<refsect2info>
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<date>1998-09-08</date>
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</refsect2info>
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<title>
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Outputs
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</title>
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<para>
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<variablelist>
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<varlistentry>
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<term><computeroutput>
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COMMENT
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</computeroutput></term>
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<listitem>
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<para>
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Message returned if the table is successfully commented.
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</para>
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</listitem>
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</varlistentry>
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</variablelist>
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</para>
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</refsect2>
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</refsynopsisdiv>
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<refsect1 id="R1-SQL-COMMENT-1">
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<refsect1info>
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<date>1998-10-25</date>
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</refsect1info>
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<title>
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Description
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</title>
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<para>
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<command>COMMENT</command> adds a comment to an object that can be
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easily retrieved with <application>psql's</application>
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<emphasize>\dd</emphasize> command.
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To remove a comment, use <literal>''</literal>.
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</para>
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</refsect1>
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<refsect1 id="R1-SQL-COMMENT-2">
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<title>
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Usage
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</title>
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<para>
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comment the table <literal>mytable</literal>:
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<programlisting>
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COMMENT ON mytable IS 'This is my table.';
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</programlisting>
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</para>
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</refsect1>
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<refsect1 id="R1-SQL-COMMENT-3">
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<title>
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Compatibility
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</title>
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<refsect2 id="R2-SQL-COMMENT-4">
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<refsect2info>
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<date>1998-09-08</date>
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</refsect2info>
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<title>
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SQL92
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</title>
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<para>
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There is no <command>COMMENT</command> in <acronym>SQL92</acronym>.
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</para>
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</refsect2>
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</refsect1>
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</refentry>
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<!-- Keep this comment at the end of the file
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Local variables:
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mode: sgml
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sgml-omittag:t
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sgml-shorttag:t
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sgml-minimize-attributes:nil
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sgml-always-quote-attributes:t
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sgml-indent-step:1
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sgml-indent-data:t
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sgml-parent-document:nil
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sgml-default-dtd-file:"../reference.ced"
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sgml-exposed-tags:nil
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sgml-local-catalogs:"/usr/lib/sgml/catalog"
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sgml-local-ecat-files:nil
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End:
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-->
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@ -5,7 +5,7 @@
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*
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* Copyright (c) 1994, Regents of the University of California
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*
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* $Id: psqlHelp.h,v 1.77 1999/10/02 21:33:29 tgl Exp $
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* $Id: psqlHelp.h,v 1.78 1999/10/26 03:48:58 momjian Exp $
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*
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*-------------------------------------------------------------------------
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*/
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@ -25,9 +25,9 @@ static struct _helpStruct QL_HELP[] = {
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{"alter table",
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"add/rename columns, rename tables",
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"\
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\tALTER TABLE tablename [*] ADD COLUMN colname type\n\
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\tALTER TABLE tablename [*] RENAME [COLUMN] colname1 TO colname2\n\
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\tALTER TABLE tablename1 RENAME TO tablename2"},
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\tALTER TABLE table_name [*] ADD COLUMN column_name type\n\
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\tALTER TABLE table_name [*] RENAME [COLUMN] column_name1 TO column_name2\n\
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\tALTER TABLE table_name1 RENAME TO table_name2"},
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{"alter user",
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"alter system information for a user",
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"\
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@ -41,14 +41,26 @@ static struct _helpStruct QL_HELP[] = {
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"begin a new transaction",
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"\
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\tBEGIN [WORK|TRANSACTION];"},
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{"cluster",
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"create a clustered index (from an existing index)",
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"\
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\tCLUSTER index_name ON relation_name"},
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{"close",
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"close an existing cursor (cursor)",
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"\
