array ( 0 => 'index.php', 1 => 'PHP Manual', ), 'head' => array ( 0 => 'UTF-8', 1 => 'zh', ), 'this' => array ( 0 => 'function.oci-field-precision.php', 1 => 'oci_field_precision', ), 'up' => array ( 0 => 'ref.oci8.php', 1 => 'OCI8 函数', ), 'prev' => array ( 0 => 'function.oci-field-name.php', 1 => 'oci_field_name', ), 'next' => array ( 0 => 'function.oci-field-scale.php', 1 => 'oci_field_scale', ), 'alternatives' => array ( ), 'source' => array ( 'lang' => 'zh', 'path' => 'reference/oci8/functions/oci-field-precision.xml', ), ); $setup["toc"] = $TOC; $setup["toc_deprecated"] = $TOC_DEPRECATED; $setup["parents"] = $PARENTS; manual_setup($setup); ?>
(PHP 5, PHP 7, PHP 8, PECL OCI8 >= 1.1.0)
oci_field_precision — 返回字段精度
返回 column
的精度。
对于 FLOAT 字段,精度不为零且小数位数为 -127。如果精度为 0,则字段为 NUMBER。其它类型为 NUMBER(precision, scale)。
statement
有效的 OCI 语句标识符。
column
字段索引(从 1 开始)或者名称。
返回整数形式的精度, 或者在失败时返回 false
示例 #1 oci_field_precision() 示例
<?php
// 创建表:
// 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, $i) . "<br>\n";
}
// 输出:
// C1 0 -127
// C2 126 -127
// C3 4 0
// C4 5 3
oci_free_statement($stid);
oci_close($conn);
?>