dan
88 lines
1.9 KiB
Plaintext
88 lines
1.9 KiB
Plaintext
# 2019 August 10
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#
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# The author disclaims copyright to this source code. In place of
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# a legal notice, here is a blessing:
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#
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# May you do good and not evil.
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# May you find forgiveness for yourself and forgive others.
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# May you share freely, never taking more than you give.
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#
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#***********************************************************************
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# This file implements regression tests for SQLite library.
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#
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set testdir [file dirname $argv0]
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source $testdir/tester.tcl
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set testprefix nulls1
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if 1 {
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do_execsql_test 1.0 {
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DROP TABLE IF EXISTS t3;
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CREATE TABLE t3(a INTEGER);
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INSERT INTO t3 VALUES(NULL), (10), (30), (20), (NULL);
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} {}
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for {set a 0} {$a < 3} {incr a} {
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foreach {tn limit} {
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1 ""
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2 "LIMIT 10"
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} {
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do_execsql_test 1.$a.$tn.1 "
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SELECT a FROM t3 ORDER BY a nULLS FIRST $limit
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" {{} {} 10 20 30}
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do_execsql_test 1.$a.$tn.2 "
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SELECT a FROM t3 ORDER BY a nULLS LAST $limit
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" {10 20 30 {} {}}
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do_execsql_test 1.$a.$tn.3 "
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SELECT a FROM t3 ORDER BY a DESC nULLS FIRST $limit
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" {{} {} 30 20 10}
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do_execsql_test 1.$a.$tn.4 "
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SELECT a FROM t3 ORDER BY a DESC nULLS LAST $limit
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" {30 20 10 {} {}}
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}
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switch $a {
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0 {
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execsql { CREATE INDEX i1 ON t3(a) }
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}
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1 {
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execsql { DROP INDEX i1 ; CREATE INDEX i1 ON t3(a DESC) }
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}
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}
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}
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}
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#-------------------------------------------------------------------------
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reset_db
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do_execsql_test 2.0 {
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CREATE TABLE t2(a, b, c);
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CREATE INDEX i2 ON t2(a, b);
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INSERT INTO t2 VALUES(1, 1, 1);
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INSERT INTO t2 VALUES(1, NULL, 2);
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INSERT INTO t2 VALUES(1, NULL, 3);
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INSERT INTO t2 VALUES(1, 4, 4);
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}
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do_execsql_test 2.1 {
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SELECT * FROM t2 WHERE a=1 ORDER BY b NULLS LAST
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} {
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1 1 1 1 4 4 1 {} 2 1 {} 3
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}
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do_execsql_test 2.2 {
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SELECT * FROM t2 WHERE a=1 ORDER BY b DESC NULLS FIRST
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} {
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1 {} 3
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1 {} 2
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1 4 4
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1 1 1
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}
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finish_test
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