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Refactor the LIKE optimization decision logic so that it uses

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sqlite3AtoF() on both boundary keys to determine if the optimization can be
used when the LHS is something that might not have TEXT affinity.
Ticket [ce8717f0885af975].  See also [c94369cae9b561b1],
[b043a54c3de54b28], [fd76310a5e843e07], and [158290c0abafde67].

FossilOrigin-Name: b4a9e09e60213ccff925d09f0b6e549e2a3e3862856c710f108779e2867dec76
This commit is contained in:
drh
2019-06-14 12:28:21 +00:00
parent 4eb4e4fe7e
commit 060b7fa974
7 changed files with 71 additions and 39 deletions
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9
test/like3.test
View File

@@ -198,6 +198,15 @@ do_execsql_test like3-5.400 {
SELECT * FROM t0 WHERE t0.c0 LIKE './';
} {./}
# 2019-06-14
# Ticket https://www.sqlite.org/src/info/ce8717f0885af975
do_execsql_test like3-5.410 {
DROP TABLE IF EXISTS t0;
CREATE TABLE t0(c0 INT UNIQUE COLLATE NOCASE);
INSERT INTO t0(c0) VALUES ('.1%');
SELECT * FROM t0 WHERE t0.c0 LIKE '.1%';
} {.1%}
# 2019-02-27
# Verify that the LIKE optimization works with an ESCAPE clause when

2
test/tkt-78e04e52ea.test
View File

@@ -41,7 +41,7 @@ do_test tkt-78e04-1.3 {
}
} {}
do_test tkt-78e04-1.4 {
db eval {EXPLAIN QUERY PLAN SELECT "" FROM "" WHERE "" LIKE '1abc%';}
db eval {EXPLAIN QUERY PLAN SELECT "" FROM "" WHERE "" LIKE '1e5%';}
} {/*SCAN TABLE USING COVERING INDEX i1*/}
do_test tkt-78e04-1.5 {
execsql {

16
test/vtab1.test
View File

@@ -1311,10 +1311,13 @@ foreach {tn sql res filter} {
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b >= ? AND b < ?} 8 9}
1.3 "SELECT a FROM e6 WHERE b LIKE '8J%'" {3 4}
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b like ?} 8J%}
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b >= ? AND b < ? AND b like ?} 8J 8k 8J%}
1.4 "SELECT a FROM e6 WHERE b LIKE '8j%'" {3 4}
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b like ?} 8j%}
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b >= ? AND b < ? AND b like ?} 8J 8k 8j%}
1.5 "SELECT a FROM e6 WHERE b LIKE '8%'" {3 4}
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b like ?} 8%}
} {
set echo_module {}
do_execsql_test 18.$tn.1 $sql $res
@@ -1323,11 +1326,14 @@ foreach {tn sql res filter} {
do_execsql_test 18.2.0 { PRAGMA case_sensitive_like = ON }
foreach {tn sql res filter} {
2.1 "SELECT a FROM e6 WHERE b LIKE '8J%'" {3 4}
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b like ?} 8J%}
2.1 "SELECT a FROM e6 WHERE b LIKE '8%'" {3 4}
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b like ?} 8%}
2.2 "SELECT a FROM e6 WHERE b LIKE '8j%'" {}
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b like ?} 8j%}
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b >= ? AND b < ? AND b like ?} 8j 8k 8j%}
2.3 "SELECT a FROM e6 WHERE b LIKE '8J%'" {3 4}
{xFilter {SELECT rowid, a, b FROM 't6' WHERE b >= ? AND b < ? AND b like ?} 8J 8K 8J%}
} {
set echo_module {}
do_execsql_test 18.$tn.1 $sql $res

20
test/vtabH.test
View File

@@ -32,13 +32,27 @@ do_execsql_test 1.0 {
foreach {tn sql expect} {
1 "SELECT * FROM e6 WHERE b LIKE '8abc'" {
xBestIndex {SELECT rowid, a, b FROM 't6' WHERE b like ?}
xFilter {SELECT rowid, a, b FROM 't6' WHERE b like ?} 8abc
xBestIndex
{SELECT rowid, a, b FROM 't6' WHERE b >= ? AND b < ? AND b like ?}
xFilter
{SELECT rowid, a, b FROM 't6' WHERE b >= ? AND b < ? AND b like ?}
8ABC 8abd 8abc
}
2 "SELECT * FROM e6 WHERE b GLOB '8abc'" {
xBestIndex
{SELECT rowid, a, b FROM 't6' WHERE b >= ? AND b < ? AND b glob ?}
xFilter
{SELECT rowid, a, b FROM 't6' WHERE b >= ? AND b < ? AND b glob ?}
8abc 8abd 8abc
}
3 "SELECT * FROM e6 WHERE b LIKE '8e/'" {
xBestIndex {SELECT rowid, a, b FROM 't6' WHERE b like ?}
xFilter {SELECT rowid, a, b FROM 't6' WHERE b like ?} 8e/
}
4 "SELECT * FROM e6 WHERE b GLOB '8e/'" {
xBestIndex {SELECT rowid, a, b FROM 't6' WHERE b glob ?}
xFilter {SELECT rowid, a, b FROM 't6' WHERE b glob ?} 8abc
xFilter {SELECT rowid, a, b FROM 't6' WHERE b glob ?} 8e/
}
} {
do_test 1.$tn {