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<h1 class="topictitle1">SQLForeignKeys - Get the list of foreign key columns</h1>
<div><div class="section"><h4 class="sectiontitle">Purpose</h4> <p><samp class="codeph">SQLForeignKeys()</samp> returns
information about foreign keys for the specified table. The information is
returned in an SQL result set which can be processed using the same functions
that are used to retrieve a result that is generated by a query.</p>
</div>
<div class="section"><h4 class="sectiontitle">Syntax</h4><pre>SQLRETURN SQLForeignKeys (SQLHSTMT StatementHandle,
SQLCHAR *PKCatalogName,
SQLSMALLINT NameLength1,
SQLCHAR *PKSchemaName,
SQLSMALLINT NameLength2,
SQLCHAR *PKTableName,
SQLSMALLINT NameLength3,
SQLCHAR *FKCatalogName,
SQLSMALLINT NameLength4,
SQLCHAR *FKSchemaName,
SQLSMALLINT NameLength5,
SQLCHAR *FKTableName,
SQLSMALLINT NameLength6);</pre>
</div>
<div class="section"><h4 class="sectiontitle">Function arguments</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="hsides" border="1" rules="all"><caption>Table 1. SQLForeignKeys arguments</caption><thead align="left"><tr><th align="left" valign="bottom" width="17.59259259259259%" id="d0e47">Data type</th>
<th align="left" valign="bottom" width="23.51851851851852%" id="d0e49">Argument </th>
<th align="left" valign="bottom" width="11.851851851851853%" id="d0e51">Use </th>
<th align="left" valign="bottom" width="47.03703703703704%" id="d0e53">Description </th>
</tr>
</thead>
<tbody><tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLCHAR *</td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>FKCatalogName</em> </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Catalog qualifier of the table containing
the foreign key. This must be a NULL pointer or a zero length string.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLCHAR *</td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>FKSchemaName</em> </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Schema qualifier of the table containing
the foreign key.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLCHAR *</td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>FKTableName</em></td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Name of the table containing the foreign
key.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLCHAR *</td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>PKCatalogName</em> </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Catalog qualifier of the primary key table.
This must be a NULL pointer or a zero length string.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLCHAR *</td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>PKSchemaName</em> </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Schema qualifier of the primary key table.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLCHAR *</td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>PKTableName</em> </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Name of the table name containing the primary
key.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLHSTMT </td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>StatementHandle</em> </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Statement handle.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLSMALLINT </td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>NameLength2</em> </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Length of <span class="synph"><span class="var">PKSchemaName</span></span>.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLSMALLINT </td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 ">NameLength3 </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Length of <span class="synph"><span class="var">PKTableName</span></span>.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLSMALLINT </td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>NameLength6</em> </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Length of <span class="synph"><span class="var">FKTableName</span></span>.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLSMALLINT</td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>NameLength1</em> </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Length of <span class="synph"><span class="var">PKCatalogName</span></span>.
This must be set to 0.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLSMALLINT</td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>NameLength4</em> </td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Length of <span class="synph"><span class="var">FKCatalogName</span></span>.
This must be set to 0.</td>
</tr>
<tr><td align="left" valign="top" width="17.59259259259259%" headers="d0e47 ">SQLSMALLINT</td>
<td align="left" valign="top" width="23.51851851851852%" headers="d0e49 "><em>NameLength5 </em></td>
<td align="left" valign="top" width="11.851851851851853%" headers="d0e51 ">Input </td>
<td align="left" valign="top" width="47.03703703703704%" headers="d0e53 ">Length of <span class="synph"><span class="var">FKSchemaName</span></span>.</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section"><h4 class="sectiontitle">Usage</h4><p>If <span class="synph"><span class="var">PKTableName</span></span> contains
a table name, and <span class="synph"><span class="var">FKTableName</span></span> is an empty string, <samp class="codeph">SQLForeignKeys()</samp> returns
a result set that contains the primary key of the specified table and all
of the foreign keys (in other tables) that refer to it.</p>
<p>If <span class="synph"><span class="var">FKTableName</span></span> contains
a table name, and <span class="synph"><span class="var">PKTableName</span></span> is an empty string, <samp class="codeph">SQLForeignKeys()</samp>
returns a result set that contains all of the foreign keys in the specified
table and the primary keys (in other tables) to which they refer.</p>
<p>If
both <span class="synph"><span class="var">PKTableName</span></span> and <span class="synph"><span class="var">FKTableName</span></span> contain
table names, <samp class="codeph">SQLForeignKeys()</samp> returns the foreign keys in
the table specified in <span class="synph"><span class="var">FKTableName</span></span> that refer to
the primary key of the table specified in <span class="synph"><span class="var">PKTableName</span></span>.
