sqlite/ext/fts5/test/fts5prefix2.test
dan 64f1ef6abd Allow a search for an N character prefix in fts5 to use a prefix index of size N+1, if no prefix index of size N exists.
FossilOrigin-Name: 78a7801d8fc9e58a62e5168e35b52b7440340549123fc6a537e2abd571f6fe7b
2020-12-02 19:08:15 +00:00

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# 2020 Dec 3
#
# The author disclaims copyright to this source code. In place of
# a legal notice, here is a blessing:
#
# May you do good and not evil.
# May you find forgiveness for yourself and forgive others.
# May you share freely, never taking more than you give.
#
#***********************************************************************
#
# This file contains tests focused on prefix indexes.
#
source [file join [file dirname [info script]] fts5_common.tcl]
set testprefix fts5prefix2
# If SQLITE_ENABLE_FTS5 is defined, omit this file.
ifcapable !fts5 {
finish_test
return
}
foreach p {3 2 1} {
reset_db
do_execsql_test 1.$p.0 "
CREATE VIRTUAL TABLE t1 USING fts5(xyz, prefix=$p);
"
do_execsql_test 1.$p.1 {
INSERT INTO t1 VALUES
('May you do good and not evil.'),
('May you find forgiveness for yourself and forgive others.'),
('May you share freely, never taking more than you give f.');
}
do_execsql_test 1.$p.2 {
SELECT highlight(t1, 0, '[', ']') FROM t1('f*');
} {
{May you [find] [forgiveness] [for] yourself and [forgive] others.}
{May you share [freely], never taking more than you give [f].}
}
}
do_execsql_test 2.0 {
CREATE VIRTUAL TABLE t2 USING fts5(one, prefix=3);
INSERT INTO t2 VALUES('top');
INSERT INTO t2 VALUES('to');
INSERT INTO t2 VALUES('tommy');
}
do_execsql_test 2.1 {
SELECT * FROM t2('to*');
} {top to tommy}
finish_test