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# 2015-11-07
#
# 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 the WITH clause.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set ::testprefix with3
ifcapable {!cte} {
finish_test
return
}
# Test problems found by Kostya Serebryany using
# LibFuzzer. (http://llvm.org/docs/LibFuzzer.html)
#
do_catchsql_test 1.0 {
WITH i(x) AS (
WITH j AS (SELECT 10)
SELECT 5 FROM t0 UNION SELECT 8 FROM m
)
SELECT * FROM i;
} {1 {no such table: m}}
# Additional test cases that came out of the work to
# fix for Kostya's problem.
#
do_execsql_test 2.0 {
WITH
x1 AS (SELECT 10),
x2 AS (SELECT 11),
x3 AS (
SELECT * FROM x1 UNION ALL SELECT * FROM x2
),
x4 AS (
WITH
x1 AS (SELECT 12),
x2 AS (SELECT 13)
SELECT * FROM x3
)
SELECT * FROM x4;
} {10 11}
do_execsql_test 2.1 {
CREATE TABLE t1(x);
WITH
x1(a) AS (values(100))
INSERT INTO t1(x)
SELECT * FROM (WITH x2(y) AS (SELECT * FROM x1) SELECT y+a FROM x1, x2);
SELECT * FROM t1;
} {200}
#-------------------------------------------------------------------------
# Test that the planner notices LIMIT clauses on recursive WITH queries.
#
ifcapable analyze {
do_execsql_test 3.1.1 {
CREATE TABLE y1(a, b);
CREATE INDEX y1a ON y1(a);
WITH cnt(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM cnt LIMIT 1000)
INSERT INTO y1 SELECT i%10, i FROM cnt;
ANALYZE;
}
do_eqp_test 3.1.2 {
WITH cnt(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM cnt LIMIT 1)
SELECT * FROM cnt, y1 WHERE i=a
} {
3 0 0 {SCAN TABLE cnt}
1 0 0 {COMPOUND SUBQUERIES 0 AND 0 (UNION ALL)}
0 0 0 {SCAN SUBQUERY 1}
0 1 1 {SEARCH TABLE y1 USING INDEX y1a (a=?)}
}
do_eqp_test 3.1.3 {
WITH cnt(i) AS ( SELECT 1 UNION ALL SELECT i+1 FROM cnt LIMIT 1000000)
SELECT * FROM cnt, y1 WHERE i=a
} {
3 0 0 {SCAN TABLE cnt}
1 0 0 {COMPOUND SUBQUERIES 0 AND 0 (UNION ALL)}
0 0 1 {SCAN TABLE y1}
0 1 0 {SEARCH SUBQUERY 1 USING AUTOMATIC COVERING INDEX (i=?)}
}
}
do_execsql_test 3.2.1 {
CREATE TABLE w1(pk INTEGER PRIMARY KEY, x INTEGER);
CREATE TABLE w2(pk INTEGER PRIMARY KEY);
}
do_eqp_test 3.2.2 {
WITH RECURSIVE c(w,id) AS (SELECT 0, (SELECT pk FROM w2 LIMIT 1)
UNION ALL SELECT c.w + 1, x FROM w1, c LIMIT 1)
SELECT * FROM c, w2, w1
WHERE c.id=w2.pk AND c.id=w1.pk;
} {
2 0 0 {EXECUTE SCALAR SUBQUERY 3}
3 0 0 {SCAN TABLE w2}
4 0 0 {SCAN TABLE w1}
4 1 1 {SCAN TABLE c}
1 0 0 {COMPOUND SUBQUERIES 0 AND 0 (UNION ALL)} 0 0 0 {SCAN SUBQUERY 1}
0 1 1 {SEARCH TABLE w2 USING INTEGER PRIMARY KEY (rowid=?)}
0 2 2 {SEARCH TABLE w1 USING INTEGER PRIMARY KEY (rowid=?)}
}
finish_test
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