73 lines
1.7 KiB
PHP
73 lines
1.7 KiB
PHP
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<?php
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namespace PicoDb;
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class Postgres extends \PDO {
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private $schema_table = 'schema_version';
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public function __construct(array $settings)
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{
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$required_atttributes = array(
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'hostname',
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'username',
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'password',
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'database',
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);
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foreach ($required_atttributes as $attribute) {
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if (! isset($settings[$attribute])) {
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throw new \LogicException('This configuration parameter is missing: "'.$attribute.'"');
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}
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}
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$dsn = 'pgsql:host='.$settings['hostname'].';dbname='.$settings['database'];
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parent::__construct($dsn, $settings['username'], $settings['password']);
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if (isset($settings['schema_table'])) {
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$this->schema_table = $settings['schema_table'];
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}
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}
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public function getSchemaVersion()
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{
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$this->exec("CREATE TABLE IF NOT EXISTS ".$this->schema_table." (version SMALLINT DEFAULT 0)");
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$rq = $this->prepare('SELECT version FROM '.$this->schema_table.'');
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$rq->execute();
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$result = $rq->fetch(\PDO::FETCH_ASSOC);
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if (isset($result['version'])) {
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return (int) $result['version'];
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}
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else {
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$this->exec('INSERT INTO '.$this->schema_table.' VALUES(0)');
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}
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return 0;
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}
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public function setSchemaVersion($version)
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{
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$rq = $this->prepare('UPDATE '.$this->schema_table.' SET version=?');
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$rq->execute(array($version));
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}
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public function getLastId()
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{
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$rq = $this->prepare('SELECT LASTVAL()');
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$rq->execute();
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return $rq->fetchColumn();
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}
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public function escapeIdentifier($value)
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{
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return $value;
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}
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}
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