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Overview
| Comment: | Make sure indexes on expressions skip over initial NULL values in the index. Fix for ticket [4baa464912129477f3c9] |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
71797ba431085f9ae381ed5ea6471967 |
| User & Date: | drh 2016-10-10 13:29:15 |
Context
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2016-10-10
| ||
| 14:34 | When handling ORDER BY expressions, do not assume all values of an indexed expressions are distinct. Fix for [4766f444]. (check-in: aebe429e user: dan tags: trunk) | |
| 13:29 | Make sure indexes on expressions skip over initial NULL values in the index. Fix for ticket [4baa464912129477f3c9] (check-in: 71797ba4 user: drh tags: trunk) | |
| 10:06 | Fix a case in which the rtree module was ignoring an OOM while generating an error message. (check-in: 788f86be user: dan tags: trunk) | |
Changes
Changes to src/wherecode.c.
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testcase( bRev );
testcase( pIdx->aSortOrder[nEq]==SQLITE_SO_DESC );
assert( (bRev & ~1)==0 );
pLevel->iLikeRepCntr <<=1;
pLevel->iLikeRepCntr |= bRev ^ (pIdx->aSortOrder[nEq]==SQLITE_SO_DESC);
}
#endif
if( pRangeStart==0
&& (j = pIdx->aiColumn[nEq])>=0
&& pIdx->pTable->aCol[j].notNull==0
){
bSeekPastNull = 1;
}
}
assert( pRangeEnd==0 || (pRangeEnd->wtFlags & TERM_VNULL)==0 );
/* If we are doing a reverse order scan on an ascending index, or
** a forward order scan on a descending index, interchange the
** start and end terms (pRangeStart and pRangeEnd).
|
| | | < | > |
1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 |
testcase( bRev );
testcase( pIdx->aSortOrder[nEq]==SQLITE_SO_DESC );
assert( (bRev & ~1)==0 );
pLevel->iLikeRepCntr <<=1;
pLevel->iLikeRepCntr |= bRev ^ (pIdx->aSortOrder[nEq]==SQLITE_SO_DESC);
}
#endif
if( pRangeStart==0 ){
j = pIdx->aiColumn[nEq];
if( (j>=0 && pIdx->pTable->aCol[j].notNull==0) || j==XN_EXPR ){
bSeekPastNull = 1;
}
}
}
assert( pRangeEnd==0 || (pRangeEnd->wtFlags & TERM_VNULL)==0 );
/* If we are doing a reverse order scan on an ascending index, or
** a forward order scan on a descending index, interchange the
** start and end terms (pRangeStart and pRangeEnd).
|
Changes to test/indexexpr1.test.
319 320 321 322 323 324 325 326 327 |
SELECT *, '|' FROM t0 ORDER BY +a;
} {0 1 2 | 2 99 4 | 5 99 7 |}
do_execsql_test indexexpr1-1010 {
UPDATE t0 SET b=88 WHERE (a in(0,1))=1;
SELECT *, '|' FROM t0 ORDER BY +a;
} {0 88 2 | 2 99 4 | 5 99 7 |}
finish_test
|
> > > > | > > > > > > > > > > > > |
319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 |
SELECT *, '|' FROM t0 ORDER BY +a;
} {0 1 2 | 2 99 4 | 5 99 7 |}
do_execsql_test indexexpr1-1010 {
UPDATE t0 SET b=88 WHERE (a in(0,1))=1;
SELECT *, '|' FROM t0 ORDER BY +a;
} {0 88 2 | 2 99 4 | 5 99 7 |}
# 2016-10-10
# Make sure indexes on expressions skip over initial NULL values in the
# index as they are suppose to do.
# Ticket https://www.sqlite.org/src/tktview/4baa46491212947
#
do_execsql_test indexexpr1-1100 {
DROP TABLE IF EXISTS t1;
CREATE TABLE t1(a);
INSERT INTO t1 VALUES(NULL),(1);
SELECT '1:', typeof(a), a FROM t1 WHERE a<10;
SELECT '2:', typeof(a), a FROM t1 WHERE a+0<10;
CREATE INDEX t1x1 ON t1(a);
CREATE INDEX t1x2 ON t1(a+0);
SELECT '3:', typeof(a), a FROM t1 WHERE a<10;
SELECT '4:', typeof(a), a FROM t1 WHERE a+0<10;
} {1: integer 1 2: integer 1 3: integer 1 4: integer 1}
finish_test
|