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<title>Considerations for using distributed relational database</title>
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<h2 id="diftab2"><a href="rbafzmst02.htm#ToC_1489">Considerations for using distributed relational database</a></h2><a id="idx3398" name="idx3398"></a><a id="idx3399" name="idx3399"></a><a id="idx3400" name="idx3400"></a><a id="idx3401" name="idx3401"></a>
<p>This section contains information that may be useful in developing applications
that use application servers which are not the same product as their application requesters.</p>
<p>All DB2 Universal Database&trade; products support extensions to IBM&reg; SQL.
Some of these extensions are product-specific, but many are already shared
by more than one product or support is planned but not yet generally available.</p>
<p>For the most part, an application can use the statements and clauses that
are supported by the database manager of the current server, even though that
application might be running through the application requester of a database
manager that does not support some of those statements and clauses. Restrictions
to this general rule are identified by application requester: </p>
<ul>
<li>for DB2 UDB for z/OS Application Server application requester, see <a href="rbafzmstdiftab2.htm#dif1">Table 84</a></li>
<li>for DB2 UDB for iSeries Application Server application requester, see<a href="rbafzmstdiftab2.htm#dif3">Table 85</a></li>
<li>for DB2 UDB LUW application requester, see <a href="rbafzmstdiftab2.htm#dif4">Table 86</a>.</li></ul>
<p>Note that an 'R' in the table indicates that this SQL function
is not supported in the specified environment. An 'R' in every column
of the same row means that the function is available only if the current server
and requester are the same product or that the statement is blocked by the
application requester from being processed at the application server.</p>
<a name="dif1"></a>
<table id="dif1" width="100%" summary="" border="1" frame="hsides" rules="rows">
<caption>Table 84. DB2 UDB for z/OS Application Requester</caption>
<thead valign="bottom">
<tr>
<th id="wq1935" width="40%" align="left" valign="bottom">SQL Statement
or Function</th>
<th id="wq1936" width="20%" align="left" valign="bottom">DB2 UDB for z/OS Application Server</th>
<th id="wq1937" width="20%" align="left" valign="bottom">DB2 UDB for iSeries Application Server</th>
<th id="wq1938" width="20%" align="left" valign="bottom">DB2 UDB LUW Application Server</th>
</tr>
</thead>
<tbody valign="top">
<tr>
<td align="left" valign="top" headers="wq1935">COMMIT HOLD</td>
<td align="center" valign="top" headers="wq1936">R</td>
<td align="center" valign="top" headers="wq1937">R</td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">DECLARE STATEMENT</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937"></td>
<td align="center" valign="top" headers="wq1938"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">DECLARE TABLE</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937"></td>
<td align="center" valign="top" headers="wq1938"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">DECLARE VARIABLE</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937"></td>
<td align="center" valign="top" headers="wq1938"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">DESCRIBE TABLE</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937"></td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">DESCRIBE with
USING clause</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937"></td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">DISCONNECT</td>
<td align="center" valign="top" headers="wq1936">R</td>
<td align="center" valign="top" headers="wq1937">R</td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">BIGINT Data
Types</td>
<td align="center" valign="top" headers="wq1936">R</td>
<td align="center" valign="top" headers="wq1937"><sup class="fn"><a href="rbafzmstdiftab2.htm#dif102">98</a></sup></td>
<td align="center" valign="top" headers="wq1938"><sup class="fn"><a href="rbafzmstdiftab2.htm#dif102">98</a></sup></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">ROWID Data
Types</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937"></td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">DATALINK Data
Types</td>
<td align="center" valign="top" headers="wq1936">R</td>
<td align="center" valign="top" headers="wq1937">R</td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">BINARY and
VARBINARY Data Types</td>
<td align="center" valign="top" headers="wq1936">R</td>
<td align="center" valign="top" headers="wq1937">R</td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">Host declarations
not documented in language specific appendices</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937"><sup class="fn"><a href="rbafzmstdiftab2.htm#dif101">99</a></sup></td>
<td align="center" valign="top" headers="wq1938"><sup class="fn"><a href="rbafzmstdiftab2.htm#dif101">99</a></sup></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">PREPARE with
