postgresql变量null或null语法错误
我使用psycopg2，并且输入变化具有看起来像这样的条件：
WHERE %(variable)s is null or some_column in %(variable)s
问题是，当变量为null时，我会得到语法错误：
psycopg2.errors.SyntaxError: syntax error at or near "NULL"`
(NULL is null or (some_column IN NULL)) and
^
当然，该条件不应由于null为null已经是正确的，但是语法不通过。无论如何要解决此问题而不创建额外的变量？
I use psycopg2 and have input varaiables with a where condition that looks like this:
WHERE %(variable)s is null or some_column in %(variable)s
The problem is that when variable is null I get a syntax error:
psycopg2.errors.SyntaxError: syntax error at or near "NULL"`
(NULL is null or (some_column IN NULL)) and
^
That condition should of course not be evaluated since null is null is true already, but the syntax does not pass. Anyway to fix this without creating an extra variable?
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