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# 2020-12-22
#
# 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 flattening UNION ALL sub-queries.
#
set testdir [file dirname $argv0]
source $testdir/tester.tcl
set testprefix unionall2
do_execsql_test 1.0 {
CREATE TABLE t1(a, b);
CREATE TABLE t2(c, d);
CREATE VIEW v1 AS SELECT * FROM t1, t2;
CREATE VIEW v2 AS SELECT * FROM t1, t2;
CREATE VIEW vA AS
SELECT * FROM v1, (
SELECT * FROM t1 LEFT JOIN t2 ON (a=c)
)
UNION ALL
SELECT * FROM v1, v2
}
do_execsql_test 1.1 {
SELECT 1 FROM vA, vA, vA, vA, vA, vA, vA, vA, vA, vA
}
#-------------------------------------------------------------------------
do_execsql_test 2.1 {
CREATE TABLE y1(a INTEGER, b);
CREATE TABLE y2(c INTEGER, d);
CREATE TABLE x3_a(a INTEGER PRIMARY KEY, b TEXT);
CREATE TABLE x3_b(c INTEGER PRIMARY KEY, d TEXT);
}
do_execsql_test 2.2 {
SELECT * FROM y1 CROSS JOIN y2 WHERE y1.a=y2.c AND y2.c IN (
SELECT a FROM x3_a UNION ALL
SELECT c FROM x3_b ORDER BY 1
)
}
finish_test
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