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Merge pull request #2487 from ytetsuro/add-oracle-driver
Feature Add Oracle driver
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| <?php | ||
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| /** | ||
| * This file is part of CodeIgniter 4 framework. | ||
| * | ||
| * (c) CodeIgniter Foundation <[email protected]> | ||
| * | ||
| * For the full copyright and license information, please view | ||
| * the LICENSE file that was distributed with this source code. | ||
| */ | ||
|
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| namespace CodeIgniter\Database\OCI8; | ||
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| use CodeIgniter\Database\BaseBuilder; | ||
| use CodeIgniter\Database\Exceptions\DatabaseException; | ||
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| /** | ||
| * Builder for OCI8 | ||
| */ | ||
| class Builder extends BaseBuilder | ||
| { | ||
| /** | ||
| * Identifier escape character | ||
| * | ||
| * @var string | ||
| */ | ||
| protected $escapeChar = '"'; | ||
|
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| /** | ||
| * ORDER BY random keyword | ||
| * | ||
| * @var array | ||
| */ | ||
| protected $randomKeyword = [ | ||
| '"DBMS_RANDOM"."RANDOM"', | ||
| ]; | ||
|
|
||
| /** | ||
| * COUNT string | ||
| * | ||
| * @used-by CI_DB_driver::count_all() | ||
| * @used-by BaseBuilder::count_all_results() | ||
| * | ||
| * @var string | ||
| */ | ||
| protected $countString = 'SELECT COUNT(1) '; | ||
|
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| /** | ||
| * Limit used flag | ||
| * | ||
| * If we use LIMIT, we'll add a field that will | ||
| * throw off num_fields later. | ||
| * | ||
| * @var bool | ||
| */ | ||
| protected $limitUsed = false; | ||
|
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| /** | ||
| * A reference to the database connection. | ||
| * | ||
| * @var Connection | ||
| */ | ||
| protected $db; | ||
|
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| /** | ||
| * Generates a platform-specific insert string from the supplied data. | ||
| */ | ||
| protected function _insertBatch(string $table, array $keys, array $values): string | ||
| { | ||
| $insertKeys = implode(', ', $keys); | ||
| $hasPrimaryKey = in_array('PRIMARY', array_column($this->db->getIndexData($table), 'type'), true); | ||
|
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| // ORA-00001 measures | ||
| if ($hasPrimaryKey) { | ||
| $sql = 'INSERT INTO ' . $table . ' (' . $insertKeys . ") \n SELECT * FROM (\n"; | ||
| $selectQueryValues = []; | ||
|
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| foreach ($values as $value) { | ||
| $selectValues = implode(',', array_map(static fn ($value, $key) => $value . ' as ' . $key, explode(',', substr(substr($value, 1), 0, -1)), $keys)); | ||
| $selectQueryValues[] = 'SELECT ' . $selectValues . ' FROM DUAL'; | ||
| } | ||
|
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| return $sql . implode("\n UNION ALL \n", $selectQueryValues) . "\n)"; | ||
| } | ||
|
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| $sql = "INSERT ALL\n"; | ||
|
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| foreach ($values as $value) { | ||
| $sql .= ' INTO ' . $table . ' (' . $insertKeys . ') VALUES ' . $value . "\n"; | ||
| } | ||
|
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| return $sql . 'SELECT * FROM DUAL'; | ||
| } | ||
|
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| /** | ||
| * Generates a platform-specific replace string from the supplied data | ||
| */ | ||
| protected function _replace(string $table, array $keys, array $values): string | ||
| { | ||
| $fieldNames = array_map(static fn ($columnName) => trim($columnName, '"'), $keys); | ||
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| $uniqueIndexes = array_filter($this->db->getIndexData($table), static function ($index) use ($fieldNames) { | ||
| $hasAllFields = count(array_intersect($index->fields, $fieldNames)) === count($index->fields); | ||
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| return ($index->type === 'PRIMARY') && $hasAllFields; | ||
| }); | ||
| $replaceableFields = array_filter($keys, static function ($columnName) use ($uniqueIndexes) { | ||
| foreach ($uniqueIndexes as $index) { | ||
| if (in_array(trim($columnName, '"'), $index->fields, true)) { | ||
| return false; | ||
