Bug in \yii\db\Schema (return syntax error on sql with plv8)

[halfmike]

What steps will reproduce the problem?

I try execute a query with plv8 extension syntax(Postgresql)
If i do it with PDO - all good
If i do it with \yii\db\Connection - getting error

$sql = 
CREATE OR REPLACE FUNCTION public.test() RETURNS numeric
LANGUAGE plv8
AS $_$
{
let param = 1;
let param2 = 1 ? 2 : 0;
return 1;
}
$_$;

Error just on operator "? : "

->createCommand($sql)->execute()

What is the expected result?

all done

What do you get instead?

SQLSTATE[XX000]: Internal error: 7 ERROR:  SyntaxError: Unexpected identifier
in /srv/api2/vendor/yiisoft/yii2/db/Schema.php:664

Error Info:
Array
(
    [0] => XX000
    [1] => 7
    [2] => ERROR:  SyntaxError: Unexpected identifier
CONTEXT:  test() LINE 4:  	let param2 = 1 $1 2 : 0;
}

Q	A
Yii version	2.0.15.1
PHP version	5.6.40
Operating system	ubuntu18.10.1

[samdark]

When executing with PDO, have you done it like the following?

Yii::$app->db->pdo->exec('YOUR_SQL_HERE')

?