USING clause</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937"></td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">ROLLBACK HOLD</td>
<td align="center" valign="top" headers="wq1936">R</td>
<td align="center" valign="top" headers="wq1937">R</td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">SET CURRENT
PACKAGESET</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937"></td>
<td align="center" valign="top" headers="wq1938"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">SET variable</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937">R</td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">SET TRANSACTION</td>
<td align="center" valign="top" headers="wq1936">R</td>
<td align="center" valign="top" headers="wq1937">R</td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">Scrollable
Cursor statements</td>
<td align="center" valign="top" headers="wq1936">R</td>
<td align="center" valign="top" headers="wq1937">R</td>
<td align="center" valign="top" headers="wq1938">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1935">UPDATE cursor
- FOR UPDATE clause not specified</td>
<td align="center" valign="top" headers="wq1936"></td>
<td align="center" valign="top" headers="wq1937"></td>
<td align="center" valign="top" headers="wq1938"></td>
</tr>
</tbody>
</table><a id="idx3402" name="idx3402"></a><a id="idx3403" name="idx3403"></a>
<a name="dif3"></a>
<table id="dif3" width="100%" summary="" border="1" frame="hsides" rules="rows">
<caption>Table 85. DB2 UDB for iSeries Application Requester</caption>
<thead valign="bottom">
<tr>
<th id="wq1939" width="40%" align="left" valign="bottom">SQL Statement or Function</th>
<th id="wq1940" width="20%" align="left" valign="bottom">DB2 UDB for z/OS Application Server</th>
<th id="wq1941" width="20%" align="left" valign="bottom">DB2 UDB for iSeries Application Server</th>
<th id="wq1942" width="20%" align="left" valign="bottom">DB2 UDB LUW Application Server</th>
</tr>
</thead>
<tbody valign="top">
<tr>
<td align="left" valign="top" headers="wq1939">COMMIT HOLD</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">DECLARE STATEMENT</td>
<td align="center" valign="top" headers="wq1940"></td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">DECLARE TABLE</td>
<td align="center" valign="top" headers="wq1940"></td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">DECLARE VARIABLE</td>
<td align="center" valign="top" headers="wq1940"></td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">DESCRIBE TABLE</td>
<td align="center" valign="top" headers="wq1940"></td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">DESCRIBE with USING clause</td>
<td align="center" valign="top" headers="wq1940"></td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">DISCONNECT</td>
<td align="center" valign="top" headers="wq1940"></td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">Host Variables - optional colon</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941">R</td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">BIGINT Data
Types</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">ROWID Data
Types</td>
<td align="center" valign="top" headers="wq1940"></td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">DATALINK Data
Types</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">BINARY and
VARBINARY Data Types</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">Host declarations not documented
in language specific appendices</td>
<td align="center" valign="top" headers="wq1940"><sup class="fn"><a href="rbafzmstdiftab2.htm#dif101">99</a></sup></td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942"><sup class="fn"><a href="rbafzmstdiftab2.htm#dif101">99</a></sup></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">PREPARE with USING clause</td>
<td align="center" valign="top" headers="wq1940"></td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">ROLLBACK HOLD</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">SET CURRENT PACKAGESET</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941">R</td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">SET variable</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941">R</td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">SET TRANSACTION</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">Scrollable Cursor statements</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1939">UPDATE cursor - FOR UPDATE clause not specified</td>
<td align="center" valign="top" headers="wq1940">R</td>
<td align="center" valign="top" headers="wq1941"></td>
<td align="center" valign="top" headers="wq1942"></td>
</tr>
</tbody>
</table><a id="idx3404" name="idx3404"></a><a id="idx3405" name="idx3405"></a>
<a name="dif4"></a>
<table id="dif4" width="100%" summary="" border="1" frame="hsides" rules="rows">
<caption>Table 86. DB2 UDB LUW Application Requester</caption>