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\tCLOSE cursorname;"},
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{"cluster",
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"create a clustered index (from an existing index)",
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"\
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\tCLUSTER index_name ON relation_name"},
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{"comment",
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"add comment on object",
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"\
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\tCOMMENT ON\n\
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[\n\
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[ DATABASE | INDEX | RULE | SEQUENCE | TABLE | TYPE | VIEW ] <object_name> |\n\
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COLUMN <table_name>.<column_name>|\n\
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AGGREGATE <agg_name> <agg_type>|\n\
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FUNCTION <func_name> (arg1, arg2, ...)|\n\
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OPERATOR <op> (leftoperand_type rightoperand_type) |\n\
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TRIGGER <trigger_name> ON <table_name>\n\
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] IS 'text'},
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{"commit work",
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"commit a transaction",
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"\
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@ -56,7 +68,7 @@ static struct _helpStruct QL_HELP[] = {
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{"copy",
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"copy data to and from a table",
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"\
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\tCOPY [BINARY] tablename [WITH OIDS]\n\
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\tCOPY [BINARY] table_name [WITH OIDS]\n\
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\tTO|FROM filename|STDIN|STDOUT [USING DELIMITERS 'delim'];"},
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{"create",
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"Please be more specific:",
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@ -88,21 +100,22 @@ static struct _helpStruct QL_HELP[] = {
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"create a user-defined function",
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"\
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\tCREATE FUNCTION function_name ([type1, ...typeN]) RETURNS return_type\n\
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\t[WITH ( attributes )]\n\
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\t[WITH ( column_names )]\n\
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\tAS 'sql_queries'|'builtin_function_name'|'procedural_commands'\n\
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\tLANGUAGE 'sql'|'internal'|'procedural_language_name';\n\
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\n\
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OR\n\
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\n\
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\tCREATE FUNCTION function_name ([type1, ...typeN]) RETURNS return_type\n\
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\t[WITH ( attributes )]\n\
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\t[WITH ( column_names )]\n\
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\tAS 'object_filename' [, 'link_symbol']\n\
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\tLANGUAGE 'C';"},
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{"create index",
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"construct an index",
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"\
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\tCREATE [UNIQUE] INDEX indexname ON tablename [USING access_method]\n\
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( colname1 [type_class1], ...colnameN | funcname(colname1, ...) [type_class] );"},
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\tCREATE [UNIQUE] INDEX indexname ON table_name [USING access_method]\n\
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( column_name1 [type_class1], ...column_nameN |\n\
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funcname(column_name1, ...) [type_class] );"},
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{"create operator",
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"create a user-defined operator",
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"\
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@ -117,7 +130,7 @@ OR\n\
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"\
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\tCREATE RULE rule_name AS ON\n\
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\t{ SELECT | UPDATE | DELETE | INSERT }\n\
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\tTO object [WHERE qual]\n\
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\tTO object_name [WHERE qual]\n\
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\tDO [INSTEAD] [action|NOTHING|[actions]];"},
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{"create sequence",
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"create a new sequence number generator",
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@ -132,16 +145,16 @@ OR\n\
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{"create table",
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"create a new table",
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"\
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\tCREATE [TEMP] TABLE tablename\n\
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\t(colname1 type1 [DEFAULT expression] [NOT NULL], ...colnameN\n\
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\tCREATE [TEMP] TABLE table_name\n\
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\t(column_name1 type1 [DEFAULT expression] [NOT NULL], ...column_nameN\n\
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\t[[CONSTRAINT name] CHECK condition1, ...conditionN] )\n\
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\t[INHERITS (tablename1, ...tablenameN)\n\
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\t[INHERITS (table_name1, ...table_nameN)\n\
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;"},
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{"create trigger",
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"create a new trigger",
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"\
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\tCREATE TRIGGER trigger_name AFTER|BEFORE event1 [OR event2 [OR event3] ]\n\
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\tON tablename FOR EACH ROW|STATEMENT\n\
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\tON table_name FOR EACH ROW|STATEMENT\n\
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\tEXECUTE PROCEDURE func_name ([arguments])\n\
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\n\
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\teventX is one of INSERT, DELETE, UPDATE"},
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@ -167,27 +180,27 @@ OR\n\
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"create a view",
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"\
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\tCREATE VIEW view_name AS\n\
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\tSELECT [DISTINCT [ON colnameN]]\n\
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\texpr1 [AS colname1], ...exprN\n\
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\t[FROM from_list]\n\
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\tSELECT [DISTINCT [ON column_nameN]]\n\
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\texpr1 [AS column_name1], ...exprN\n\
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\t[FROM table_list]\n\
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\t[WHERE qual]\n\
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\t[GROUP BY group_list];"},
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{"declare",
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"set up a cursor",
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"\
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\tDECLARE cursorname [BINARY] CURSOR FOR\n\
