updated if and only if their generator expressions reference some other
column that is being updated.
FossilOrigin-Name: d38176e93a628e03f1bd8b689fbc4152a1495388da917c2d89cefed04353d2d6
foreign key checks, in case the foreign key checks changes datatypes on
the registers holding column values. Proposed fix for ticket
[e63cbcfd3378afe6980d626].
FossilOrigin-Name: 3f1c8051648a341db4dffad66d3b1f9980d8a2b314cb0ce879cb2a10d1779b84
regardless of whether or not the indexes are partial or contain columns
that might need to be updated.
FossilOrigin-Name: e148cdad35520e6684cfeba23b003f60b55f83a6bf621aff16be8aa5612cdcee
memory allocations by deferring memory allocation until
sqlite3VdbeResolveLabel() is called, at which point the code generator has
a better idea of how big the relocation table needs to be.
The sqlite3VdbeMakeLabel() routine now takes a Parse* parameter instead of
Vdbe*.
FossilOrigin-Name: 4a0929ac76d8aa5dd65eac3b83d6bbf41e505e01d175ca0fb2b19ba02d439415
the OPFLAG_NOCHNG bit is set in P5. Fix for ticket
[69d642332d25aa3b7315a6d385]
FossilOrigin-Name: 322ab1fc613f616e9f07dc94ef74a29572a21cc476d88e97b4ce865500a47b62
indexes if none of the columns mentioned in the WHERE clause are modified by
the UPDATE.
FossilOrigin-Name: d1365a5bf0ee2f145427b81d2a593f539c3ad4705d579478703c1f65ae5f80bf
expressions on indexes during an UPDATE when the expression does not reference
any of the columns that are changing.
FossilOrigin-Name: c9f045295c4577752b0847ff2027b44661e6cb15bb08b942ccb3a0ef396f3dec
do not update the expression indexes if they do not refer to any of the
columns of the table being updated.
FossilOrigin-Name: a71b101635ed28a4c99734dabb20bd65ef1018c1d63ac143b7321cdb0fafa5d7
of bugs for many years. We recent enhancements to the performance of the
OP_Column opcode, the removing the column cache actually makes speed-check.sh
run faster. It also saves about 1,800 bytes of code space.
FossilOrigin-Name: 3f5f60cd7529330209027fdae8129cca420cec1050eae50a7750d0b715b56972
macros said a branch could not be taken when in fact it could be. Alter
some window function branch coverage macros to indicate that comparison
operands cannot be NULL.
FossilOrigin-Name: 76e42b7071a71137c0da4f10db4e653ae94a89b56e95cd3f036bff08c9500d08
prior to running VUpdate. This allows one-pass to work on virtual tables
that do not allow concurrent reads and writes. Enhance rtree to take
advantage of this new capability.
FossilOrigin-Name: b816023ce07d01024d5769e16db924374a49bf909edd12dc1344a0a1ef693db5
[0a514e62ad1ebe5c12da8dae] did not completely address the
probably in that it only worked for cases where the OP_SCopy that loaded
the register was the last instruction in the sequence for the expression, which
is not necessarily the case for expressions like CASE...END. This revision
prevents the registered that will be recomputed from being cached in the first
place.
FossilOrigin-Name: 9fd0faf517993587d2f54212638545fc85fbbc84a031bcfae8c1e5894825d83b
BEFORE triggers run when unmodified columns of the row being updated are
reloaded. Fix for ticket [d85fffd6ffe856092ed8da]
FossilOrigin-Name: 0a514e62ad1ebe5c12da8daed429ae2f9d9910471d3c5cef3b6870bdadfefca1
changes the values of some of the columns used to compute new columns in
the UPDATE.
FossilOrigin-Name: 7bb23c2a3d37f0d5e5515b917860818906819d54a0066e1ba8e9792a82f7d279
the implementation of count_changes in other places, without changing the
behavior.
FossilOrigin-Name: c6f71115eb933c2aee295bc31e5139112463c28e15a3b3ea242fd9bac168aed9
methods of virtual tables to see if a column has actually changed values.
FossilOrigin-Name: 8b7be15ece9e2e83959bb0e21e240106fe1077431242c3cc6b81f1baa2382f40
on a TK_LIMIT node, for a small code size reduction and performance increase,
and a reduction in code complexity.
FossilOrigin-Name: 3925facd942c9df663f9b29b1e6f94f6be14af8c2b99eb691bfc836b4c220826
drh