<thead valign="bottom">
<tr>
<th id="wq1943" width="40%" align="left" valign="bottom">SQL Statement or Function</th>
<th id="wq1944" width="20%" align="left" valign="bottom">DB2 UDB for z/OS Application Server</th>
<th id="wq1945" width="20%" align="left" valign="bottom">DB2 UDB for iSeries Application Server</th>
<th id="wq1946" width="20%" align="left" valign="bottom">DB2 UDB LUW Application Server</th>
</tr>
</thead>
<tbody valign="top">
<tr>
<td align="left" valign="top" headers="wq1943">COMMIT HOLD</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">DECLARE STATEMENT</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">DECLARE TABLE</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">DECLARE VARIABLE</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">DESCRIBE TABLE</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">DESCRIBE with USING clause</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">DISCONNECT</td>
<td align="center" valign="top" headers="wq1944"></td>
<td align="center" valign="top" headers="wq1945"></td>
<td align="center" valign="top" headers="wq1946"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">Host Variables - optional colon</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">BIGINT Data
Types</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945"></td>
<td align="center" valign="top" headers="wq1946"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">ROWID Data
Types</td>
<td align="center" valign="top" headers="wq1944"><sup class="fn"><a href="rbafzmstdiftab2.htm#dif402">100</a></sup></td>
<td align="center" valign="top" headers="wq1945"><sup class="fn"><a href="rbafzmstdiftab2.htm#dif402">100</a></sup></td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">DATALINK Data
Types</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">BINARY and
VARBINARY Data Types</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">Host declarations not documented
in language specific appendices</td>
<td align="center" valign="top" headers="wq1944"><sup class="fn"><a href="rbafzmstdiftab2.htm#dif101">99</a></sup></td>
<td align="center" valign="top" headers="wq1945"><sup class="fn"><a href="rbafzmstdiftab2.htm#dif101">99</a></sup></td>
<td align="center" valign="top" headers="wq1946"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">PREPARE with USING clause</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">ROLLBACK HOLD</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">SET CURRENT PACKAGESET</td>
<td align="center" valign="top" headers="wq1944"></td>
<td align="center" valign="top" headers="wq1945"></td>
<td align="center" valign="top" headers="wq1946"></td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">SET variable</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">SET TRANSACTION</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">Scrollable Cursor statements</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945">R</td>
<td align="center" valign="top" headers="wq1946">R</td>
</tr>
<tr>
<td align="left" valign="top" headers="wq1943">UPDATE cursor - FOR UPDATE clause not specified</td>
<td align="center" valign="top" headers="wq1944">R</td>
<td align="center" valign="top" headers="wq1945"></td>
<td align="center" valign="top" headers="wq1946"></td>
</tr>
</tbody>
</table><a id="idx3406" name="idx3406"></a><a id="idx3407" name="idx3407"></a>
<a name="rcncdif"></a>
<h3 id="rcncdif"><a href="rbafzmst02.htm#ToC_1490">CONNECT (Type 1) and CONNECT (Type 2) differences</a></h3><a id="idx3408" name="idx3408"></a><a id="idx3409" name="idx3409"></a><a id="idx3410" name="idx3410"></a>
<p>There are two types of CONNECT statements. They have the same syntax, but
they have different semantics: </p>
<ul>
<li>CONNECT (Type 1) is used for remote unit of work. See <a href="rbafzmstch2drda.htm#cmrwj">Remote unit of work</a>.</li>
<li>CONNECT (Type 2) is used for distributed unit of work. See <a href="rbafzmstcon2t.htm#con2t">CONNECT (Type 2)</a>.</li></ul>
<p>The following table summarizes the differences between CONNECT (Type 1)
and CONNECT (Type 2) rules:</p>
<a name="rcnitbl"></a>
<table id="rcnitbl" width="100%" summary="" border="0" frame="void" rules="rows">
<caption>Table 87. CONNECT (Type 1) and CONNECT (Type 2) Differences</caption>
<thead valign="bottom">
<tr>
<th id="wq1947" width="50%" align="left">Type 1 Rules</th>
<th id="wq1948" width="50%" align="left">Type 2 Rules</th>
</tr>
</thead>
<tbody valign="top">
<tr>
<td headers="wq1947">CONNECT statements can only be executed when the activation group is
in the connectable state. No more than one CONNECT statement can be executed
within the same unit of work.</td>
<td headers="wq1948">There are no rules about the connectable state. More than one CONNECT
statement can be executed within the same unit of work.</td>
</tr>
<tr>
<td headers="wq1947">If the CONNECT statement fails because the server name is not listed
in the local directory, the connection state of the activation group is unchanged.
