pg-field-table.xml

<?xml version="1.0" encoding="utf-8"?>
<!-- $Revision$ -->
<refentry xml:id="function.pg-field-table" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>pg_field_table</refname> 
  <refpurpose>Returns the name or oid of the tables field</refpurpose>
 </refnamediv>

 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type class="union"><type>string</type><type>int</type><type>false</type></type><methodname>pg_field_table</methodname>
   <methodparam><type>PgSql\Result</type><parameter>result</parameter></methodparam>
   <methodparam><type>int</type><parameter>field</parameter></methodparam>
   <methodparam choice="opt"><type>bool</type><parameter>oid_only</parameter><initializer>&false;</initializer></methodparam>
  </methodsynopsis>
  <para>
   <function>pg_field_table</function> returns the name of the table that field 
   belongs to, or the table's oid if <parameter>oid_only</parameter> is &true;.
  </para>
 </refsect1>
 
 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>result</parameter></term>
     <listitem>
      &pgsql.parameter.result;
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>field</parameter></term>
      <listitem>
       <para>
        Field number, starting from 0.
       </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>oid_only</parameter></term>
      <listitem>
       <para>
        By default the tables name that field belongs to is returned but
        if <parameter>oid_only</parameter> is set to &true;, then the
        oid will instead be returned.
       </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   On success either the fields table name or oid, &return.falseforfailure;.
  </para>
 </refsect1>

 <refsect1 role="changelog">
  &reftitle.changelog;
  <informaltable>
   <tgroup cols="2">
    <thead>
     <row>
      <entry>&Version;</entry>
      <entry>&Description;</entry>
     </row>
    </thead>
    <tbody>
     &pgsql.changelog.result-object;
    </tbody>
   </tgroup>
  </informaltable>
 </refsect1>
 
 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title>Getting table information about a field</title>
    <programlisting role="php">
<![CDATA[
<?php
$dbconn = pg_connect("dbname=publisher") or die("Could not connect");

$res = pg_query($dbconn, "SELECT bar FROM foo");

echo pg_field_table($res, 0);
echo pg_field_table($res, 0, true);

$res = pg_query($dbconn, "SELECT version()");
var_dump(pg_field_table($res, 0));
?>
]]>
    </programlisting>
    &example.outputs.similar;
    <screen>
<![CDATA[
foo
14379580

bool(false)
]]>
    </screen>
   </example> 
  </para>
 </refsect1>

 <refsect1 role="notes">
  &reftitle.notes;
  <note>
   <para>
    Returning the oid is much faster than returning the table name because
    fetching the table name requires a query to the database system table.
   </para>
  </note>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>pg_field_name</function></member>
    <member><function>pg_field_type</function></member>
   </simplelist>
  </para>
 </refsect1>
</refentry>
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