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Overview
| Comment: | New test case for the ORDER BY LIMIT optimization. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
9a5a489d0d344274d0fc9fb9303503a4 |
| User & Date: | drh 2016-09-23 18:13:01 |
Context
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2016-09-23
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| 20:59 | Use sqlite3ExprAlloc() instead of sqlite3PExpr() for leaf nodes in the expression tree, where appropriate. This is both smaller and faster. check-in: afac0709 user: drh tags: trunk | |
| 18:13 | New test case for the ORDER BY LIMIT optimization. check-in: 9a5a489d user: drh tags: trunk | |
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2016-09-22
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| 21:37 | Fix a potential null-pointer dereference and crash in the case where one thread is calling sqlite3_column_text() and another thread is calling sqlite3_step() on the same prepared statement at the same instant. check-in: ee1382a3 user: drh tags: trunk | |
Changes
Changes to test/limit2.test.
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INSERT INTO t300 VALUES(0,1,99),(0,1,0),(0,0,0);
SELECT *,'.' FROM t300 WHERE a=0 AND (c=0 OR c=99) ORDER BY c DESC;
} {0 1 99 . 0 0 0 . 0 1 0 .}
do_execsql_test limit2-310 {
SELECT *,'.' FROM t300 WHERE a=0 AND (c=0 OR c=99) ORDER BY c DESC LIMIT 1;
} {0 1 99 .}
finish_test
|
> > | > > > > > > > < |
105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 |
INSERT INTO t300 VALUES(0,1,99),(0,1,0),(0,0,0);
SELECT *,'.' FROM t300 WHERE a=0 AND (c=0 OR c=99) ORDER BY c DESC;
} {0 1 99 . 0 0 0 . 0 1 0 .}
do_execsql_test limit2-310 {
SELECT *,'.' FROM t300 WHERE a=0 AND (c=0 OR c=99) ORDER BY c DESC LIMIT 1;
} {0 1 99 .}
# Make sure the SELECT loop is ordered correctly for the direction of
# the ORDER BY
#
do_execsql_test limit2-400 {
CREATE TABLE t400(a,b);
CREATE INDEX t400_ab ON t400(a,b);
INSERT INTO t400(a,b) VALUES(1,90),(1,40),(2,80),(2,30),(3,70),(3,20);
SELECT *,'x' FROM t400 WHERE a IN (1,2,3) ORDER BY b DESC LIMIT 3;
SELECT *,'y' FROM t400 WHERE a IN (1,2,3) ORDER BY +b DESC LIMIT 3;
} {1 90 x 2 80 x 3 70 x 1 90 y 2 80 y 3 70 y}
finish_test
|