BLEVEL 1 => BLEVEL 2 (Teenage Wildlife)

Jonathan Lewis recently wrote a really nice blog piece blevel=1 on the dangers of an index toggling between BLEVEL 1 and BLEVEL 2. I thought it would be useful to demonstrate this issue with a quick demo (Note: this example is on 11.2.0.1, with an 8K block size).   First, create a simple little table with 336,000 rows [...]