readme

derby database source code.good for you.

-- org/apache/derbyTesting/functionTests/tests/nist/readme --

This suite includes files from the SQL Test Suite version 6.0 from the
National Insitute of Standards and Technology (NIST), an agency of the 
U.S. Department of Commerce, Gaithersburg MD 20899 available in full 
from http://www.itl.nist.gov/div897/ctg/sql_form.htm.

Pursuant the Software Acknowledgement and Redistribution agreement at
http://www.itl.nist.gov/div897/ctg/softagre.htm changes to the original
NIST suite should be documented.

The following changes were made:
- no use is made of the NIST testing harness. Instead, suiteable .sql files from
  the original sql directory have been placed in a separate (this) directory of
  the Derby functionTests package. The sql scripts are executed by the Derby 
  functionTests harness using the Derby interactive sql tool 'ij'. 
  Expected output for Derby is placed in the location suitable for the Derby 
  functionTests harness. (../../master/*).
  
- sections of the tests - i.e. selected test cases - not applicable to Derby 
  have been commented out, for instance all tests using TRIM.

- VALUES USER statements have been added to relevant test files to check the 
  correct user is used

- properties files have been added where needed to ensure the tests run with expected 
  user and database settings as per the Derby database authentication scheme

- AUTOCOMMIT OFF has been added to relevant tests to ensure proper sequencing,
  transaction management, and improve performance
 
- SET SCHEMA statements have been added to ensure proper behavior with Derby

- Date, time, and timestamp literals have been changed to match the Derby date/time constant syntax.

- The HOUR, MINUTE, SECOND, DAY, MONTH, and YEAR functions have been replaced by the equivalent EXTRACT function.

- CREATE VIEW syntax has been changed to Derby syntax

- JOIN syntax using USING has been modified to use ON keyword.

- CREATE TABLE statements have been changed to have columns participating in a primary or unique
  index be created NOT NULL.

- CHAR_LENGTH has been changed to LENGTH