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# 2024-10-05
#
# 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 implements regression tests for SQLite library. The
# focus of this file is testing indexes on expressions.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix indexexpr3
do_execsql_test 1.0 {
CREATE TABLE t1(a, j);
INSERT INTO t1 VALUES(1, '{x:"one"}');
INSERT INTO t1 VALUES(2, '{x:"two"}');
INSERT INTO t1 VALUES(3, '{x:"three"}');
CREATE INDEX i1 ON t1( json_extract(j, '$.x') );
CREATE INDEX i2 ON t1( a, json_extract(j, '$.x') );
}
proc do_hasfunction_test {tn sql res} {
set nFunction 0
db eval "EXPLAIN $sql" x {
if {$x(opcode)=="Function"} {
incr nFunction
}
}
do_execsql_test $tn "
SELECT $nFunction;
$sql
" $res
}
do_hasfunction_test 1.1 {
SELECT json_extract(j, '$.x') FROM t1 ORDER BY 1;
} {
0 one three two
}
do_hasfunction_test 1.2 {
SELECT json_extract(j, '$.x') FROM t1 WHERE a=2
} {
0 two
}
do_hasfunction_test 1.3 {
SELECT coalesce(json_extract(j, '$.x'), 'five') FROM t1 WHERE a=2
} {
0 two
}
do_hasfunction_test 1.4 {
SELECT json_extract(j, '$.x') || '.two' FROM t1 WHERE a=2
} {
0 two.two
}
do_hasfunction_test 1.5 {
SELECT json_insert( '{}', '$.y', json_extract(j, '$.x') ) FROM t1 WHERE a=2
} {
2 {{"y":"two"}}
}
do_hasfunction_test 1.6 {
SELECT json_insert( '{}', '$.y', coalesce( json_extract(j, '$.x'), 'five' ) )
FROM t1 WHERE a=2
} {
2 {{"y":"two"}}
}
#-------------------------------------------------------------------------
reset_db
do_execsql_test 2.0 {
CREATE TABLE t1(a, b, j);
CREATE INDEX i1 ON t1( a, json_extract(j, '$.x') );
}
do_eqp_test 2.1 {
SELECT json_extract(j, '$.x') FROM t1 WHERE a=?
} {
t1 USING COVERING INDEX i1
}
do_eqp_test 2.2 {
SELECT b, json_extract(j, '$.x') FROM t1 WHERE a=?
} {
t1 USING INDEX i1
}
do_eqp_test 2.3 {
SELECT json_insert( '{}', json_extract(j, '$.x') ) FROM t1 WHERE a=?
} {
t1 USING INDEX i1
}
do_eqp_test 2.4 {
SELECT sum( json_extract(j, '$.x') ) FROM t1 WHERE a=?
} {
t1 USING COVERING INDEX i1
}
do_eqp_test 2.5 {
SELECT json_extract(j, '$.x'), sum( json_extract(j, '$.x') ) FROM t1 WHERE a=?
} {
t1 USING INDEX i1
}
finish_test
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