Consider using an automatic-index for a scan even if there exists a possible skip-scan that uses one or more "=" operators.
Adding the "noskipscan" token to an sqlite_stat1.stat field prevents an
index for being used with the skip-scan algorithm.
Allow an automatic index to be used if the only uses of declared indexes for
the same loop use the skip-scan algorithm.
Adding the "noskipscan" token to an sqlite_stat1.stat field prevents
an index for being used with the skip-scan algorithm.
Add an ALWAYS on an always-true branch in wal.c.
Fix the ANALYZE command so that it resets the "unordered" and "noskipscan"
flags on indices when reloading the sqlite_stat1 table.
Completely remove an assert() that had previously been commented out.
Add new requirements marks associated with the file format documentation.
No changes to code.
Add some requirements marks to the record formatting logic.  Comment changes
only - the code is unaltered.
Fix the encoding of some integers to use the minimum amount of space:
-128, -32768, -8388608, -217483648, and -140737488355328.
Ensure that when the number of cells on a page drops to zero that the freelist
and fragment counter are both cleared.  Also add evidence marks corresponding
to file-format documentation.
Add requirements marks on the built-in collating functions.
Updates to requirements tags on the mutex documentation.
Fix a benign test error on PRAGMA collation_list
introduced by a recent checkin.
Fix a typo in a requirements mark on the abs() SQL function.
Remove a redundant test case (probably a copy/paste error).  Add an assert()
to where.c to ensure that automatic indexes do not have there output row 
counts adjusted downward by supplementary constraints.
Deploy heuristics (well-commented) to better estimate how much unindexed terms
in the WHERE clause filter the number of output rows from a single table.
Fix an error in the comments from the previous check-in.
Always reinitialized the Index.bUnordered and Index.noSkipscan flags before
rereading the sqlite_stat1 table, even if SQLITE_ENABLE_STAT4 is defined.
Fix an integer overflow bug in vdbesort.c.
Fix a problem in the new b-tree balancer that was causing corruption of
the fragmentation count.