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151 lines
3.5 KiB
Plaintext
151 lines
3.5 KiB
Plaintext
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$Header: /cvsroot/pgsql/doc/src/sgml/ref/move.sgml,v 1.8 2000/04/04 19:42:36 momjian Exp $
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Postgres documentation
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-->
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<refentry id="SQL-MOVE">
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<refmeta>
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<refentrytitle id="SQL-MOVE-TITLE">
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MOVE
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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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MOVE
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</refname>
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<refpurpose>
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Moves cursor position
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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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MOVE [ <replaceable class="PARAMETER">selector</replaceable> ] [ <replaceable class="PARAMETER">count</replaceable> ]
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{ IN | FROM } <replaceable class="PARAMETER">cursor</replaceable>
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</synopsis>
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</refsynopsisdiv>
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<refsect1 id="R1-SQL-MOVE-1">
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<refsect1info>
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<date>1998-09-24</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>MOVE</command> allows a user to move cursor position a specified
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number of rows.
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<command>MOVE</command> works like the <command>FETCH</command> command,
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but only positions the cursor and does
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not return rows.
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</para>
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<para>
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Refer to
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<xref linkend="sql-fetch-title" endterm="sql-fetch-title">
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for details on syntax and usage.
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</para>
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<refsect2 id="R2-SQL-MOVE-3">
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<refsect2info>
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<date>1998-09-24</date>
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</refsect2info>
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<title>
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Notes
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</title>
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<para>
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<command>MOVE</command> is a <productname>Postgres</productname>
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language extension.
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</para>
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<para>
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Refer to
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<xref linkend="sql-fetch-title" endterm="sql-fetch-title">
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for a description of valid arguments.
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Refer to
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<xref linkend="sql-declare-title" endterm="sql-declare-title">
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to define a cursor.
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Refer to
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<xref linkend="sql-begin-title" endterm="sql-begin-title">,
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<xref linkend="sql-commit-title" endterm="sql-commit-title">,
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and
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<xref linkend="sql-rollback-title" endterm="sql-rollback-title">
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for further information about transactions.
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</para>
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</refsect2>
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</refsect1>
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<refsect1 id="R1-SQL-MOVE-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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Set up and use a cursor:
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<programlisting>
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BEGIN WORK;
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DECLARE liahona CURSOR FOR SELECT * FROM films;
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-- Skip first 5 rows:
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MOVE FORWARD 5 IN liahona;
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<computeroutput>
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MOVE
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</computeroutput>
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-- Fetch 6th row in the cursor liahona:
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FETCH 1 IN liahona;
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<computeroutput>
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FETCH
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code | title | did | date_prod | kind | len
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-------+--------+-----+-----------+--------+-------
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P_303 | 48 Hrs | 103 | 1982-10-22| Action | 01:37
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(1 row)
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</computeroutput>
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-- close the cursor liahona and commit work:
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CLOSE liahona;
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COMMIT WORK;
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</programlisting>
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</para>
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</refsect1>
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<refsect1 id="R1-SQL-MOVE-3">
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<title>
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Compatibility
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</title>
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<refsect2 id="R2-SQL-MOVE-4">
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<refsect2info>
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<date>1998-09-01</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 <acronym>SQL92</acronym> <command>MOVE</command> statement.
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Instead, <acronym>SQL92</acronym> allows
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one to <command>FETCH</command> rows from an absolute cursor position,
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implicitly moving the cursor to the correct position.
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</para>
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</refsect2>
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</refsect1>
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</refentry>
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Local variables:
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End:
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-->
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