propelorm/Propel2

src/Propel/Runtime/Adapter/MSSQL/MssqlPropelPDO.php
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<?php

/**
 * This file is part of the Propel package.
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 *
 * @license MIT License
 */

namespace Propel\Runtime\Adapter\MSSQL;

use Propel\Runtime\Connection\PropelPDO;
use Propel\Runtime\Exception\PropelException;

/**
 * dblib doesn't support transactions so we need to add a workaround for
 * transactions, last insert ID, and quoting
 *
 */
class MssqlPropelPDO extends PropelPDO
{
    /**
     * Begin a transaction.
     *
     * It is necessary to override the abstract PDO transaction functions here, as
     * the PDO driver for MSSQL does not support transactions.
     *
     * @return integer
     */
    public function beginTransaction()
    {
        $return = true;
        $opcount = $this->getNestedTransactionCount();
        if ($opcount === 0) {
            $return = self::exec('BEGIN TRANSACTION');
            if ($this->useDebug) {
                $this->log('Begin transaction', null, __METHOD__);
            }
            $this->isUncommitable = false;
        }
        $this->nestedTransactionCount++;

        return $return;
    }

    /**
     * Commit a transaction.
     *
     * It is necessary to override the abstract PDO transaction functions here, as
     * the PDO driver for MSSQL does not support transactions.
     *
     * @return integer
     */
    public function commit()
    {
        $return = true;
        $opcount = $this->getNestedTransactionCount();
        if ($opcount > 0) {
            if ($opcount === 1) {
                if ($this->isUncommitable) {
                    throw new PropelException('Cannot commit because a nested transaction was rolled back');
                } else {
                    $return = self::exec('COMMIT TRANSACTION');
                    if ($this->useDebug) {
                        $this->log('Commit transaction', null, __METHOD__);
                    }

                }
            }
            $this->nestedTransactionCount--;
        }

        return $return;
    }

    /**
     * Roll-back a transaction.
     *
     * It is necessary to override the abstract PDO transaction functions here, as
     * the PDO driver for MSSQL does not support transactions.
     *
     * @return integer
     */
    public function rollBack()
    {
        $return = true;
        $opcount = $this->getNestedTransactionCount();
        if ($opcount > 0) {
            if ($opcount === 1) {
                $return = self::exec('ROLLBACK TRANSACTION');
                if ($this->useDebug) {
                    $this->log('Rollback transaction', null, __METHOD__);
                }
            } else {
                $this->isUncommitable = true;
            }
            $this->nestedTransactionCount--;
        }

        return $return;
    }

    /**
     * Rollback the whole transaction, even if this is a nested rollback
     * and reset the nested transaction count to 0.
     *
     * It is necessary to override the abstract PDO transaction functions here, as
     * the PDO driver for MSSQL does not support transactions.
     *
     * @return integer
     */
    public function forceRollBack()
    {
        $return = true;
        $opcount = $this->getNestedTransactionCount();
        if ($opcount > 0) {
            // If we're in a transaction, always roll it back
            // regardless of nesting level.
            $return = self::exec('ROLLBACK TRANSACTION');

            // reset nested transaction count to 0 so that we don't
            // try to commit (or rollback) the transaction outside this scope.
            $this->nestedTransactionCount = 0;

            if ($this->useDebug) {
                $this->log('Rollback transaction', null, __METHOD__);
            }
        }

        return $return;
    }

    /**
     * @param  string  $seqname
     * @return integer
     */
    public function lastInsertId($seqname = null)
    {
        $result = self::query('SELECT SCOPE_IDENTITY()');

        return (int) $result->fetchColumn();
    }

    /**
     * @param  string $text
     * @return string
     */
    public function quoteIdentifier($text)
    {
        return '[' . $text . ']';
    }

}

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