php-doc-en/reference/oci8/functions/oci-field-precision.xml

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<refentry xml:id="function.oci-field-precision" xmlns="http://docbook.org/ns/docbook">
 <refnamediv>
  <refname>oci_field_precision</refname>
  <refpurpose>Tell the precision of a field</refpurpose>
 </refnamediv>
 
 <refsect1 role="description">
  &reftitle.description;
  <methodsynopsis>
   <type>int</type><methodname>oci_field_precision</methodname>
   <methodparam><type>resource</type><parameter>statement</parameter></methodparam>
   <methodparam><type>mixed</type><parameter>field</parameter></methodparam>
  </methodsynopsis>
  <para>
   Returns precision of the <parameter>field</parameter>.
  </para>
  <para>
   For FLOAT columns, precision is nonzero and scale is -127.
   If precision is 0, then column is NUMBER. Else it's
   NUMBER(precision, scale).
  </para>
 </refsect1>

 <refsect1 role="parameters">
  &reftitle.parameters;
  <para>
   <variablelist>
    <varlistentry>
     <term><parameter>statement</parameter></term>
     <listitem>
      <para>
       A valid OCI statement identifier.
      </para>
     </listitem>
    </varlistentry>
    <varlistentry>
     <term><parameter>field</parameter></term>
     <listitem>
      <para>
       Can be the field's index (1-based) or name.
      </para>
     </listitem>
    </varlistentry>
   </variablelist>
  </para>
 </refsect1>

 <refsect1 role="returnvalues">
  &reftitle.returnvalues;
  <para>
   Returns the precision as an integer, or &false; on errors.
  </para>
 </refsect1>

 <refsect1 role="examples">
  &reftitle.examples;
  <para>
   <example>
    <title><function>oci_field_precision</function> Example</title>
    <programlisting role="php">
<![CDATA[
<?php

// Create the table with:
//   CREATE TABLE mytab (c1 NUMBER, c2 FLOAT, c3 NUMBER(4), c4 NUMBER(5,3));

$conn = oci_connect("hr", "hrpwd", "localhost/XE");
if (!$conn) {
    $m = oci_error();
    trigger_error(htmlentities($m['message']), E_USER_ERROR);
}

$stid = oci_parse($conn, "SELECT * FROM mytab");
oci_execute($stid, OCI_DESCRIBE_ONLY); // Use OCI_DESCRIBE_ONLY if not fetching rows

$ncols = oci_num_fields($stid);
for ($i = 1; $i <= $ncols; $i++) {
    echo oci_field_name($stid, $i) . " " 
        . oci_field_precision($stid, $i) . " " 
        . oci_field_scale($stid, $i) . "<br>\n";
}

// Outputs:
//   C1    0 -127
//   C2  126 -127
//   C3    4    0
//   C4    5    3

oci_free_statement($stid);
oci_close($conn);

?>
]]>
    </programlisting>
   </example>
  </para>
 </refsect1>

 <refsect1 role="notes">
  &reftitle.notes;
  <note>
   <para>
    In PHP versions before 5.0.0 you must use <function>ocicolumnprecision</function> instead.
    This name still can be used, it was left as alias of
    <function>oci_field_precision</function> for downwards compatability.
    This, however, is deprecated and not recommended.
   </para>
  </note>
 </refsect1>

 <refsect1 role="seealso">
  &reftitle.seealso;
  <para>
   <simplelist>
    <member><function>oci_field_scale</function></member>
    <member><function>oci_field_type</function></member>
   </simplelist>
  </para>
 </refsect1>

</refentry>

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