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><H1
><A
NAME="function.sesam-settransaction"
></A
>sesam_settransaction</H1
><DIV
CLASS="refnamediv"
><A
NAME="AEN207323"
></A
><P
> (PHP 3 CVS only)</P
>sesam_settransaction -- Set SESAM transaction parameters</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN207326"
></A
><H2
>说明</H2
>bool <B
CLASS="methodname"
>sesam_settransaction</B
> ( int isolation_level, int read_only )<BR
></BR
><P
> Overrides the default values for the <TT
CLASS="literal"
>isolation level</TT
>
and <TT
CLASS="literal"
>read-only</TT
> transaction parameters (which are set in
the SESAM configuration file), in order to optimize subsequent queries and
guarantee database consistency. The overridden values are used for the
next transaction only. See the SESAM handbook for detailed explanation of
the semantics.
</P
><P
> This function can only be called before starting a transaction, not after
the transaction has been started already.
</P
><P
> The values set by <B
CLASS="function"
>sesam_settransaction()</B
> will override
the default setting specified in the <A
HREF="ref.sesam.html#ini.sesam-configfile"
>SESAM configuration file</A
>.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN207344"
></A
><H2
>参数</H2
><P
> <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>isolation_level</CODE
></DT
><DD
><P
> <DIV
CLASS="table"
><A
NAME="AEN207353"
></A
><P
><B
>表 1.
Valid values for <CODE
CLASS="parameter"
>isolation_level</CODE
>
parameter
</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
>1</TD
><TD
><TT
CLASS="literal"
>SESAM_TXISOL_READ_UNCOMMITTED</TT
></TD
><TD
>Read Uncommitted</TD
></TR
><TR
><TD
>2</TD
><TD
><TT
CLASS="literal"
>SESAM_TXISOL_READ_COMMITTED</TT
></TD
><TD
>Read Committed</TD
></TR
><TR
><TD
>3</TD
><TD
><TT
CLASS="literal"
>SESAM_TXISOL_REPEATABLE_READ</TT
></TD
><TD
>Repeatable Read</TD
></TR
><TR
><TD
>4</TD
><TD
><TT
CLASS="literal"
>SESAM_TXISOL_SERIALIZABLE</TT
></TD
><TD
>Serializable</TD
></TR
></TBODY
></TABLE
></DIV
>
</P
></DD
><DT
><CODE
CLASS="parameter"
>read_only</CODE
></DT
><DD
><P
> <DIV
CLASS="table"
><A
NAME="AEN207388"
></A
><P
><B
>表 2.
Valid values for <CODE
CLASS="parameter"
>read_only</CODE
> parameter
</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="literal"
>SESAM_TXREAD_READWRITE</TT
></TD
><TD
>Read/Write</TD
></TR
><TR
><TD
>1</TD
><TD
><TT
CLASS="literal"
>SESAM_TXREAD_READONLY</TT
></TD
><TD
>Read-Only</TD
></TR
></TBODY
></TABLE
></DIV
>
</P
></DD
></DL
></DIV
>
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN207408"
></A
><H2
>返回值</H2
><P
> Returns <TT
CLASS="constant"
><B
>TRUE</B
></TT
> if the values are valid, and the
<TT
CLASS="literal"
>settransaction</TT
> operation was successful, <TT
CLASS="constant"
><B
>FALSE</B
></TT
>
otherwise.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN207414"
></A
><H2
>范例</H2
><P
> <TABLE
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CLASS="EXAMPLE"
><TR
><TD
><DIV
CLASS="example"
><A
NAME="AEN207417"
></A
><P
><B
>例 1. Setting SESAM transaction parameters</B
></P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
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><TR
><TD
><code><font color="#000000">
<font color="#0000BB"><?php<br />sesam_settransaction </font><font color="#007700">(</font><font color="#0000BB">SESAM_TXISOL_REPEATABLE_READ</font><font color="#007700">,<br /> </font><font color="#0000BB">SESAM_TXREAD_READONLY</font><font color="#007700">);<br /></font><font color="#0000BB">?></font>
</font>
</code></TD
></TR
></TABLE
></DIV
></TD
></TR
></TABLE
>
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