of expressions used in an index-on-expression directly from the index rather
than recomputing the value. If the expression has a top-level COLLATE or
unlikely() operator, be sure to clear the corresponding flags prior to
converting it into a TK_COLUMN expression. Failure to do this is most likely
harmless in production, but might cause an assertion fault in debugging builds.
Ticket [b0cb8aff561a6dcd]. Test cases in TH3.
FossilOrigin-Name: 56539e1c132632c075efc217ad5951a35e4459605ac128914aec3a7be1e25718
sequence for the generated column is non-standard.
Part 2 of ticket [e0a8120553f4b082]
FossilOrigin-Name: 056bb8dcbdc45989c5c6e86d2966200062e3c01c382ec52aae37c828104b4496
of its table is used by an UPDATE statement in one-pass mode, then avoid the
use of OP_DeferredSeek since the seek might not be resolved prior to the
OP_Delete and OP_Insert that implement the UPDATE.
FossilOrigin-Name: e3398c5ffb060b2b26334b8598e2c63953741e2d6f5124dbd6bdfc8e94742539
The WHERE clause of the partial index might not be true if the table of
the partial index is the right table of a left join. So disable the
optimization in that case. Ticket [623eff57e76d45f6]
FossilOrigin-Name: 3be19e1151af1850b65991edb82420f9412a7798dd756c86eaa9ffdde573263a
corresponding index columns NUMERIC. This increases the precision of
index lookups for large numbers so that it matches the precision of
ordinary comparison operators. Ticket [40812aea1fde9594]
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normal scan and 1 when scanning nulls. This enables the re-do jump at the
bottom of the loop to be coded with a single OP_IfNotZero opcode, rather
than a sequence of OP_If, OP_Integer, OP_Goto.
FossilOrigin-Name: bf875e1a259a4167694e06349458452dc36c1d38aa6843518d9ae46ce74e5559
with no affinity can appear in a zero-terminated string. Use the new
SQLITE_AFF_NONE macro for this new magic number.
FossilOrigin-Name: e8234f6939ccff4c10f741cf66d1c537cfebcbd0d1d79a618a64c755a7f087b5
keep the number of parser codes below 256 in order to save parser table space.
But we have long since blown through that ceiling so the addopcodes.tcl script
was just needless complexity. There is no longer any reason to keep it around.
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of the partial index must always be true. Use this fact to avoid evaluating
identical terms in the WHERE clause of the query.
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[df46dfb631f75694], as the new test case in this check-in demonstrates.
The fix here causes test cases for the [df46dfb631f75694] bug to fail
again, so this check-in is on a branch. A new fix is needed for
[df46dfb631f75694].
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will not be used afterwards for a (pointless) membership test. This is
a better fix for ticket [df46dfb631f75694] than the previous fix that is
now on a branch as it preserves the full optimization of
check-in [e130319317e76119].
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an index on that expression when processing a multi-index OR
(see check-in [a47efb7c8520a0111]) because the expression transformations
that are applied become invalid when the processing moves off of the current
index and on to the next index. Fix for ticket [4e8e4857d32d401f].
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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*.
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encourage the compiler to inline that routine within sqlite3WhereBegin().
This gives a performance improvement.
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a separate "INDEX" subtree for each index. SCALAR SUBQUERY entries provide
a subquery number that is related back to the .selecttrace output.
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