the other miscellaneous improvements to EXPLAIN that were implemented while
adding the above: Turn magic numbers into symbolic constants.
Add the sqlite3MemPrint() interface accessible to the debugger. Improve
the performance and reduce the code size.
FossilOrigin-Name: 62aece66774587590bf7f88883cca1c1e76866e9df93bb1a17c4d9db894f06aa
currently code mostly works, but there are test failures. This is an
incremental check-in.
FossilOrigin-Name: e9e17e2125dbbafd5da4adb3bd2893735fa4d0aaa5f3daee75f866cb32231a8d
operator in the ON clause, put the OP_IfNoHope operator after the
OP_IfNotOpen operator, not before, to avoid a (harmless) uninitialized
register reference. Ticket [82b588d342d515d1]
FossilOrigin-Name: 8b437b47266ec2d80d85eafcfdd6949556d6c28d9d67d5f43d89799f0f5b7bd0
end of the prepared statement, be cause if they throw an exception, it will
abort the statement even if the function is never called. Better to put
constant functions in an OP_Once block.
FossilOrigin-Name: 97a18a5cd701848a9660385e31bffe2c397e3cfe57ccdb876f44d08c00d1d39a
do not get passed down into code generator logic where they might be modified.
FossilOrigin-Name: f45f5de000834da5b23cdcf12c3f0e3073287756afe06bdb77b95fb65b250258
expressions, as they might be coming from a DEFAULT or generated column
in a table constraint.
FossilOrigin-Name: a2d6f108c5d07559b125823a04c9cb072c80be80d7913097891a6192c7e1e225
database connection) so that it is the collating sequence appropriate for
the database encoding, not the UTF8 collating sequence. This helps to
ensure that the database encoding collation is always used, even for
expressions that do not have an defined collating sequence.
Ticket [1b8d7264567eb6fc].
FossilOrigin-Name: 4a5851893c3d71cc823b6ab5df5e58a852cd322fff26290f1ea05b63d67f564a
use of uninitialized registers inside triggers.
Ticket [c4c56482ced89d90]
FossilOrigin-Name: 0463576b5de0a1ee71530f0e4988fc9cceda79148520bea2c67f1fbc4a99cea9
register values are not used after they go stale. Ticket [d165ad781b39d574].
FossilOrigin-Name: bd94d7d052734460904c687756231f8aa243a2252f07f742dd1e437aa940f536
is used on the right table of a LEFT JOIN. Ticket [e12a0ae526bb51c7].
FossilOrigin-Name: 704bb9a39acbee420c1d6ac9eb1466a02dd77d3334b938bfddf235973129b5fe
sqlite3PagerFilename() for an in-memory database. This helps the result
work better with sqlite3_filename_journal() and similar functions.
FossilOrigin-Name: 63e533d28e87bbb10e0c611de4b79d22aae291b163fe59d1f95dcad9ab3939e4
acceptable as an argument to sqlite3_uri_parameter(). The interface spec does
not guarantee this, but it has been so historically and some applications
have come to depends on it.
FossilOrigin-Name: bfb09371d452d5d4dacab2ec476880bc729952f44ac0e5de90ea7ba203243c8c
a term is seen to be of low selectivity, it merely sets a new flag
(the TERM_HIGHTRUTH flag) which causes whereLoopOutputAdjust() to ignore
that term.
FossilOrigin-Name: 4558163b6a525990f0f1b6629dbb76daf49bcaf1ddbaf0c50fe05ce9ee480ff8
is less than the heuristic value, as there could be correlations unknown to
stat4. Also add additional tracing output to make truthProb adjustments more
visible.
FossilOrigin-Name: c535fea147ce5c6e4aab25d3c85a3f53a7364c5b5ee10fb6d393c5911a02be7e
probability of WHERE clause terms that do not participate in the index.
FossilOrigin-Name: 1babd6ec5d60e2c34aa1c0285ead768a88004218468e97262411973fe3487022
right table of a LEFT JOIN that does not match) and the cursor is the table
cursor for an OR-optimization with a covering index, then do not substitute
the covering index cursor, since the covering index cursor does not have
the NullRow flag set. Ticket [aa4378693018aa99]
FossilOrigin-Name: f02030b3403d67734bba471a91ad5bfdb03ddf6fdc3ef14808a04495e43b0470