This should be one key at the most.</p>
<p>If the schema qualifier argument
that is associated with a table name is not specified, then for the schema
name the default is the one currently in effect for the current connection.</p>
<p><a href="#rzadpfnfkey__tbfkey">Table 2</a> lists the columns of the result set generated
by the <samp class="codeph">SQLForeignKeys()</samp> call. If the foreign keys that are
associated with a primary key are requested, the result set is ordered by
FKTABLE_CAT, FKTABLE_SCHEM, FKTABLE_NAME, and ORDINAL_POSITION. If the primary
keys that are associated with a foreign key are requested, the result set
is ordered by PKTABLE_CAT, PKTABLE_SCHEM, PKTABLE_NAME, and ORDINAL_POSITION.</p>
<p>Although
new columns might be added and the names of the existing columns might be
changed in future releases, the position of the current columns does not change.</p>
<div class="tablenoborder"><a name="rzadpfnfkey__tbfkey"><!-- --></a><table cellpadding="4" cellspacing="0" summary="" id="rzadpfnfkey__tbfkey" width="100%" frame="hsides" border="1" rules="rows"><caption>Table 2. Columns returned by SQLForeignKeys</caption><thead align="left"><tr><th align="left" valign="bottom" width="22.407407407407405%" id="d0e291">Column number/name</th>
<th align="left" valign="bottom" width="16.11111111111111%" id="d0e293">Data type</th>
<th align="left" valign="bottom" width="58.14814814814815%" id="d0e295">Description</th>
<th valign="top" width="3.3333333333333335%" id="d0e297">&nbsp;</th>
</tr>
</thead>
<tbody><tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">1 PKTABLE_CAT</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">VARCHAR(128) </td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">The current server.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">2 PKTABLE_SCHEM</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">VARCHAR(128) </td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">The name of the schema containing PKTABLE_NAME.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">3 PKTABLE_NAME</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">VARCHAR(128) not NULL</td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">Name of the table containing the primary
key.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">4 PKCOLUMN_NAME</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">VARCHAR(128) not NULL</td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">Primary key column name.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">5 FKTABLE_CAT</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">VARCHAR(128) </td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">The current server.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">6 FKTABLE_SCHEM</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">VARCHAR(128) </td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">The name of the schema containing FKTABLE_NAME.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">7 FKTABLE_NAME</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">VARCHAR(128) not NULL</td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">The name of the table containing the Foreign
key.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">8 FKCOLUMN_NAME</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">VARCHAR(128) not NULL</td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">Foreign key column name.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">9 ORDINAL_POSITION</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">SMALLINT not NULL</td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">The ordinal position of the column in the
key, starting at 1.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">10 UPDATE_RULE</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">SMALLINT </td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">Action to be applied to the foreign key when
the SQL operation is UPDATE: <ul><li>SQL_RESTRICT</li>
<li>SQL_NO_ACTION</li>
</ul>
<div class="p">The update rule for IBM<sup>®</sup> DB2<sup>®</sup> DBMSs is always either RESTRICT or SQL_NO_ACTION.
However, ODBC applications might encounter the following UPDATE_RULE values
when connected to non-IBM RDBMSs: <ul><li>SQL_CASCADE</li>
<li>SQL_SET_NULL</li>
</ul>
</div>
</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">11 DELETE_RULE</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">SMALLINT</td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">Action to be applied to the foreign key when
the SQL operation is DELETE: <ul><li>SQL_CASCADE</li>
<li>SQL_NO_ACTION</li>
<li>SQL_RESTRICT</li>
<li>SQL_SET_DEFAULT</li>
<li>SQL_SET_NULL</li>
</ul>
</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">12 FK_NAME</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">VARCHAR(128) </td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">Foreign key identifier. NULL if not applicable