| } | ||
| } | ||
|
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| return true; | ||
| }); | ||
|
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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 = []; | ||
| $onList[] = '1 != 1'; | ||
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| foreach ($uniqueIndexes as $index) { | ||
| $onList[] = '(' . implode(' AND ', array_map(static fn ($columnName) => $table . '."' . $columnName . '" = "_replace"."' . $columnName . '"', $index->fields)) . ')'; | ||
| } | ||
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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 '; | ||
| $sql .= ' (' . implode(', ', array_map(static fn ($columnName) => '"_replace".' . $columnName, $replaceableFields)) . ')'; | ||
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| return $sql; | ||
| } | ||
|
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| /** | ||
| * Generates a platform-specific truncate string from the supplied data | ||
| * | ||
| * If the database does not support the truncate() command, | ||
| * then this method maps to 'DELETE FROM table' | ||
| */ | ||
| protected function _truncate(string $table): string | ||
| { | ||
| return 'TRUNCATE TABLE ' . $table; | ||
| } | ||
|
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| /** | ||
| * Compiles a delete string and runs the query | ||
| * | ||
| * @param mixed $where | ||
| * | ||
| * @throws DatabaseException | ||
| * | ||
| * @return mixed | ||
| */ | ||
| public function delete($where = '', ?int $limit = null, bool $resetData = true) | ||
| { | ||
| if (! empty($limit)) { | ||
| $this->QBLimit = $limit; | ||
| } | ||
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| return parent::delete($where, null, $resetData); | ||
| } | ||
|
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| /** | ||
| * Generates a platform-specific delete string from the supplied data | ||
| */ | ||
| protected function _delete(string $table): string | ||
| { | ||
| if ($this->QBLimit) { | ||
| $this->where('rownum <= ', $this->QBLimit, false); | ||
| $this->QBLimit = false; | ||
| } | ||
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| return parent::_delete($table); | ||
| } | ||
|
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| /** | ||
| * Generates a platform-specific update string from the supplied data | ||
| */ | ||
| protected function _update(string $table, array $values): string | ||
| { | ||
| $valStr = []; | ||
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| foreach ($values as $key => $val) { | ||
| $valStr[] = $key . ' = ' . $val; | ||
| } | ||
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| if ($this->QBLimit) { | ||
| $this->where('rownum <= ', $this->QBLimit, false); | ||
| } | ||
|
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| return 'UPDATE ' . $this->compileIgnore('update') . $table . ' SET ' . implode(', ', $valStr) | ||
| . $this->compileWhereHaving('QBWhere') | ||
| . $this->compileOrderBy(); | ||
| } | ||
|
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| /** | ||
| * Generates a platform-specific LIMIT clause. | ||
| */ | ||
| protected function _limit(string $sql, bool $offsetIgnore = false): string | ||
| { | ||
| $offset = (int) ($offsetIgnore === false ? $this->QBOffset : 0); | ||
| if (version_compare($this->db->getVersion(), '12.1', '>=')) { | ||
| // OFFSET-FETCH can be used only with the ORDER BY clause | ||
| if (empty($this->QBOrderBy)) { | ||
| $sql .= ' ORDER BY 1'; | ||
| } | ||
|
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| return $sql . ' OFFSET ' . $offset . ' ROWS FETCH NEXT ' . $this->QBLimit . ' ROWS ONLY'; | ||
| } | ||
|
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| $this->limitUsed = true; | ||
| $limitTemplateQuery = 'SELECT * FROM (SELECT INNER_QUERY.*, ROWNUM RNUM FROM (%s) INNER_QUERY WHERE ROWNUM < %d)' . ($offset ? ' WHERE RNUM >= %d' : ''); | ||
|
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| return sprintf($limitTemplateQuery, $sql, $offset + $this->QBLimit + 1, $offset); | ||
| } | ||
|
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| /** | ||
| * Resets the query builder values. Called by the get() function | ||
| */ | ||
| protected function resetSelect() | ||
| { | ||
| $this->limitUsed = false; | ||
| parent::resetSelect(); | ||
| } | ||
| } |
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