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\tSELECT [DISTINCT [ON colnameN]]\n\
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\texpr1 [AS colname1], ...exprN\n\
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\t[FROM from_list]\n\
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\tSELECT [DISTINCT [ON column_nameN]]\n\
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\texpr1 [AS column_name1], ...exprN\n\
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\t[FROM table_list]\n\
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\t[WHERE qual]\n\
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\t[GROUP BY group_list]\n\
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\t[HAVING having_clause]\n\
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\t[ORDER BY colname1 [USING op1], ...colnameN]\n\
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\t[ORDER BY column_name1 [USING op1], ...column_nameN]\n\
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\t[ { UNION [ALL] | INTERSECT | EXCEPT } SELECT ...];"},
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{"delete",
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"delete tuples",
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"\
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\tDELETE FROM tablename [WHERE qual];"},
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\tDELETE FROM table_name [WHERE qual];"},
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{"drop",
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"Please be more specific:",
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"\
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@ -233,11 +246,11 @@ OR\n\
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{"drop table",
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"remove a table",
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"\
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\tDROP TABLE tablename1, ...tablenameN;"},
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\tDROP TABLE table_name1, ...table_nameN;"},
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{"drop trigger",
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"remove a trigger",
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"\
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\tDROP TRIGGER trigger_name ON tablename;"},
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\tDROP TRIGGER trigger_name ON table_name;"},
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{"drop type",
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"remove a user-defined base type",
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"\
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@ -271,11 +284,11 @@ OR\n\
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{"insert",
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"insert tuples",
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"\
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\tINSERT INTO tablename [(colname1, ...colnameN)]\n\
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\tINSERT INTO table_name [(column_name1, ...column_nameN)]\n\
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\tVALUES (expr1,..exprN) |\n\
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\tSELECT [DISTINCT [ON colnameN]]\n\
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\tSELECT [DISTINCT [ON column_nameN]]\n\
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\texpr1, ...exprN\n\
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\t[FROM from_clause]\n\
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\t[FROM table_list]\n\
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\t[WHERE qual]\n\
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\t[GROUP BY group_list]\n\
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\t[HAVING having_clause]\n\
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@ -291,7 +304,7 @@ OR\n\
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{"lock",
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"exclusive lock a table inside a transaction",
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"\
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\tLOCK [TABLE] tablename \n\
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\tLOCK [TABLE] table_name \n\
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\t[IN [ROW|ACCESS] [SHARE|EXCLUSIVE] | [SHARE ROW EXCLUSIVE] MODE];"},
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{"move",
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"move an cursor position",
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@ -319,15 +332,15 @@ TIMEZONE|XACTISOLEVEL|CLIENT_ENCODING|SERVER_ENCODING"},
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{"select",
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"retrieve tuples",
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"\
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\tSELECT [DISTINCT [ON colnameN]] expr1 [AS colname1], ...exprN\n\
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\t[INTO [TEMP] [TABLE] tablename]\n\
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\t[FROM from_list]\n\
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\tSELECT [DISTINCT [ON column_nameN]] expr1 [AS column_name1], ...exprN\n\
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\t[INTO [TEMP] [TABLE] table_name]\n\
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\t[FROM table_list]\n\
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\t[WHERE qual]\n\
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\t[GROUP BY group_list]\n\
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\t[HAVING having_clause]\n\
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\t[ { UNION [ALL] | INTERSECT | EXCEPT } SELECT ...]\n\
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\t[ORDER BY colname1 [ASC|DESC] [USING op1], ...colnameN ]\n\
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\t[FOR UPDATE [OF tablename...]]\n\
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\t[ORDER BY column_name1 [ASC|DESC] [USING op1], ...column_nameN ]\n\
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\t[FOR UPDATE [OF table_name...]]\n\
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\t[LIMIT count [OFFSET|, count]];"},
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{"set",
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"set run-time environment",
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@ -358,18 +371,18 @@ TIMEZONE|XACTISOLEVEL|CLIENT_ENCODING|SERVER_ENCODING"},
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{"truncate",
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"quickly removes all rows from a table",
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"\
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\tTRUNCATE TABLE tablename"},
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\tTRUNCATE TABLE table_name"},
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{"update",
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"update tuples",
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"\
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\tUPDATE tablename SET colname1 = expr1, ...colnameN = exprN\n\
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\t[FROM from_clause]\n\
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\tUPDATE table_name SET column_name1 = expr1, ...column_nameN = exprN\n\
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\t[FROM table_list]\n\
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\t[WHERE qual];"},
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{"vacuum",
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"vacuum the database, i.e. cleans out deleted records, updates statistics",
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"\
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\tVACUUM [VERBOSE] [ANALYZE] [table]\n\
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\tor\n\
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\tVACUUM [VERBOSE] ANALYZE [table [(colname1, ...colnameN)]];"},
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\tVACUUM [VERBOSE] ANALYZE [table [(column_name1, ...column_nameN)]];"},
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{NULL, NULL, NULL} /* important to keep a NULL terminator here!*/
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};
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