Recent changes to 22: special value representing NULL

#22 special value representing NULL

Simon Chenery — Wed, 26 Aug 2020 19:42:58 -0000

Also requested in csvjdbc Help Forum topic Is there a way to handle missing values.

#22 special value representing NULL

Simon Chenery — Wed, 27 Jan 2016 22:01:59 -0000

Also requested in csvjdbc-develop topic Feature request: Adding more line skipping options.

#22 special value representing NULL

Simon Chenery — Tue, 15 Jul 2014 19:18:45 -0000

Is this necessary?

You can use the SQL NULLIF function to convert unwanted column values to NULL and it is usable with other SQL expressions:

-- Convert 'NULL' to NULL
SELECT AUTHOR, NULLIF(COMMENT, 'NULL') FROM POSTS

-- Convert 'NULL' in any case to NULL
SELECT NULLIF(UPPER(COMMENT), 'NULL') FROM POSTS

special value representing NULL

Mario Frasca — Thu, 05 Feb 2009 11:04:02 -0000

accept a property that specifies a string that will be interpreted as the SQL NULL value. all getters on that field will then return Null.

the property could be called nullString. the default value could be "NULL" and I would prefer to have it case sensitive.