Qeti / POData

        // be converted to language specific function call by expression 

        // provider

        $string = new StringType();

        if ($left->typeIs($string) && $right->typeIs($string)) {

            $strcmpFunctions = FunctionDescription::stringComparisonFunctions();

            $left = new FunctionCallExpression($strcmpFunctions[0], array($left, $right));

            $right = new ConstantExpression(0, new Int32());  

        }

        $dateTime = new DateTime();

        if ($left->typeIs($dateTime) && $right->typeIs($dateTime)) {

        }

        $dateTime = new DateTime();

        if ($left->typeIs($dateTime) && $right->typeIs($dateTime)) {

            $dateTimeCmpFunctions = FunctionDescription::dateTimeComparisonFunctions();

            $left = new FunctionCallExpression( $dateTimeCmpFunctions[0], array($left, $right));

            $right = new ConstantExpression(0, new Int32());

        }

        $guid = new Guid();

        if ($left->typeIs($guid) && $right->typeIs($guid)) {

        }

        $guid = new Guid();

        if ($left->typeIs($guid) && $right->typeIs($guid)) {

            $guidEqualityFunctions = FunctionDescription::guidEqualityFunctions();

            $left = new FunctionCallExpression($guidEqualityFunctions[0], array($left, $right));

            $right = new ConstantExpression(true, new Boolean());

        }

        $binary = new Binary();

        if ($left->typeIs($binary) && $right->typeIs($binary)) {

        }

        $binary = new Binary();

        if ($left->typeIs($binary) && $right->typeIs($binary)) {

            $binaryEqualityFunctions = FunctionDescription::binaryEqualityFunctions();

            $left = new FunctionCallExpression($binaryEqualityFunctions[0], array($left, $right));

            $right = new ConstantExpression(true, new Boolean());

        }

        $null = new Null1();

        if ($left->typeIs($null) || $right->typeIs($null)) {