/ Check-in [869f8947]
Login
SQLite training in Houston TX on 2019-11-05 (details)
Part of the 2019 Tcl Conference

Many hyperlinks are disabled.
Use anonymous login to enable hyperlinks.

Overview
Comment:Comment enhancement to better explain the logic in the "x IS NULL" optimization.
Downloads: Tarball | ZIP archive | SQL archive
Timelines: family | ancestors | descendants | both | trunk
Files: files | file ages | folders
SHA1: 869f894798a65f8bc0e0b083866a784fa0189f68
User & Date: drh 2011-03-17 01:58:21
Context
2011-03-17
16:45
Update the implementation of ".testctrl" in the command-line shell to use a look-up table rather than a long sequence of if-elses. Shorten source code lines of shell.c to 80 characters or less. check-in: 54bacb95 user: drh tags: trunk
01:58
Comment enhancement to better explain the logic in the "x IS NULL" optimization. check-in: 869f8947 user: drh tags: trunk
01:34
Enhances to the query planner such that "x IS NULL" constraints take the STAT2 statistics into account, just like "x=VALUE" constraints. check-in: 23531768 user: drh tags: trunk
Changes
Unified Diffs Side-by-Side Diffs Patch

Changes to src/where.c.