being methods of the "sqlite3" object, so that they can leave better error
messages when the SrcList object grows too large.
FossilOrigin-Name: df08d472b090b212fb77ce2aae0e1ffe79ae5db4b1accf55e6fdb18e8b0a7098
subquery-reuse optimization. Put an assert in place of the optimization
to detect if the need for this optimization ever returns.
FossilOrigin-Name: 4fcdc7a2939457e51aab37cab168677cd7f464a9a0aff4f8981e864a30828b3b
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
code generator into thinking they are the same CTE, which then tries to
use the manifest them both into the same transient table.
FossilOrigin-Name: 202dd033019dd27428e3cc5f6e164c95b37efe39e2753515112b201ddefca67b
of subquery that is being incorporated into the outer query - copies it
directly. This is more efficient. And it also fixes the specific test case
show for ticket [f09fcd17810f65f71789525] but it does not resolve the more
general problem that sqlite3ExprDup() does not correctly duplicate expressions
that contain subqueries with window functions.
FossilOrigin-Name: f1b18d44ff855573542c1947a42d4025dff54cacc13dac14d044521762ea9736
constraint, make sure only one of them propagates. Proposed fix for
ticket [cf5ed20fc8621b165].
FossilOrigin-Name: 5d5b596f152bb2781011a05f75f9e200774d4f69d648ef68de577b4ace973e07
EP_WinFunc property that is only true if Expr.y.pWin is a valid pointer.
This reduces the size of the Expr object by 8 bytes, reduces the overall
amount of code, and shaves over 1 million cycles off of the speed test.
FossilOrigin-Name: ad130bb86e74e6ce165fdbdce3a19699510f0e62071c1c7923b5a4538d888c7c
This fixes a problem that was introduced by check-in [206720129ed2fa8875a286]
which attempted to fix ticket [9936b2fa443fec03ff25f9]. This changes is
a fix for the follow-in tocket [510cde277783b5fb5de628].
FossilOrigin-Name: c6c9585f294710829ca24b64d70a36fd9f409261dd0661367c6c4198cdbc4c81
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
only scenario where it is useful. This saves prepare time for the common
case of a simple query.
FossilOrigin-Name: 598d608359005b13fa1151c6c69f2fd12ef3ab7f563a035fc4a6f3c569dc6c67
mechanism is changed to take affinity and collation into account. This
seems to give correct answers. But the search for constant propagation
costs 4 million cycles in the speed test.
FossilOrigin-Name: 82c67efb723dba387964f690cd459b420e59e3367d9589016597a76531596391
WHERE close, not just those that contain a subquery. This then demonstrates
that the current implementation is inadequate since it does not take into
account collating sequences.
FossilOrigin-Name: 57eb2abd5b270d65be5e0f138f0d46899fa6091df3ba20b0ea7ef04244a15d48
integers rather than "0x%p". This is more readable and yields the same result
on successive runs.
FossilOrigin-Name: a7cdc5bc85e0edfcc38f920c2ce91599bcbfdb49522d88b08c64596546d13881
associated with Window Functions, for improved readability of EXPLAIN
output.
FossilOrigin-Name: fa6538050938ffeb042fbee31512514d6d3ace514b2a3dfd8365bbeb13f35a78
clause and a frame starting point other than "UNBOUNDED PRECEDING".
FossilOrigin-Name: 43eb1e75a4d7ac0973ed8589bbaf379c24cdc8eacc4e613610d2d4c24d385dc1
that does not use min() or max() once per group, instead of once per row
visited.
FossilOrigin-Name: dce2dfbe1590deb3ef5661230ae2d232bd492441195defbf698ac56f9629211c
