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Overview
| Comment: | Avoid assuming that an expression that contains the sub-expression (? IS FALSE) or (? IS TRUE) may only be true if ? is non-null. Fix for [a976c487]. |
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| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | branch-3.30 |
| Files: | files | file ages | folders |
| SHA3-256: |
c6cc2390e91097a32992d11c74af8e77 |
| User & Date: | drh 2019-10-10 16:21:57 |
Context
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2019-10-10
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| 20:19 | Version 3.30.1 check-in: 18db032d user: drh tags: release, branch-3.30, version-3.30.1 | |
| 16:21 | Avoid assuming that an expression that contains the sub-expression (? IS FALSE) or (? IS TRUE) may only be true if ? is non-null. Fix for [a976c487]. check-in: c6cc2390 user: drh tags: branch-3.30 | |
| 16:10 | Fix a problem with running ALTER TABLE ADD COLUMN statements within a transaction that writes to one or more virtual tables. Fix for [8fe768e9]. check-in: a4974a0f user: drh tags: branch-3.30 | |
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2019-10-09
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| 21:14 | Avoid assuming that an expression that contains the sub-expression (? IS FALSE) or (? IS TRUE) may only be true if ? is non-null. Fix for [a976c487]. check-in: eb7ed90b user: dan tags: trunk | |
Changes
Changes to src/expr.c.
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case TK_ISNULL:
case TK_NOTNULL:
case TK_IS:
case TK_OR:
case TK_CASE:
case TK_IN:
case TK_FUNCTION:
testcase( pExpr->op==TK_ISNOT );
testcase( pExpr->op==TK_ISNULL );
testcase( pExpr->op==TK_NOTNULL );
testcase( pExpr->op==TK_IS );
testcase( pExpr->op==TK_OR );
testcase( pExpr->op==TK_CASE );
testcase( pExpr->op==TK_IN );
testcase( pExpr->op==TK_FUNCTION );
return WRC_Prune;
case TK_COLUMN:
if( pWalker->u.iCur==pExpr->iTable ){
pWalker->eCode = 1;
return WRC_Abort;
}
return WRC_Prune;
|
> > |
5142 5143 5144 5145 5146 5147 5148 5149 5150 5151 5152 5153 5154 5155 5156 5157 5158 5159 5160 5161 5162 5163 5164 5165 |
case TK_ISNULL:
case TK_NOTNULL:
case TK_IS:
case TK_OR:
case TK_CASE:
case TK_IN:
case TK_FUNCTION:
case TK_TRUTH:
testcase( pExpr->op==TK_ISNOT );
testcase( pExpr->op==TK_ISNULL );
testcase( pExpr->op==TK_NOTNULL );
testcase( pExpr->op==TK_IS );
testcase( pExpr->op==TK_OR );
testcase( pExpr->op==TK_CASE );
testcase( pExpr->op==TK_IN );
testcase( pExpr->op==TK_FUNCTION );
testcase( pExpr->op==TK_TRUTH );
return WRC_Prune;
case TK_COLUMN:
if( pWalker->u.iCur==pExpr->iTable ){
pWalker->eCode = 1;
return WRC_Abort;
}
return WRC_Prune;
|
Changes to test/join.test.
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INSERT INTO t1(x) VALUES(0),(1);
SELECT * FROM t1 LEFT JOIN (SELECT abs(1) AS y FROM t1) ON x WHERE NOT(y='a');
} {1 1 1 1}
do_execsql_test join-17.110 {
SELECT * FROM t1 LEFT JOIN (SELECT abs(1)+2 AS y FROM t1) ON x
WHERE NOT(y='a');
} {1 3 1 3}
finish_test
|
> > > > > > > > > > > > > > > > > > > > > > |
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INSERT INTO t1(x) VALUES(0),(1);
SELECT * FROM t1 LEFT JOIN (SELECT abs(1) AS y FROM t1) ON x WHERE NOT(y='a');
} {1 1 1 1}
do_execsql_test join-17.110 {
SELECT * FROM t1 LEFT JOIN (SELECT abs(1)+2 AS y FROM t1) ON x
WHERE NOT(y='a');
} {1 3 1 3}
#-------------------------------------------------------------------------
reset_db
do_execsql_test join-18.1 {
CREATE TABLE t0(a);
CREATE TABLE t1(b);
CREATE VIEW v0 AS SELECT a FROM t1 LEFT JOIN t0;
INSERT INTO t1 VALUES (1);
} {}
do_execsql_test join-18.2 {
SELECT * FROM v0 WHERE NOT(v0.a IS FALSE);
} {{}}
do_execsql_test join-18.3 {
SELECT * FROM t1 LEFT JOIN t0 WHERE NOT(a IS FALSE);
} {1 {}}
do_execsql_test join-18.4 {
SELECT NOT(v0.a IS FALSE) FROM v0
} {1}
finish_test
|