<p>If a CONNECT statement fails because the activation group is not in the connectable
state, the SQL connection status of the activation group is unchanged.</p>
<p>If a CONNECT statement fails for any other reason, the activation group is
placed in the unconnected state.</p></td>
<td headers="wq1948">If a CONNECT statement fails, the current SQL connection is unchanged
and any subsequent SQL statements are executed by the current server.</td>
</tr>
<tr>
<td headers="wq1947">CONNECT ends all existing connections of the activation group. Accordingly,
CONNECT also closes any open cursors for that activation group.</td>
<td headers="wq1948">CONNECT does not end connections and does not close cursors.</td>
</tr>
<tr>
<td headers="wq1947">A CONNECT to the current server will succeed if the application group
is the connectable state.</td>
<td headers="wq1948">A CONNECT to an existing SQL connection of the activation group is
an error. Thus, a CONNECT to the current server is an error.</td>
</tr>
</tbody>
</table>
<a name="wq1949"></a>
<h4 id="wq1949">Determining the CONNECT rules that apply</h4>
<p>A program preparation option is used to specify the type of CONNECT that
will be performed by a program. The program preparation option is specified
using the RDBCNNMTH parameter on the CRTSQLxxx command.</p>
<a name="wq1950"></a>
<h4 id="wq1950">Connecting to servers that only support remote unit of work</h4>
<p>CONNECT (Type 2) connections to application servers that only support remote unit
of work might result in connections that are read-only.</p>
<p>If a CONNECT
(Type 2) is performed to an application server that only supports remote unit of work<sup class="fn"><a href="rbafzmstdiftab2.htm#fn002">101</a></sup>: </p>
<ul>
<li>The connection allows read-only operations if, at the time of the connect,
there are any dormant connections that allow updates. In this case, the connection
does not allow updates.</li>
<li>Otherwise, the connection allows updates.</li></ul>
<p>If a CONNECT (Type 2) is performed to an application server that supports distributed
unit of work: </p>
<ul>
<li>The connection allows read-only operations when there are dormant connections
that allow updates to application servers that only support remote unit of work.
In this case, the connection allows updates as soon as the dormant connection
is ended.</li>
<li>Otherwise, the connection allows updates.</li></ul>
<hr /><div class="fnnum"><a id="dif102" name="dif102">98</a>.</div>
<div class="fntext">The DB2 UDB for z/OS Application Server application requester will
process a BIGINT data type at the application server using the compatible
DECIMAL(19,0) data type.</div><div class="fnnum"><a id="dif101" name="dif101">99</a>.</div>
<div class="fntext">The statement is supported if the application requester understands
it.</div><div class="fnnum"><a id="dif402" name="dif402">100</a>.</div>
<div class="fntext">The DB2 UDB LUW application requester will process a ROWID data
type at the application server using the compatible VARCHAR(40) FOR BIT DATA
data type.</div><div class="fnnum"><a id="fn002" name="fn002">101</a>.</div>
<div class="fntext">DB2 UDB for iSeries using the initial DRDA&reg; support for native TCP/IP is an example
of an application server that supports only remote unit of work.</div>
<br />
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