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Overview
| Comment: | When the affinity of a table column is INT or REAL, make the affinity of corresponding index columns NUMERIC. This increases the precision of index lookups for large numbers so that it matches the precision of ordinary comparison operators. Ticket [40812aea1fde9594] |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA3-256: |
e0d909c740b774d8a46731696e33342b |
| User & Date: | drh 2019-08-30 23:56:34 |
Context
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2019-08-31
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| 01:33 | Remove some affinity tests that became unreachable due to the prior change. check-in: e2db1123 user: drh tags: trunk | |
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2019-08-30
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| 23:56 | When the affinity of a table column is INT or REAL, make the affinity of corresponding index columns NUMERIC. This increases the precision of index lookups for large numbers so that it matches the precision of ordinary comparison operators. Ticket [40812aea1fde9594] check-in: e0d909c7 user: drh tags: trunk | |
| 23:15 | Make sure OP_RealAffinity has been applied to all columns of type REAL in the excluded.* pseudo-table of an UPSERT. Ticket [5a3dba8104421320] check-in: 67381dad user: drh tags: trunk | |
Changes
Changes to src/insert.c.
95 96 97 98 99 100 101 102 103 104 105 106 107 108 |
aff = SQLITE_AFF_INTEGER;
}else{
assert( x==XN_EXPR );
assert( pIdx->aColExpr!=0 );
aff = sqlite3ExprAffinity(pIdx->aColExpr->a[n].pExpr);
}
if( aff<SQLITE_AFF_BLOB ) aff = SQLITE_AFF_BLOB;
pIdx->zColAff[n] = aff;
}
pIdx->zColAff[n] = 0;
}
return pIdx->zColAff;
}
|
> |
95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 |
aff = SQLITE_AFF_INTEGER;
}else{
assert( x==XN_EXPR );
assert( pIdx->aColExpr!=0 );
aff = sqlite3ExprAffinity(pIdx->aColExpr->a[n].pExpr);
}
if( aff<SQLITE_AFF_BLOB ) aff = SQLITE_AFF_BLOB;
if( aff>SQLITE_AFF_NUMERIC) aff = SQLITE_AFF_NUMERIC;
pIdx->zColAff[n] = aff;
}
pIdx->zColAff[n] = 0;
}
return pIdx->zColAff;
}
|
Changes to src/wherecode.c.
751 752 753 754 755 756 757 758 759 760 761 762 763 764 |
if( zAff ){
if( sqlite3CompareAffinity(pRight, zAff[j])==SQLITE_AFF_BLOB ){
zAff[j] = SQLITE_AFF_BLOB;
}
if( sqlite3ExprNeedsNoAffinityChange(pRight, zAff[j]) ){
zAff[j] = SQLITE_AFF_BLOB;
}
}
}
}
*pzAff = zAff;
return regBase;
}
|
> |
751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 |
if( zAff ){
if( sqlite3CompareAffinity(pRight, zAff[j])==SQLITE_AFF_BLOB ){
zAff[j] = SQLITE_AFF_BLOB;
}
if( sqlite3ExprNeedsNoAffinityChange(pRight, zAff[j]) ){
zAff[j] = SQLITE_AFF_BLOB;
}
if( zAff[j]==SQLITE_AFF_REAL ) zAff[j] = SQLITE_AFF_NUMERIC;
}
}
}
*pzAff = zAff;
return regBase;
}
|
Changes to test/affinity2.test.
112 113 114 115 116 117 118 119 120 |
do_execsql_test 506 {
SELECT quote(+-+'ce'), quote(t0.c0), quote(+-+'ce' >= t0.c0) FROM t0;
} {0 '-1' 1}
do_execsql_test 507 {
SELECT * FROM t0 WHERE +-+'ce' >= t0.c0;
} {-1 {}}
finish_test
|
> | > > > > > > > > > > |
112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 |
do_execsql_test 506 {
SELECT quote(+-+'ce'), quote(t0.c0), quote(+-+'ce' >= t0.c0) FROM t0;
} {0 '-1' 1}
do_execsql_test 507 {
SELECT * FROM t0 WHERE +-+'ce' >= t0.c0;
} {-1 {}}
# 2019-08-30 ticket https://www.sqlite.org/src/info/40812aea1fde9594
#
do_execsql_test 600 {
DROP TABLE IF EXISTS t0;
CREATE TABLE t0(c0 REAL UNIQUE);
INSERT INTO t0(c0) VALUES (3175546974276630385);
SELECT 3175546974276630385 < c0 FROM t0;
} {1}
do_execsql_test 601 {
SELECT 1 FROM t0 WHERE 3175546974276630385 < c0;
} {1}
finish_test
|