IS NOT NULL in Cloudera-Impala

Question

I'm new on Impala, and I'm trying to write a query where one field is SUM(X), and I want to put a condition on that field. When I used that query in MySQL, "HAVING SUM(X) IS NOT NULL" worked great - does anyone know what's the equivalent in Impala?

I tried a few ways, this is what I got:

• "HAVING SUM(X) IS NOT NULL" --> AnalysisException: No matching function with signature: isnull(STRING).
• "HAVING SUM(X) NOT NULL" --> AnalysisException: Syntax error in line 93: HAVING SUM(X) NOT NULL ^ Encountered: NULL Expected: BETWEEN, IN, LIKE, REGEXP, RLIKE CAUSED BY: Exception: Syntax error

If anyone has an answer for me I'd really appreciate it... Thank you!

Answer 1

Did you try IF conditional function?

HAVING IF(SUM(X) = NULL, FALSE, TRUE)

Documentation: http://www.cloudera.com/documentation/archive/impala/2-x/2-1-x/topics/impala_conditional_functions.html