From: drh <>
Date: Fri, 16 Aug 2024 18:51:46 +0000 (+0000)
Subject: If a subquery has an ORDER BY clause and that ordering is helpfile in
X-Git-Tag: version-3.47.0~226
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=65a46af7ae11ffe430519dec1aa8aee9c9281376;p=thirdparty%2Fsqlite.git

If a subquery has an ORDER BY clause and that ordering is helpfile in
satisfying the ORDER BY or GROUP BY of the outer query without doing an
extra sort, then omit or reduce the sort in the outer query.  Call
this the "order-by-subquery optimization".

FossilOrigin-Name: 7a0cdc7edb704a88a77b748cd28f6e00c49849cc2c1af838b95b34232ecc21f9
---

65a46af7ae11ffe430519dec1aa8aee9c9281376
diff --cc manifest
index 6e81c8e8bf,3d86a9c04b..dd7e947eb5
--- a/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Ensure\sthat\smemory\sallocations\sin\sANALYZE\sare\salways\s8-byte\saligned\sin\sorder\nto\ssatisfy\sa\snew\sassert()\sadded\sby\s[539e4f661767ef90].
- D 2024-08-16T15:35:20.377
 -C Fix\shandling\sof\sCOLLATE.\s\sAdd\stest\scases\sfor\sthe\ssame.\s\sCode\scleanup\sfor\nimproved\sunderstandability\sand\smaintainability.
 -D 2024-08-16T11:26:21.307
++C If\sa\ssubquery\shas\san\sORDER\sBY\sclause\sand\sthat\sordering\sis\shelpfile\sin\nsatisfying\sthe\sORDER\sBY\sor\sGROUP\sBY\sof\sthe\souter\squery\swithout\sdoing\san\nextra\ssort,\sthen\somit\sor\sreduce\sthe\ssort\sin\sthe\souter\squery.\s\sCall\nthis\sthe\s"order-by-subquery\soptimization".
++D 2024-08-16T18:51:46.975
  F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
  F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
  F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@@ -2204,8 -2205,8 +2205,9 @@@ F vsixtest/vsixtest.tcl 6195aba1f12a5e1
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  U drh
- Z b629a1d86492e4c09b552ad5721d3d89
 -Z 14a0d323dd6fe70b6ed40930f5fa77fd
++Z 169fa841b16225f819f8996d6765647e
  # Remove this line to create a well-formed Fossil manifest.
diff --cc manifest.uuid
index edb9927377,b684817cd4..d32d2498e4
--- a/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- a1915cbdeccac2ed49fb8a9733abf2c6239396e3174fed2ff275f66b606c48b6
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++7a0cdc7edb704a88a77b748cd28f6e00c49849cc2c1af838b95b34232ecc21f9