select where

KNIME Extensions
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1

Where condition (in Hue Hive)
…
and col1 IN (‘val1’, ‘val2’)
and (col2 NOT IN (‘valcol’) if col1 = ‘Val1’)
…
The syntax is not correct ? Can you help me ? Thank you

2

Hi @pql ,

I should say upfront that I personally have no experience of Hue Hive, but if that query is anything like regular sql-like query languages I’m used to, are you sure that “if col1…” clause is correct? Should that not be an “and” or “or” statement maybe?

3

Thank you very much for your answer takbb, maybe I’ve found something with CASE I have to try it

4

It seems to be but I am not sure :
…
and CASE
WHEN col1 IN (‘val1’, ‘val2’) THEN col2 NOT IN (‘valcol’)
END

5

@pql welcome to the online forum.

In Hive you would just use the common case when syntax

CASE
    WHEN condition1 THEN result1
    WHEN condition2 THEN result2
    WHEN conditionN THEN resultN
    ELSE result
END AS your_variable

https://www.w3schools.com/sql/sql_case.asp

You also could use where syntax if you want to set a condition on a data table and structure it with brackets and AND and OR syntax. Lists with IN () are also possible.

Also there is a short syntax for conditions with

if(x=y,'this if true','this if false')

3 Likes
6

thank you, it is ok :slight_smile:

1 Like
7

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