<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"> <HTML ><HEAD ><TITLE >sesam_seek_row</TITLE ><META NAME="GENERATOR" CONTENT="Modular DocBook HTML Stylesheet Version 1.79"><LINK REL="HOME" TITLE="PHP 手册" HREF="index.html"><LINK REL="UP" TITLE="SESAM Database Functions" HREF="ref.sesam.html"><LINK REL="PREVIOUS" TITLE="sesam_rollback" HREF="function.sesam-rollback.html"><LINK REL="NEXT" TITLE="sesam_settransaction" HREF="function.sesam-settransaction.html"><META HTTP-EQUIV="Content-type" CONTENT="text/html; charset=UTF-8"></HEAD ><BODY CLASS="refentry" BGCOLOR="#FFFFFF" TEXT="#000000" LINK="#0000FF" VLINK="#840084" ALINK="#0000FF" ><DIV CLASS="NAVHEADER" ><TABLE SUMMARY="Header navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TH COLSPAN="3" ALIGN="center" >PHP 手册</TH ></TR ><TR ><TD WIDTH="10%" ALIGN="left" VALIGN="bottom" ><A HREF="function.sesam-rollback.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="80%" ALIGN="center" VALIGN="bottom" ></TD ><TD WIDTH="10%" ALIGN="right" VALIGN="bottom" ><A HREF="function.sesam-settransaction.html" ACCESSKEY="N" >下一页</A ></TD ></TR ></TABLE ><HR ALIGN="LEFT" WIDTH="100%"></DIV ><H1 ><A NAME="function.sesam-seek-row" ></A >sesam_seek_row</H1 ><DIV CLASS="refnamediv" ><A NAME="AEN207229" ></A ><P > (PHP 3 CVS only)</P >sesam_seek_row -- Set scrollable cursor mode for subsequent fetches</DIV ><DIV CLASS="refsect1" ><A NAME="AEN207232" ></A ><H2 >说明</H2 >bool <B CLASS="methodname" >sesam_seek_row</B > ( string result_id, int whence [, int offset] )<BR ></BR ><P > Sets the scrollable cursor mode for subsequent fetches. </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN207247" ></A ><H2 >参数</H2 ><P > <P ></P ><DIV CLASS="variablelist" ><DL ><DT ><CODE CLASS="parameter" >result_id</CODE ></DT ><DD ><P > <CODE CLASS="parameter" >result_id</CODE > is a valid result id (select type queries only, and only if a "scrollable" cursor was requested when calling <A HREF="function.sesam-query.html" ><B CLASS="function" >sesam_query()</B ></A >). </P ></DD ><DT ><CODE CLASS="parameter" >whence</CODE ></DT ><DD ><P > <CODE CLASS="parameter" >whence</CODE > sets the global default value for the scrolling type, it specifies the scroll type to use in subsequent fetch operations on "scrollable" cursors, which can be set to the following predefined constants: <DIV CLASS="table" ><A NAME="AEN207264" ></A ><P ><B >表 1. Valid values for <CODE CLASS="parameter" >whence</CODE ></B ></P ><TABLE BORDER="1" CLASS="CALSTABLE" ><COL><COL><COL><THEAD ><TR ><TH >Value</TH ><TH >Constant</TH ><TH >Meaning</TH ></TR ></THEAD ><TBODY ><TR ><TD >0</TD ><TD ><TT CLASS="constant" ><B >SESAM_SEEK_NEXT</B ></TT ></TD ><TD >read sequentially </TD ></TR ><TR ><TD >1</TD ><TD ><TT CLASS="constant" ><B >SESAM_SEEK_PRIOR</B ></TT ></TD ><TD >read sequentially backwards </TD ></TR ><TR ><TD >2</TD ><TD ><TT CLASS="constant" ><B >SESAM_SEEK_FIRST</B ></TT ></TD ><TD > fetch first row (after fetch, the default is set to <TT CLASS="constant" ><B >SESAM_SEEK_NEXT</B ></TT >) </TD ></TR ><TR ><TD >3</TD ><TD ><TT CLASS="constant" ><B >SESAM_SEEK_LAST</B ></TT ></TD ><TD > fetch last row (after fetch, the default is set to <TT CLASS="constant" ><B >SESAM_SEEK_PRIOR</B ></TT >) </TD ></TR ><TR ><TD >4</TD ><TD ><TT CLASS="constant" ><B >SESAM_SEEK_ABSOLUTE</B ></TT ></TD ><TD > fetch absolute row number given as <CODE CLASS="parameter" >offset</CODE > (Zero-based. After fetch, the default is set to <TT CLASS="constant" ><B >SESAM_SEEK_ABSOLUTE</B ></TT >, and the offset value is auto-incremented) </TD ></TR ><TR ><TD >5</TD ><TD ><TT CLASS="constant" ><B >SESAM_SEEK_RELATIVE</B ></TT ></TD ><TD > fetch relative to current scroll position, where <CODE CLASS="parameter" >offset</CODE > can be a positive or negative offset value (this also sets the default "offset" value for subsequent fetches). </TD ></TR ></TBODY ></TABLE ></DIV > </P ></DD ><DT ><CODE CLASS="parameter" >offset</CODE ></DT ><DD ><P > An optional parameter which is only evaluated (and required) if <CODE CLASS="parameter" >whence</CODE > is either <TT CLASS="constant" ><B >SESAM_SEEK_RELATIVE</B ></TT > or <TT CLASS="constant" ><B >SESAM_SEEK_ABSOLUTE</B ></TT >. </P ></DD ></DL ></DIV > </P ></DIV ><DIV CLASS="refsect1" ><A NAME="AEN207317" ></A ><H2 >返回值</H2 ><P > 如果成功则返回 <TT CLASS="constant" ><B >TRUE</B ></TT >,失败则返回 <TT CLASS="constant" ><B >FALSE</B ></TT >。 </P ></DIV ><DIV CLASS="NAVFOOTER" ><HR ALIGN="LEFT" WIDTH="100%"><TABLE SUMMARY="Footer navigation table" WIDTH="100%" BORDER="0" CELLPADDING="0" CELLSPACING="0" ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" ><A HREF="function.sesam-rollback.html" ACCESSKEY="P" >上一页</A ></TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="index.html" ACCESSKEY="H" >起始页</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" ><A HREF="function.sesam-settransaction.html" ACCESSKEY="N" >下一页</A ></TD ></TR ><TR ><TD WIDTH="33%" ALIGN="left" VALIGN="top" >sesam_rollback</TD ><TD WIDTH="34%" ALIGN="center" VALIGN="top" ><A HREF="ref.sesam.html" ACCESSKEY="U" >上一级</A ></TD ><TD WIDTH="33%" ALIGN="right" VALIGN="top" >sesam_settransaction</TD ></TR ></TABLE ></DIV ></BODY ></HTML >