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In the OP_Column opcode, if the cursor is marked NullRow (due to being the

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right table of a LEFT JOIN that does not match) and the cursor is the table
cursor for an OR-optimization with a covering index, then do not substitute
the covering index cursor, since the covering index cursor does not have
the NullRow flag set.  Ticket [aa4378693018aa99]

FossilOrigin-Name: f02030b3403d67734bba471a91ad5bfdb03ddf6fdc3ef14808a04495e43b0470
This commit is contained in:
drh 2020-02-22 13:01:19 +00:00
parent 8a64d62d31
commit e8c4f03266
4 changed files with 26 additions and 10 deletions
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16
manifest
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@ -1,5 +1,5 @@
C Add\stest\scase\sfor\sprevious\scommit.
D 2020-02-20T14:11:08.353
C In\sthe\sOP_Column\sopcode,\sif\sthe\scursor\sis\smarked\sNullRow\s(due\sto\sbeing\sthe\nright\stable\sof\sa\sLEFT\sJOIN\sthat\sdoes\snot\smatch)\sand\sthe\scursor\sis\sthe\stable\ncursor\sfor\san\sOR-optimization\swith\sa\scovering\sindex,\sthen\sdo\snot\ssubstitute\nthe\scovering\sindex\scursor,\ssince\sthe\scovering\sindex\scursor\sdoes\snot\shave\nthe\sNullRow\sflag\sset.\s\sTicket\s[aa4378693018aa99]
D 2020-02-22T13:01:19.240
F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@ -607,7 +607,7 @@ F src/vdbe.c 15cae95de3c1301747f7ee17a70046772741e7e630b6d5554c685b613798b8e8
F src/vdbe.h 51282fbe819ee0e8eeeaab176240860d334c20a12b14f3b363e7f1a4e05d60b9
F src/vdbeInt.h a17146053a1aa438474012998fe07e314f3df274a61491ad838ad85d848ac051
F src/vdbeapi.c 1252d80c548711e47a6d84dae88ed4e95d3fbb4e7bd0eaa1347299af7efddf02
F src/vdbeaux.c 4200161a1b249c33ac587c562e7dca155733694c6d4ad31914184294e4fa9e18
F src/vdbeaux.c 2d8d863e6b85a5b4362a248c04d82f0df8df79be289b2fc75b488c3cd79ddb5f
F src/vdbeblob.c 253ed82894924c362a7fa3079551d3554cd1cdace39aa833da77d3bc67e7c1b1
F src/vdbemem.c ff2a1fd86ea943efb7174bd74bc661815c449be6165e136e8849e1dc59e24353
F src/vdbesort.c 2be76d26998ce2b3324cdcc9f6443728e54b6c7677c553ad909c7d7cfab587df
@ -1702,7 +1702,7 @@ F test/where9.test 2c554b97bbdb2fdf26c57099f60db8a52bfcf7c147f2c256f9798fa0e267c
F test/whereA.test 6c6a420ca7d313242f9b1bd471dc80e4d0f8323700ba9c78df0bb843d4daa3b4
F test/whereB.test 0def95db3bdec220a731c7e4bec5930327c1d8c5
F test/whereC.test cae295158703cb3fc23bf1a108a9ab730efff0f6
F test/whereD.test 711d4df58d6d4fb9b3f5ce040b818564198be002
F test/whereD.test c1c335e914e28b122e000e9310f02d2be83e1c9dbca2e29f46bd732703944d1b
F test/whereE.test b3a055eef928c992b0a33198a7b8dc10eea5ad2f
F test/whereF.test 3d9412b1199d3e2bed34fcb76b4c48d0bf4df95d27e3f8dd27b6f8b4716d0d89
F test/whereG.test c9378b285828754377ef47fbece7264018c0a3743e7eb686e89917bb9df10885
@ -1858,7 +1858,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
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manifest.uuid
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@ -1 +1 @@
14d14eb537075c6ac77513b1e7305bed8bc01a9034dfb763fd96f76400f2b705
f02030b3403d67734bba471a91ad5bfdb03ddf6fdc3ef14808a04495e43b0470

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src/vdbeaux.c
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@ -3540,7 +3540,7 @@ int sqlite3VdbeCursorMoveto(VdbeCursor **pp, int *piCol){
assert( p->eCurType==CURTYPE_BTREE || p->eCurType==CURTYPE_PSEUDO );
if( p->deferredMoveto ){
int iMap;
if( p->aAltMap && (iMap = p->aAltMap[1+*piCol])>0 ){
if( p->aAltMap && (iMap = p->aAltMap[1+*piCol])>0 && !p->nullRow ){
*pp = p->pAltCursor;
*piCol = iMap - 1;
return SQLITE_OK;

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test/whereD.test
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@ -337,6 +337,22 @@ do_searchcount_test 6.6.4 {
SELECT c FROM x1 WHERE b=6 OR c=11 OR a=1
} {7 11 3 search 7}
# 2020-02-22 ticket aa4378693018aa99
# In the OP_Column opcode, if a cursor is marked with OP_NullRow
# (because it is the right table of a LEFT JOIN that does not match)
# then do not substitute index cursors, as the index cursors do not
# have the VdbeCursor.nullRow flag set.
#
do_execsql_test 6.7 {
DROP TABLE IF EXISTS t1;
DROP TABLE IF EXISTS t2;
CREATE TABLE t1(a UNIQUE, b UNIQUE);
INSERT INTO t1(a,b) VALUES(null,2);
CREATE VIEW t2 AS SELECT * FROM t1 WHERE b<10 OR a<7 ORDER BY b;
SELECT t1.* FROM t1 LEFT JOIN t2 ON abs(t1.a)=abs(t2.b);
} {{} 2}
#-------------------------------------------------------------------------
#
do_execsql_test 7.0 {