to the data source.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="22.407407407407405%" headers="d0e291 ">13 PK_NAME</td>
<td align="left" valign="top" width="16.11111111111111%" headers="d0e293 ">VARCHAR(128)</td>
<td align="left" valign="top" width="58.14814814814815%" headers="d0e295 ">Primary key identifier. NULL if not applicable
to the data source.</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
<tr><td colspan="3" align="left" valign="top" headers="d0e291 d0e293 d0e295 "> <div class="note"><span class="notetitle">Note:</span> The column
names used by DB2 UDB
CLI follow the X/Open CLI CAE specification style. The column types, contents
and order are identical to those defined for the <samp class="codeph">SQLForeignKeys()</samp> result
set in ODBC.</div>
</td>
<td valign="top" width="3.3333333333333335%" headers="d0e297 ">&nbsp;</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section"><h4 class="sectiontitle">Return codes</h4><div class="p"> <ul><li>SQL_SUCCESS</li>
<li>SQL_SUCCESS_WITH_INFO</li>
<li>SQL_STILL_EXECUTING</li>
<li>SQL_ERROR</li>
<li>SQL_INVALID_HANDLE</li>
</ul>
</div>
</div>
<div class="section"><h4 class="sectiontitle">Diagnostics</h4>
<div class="tablenoborder"><table cellpadding="4" cellspacing="0" summary="" width="100%" frame="hsides" border="1" rules="rows"><caption>Table 3. SQLForeignKeys SQLSTATEs</caption><thead align="left"><tr><th align="left" valign="bottom" width="12.962962962962962%" id="d0e477">SQLSTATE </th>
<th align="left" valign="bottom" width="29.074074074074076%" id="d0e479">Description </th>
<th align="left" valign="bottom" width="57.96296296296296%" id="d0e481">Explanation </th>
</tr>
</thead>
<tbody><tr><td align="left" valign="top" width="12.962962962962962%" headers="d0e477 "><strong>24</strong>000 </td>
<td align="left" valign="top" width="29.074074074074076%" headers="d0e479 ">Cursor state that is not valid</td>
<td align="left" valign="top" width="57.96296296296296%" headers="d0e481 ">A cursor is already opened on the statement
handle.</td>
</tr>
<tr><td align="left" valign="top" width="12.962962962962962%" headers="d0e477 "><strong>40</strong>003 <strong>08</strong>S01</td>
<td align="left" valign="top" width="29.074074074074076%" headers="d0e479 ">Communication link failure</td>
<td align="left" valign="top" width="57.96296296296296%" headers="d0e481 ">The communication link between the application
and data source fails before the function is completed.</td>
</tr>
<tr><td align="left" valign="top" width="12.962962962962962%" headers="d0e477 "><strong>HY</strong>001</td>
<td align="left" valign="top" width="29.074074074074076%" headers="d0e479 ">Memory allocation failure</td>
<td align="left" valign="top" width="57.96296296296296%" headers="d0e481 ">DB2 UDB CLI is unable to allocate memory
required to support the processing or completion of the function.</td>
</tr>
<tr><td align="left" valign="top" width="12.962962962962962%" headers="d0e477 "><strong>HY</strong>009 </td>
<td align="left" valign="top" width="29.074074074074076%" headers="d0e479 ">Argument value that is not valid</td>
<td align="left" valign="top" width="57.96296296296296%" headers="d0e481 ">The arguments <span class="synph"><span class="var">PKTableName</span></span> and <span class="synph"><span class="var">FKTableName</span></span> were
both NULL pointers.</td>
</tr>
<tr><td align="left" valign="top" width="12.962962962962962%" headers="d0e477 "><strong>HY</strong>010 </td>
<td align="left" valign="top" width="29.074074074074076%" headers="d0e479 ">Function sequence error</td>
<td align="left" valign="top" width="57.96296296296296%" headers="d0e481 ">&nbsp;</td>
</tr>
<tr><td align="left" valign="top" width="12.962962962962962%" headers="d0e477 "><strong>HY</strong>014 </td>
<td align="left" valign="top" width="29.074074074074076%" headers="d0e479 ">No more handles </td>
<td align="left" valign="top" width="57.96296296296296%" headers="d0e481 ">DB2 UDB CLI is unable to allocate a handle
due to internal resources.</td>
</tr>
<tr><td valign="top" width="12.962962962962962%" headers="d0e477 "><strong>HY</strong>021</td>
<td valign="top" width="29.074074074074076%" headers="d0e479 ">Internal descriptor that is not valid </td>
<td valign="top" width="57.96296296296296%" headers="d0e481 ">The internal descriptor cannot be addressed or allocated,
or it contains a value that is not valid.</td>
</tr>
<tr><td align="left" valign="top" width="12.962962962962962%" headers="d0e477 "><strong>HY</strong>090 </td>
<td align="left" valign="top" width="29.074074074074076%" headers="d0e479 ">String or buffer length that is not valid</td>
<td align="left" valign="top" width="57.96296296296296%" headers="d0e481 ">The value of one of the name length arguments
