From: drh <>
Date: Tue, 8 Jul 2025 19:53:36 +0000 (+0000)
Subject: New optimizations to detect early when queries return no rows due to
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=9a13a21223bdfc123dfd537c999822ff3077cfa8;p=thirdparty%2Fsqlite.git

New optimizations to detect early when queries return no rows due to
tables being empty.  This includes the EXISTS-to-JOIN optimization that
tries to transform EXISTS constraints into additional terms of the FROM
clause.

FossilOrigin-Name: e33da6d5dc964db817d1bc63c9083aecd93d49ee14d5198600b47eaf7c5b9331
---

9a13a21223bdfc123dfd537c999822ff3077cfa8
diff --cc manifest
index 53a33eba01,ff1e169701..acdcb2527c
--- a/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sa\sproblem\swith\sthe\sfix\sin\s[5cb8e342e1].
- D 2025-07-08T19:02:26.486
 -C Enable\sthe\sEXISTS-to-JOIN\soptimization\sif\sthe\souter\squery\shas\sno\nFROM\sclause.
 -D 2025-07-08T17:28:09.030
++C New\soptimizations\sto\sdetect\searly\swhen\squeries\sreturn\sno\srows\sdue\sto\ntables\sbeing\sempty.\s\sThis\sincludes\sthe\sEXISTS-to-JOIN\soptimization\sthat\ntries\sto\stransform\sEXISTS\sconstraints\sinto\sadditional\sterms\sof\sthe\sFROM\nclause.
++D 2025-07-08T19:53:36.480
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+ U drh
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  # Remove this line to create a well-formed Fossil manifest.
diff --cc manifest.uuid
index 10ef81e7bd,384e800b52..156cff42a4
--- a/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
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