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system/Database/Postgre/Builder.php
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313
system/Database/Postgre/Builder.php
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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\Postgre;
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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 Postgre
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*/
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class Builder extends BaseBuilder
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{
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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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'RANDOM()',
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];
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/**
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* Specifies which sql statements
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* support the ignore option.
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*
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* @var array
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*/
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protected $supportedIgnoreStatements = [
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'insert' => 'ON CONFLICT DO NOTHING',
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];
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/**
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* Checks if the ignore option is supported by
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* the Database Driver for the specific statement.
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*
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* @return string
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*/
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protected function compileIgnore(string $statement)
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{
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$sql = parent::compileIgnore($statement);
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if (! empty($sql)) {
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$sql = ' ' . trim($sql);
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}
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return $sql;
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}
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/**
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* ORDER BY
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*
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* @param string $direction ASC, DESC or RANDOM
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*
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* @return BaseBuilder
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*/
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public function orderBy(string $orderBy, string $direction = '', ?bool $escape = null)
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{
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$direction = strtoupper(trim($direction));
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if ($direction === 'RANDOM') {
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if (ctype_digit($orderBy)) {
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$orderBy = (float) ($orderBy > 1 ? "0.{$orderBy}" : $orderBy);
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}
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if (is_float($orderBy)) {
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$this->db->simpleQuery("SET SEED {$orderBy}");
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}
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$orderBy = $this->randomKeyword[0];
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$direction = '';
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$escape = false;
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}
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return parent::orderBy($orderBy, $direction, $escape);
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}
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/**
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* Increments a numeric column by the specified value.
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*
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* @throws DatabaseException
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*
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* @return mixed
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*/
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public function increment(string $column, int $value = 1)
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{
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$column = $this->db->protectIdentifiers($column);
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$sql = $this->_update($this->QBFrom[0], [$column => "to_number({$column}, '9999999') + {$value}"]);
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return $this->db->query($sql, $this->binds, false);
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}
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/**
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* Decrements a numeric column by the specified value.
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*
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* @throws DatabaseException
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*
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* @return mixed
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*/
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public function decrement(string $column, int $value = 1)
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{
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$column = $this->db->protectIdentifiers($column);
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$sql = $this->_update($this->QBFrom[0], [$column => "to_number({$column}, '9999999') - {$value}"]);
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return $this->db->query($sql, $this->binds, false);
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}
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/**
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* Compiles an replace into string and runs the query.
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* Because PostgreSQL doesn't support the replace into command,
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* we simply do a DELETE and an INSERT on the first key/value
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* combo, assuming that it's either the primary key or a unique key.
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*
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* @param array|null $set An associative array of insert values
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*
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* @throws DatabaseException
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*
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* @return mixed
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*/
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public function replace(?array $set = null)
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{
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if ($set !== null) {
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$this->set($set);
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}
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if (! $this->QBSet) {
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if (CI_DEBUG) {
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throw new DatabaseException('You must use the "set" method to update an entry.');
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}
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return false; // @codeCoverageIgnore
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}
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$table = $this->QBFrom[0];
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$set = $this->binds;
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array_walk($set, static function (array &$item) {
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$item = $item[0];
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});
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$key = array_key_first($set);
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$value = $set[$key];
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$builder = $this->db->table($table);
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$exists = $builder->where($key, $value, true)->get()->getFirstRow();
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if (empty($exists) && $this->testMode) {
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$result = $this->getCompiledInsert();
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} elseif (empty($exists)) {
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$result = $builder->insert($set);
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} elseif ($this->testMode) {
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$result = $this->where($key, $value, true)->getCompiledUpdate();
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} else {
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array_shift($set);
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$result = $builder->where($key, $value, true)->update($set);
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}
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unset($builder);
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$this->resetWrite();
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return $result;
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}
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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 _insert(string $table, array $keys, array $unescapedKeys): string
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{
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return trim(sprintf('INSERT INTO %s (%s) VALUES (%s) %s', $table, implode(', ', $keys), implode(', ', $unescapedKeys), $this->compileIgnore('insert')));
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}
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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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return trim(sprintf('INSERT INTO %s (%s) VALUES %s %s', $table, implode(', ', $keys), implode(', ', $values), $this->compileIgnore('insert')));
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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 $where
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*
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* @throws DatabaseException
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*
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* @return mixed
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*/
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public function delete($where = '', ?int $limit = null, bool $resetData = true)
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{
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if (! empty($limit) || ! empty($this->QBLimit)) {
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throw new DatabaseException('PostgreSQL does not allow LIMITs on DELETE queries.');
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}
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return parent::delete($where, $limit, $resetData);
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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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return $sql . ' LIMIT ' . $this->QBLimit . ($this->QBOffset ? " OFFSET {$this->QBOffset}" : '');
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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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* @throws DatabaseException
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*/
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protected function _update(string $table, array $values): string
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{
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if (! empty($this->QBLimit)) {
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throw new DatabaseException('Postgres does not support LIMITs with UPDATE queries.');
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}
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$this->QBOrderBy = [];
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return parent::_update($table, $values);
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}
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/**
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* Generates a platform-specific batch update string from the supplied data
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*/
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protected function _updateBatch(string $table, array $values, string $index): string
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{
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$ids = [];
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$final = [];
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foreach ($values as $val) {
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$ids[] = $val[$index];
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foreach (array_keys($val) as $field) {
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if ($field !== $index) {
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$final[$field] = $final[$field] ?? [];
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$final[$field][] = "WHEN {$val[$index]} THEN {$val[$field]}";
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}
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}
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}
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$cases = '';
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foreach ($final as $k => $v) {
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$cases .= "{$k} = (CASE {$index}\n"
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. implode("\n", $v)
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. "\nELSE {$k} END), ";
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}
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$this->where("{$index} IN(" . implode(',', $ids) . ')', null, false);
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return "UPDATE {$table} SET " . substr($cases, 0, -2) . $this->compileWhereHaving('QBWhere');
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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 $table): string
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{
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$this->QBLimit = false;
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return parent::_delete($table);
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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 . ' RESTART IDENTITY';
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}
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/**
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* Platform independent LIKE statement builder.
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*
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* In PostgreSQL, the ILIKE operator will perform case insensitive
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* searches according to the current locale.
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*
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* @see https://www.postgresql.org/docs/9.2/static/functions-matching.html
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*/
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protected function _like_statement(?string $prefix, string $column, ?string $not, string $bind, bool $insensitiveSearch = false): string
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{
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$op = $insensitiveSearch === true ? 'ILIKE' : 'LIKE';
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return "{$prefix} {$column} {$not} {$op} :{$bind}:";
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}
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/**
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* Generates the JOIN portion of the query
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*
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* @return BaseBuilder
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*/
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public function join(string $table, string $cond, string $type = '', ?bool $escape = null)
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{
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if (! in_array('FULL OUTER', $this->joinTypes, true)) {
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$this->joinTypes = array_merge($this->joinTypes, ['FULL OUTER']);
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}
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return parent::join($table, $cond, $type, $escape);
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}
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}
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