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Parents and children of check-in [0e317dda5d]

Add the sqlite3_index_info.idxFlags field, allowing xBestIndex() implementations to specify to SQLite that a strategy may visit at most one row. Add support for this to fts3/4. Omit the statement journal from virtual table UPDATE and DELETE operations that are guaranteed not to affect more than one row. (check-in: a1d08fd3d0 user: dan tags: trunk)
Remove dead code, replacing with assert() statements that make sure the code really was dead. (Closed-Leaf check-in: 0e317dda5d user: drh tags: vtab-onepass)
Create the sqlite3IsToplevel(Parse*) interface to check to see if a top-level VDBE is being coded (versus a trigger) and use that interface. (check-in: 59662cd2b6 user: drh tags: vtab-onepass)