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>db2_lob_read</H1
><DIV
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><A
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></A
><P
> (no version information, might be only in CVS)</P
>db2_lob_read --
Gets a user defined size of LOB files with each invocation
</DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN77559"
></A
><H2
>Descrição</H2
>string <B
CLASS="methodname"
>db2_lob_read</B
> ( resource stmt, int colnum, int length )<BR
></BR
><P
> Use <B
CLASS="function"
>db2_lob_read()</B
> to iterate through a specified column of
a result set and retrieve a user defined size of LOB data.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN77575"
></A
><H2
>Parâmetros</H2
><P
> <P
></P
><DIV
CLASS="variablelist"
><DL
><DT
><CODE
CLASS="parameter"
>stmt</CODE
></DT
><DD
><P
> A valid <TT
CLASS="literal"
>stmt</TT
> resource containing LOB data.
</P
></DD
><DT
><CODE
CLASS="parameter"
>colnum</CODE
></DT
><DD
><P
> A valid column number in the result set of the <TT
CLASS="literal"
>stmt</TT
> resource.
</P
></DD
><DT
><CODE
CLASS="parameter"
>length</CODE
></DT
><DD
><P
> The size of the LOB data to be retrieved from the <TT
CLASS="literal"
>stmt</TT
> resource.
</P
></DD
></DL
></DIV
>
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN77597"
></A
><H2
>Valores de retornado</H2
><P
> Returns the amount of data the user specifies. Returns
<TT
CLASS="constant"
><B
>FALSE</B
></TT
> if the data cannot be retrieved.
</P
></DIV
><DIV
CLASS="refsect1"
><A
NAME="AEN77601"
></A
><H2
>Exemplos</H2
><P
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><P
><B
>Exemplo 1. Iterating through different types of data</B
></P
><P
> </P
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><code><font color="#000000">
<font color="#0000BB"><?php<br /><br /></font><font color="#FF8000">/* Database Connection Parameters */<br /></font><font color="#0000BB">$db </font><font color="#007700">= </font><font color="#DD0000">'SAMPLE'</font><font color="#007700">;<br /></font><font color="#0000BB">$username </font><font color="#007700">= </font><font color="#DD0000">'db2inst1'</font><font color="#007700">;<br /></font><font color="#0000BB">$password </font><font color="#007700">= </font><font color="#DD0000">'ibmdb2'</font><font color="#007700">;<br /><br /></font><font color="#FF8000">/* Obtain Connection Resource */<br /></font><font color="#0000BB">$conn </font><font color="#007700">= </font><font color="#0000BB">db2_connect</font><font color="#007700">(</font><font color="#0000BB">$db</font><font color="#007700">,</font><font color="#0000BB">$username</font><font color="#007700">,</font><font color="#0000BB">$password</font><font color="#007700">);<br /><br />if (</font><font color="#0000BB">$conn</font><font color="#007700">) {<br /> </font><font color="#0000BB">$drop </font><font color="#007700">= </font><font color="#DD0000">'DROP TABLE clob_stream'</font><font color="#007700">;<br /> </font><font color="#0000BB">$result </font><font color="#007700">= @</font><font color="#0000BB">db2_exec</font><font color="#007700">( </font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#0000BB">$drop </font><font color="#007700">);<br /><br /> </font><font color="#0000BB">$create </font><font color="#007700">= </font><font color="#DD0000">'CREATE TABLE clob_stream (id INTEGER, my_clob CLOB)'</font><font color="#007700">;<br /> </font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">db2_exec</font><font color="#007700">( </font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#0000BB">$create </font><font color="#007700">);<br /><br /> </font><font color="#0000BB">$variable </font><font color="#007700">= </font><font color="#DD0000">""</font><font color="#007700">;<br /> </font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">db2_prepare</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#DD0000">"INSERT INTO clob_stream (id,my_clob) VALUES (1, ?)"</font><font color="#007700">);<br /> </font><font color="#0000BB">$variable </font><font color="#007700">= </font><font color="#DD0000">"THIS IS A CLOB TEST. THIS IS A CLOB TEST."</font><font color="#007700">;<br /> </font><font color="#0000BB">db2_bind_param</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#DD0000">"variable"</font><font color="#007700">, </font><font color="#0000BB">DB2_PARAM_IN</font><font color="#007700">);<br /> </font><font color="#0000BB">db2_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /><br /> </font><font color="#0000BB">$sql </font><font color="#007700">= </font><font color="#DD0000">"SELECT id,my_clob FROM clob_stream"</font><font color="#007700">;<br /> </font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">db2_prepare</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#0000BB">$sql</font><font color="#007700">);<br /> </font><font color="#0000BB">db2_execute</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /> </font><font color="#0000BB">db2_fetch_row</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /> </font><font color="#0000BB">$i </font><font color="#007700">= </font><font color="#0000BB">0</font><font color="#007700">;<br /> </font><font color="#FF8000">/* Read LOB data */<br /> </font><font color="#007700">while (</font><font color="#0000BB">$data </font><font color="#007700">= </font><font color="#0000BB">db2_lob_read</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">2</font><font