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Avoid duplicate b-tree searches in the duplicate row detector used to

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implement DISTINCT.

FossilOrigin-Name: d577dda0a7fbfacda57e8cad2bc4651d2a05d813
This commit is contained in:
drh
2017-01-07 00:56:01 +00:00
parent e1ff3f5e11
commit a67b5cb6b3
3 changed files with 9 additions and 8 deletions
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14
manifest
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@@ -1,5 +1,5 @@
C Ensure\sthat\s"PRAGMA\scase_sensitive_like"\sand\s"PRAGMA\sshrink_memory"\sset\sthe\nnumber\sof\soutput\scolumns\sto\s0\s(as\sthey\sare\sstatements\sthat\sreturn\sno\sdata). C Avoid\sduplicate\sb-tree\ssearches\sin\sthe\sduplicate\srow\sdetector\sused\sto\nimplement\sDISTINCT.
D 2017-01-06T13:49:40.112 D 2017-01-07T00:56:01.383
F Makefile.in 41bd4cad981487345c4a84081074bcdb876e4b2e F Makefile.in 41bd4cad981487345c4a84081074bcdb876e4b2e
F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
F Makefile.msc b8ca53350ae545e3562403d5da2a69cec79308da F Makefile.msc b8ca53350ae545e3562403d5da2a69cec79308da
@@ -388,7 +388,7 @@ F src/printf.c ff10a9b9902cd2afe5f655f3013c6307d969b1fd
F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384 F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
F src/resolve.c bb070cf5f23611c44ab7e4788803684e385fc3fb F src/resolve.c bb070cf5f23611c44ab7e4788803684e385fc3fb
F src/rowset.c 7b7e7e479212e65b723bf40128c7b36dc5afdfac F src/rowset.c 7b7e7e479212e65b723bf40128c7b36dc5afdfac
F src/select.c 4437d9d5d56b6ffdedabf394c7fe3a07ff521ce9 F src/select.c 533e55a4067278fef76eff951462383d4147880f
F src/shell.c 6095531aa900decdaa765e0f3993fba7153c92c1 F src/shell.c 6095531aa900decdaa765e0f3993fba7153c92c1
F src/sqlite.h.in 29bda4bee01248a5650567d7a22fac39bad1b542 F src/sqlite.h.in 29bda4bee01248a5650567d7a22fac39bad1b542
F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
@@ -1543,7 +1543,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
P 609ac1c73f7c2b48a571c178a72383996a9538fe P 6696cd1878be4bd44a24841b04163e52d847711e
R 812971df62a9791f0bfb0122470a2213 R fe79848e4bc76903961662bd26c28411
U dan U drh
Z ebefd6b7654323e8a23a6cf648753c0a Z 1f3f3bb84e2a0b8cdaa2372e378cb7b9

2
manifest.uuid
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@@ -1 +1 @@
6696cd1878be4bd44a24841b04163e52d847711e d577dda0a7fbfacda57e8cad2bc4651d2a05d813

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src/select.c
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@@ -657,6 +657,7 @@ static void codeDistinct(
sqlite3VdbeAddOp4Int(v, OP_Found, iTab, addrRepeat, iMem, N); VdbeCoverage(v); sqlite3VdbeAddOp4Int(v, OP_Found, iTab, addrRepeat, iMem, N); VdbeCoverage(v);
sqlite3VdbeAddOp3(v, OP_MakeRecord, iMem, N, r1); sqlite3VdbeAddOp3(v, OP_MakeRecord, iMem, N, r1);
sqlite3VdbeAddOp4Int(v, OP_IdxInsert, iTab, r1, iMem, N); sqlite3VdbeAddOp4Int(v, OP_IdxInsert, iTab, r1, iMem, N);
sqlite3VdbeChangeP5(v, OPFLAG_USESEEKRESULT);
sqlite3ReleaseTempReg(pParse, r1); sqlite3ReleaseTempReg(pParse, r1);
} }