function.db2-foreign-keys.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd"><html> <head> <title>Returns a result set listing the foreign keys for a table</title> <meta http-equiv="content-type" content="text/html; charset=UTF-8"> </head> <body><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.db2-field-width.html">db2_field_width</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.db2-free-result.html">db2_free_result</a></div> <div class="up"><a href="ref.ibm-db2.html">IBM DB2 Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div><hr /><div id="function.db2-foreign-keys" class="refentry"> <div class="refnamediv"> <h1 class="refname">db2_foreign_keys</h1> <p class="verinfo">(PECL ibm_db2:1.0-1.6.2)</p><p class="refpurpose"><span class="refname">db2_foreign_keys</span> — <span class="dc-title"> Returns a result set listing the foreign keys for a table </span></p> </div> <div class="refsect1 description"> <h3 class="title">Description</h3> <div class="methodsynopsis dc-description"> <span class="type">resource</span> <span class="methodname"><b><b>db2_foreign_keys</b></b></span> ( <span class="methodparam"><span class="type">resource</span> <tt class="parameter">$connection</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$qualifier</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$schema</tt></span> , <span class="methodparam"><span class="type">string</span> <tt class="parameter">$table-name</tt></span> )</div> <p class="para rdfs-comment"> Returns a result set listing the foreign keys for a table. </p> </div> <div class="refsect1 parameters"> <h3 class="title">Parameters</h3> <p class="para"> <dl> <dt> <span class="term"><i><tt class="parameter">connection</tt></i></span> <dd> <p class="para"> A valid connection to an IBM DB2, Cloudscape, or Apache Derby database. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">qualifier</tt></i></span> <dd> <p class="para"> A qualifier for DB2 databases running on OS/390 or z/OS servers. For other databases, pass <b><tt>NULL</tt></b> or an empty string. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">schema</tt></i></span> <dd> <p class="para"> The schema which contains the tables. If <i><tt class="parameter">schema</tt></i> is <b><tt>NULL</tt></b>, <b>db2_foreign_keys()</b> matches the schema for the current connection. </p> </dd> </dt> <dt> <span class="term"><i><tt class="parameter">table-name</tt></i></span> <dd> <p class="para"> The name of the table. </p> </dd> </dt> </dl> </p> </div> <div class="refsect1 returnvalues"> <h3 class="title">Return Values</h3> <p class="para"> Returns a statement resource with a result set containing rows describing the foreign keys for the specified table. The result set is composed of the following columns: <table class="informaltable"> <colgroup> <thead valign="middle"> <tr valign="middle"> <th colspan="1">Column name</th> <th colspan="1">Description</th> </tr> </thead> <tbody valign="middle" class="tbody"> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">PKTABLE_CAT</td> <td colspan="1" rowspan="1" align="left"> Name of the catalog for the table containing the primary key. The value is NULL if this table does not have catalogs. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">PKTABLE_SCHEM</td> <td colspan="1" rowspan="1" align="left"> Name of the schema for the table containing the primary key. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">PKTABLE_NAME</td> <td colspan="1" rowspan="1" align="left">Name of the table containing the primary key.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">PKCOLUMN_NAME</td> <td colspan="1" rowspan="1" align="left">Name of the column containing the primary key.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">FKTABLE_CAT</td> <td colspan="1" rowspan="1" align="left"> Name of the catalog for the table containing the foreign key. The value is NULL if this table does not have catalogs. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">FKTABLE_SCHEM</td> <td colspan="1" rowspan="1" align="left"> Name of the schema for the table containing the foreign key. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">FKTABLE_NAME</td> <td colspan="1" rowspan="1" align="left">Name of the table containing the foreign key.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">FKCOLUMN_NAME</td> <td colspan="1" rowspan="1" align="left">Name of the column containing the foreign key.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">KEY_SEQ</td> <td colspan="1" rowspan="1" align="left">1-indexed position of the column in the key.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">UPDATE_RULE</td> <td colspan="1" rowspan="1" align="left"> Integer value representing the action applied to the foreign key when the SQL operation is UPDATE. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DELETE_RULE</td> <td colspan="1" rowspan="1" align="left"> Integer value representing the action applied to the foreign key when the SQL operation is DELETE. </td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">FK_NAME</td> <td colspan="1" rowspan="1" align="left">The name of the foreign key.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">PK_NAME</td> <td colspan="1" rowspan="1" align="left">The name of the primary key.</td> </tr> <tr valign="middle"> <td colspan="1" rowspan="1" align="left">DEFERRABILITY</td> <td colspan="1" rowspan="1" align="left"> An integer value representing whether the foreign key deferrability is SQL_INITIALLY_DEFERRED, SQL_INITIALLY_IMMEDIATE, or SQL_NOT_DEFERRABLE. </td> </tr> </tbody> </colgroup> </table> </p> </div> <div class="refsect1 seealso"> <h3 class="title">See Also</h3> <p class="para"> <ul class="simplelist"> <li class="member"><a href="function.db2-column-privileges.html" class="function" rel="rdfs-seeAlso">db2_column_privileges()</a></li> <li class="member"><a href="function.db2-columns.html" class="function" rel="rdfs-seeAlso">db2_columns()</a></li> <li class="member"><a href="function.db2-primary-keys.html" class="function" rel="rdfs-seeAlso">db2_primary_keys()</a></li> <li class="member"><a href="function.db2-procedure-columns.html" class="function" rel="rdfs-seeAlso">db2_procedure_columns()</a></li> <li class="member"><a href="function.db2-procedures.html" class="function" rel="rdfs-seeAlso">db2_procedures()</a></li> <li class="member"><a href="function.db2-special-columns.html" class="function" rel="rdfs-seeAlso">db2_special_columns()</a></li> <li class="member"><a href="function.db2-statistics.html" class="function" rel="rdfs-seeAlso">db2_statistics()</a></li> <li class="member"><a href="function.db2-table-privileges.html" class="function" rel="rdfs-seeAlso">db2_table_privileges()</a></li> <li class="member"><a href="function.db2-tables.html" class="function" rel="rdfs-seeAlso">db2_tables()</a></li> </ul> </p> </div></div><hr /><div style="text-align: center;"> <div class="prev" style="text-align: left; float: left;"><a href="function.db2-field-width.html">db2_field_width</a></div> <div class="next" style="text-align: right; float: right;"><a href="function.db2-free-result.html">db2_free_result</a></div> <div class="up"><a href="ref.ibm-db2.html">IBM DB2 Functions</a></div> <div class="home"><a href="index.html">PHP Manual</a></div></div></body></html>⌨️ 快捷键说明
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