<?php
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// +----------------------------------------------------------------------
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// | ThinkPHP [ WE CAN DO IT JUST THINK ]
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// +----------------------------------------------------------------------
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// | Licensed ( http://www.apache.org/licenses/LICENSE-2.0 )
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// +----------------------------------------------------------------------
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// | Author: liu21st <liu21st@gmail.com>
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// +----------------------------------------------------------------------
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namespace think\db\connector;
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use PDO;
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use think\db\BaseQuery;
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use think\db\PDOConnection;
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/**
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* Oracle数据库驱动.
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*/
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class Oracle extends PDOConnection
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{
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/**
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* 解析pdo连接的dsn信息.
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*
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* @param array $config 连接信息
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*
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* @return string
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*/
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protected function parseDsn(array $config): string
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{
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$dsn = 'oci:dbname=';
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if (!empty($config['hostname'])) {
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// Oracle Instant Client
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$dsn .= '//' . $config['hostname'] . ($config['hostport'] ? ':' . $config['hostport'] : '') . '/';
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}
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$dsn .= $config['database'];
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if (!empty($config['charset'])) {
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$dsn .= ';charset=' . $config['charset'];
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}
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return $dsn;
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}
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/**
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* 取得数据表的字段信息.
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*
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* @param string $tableName
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*
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* @return array
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*/
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public function getFields(string $tableName): array
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{
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[$tableName] = explode(' ', $tableName);
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$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 = '" . $tableName . "' ) b where table_name = '" . $tableName . "' and a.column_name = b.column_name (+)";
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$pdo = $this->getPDOStatement($sql);
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$result = $pdo->fetchAll(PDO::FETCH_ASSOC);
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$info = [];
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if ($result) {
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foreach ($result as $key => $val) {
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$val = array_change_key_case($val);
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$info[$val['column_name']] = [
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'name' => $val['column_name'],
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'type' => $val['data_type'],
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'notnull' => $val['notnull'],
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'default' => $val['data_default'],
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'primary' => $val['pk'],
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'autoinc' => $val['pk'],
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];
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}
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}
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return $this->fieldCase($info);
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}
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/**
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* 取得数据库的表信息（暂时实现取得用户表信息）.
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*
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* @param string $dbName
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*
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* @return array
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*/
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public function getTables(string $dbName = ''): array
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{
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$sql = 'select table_name from all_tables';
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$pdo = $this->getPDOStatement($sql);
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$result = $pdo->fetchAll(PDO::FETCH_ASSOC);
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$info = [];
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foreach ($result as $key => $val) {
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$info[$key] = current($val);
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}
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return $info;
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}
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/**
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* 获取最近插入的ID.
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*
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* @param BaseQuery $query 查询对象
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* @param string|null $sequence 自增序列名
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*
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* @return mixed
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*/
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public function getLastInsID(BaseQuery $query, ?string $sequence = null)
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{
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if (!is_null($sequence)) {
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$pdo = $this->linkID->query("select {$sequence}.currval as id from dual");
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$result = $pdo->fetchColumn();
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}
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return $result ?? null;
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}
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protected function supportSavepoint(): bool
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{
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return true;
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}
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}
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