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DESKTOP-DH6BVPV\chiefsoft
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<?php
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/**
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* This file is part of CodeIgniter 4 framework.
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*
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* (c) CodeIgniter Foundation <admin@codeigniter.com>
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*
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* For the full copyright and license information, please view
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* the LICENSE file that was distributed with this source code.
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*/
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namespace CodeIgniter\Database\OCI8;
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use CodeIgniter\Database\BaseBuilder;
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use CodeIgniter\Database\Exceptions\DatabaseException;
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/**
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* Builder for OCI8
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*/
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class Builder extends BaseBuilder
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{
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/**
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* Identifier escape character
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*
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* @var string
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*/
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protected $escapeChar = '"';
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/**
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* ORDER BY random keyword
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*
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* @var array
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*/
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protected $randomKeyword = [
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'"DBMS_RANDOM"."RANDOM"',
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];
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/**
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* COUNT string
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*
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* @used-by CI_DB_driver::count_all()
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* @used-by BaseBuilder::count_all_results()
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*
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* @var string
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*/
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protected $countString = 'SELECT COUNT(1) ';
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/**
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* Limit used flag
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*
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* If we use LIMIT, we'll add a field that will
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* throw off num_fields later.
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*
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* @var bool
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*/
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protected $limitUsed = false;
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/**
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* A reference to the database connection.
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*
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* @var Connection
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*/
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protected $db;
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/**
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* Generates a platform-specific insert string from the supplied data.
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*/
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protected function _insertBatch(string $table, array $keys, array $values): string
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{
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$insertKeys = implode(', ', $keys);
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$hasPrimaryKey = in_array('PRIMARY', array_column($this->db->getIndexData($table), 'type'), true);
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// ORA-00001 measures
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if ($hasPrimaryKey) {
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$sql = 'INSERT INTO ' . $table . ' (' . $insertKeys . ") \n SELECT * FROM (\n";
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$selectQueryValues = [];
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foreach ($values as $value) {
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$selectValues = implode(',', array_map(static fn ($value, $key) => $value . ' as ' . $key, explode(',', substr(substr($value, 1), 0, -1)), $keys));
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$selectQueryValues[] = 'SELECT ' . $selectValues . ' FROM DUAL';
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}
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return $sql . implode("\n UNION ALL \n", $selectQueryValues) . "\n)";
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}
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$sql = "INSERT ALL\n";
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foreach ($values as $value) {
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$sql .= ' INTO ' . $table . ' (' . $insertKeys . ') VALUES ' . $value . "\n";
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}
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return $sql . 'SELECT * FROM DUAL';
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}
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/**
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* Generates a platform-specific replace string from the supplied data
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*/
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protected function _replace(string $table, array $keys, array $values): string
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{
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$fieldNames = array_map(static fn ($columnName) => trim($columnName, '"'), $keys);
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$uniqueIndexes = array_filter($this->db->getIndexData($table), static function ($index) use ($fieldNames) {
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$hasAllFields = count(array_intersect($index->fields, $fieldNames)) === count($index->fields);
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return ($index->type === 'PRIMARY') && $hasAllFields;
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});
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$replaceableFields = array_filter($keys, static function ($columnName) use ($uniqueIndexes) {
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foreach ($uniqueIndexes as $index) {
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if (in_array(trim($columnName, '"'), $index->fields, true)) {
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return false;
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}
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}
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return true;
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});
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$sql = 'MERGE INTO ' . $table . "\n USING (SELECT ";
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$sql .= implode(', ', array_map(static fn ($columnName, $value) => $value . ' ' . $columnName, $keys, $values));
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$sql .= ' FROM DUAL) "_replace" ON ( ';
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$onList = [];
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$onList[] = '1 != 1';
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foreach ($uniqueIndexes as $index) {
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$onList[] = '(' . implode(' AND ', array_map(static fn ($columnName) => $table . '."' . $columnName . '" = "_replace"."' . $columnName . '"', $index->fields)) . ')';
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}
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$sql .= implode(' OR ', $onList) . ') WHEN MATCHED THEN UPDATE SET ';
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$sql .= implode(', ', array_map(static fn ($columnName) => $columnName . ' = "_replace".' . $columnName, $replaceableFields));
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$sql .= ' WHEN NOT MATCHED THEN INSERT (' . implode(', ', $replaceableFields) . ') VALUES ';
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return $sql . (' (' . implode(', ', array_map(static fn ($columnName) => '"_replace".' . $columnName, $replaceableFields)) . ')');
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}
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/**
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* Generates a platform-specific truncate string from the supplied data
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*
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* If the database does not support the truncate() command,
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* then this method maps to 'DELETE FROM table'
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*/
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protected function _truncate(string $table): string
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{
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return 'TRUNCATE TABLE ' . $table;
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}
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/**
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* Compiles a delete string and runs the query
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*
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* @param mixed $where
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*
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* @return mixed
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*
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* @throws DatabaseException
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*/
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public function delete($where = '', ?int $limit = null, bool $resetData = true)
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{
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if (! empty($limit)) {
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$this->QBLimit = $limit;
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}
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return parent::delete($where, null, $resetData);
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}
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/**
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* Generates a platform-specific delete string from the supplied data
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*/
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protected function _delete(string $table): string
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{
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if ($this->QBLimit) {
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$this->where('rownum <= ', $this->QBLimit, false);
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$this->QBLimit = false;
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}
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return parent::_delete($table);
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}
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/**
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* Generates a platform-specific update string from the supplied data
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*/
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protected function _update(string $table, array $values): string
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{
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$valStr = [];
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foreach ($values as $key => $val) {
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$valStr[] = $key . ' = ' . $val;
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}
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if ($this->QBLimit) {
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$this->where('rownum <= ', $this->QBLimit, false);
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}
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return 'UPDATE ' . $this->compileIgnore('update') . $table . ' SET ' . implode(', ', $valStr)
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. $this->compileWhereHaving('QBWhere')
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. $this->compileOrderBy();
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}
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/**
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* Generates a platform-specific LIMIT clause.
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*/
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protected function _limit(string $sql, bool $offsetIgnore = false): string
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{
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$offset = (int) ($offsetIgnore === false ? $this->QBOffset : 0);
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if (version_compare($this->db->getVersion(), '12.1', '>=')) {
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// OFFSET-FETCH can be used only with the ORDER BY clause
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if (empty($this->QBOrderBy)) {
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$sql .= ' ORDER BY 1';
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}
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return $sql . ' OFFSET ' . $offset . ' ROWS FETCH NEXT ' . $this->QBLimit . ' ROWS ONLY';
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}
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$this->limitUsed = true;
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$limitTemplateQuery = 'SELECT * FROM (SELECT INNER_QUERY.*, ROWNUM RNUM FROM (%s) INNER_QUERY WHERE ROWNUM < %d)' . ($offset ? ' WHERE RNUM >= %d' : '');
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return sprintf($limitTemplateQuery, $sql, $offset + $this->QBLimit + 1, $offset);
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}
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/**
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* Resets the query builder values. Called by the get() function
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*/
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protected function resetSelect()
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{
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$this->limitUsed = false;
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parent::resetSelect();
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}
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}
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