is less than 0, but not equal to SQL_NTS. <p>The length of the table or owner
name is greater than the maximum length supported by the server. Refer to
<a href="rzadpfnginfo.htm#rzadpfnginfo">SQLGetInfo - Get general information</a>.</p>
</td>
</tr>
<tr><td align="left" valign="top" width="12.962962962962962%" headers="d0e477 "><strong>HY</strong>C00 </td>
<td align="left" valign="top" width="29.074074074074076%" headers="d0e479 ">Driver not capable</td>
<td align="left" valign="top" width="57.96296296296296%" headers="d0e481 ">DB2 UDB CLI does not support <span class="synph"><span class="var">catalog</span></span> as
a qualifier for table name.</td>
</tr>
<tr><td align="left" valign="top" width="12.962962962962962%" headers="d0e477 "><strong>HY</strong>T00 </td>
<td align="left" valign="top" width="29.074074074074076%" headers="d0e479 ">Timeout expired</td>
<td align="left" valign="top" width="57.96296296296296%" headers="d0e481 ">&nbsp;</td>
</tr>
</tbody>
</table>
</div>
</div>
<div class="section"><h4 class="sectiontitle">Restrictions</h4><p>None.</p>
</div>
<div class="section"><h4 class="sectiontitle">Example</h4></div>
<div class="example" id="rzadpfnfkey__xmfkey"><a name="rzadpfnfkey__xmfkey"><!-- --></a><div class="p"><div class="note"><span class="notetitle">Note:</span> By using the code examples, you
agree to the terms of the <a href="codedisclaimer.htm">Code license and disclaimer information</a>.</div>
<pre>/* From CLI sample browser.c */
/* ... */
SQLRETURN list_foreign_keys( SQLHANDLE hstmt,
SQLCHAR * schema,
SQLCHAR * tablename
) {
/* ... */
rc = SQLForeignKeys(hstmt, NULL, 0,
schema, SQL_NTS, tablename, SQL_NTS,
NULL, 0,
NULL, SQL_NTS, NULL, SQL_NTS);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
rc = SQLBindCol(hstmt, 2, SQL_C_CHAR, (SQLPOINTER) pktable_schem.s, 129,
&amp;pktable_schem.ind);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
rc = SQLBindCol(hstmt, 3, SQL_C_CHAR, (SQLPOINTER) pktable_name.s, 129,
&amp;pktable_name.ind);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
rc = SQLBindCol(hstmt, 4, SQL_C_CHAR, (SQLPOINTER) pkcolumn_name.s, 129,
&amp;pkcolumn_name.ind);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
rc = SQLBindCol(hstmt, 6, SQL_C_CHAR, (SQLPOINTER) fktable_schem.s, 129,
&amp;fktable_schem.ind);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
rc = SQLBindCol(hstmt, 7, SQL_C_CHAR, (SQLPOINTER) fktable_name.s, 129,
&amp;fktable_name.ind);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
rc = SQLBindCol(hstmt, 8, SQL_C_CHAR, (SQLPOINTER) fkcolumn_name.s, 129,
&amp;fkcolumn_name.ind);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
rc = SQLBindCol(hstmt, 10, SQL_C_SHORT, (SQLPOINTER) &amp;update_rule,
0, &amp;update_ind);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
rc = SQLBindCol(hstmt, 11, SQL_C_SHORT, (SQLPOINTER) &amp;delete_rule,
0, &amp;delete_ind);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
rc = SQLBindCol(hstmt, 12, SQL_C_CHAR, (SQLPOINTER) fkey_name.s, 129,
&amp;fkey_name.ind);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
rc = SQLBindCol(hstmt, 13, SQL_C_CHAR, (SQLPOINTER) pkey_name.s, 129,
&amp;pkey_name.ind);
CHECK_HANDLE( SQL_HANDLE_STMT, hstmt, rc ) ;
printf("Primary Key and Foreign Keys for %s.%s\n", schema, tablename);
/* Fetch each row, and display */
while ((rc = SQLFetch(hstmt)) == SQL_SUCCESS) {
printf(" %s %s.%s.%s\n Update Rule ",
pkcolumn_name.s, fktable_schem.s, fktable_name.s, fkcolumn_name.s);
if (update_rule == SQL_RESTRICT) {
printf("RESTRICT "); /* always for IBM DBMSs */
} else {
if (update_rule == SQL_CASCADE) {
printf("CASCADE "); /* non-IBM only */
} else {
printf("SET NULL ");
}
}
printf(", Delete Rule: ");
if (delete_rule== SQL_RESTRICT) {
printf("RESTRICT "); /* always for IBM DBMSs */
} else {
if (delete_rule == SQL_CASCADE) {
printf("CASCADE "); /* non-IBM only */
} else {
if (delete_rule == SQL_NO_ACTION) {
printf("NO ACTION "); /* non-IBM only */
} else {
printf("SET NULL ");
}
}
}
printf("\n");
if (pkey_name.ind &gt; 0 ) {
printf(" Primary Key Name: %s\n", pkey_name.s);
}
if (fkey_name.ind &gt; 0 ) {
printf(" Foreign Key Name: %s\n", fkey_name.s);
}
}</pre>
</div>
</div>
<div class="section"><h4 class="sectiontitle">References</h4><div class="p"> <ul><li><a href="rzadpfnpkey.htm#rzadpfnpkey">SQLPrimaryKeys - Get primary key columns of a table</a></li>
<li><a href="rzadpfnstats.htm#rzadpfnstats">SQLStatistics - Get index and statistics information for a base table</a></li>
</ul>
</div>
</div>
</div>
<div>
<div class="familylinks">
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzadphdapi.htm" title="This topic provides a description of each CLI function.">DB2 UDB CLI functions</a></div>
</div>
</div>
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