SQLite

Before this change, one or more read cursors could be open on a table, or a single write cursor, but not both. Both policies have the same desirable effect: they prevent writes to a table while a sequential scan of that table is underway. But the new policy is a little less restrictive. Both policies prevent an UPDATE from occurring inside a SELECT (which is what we want) but the new policy allows a SELECT to occur inside an UPDATE. (CVS 739) (check-in: 8c2a083698 user: drh tags: trunk)

callback(): o Added support for .nullvalue

do_meta_command(): o Output filename is now saved to callback struct. If using stdout, then the string "stdout" is saved. o Explain is now a toggle. When it is turned on, the current values of mode, header and colWidth are saved if not already in explain mode. When turned off, those values are restored. o Allow .mode plurals columns and lines and dot command plural .headers. o Added processing for new keywords .quit, .nullvalue, .show, .prompt.

main(): o Added -init as an option to override .sqliterc. o Added -nullvalue as a command line option. o Processes .sqliterc.

main_init(): o Genesis. Moved some initialization code here from inside main() so that it can be called initially by main and again if -init is specified.

one_input_line(): o Now takes prompts from settable values.

process_sqliterc(): o Genesis. Read .sqliterc from user's home directory and pass it to process_input(). File should contain meta commands for setups. (CVS 531) (check-in: e751338c46 user: persicom tags: trunk)