Values in WHERE conditions are returned as 'NULL' when they shouldn't

[adrienlabelle]

php-sql-query-builder/src/Builder/Syntax/PlaceholderWriter.php

Line 81 in cc34010

protected function writeNullSqlString($value)

This piece of code will replace the following tested values with 'NULL': '0', ''. which is incorrect. A NOT NULL column could be set to an empty string or a VARCHAR column can be set to '0' for example. IMHO the only valid mapping for 'NULL' is the null type.

[pthreat]

I found this problem too, this is the reason why I forked this library to fix said issue