Appendix B: Document history

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Appendix B: Document history

The exact file history is recorded in the manual module in our CVS tree; see http://sourceforge.net/cvs/?group_id=9028.

Revision history

0.18 Apr 2005PVFirst edition.
0.215 Apr 2005PVMentioned that Fb 2.0 legalises A = NULL comparisons.
Changed text in "Testing if something is NULL".
Slightly altered "Dealing with NULLs" section.
1.024 Jan 2007PVThis is a major update, with so much new material added that the document has grown to around 4 times its former size. In addition, much of the existing text has been reorganised and thoroughly reworked. It's not feasible to give a summary of all the changes here. Consider this a new guide with 1525% old material. The most important additions are:
* NULL literals
* IS [NOT] DISTINCT FROM
* Internal functions and directives
* Predicates: IN, ANY, SOME, ALL, EXISTS, SINGULAR
* Searches (WHERE)
* Sorts (ORDER BY)
* GROUP BY and HAVING
* CASE, WHILE and FOR
* Keys and indices
* CHECK constraints
* SELECT DISTINCT
* Converting values to NULL with NULLIF
* Altering populated tables
* Bugs list
* Alphabetical index
1.0.126 Jan 2007PVMaking non-nullable columns nullable again: Provisory fix of error regarding removal of NOT NULL constraints.

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