vendor/topthink/think-orm/src/db/connector/Oracle.php

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<?php
// +----------------------------------------------------------------------
// | ThinkPHP [ WE CAN DO IT JUST THINK ]
// +----------------------------------------------------------------------
// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
// +----------------------------------------------------------------------
// | Author: liu21st <liu21st@gmail.com>
// +----------------------------------------------------------------------

namespace think\db\connector;

use PDO;
use think\db\BaseQuery;
use think\db\PDOConnection;

/**
 * Oracle数据库驱动
 */
class Oracle extends PDOConnection
{
    /**
     * 解析pdo连接的dsn信息
     * @access protected
     * @param array $config 连接信息
     * @return string
     */
    protected function parseDsn(array $config): string
    {
        $dsn = 'oci:dbname=';

        if (!empty($config['hostname'])) {
            //  Oracle Instant Client
            $dsn .= '//' . $config['hostname'] . ($config['hostport'] ? ':' . $config['hostport'] : '') . '/';
        }

        $dsn .= $config['database'];

        if (!empty($config['charset'])) {
            $dsn .= ';charset=' . $config['charset'];
        }

        return $dsn;
    }

    /**
     * 取得数据表的字段信息
     * @access public
     * @param string $tableName
     * @return array
     */
    public function getFields(string $tableName): array
    {
        [$tableName] = explode(' ', $tableName);
        $sql         = "select a.column_name,data_type,DECODE (nullable, 'Y', 0, 1) notnull,data_default, DECODE (A .column_name,b.column_name,1,0) pk from all_tab_columns a,(select column_name from all_constraints c, all_cons_columns col where c.constraint_name = col.constraint_name and c.constraint_type = 'P' and c.table_name = '" . strtoupper($tableName) . "' ) b where table_name = '" . strtoupper($tableName) . "' and a.column_name = b.column_name (+)";

        $pdo    = $this->getPDOStatement($sql);
        $result = $pdo->fetchAll(PDO::FETCH_ASSOC);
        $info   = [];

        if ($result) {