color="#007700">, </font><font color="#0000BB">6</font><font color="#007700">)) {<br /> echo </font><font color="#DD0000">"Loop $i: $data</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br /> </font><font color="#0000BB">$i </font><font color="#007700">= </font><font color="#0000BB">$i </font><font color="#007700">+ </font><font color="#0000BB">1</font><font color="#007700">;<br /> }<br /><br /> </font><font color="#0000BB">$drop </font><font color="#007700">= </font><font color="#DD0000">'DROP TABLE blob_stream'</font><font color="#007700">;<br /> </font><font color="#0000BB">$result </font><font color="#007700">= @</font><font color="#0000BB">db2_exec</font><font color="#007700">( </font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#0000BB">$drop </font><font color="#007700">);<br /><br /> </font><font color="#0000BB">$create </font><font color="#007700">= </font><font color="#DD0000">'CREATE TABLE blob_stream (id INTEGER, my_blob CLOB)'</font><font color="#007700">;<br /> </font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">db2_exec</font><font color="#007700">( </font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#0000BB">$create </font><font color="#007700">);<br /><br /> </font><font color="#0000BB">$variable </font><font color="#007700">= </font><font color="#DD0000">""</font><font color="#007700">;<br /> </font><font color="#0000BB">$stmt </font><font color="#007700">= </font><font color="#0000BB">db2_prepare</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#DD0000">"INSERT INTO blob_stream (id,my_blob) VALUES (1, ?)"</font><font color="#007700">);<br /> </font><font color="#0000BB">$variable </font><font color="#007700">= </font><font color="#DD0000">"THIS IS A BLOB TEST. THIS IS A BLOB TEST."</font><font color="#007700">;<br /> </font><font color="#0000BB">db2_bind_param</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">, </font><font color="#0000BB">1</font><font color="#007700">, </font><font color="#DD0000">"variable"</font><font color="#007700">, </font><font color="#0000BB">DB2_PARAM_IN</font><font color="#007700">);<br /> </font><font color="#0000BB">db2_execute</font><font color="#007700">(</font><font color="#0000BB">$stmt</font><font color="#007700">);<br /><br /> </font><font color="#0000BB">$sql </font><font color="#007700">= </font><font color="#DD0000">"SELECT id,my_blob FROM blob_stream"</font><font color="#007700">;<br /> </font><font color="#0000BB">$result </font><font color="#007700">= </font><font color="#0000BB">db2_prepare</font><font color="#007700">(</font><font color="#0000BB">$conn</font><font color="#007700">, </font><font color="#0000BB">$sql</font><font color="#007700">);<br /> </font><font color="#0000BB">db2_execute</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /> </font><font color="#0000BB">db2_fetch_row</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">);<br /> </font><font color="#0000BB">$i </font><font color="#007700">= </font><font color="#0000BB">0</font><font color="#007700">;<br /> </font><font color="#FF8000">/* Read LOB data */<br /> </font><font color="#007700">while (</font><font color="#0000BB">$data </font><font color="#007700">= </font><font color="#0000BB">db2_lob_read</font><font color="#007700">(</font><font color="#0000BB">$result</font><font color="#007700">, </font><font color="#0000BB">2</font><font color="#007700">, </font><font color="#0000BB">6</font><font color="#007700">)) {<br /> echo </font><font color="#DD0000">"Loop $i: $data</font><font color="#007700">\n</font><font color="#DD0000">"</font><font color="#007700">;<br /> </font><font color="#0000BB">$i </font><font color="#007700">= </font><font color="#0000BB">$i </font><font color="#007700">+ </font><font color="#0000BB">1</font><font color="#007700">;<br /> }<br />} else {<br /> echo </font><font color="#DD0000">'no connection: ' </font><font color="#007700">. </font><font color="#0000BB">db2_conn_errormsg</font><font color="#007700">();<br />}<br /><br /></font><font color="#0000BB">?></font>
</font>
</code></TD
></TR
></TABLE
><P
>O exemplo acima irá imprimir:</P
><TABLE
BORDER="0"
BGCOLOR="#E0E0E0"
CELLPADDING="5"
><TR
><TD
><PRE
CLASS="screen"
>Loop 0: THIS I
Loop 1: S A CL
Loop 2: OB TES
Loop 3: T. THI
Loop 4: S IS A
Loop 5: CLOB
Loop 6: TEST.
Loop 0: THIS I
Loop 1: S A BL
Loop 2: OB TES
Loop 3: T. THI
Loop 4: S IS A
Loop 5: BLOB
Loop 6: TEST.</PRE
></TD
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>
</P
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><DIV
CLASS="refsect1"
><A
NAME="AEN77610"
></A
><H2
>Veja também</H2
><P
> <P
></P
><TABLE
BORDER="0"
><TBODY
><TR
><TD
><A
HREF="function.db2-bind-param.html"
><B
CLASS="function"
>db2_bind_param()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-exec.html"
><B
CLASS="function"
>db2_exec()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-execute.html"
><B
CLASS="function"
>db2_execute()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-fetch-row.html"
><B
CLASS="function"
>db2_fetch_row()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-prepare.html"
><B
CLASS="function"
>db2_prepare()</B
></A
></TD
></TR
><TR
><TD
><A
HREF="function.db2-result.html"
><B
CLASS="function"
>db2_result()</B
></A
></TD
></TR
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><P
></P
>
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