Appendix B: Document history
<< A: NULL-related bugs in Firebird | Firebird Null Guide | C: License notice >>
Appendix B: Document history
The exact file history is recorded in the manual module in our CVS tree; see https://sourceforge.net/cvs/?group_id=9028.
Revision history
| 0.1 | 8 Apr 2005 | PV | First edition. |
| 0.2 | 15 Apr 2005 | PV | Mentioned that Fb 2.0 legalises A = NULL” comparisons. Changed text in "Testing if something is NULL". Slightly altered "Dealing with NULLs" section. |
| 1.0 | 24 Jan 2007 | PV | This 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 15–25% 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 |
| 1.0.1 | 26 Jan 2007 | PV | Making non-nullable columns nullable again: Provisory fix of error regarding removal of NOT NULL constraints. |
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