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+# 2014-11-27
+#
+# 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 test cases for b-tree logic.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set testprefix btree01
+
+# The refactoring on the b-tree balance() routine in check-in
+# http://www.sqlite.org/src/info/face33bea1ba3a (2014-10-27)
+# caused the integrity_check on the following SQL to fail.
+#
+do_execsql_test btree01-1.1 {
+ PRAGMA page_size=65536;
+ CREATE TABLE t1(a INTEGER PRIMARY KEY, b BLOB);
+ WITH RECURSIVE
+ c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<30)
+ INSERT INTO t1(a,b) SELECT i, zeroblob(6500) FROM c;
+ UPDATE t1 SET b=zeroblob(3000);
+ UPDATE t1 SET b=zeroblob(64000) WHERE a=2;
+ PRAGMA integrity_check;
+} {ok}
+
+# The previous test is sufficient to prevent a regression. But we
+# add a number of additional tests to stress the balancer in similar
+# ways, looking for related problems.
+#
+for {set i 1} {$i<=30} {incr i} {
+ do_test btree01-1.2.$i {
+ db eval {
+ DELETE FROM t1;
+ WITH RECURSIVE
+ c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<30)
+ INSERT INTO t1(a,b) SELECT i, zeroblob(6500) FROM c;
+ UPDATE t1 SET b=zeroblob(3000);
+ UPDATE t1 SET b=zeroblob(64000) WHERE a=$::i;
+ PRAGMA integrity_check;
+ }
+ } {ok}
+}
+for {set i 1} {$i<=30} {incr i} {
+ do_test btree01-1.3.$i {
+ db eval {
+ DELETE FROM t1;
+ WITH RECURSIVE
+ c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<30)
+ INSERT INTO t1(a,b) SELECT i, zeroblob(6500) FROM c;
+ UPDATE t1 SET b=zeroblob(2000);
+ UPDATE t1 SET b=zeroblob(64000) WHERE a=$::i;
+ PRAGMA integrity_check;
+ }
+ } {ok}
+}
+for {set i 1} {$i<=30} {incr i} {
+ do_test btree01-1.4.$i {
+ db eval {
+ DELETE FROM t1;
+ WITH RECURSIVE
+ c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<30)
+ INSERT INTO t1(a,b) SELECT i, zeroblob(6500) FROM c;
+ UPDATE t1 SET b=zeroblob(6499) WHERE (a%3)==0;
+ UPDATE t1 SET b=zeroblob(6499) WHERE (a%3)==1;
+ UPDATE t1 SET b=zeroblob(6499) WHERE (a%3)==2;
+ UPDATE t1 SET b=zeroblob(64000) WHERE a=$::i;
+ PRAGMA integrity_check;
+ }
+ } {ok}
+}
+for {set i 1} {$i<=30} {incr i} {
+ do_test btree01-1.5.$i {
+ db eval {
+ DELETE FROM t1;
+ WITH RECURSIVE
+ c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<30)
+ INSERT INTO t1(a,b) SELECT i, zeroblob(6542) FROM c;
+ UPDATE t1 SET b=zeroblob(2331);
+ UPDATE t1 SET b=zeroblob(65496) WHERE a=$::i;
+ PRAGMA integrity_check;
+ }
+ } {ok}
+}
+for {set i 1} {$i<=30} {incr i} {
+ do_test btree01-1.6.$i {
+ db eval {
+ DELETE FROM t1;
+ WITH RECURSIVE
+ c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<30)
+ INSERT INTO t1(a,b) SELECT i, zeroblob(6542) FROM c;
+ UPDATE t1 SET b=zeroblob(2332);
+ UPDATE t1 SET b=zeroblob(65496) WHERE a=$::i;
+ PRAGMA integrity_check;
+ }
+ } {ok}
+}
+for {set i 1} {$i<=30} {incr i} {
+ do_test btree01-1.7.$i {
+ db eval {
+ DELETE FROM t1;
+ WITH RECURSIVE
+ c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<30)
+ INSERT INTO t1(a,b) SELECT i, zeroblob(6500) FROM c;
+ UPDATE t1 SET b=zeroblob(1);
+ UPDATE t1 SET b=zeroblob(65000) WHERE a=$::i;
+ PRAGMA integrity_check;
+ }
+ } {ok}
+}
+for {set i 1} {$i<=31} {incr i} {
+ do_test btree01-1.8.$i {
+ db eval {
+ DELETE FROM t1;
+ WITH RECURSIVE
+ c(i) AS (VALUES(1) UNION ALL SELECT i+1 FROM c WHERE i<31)
+ INSERT INTO t1(a,b) SELECT i, zeroblob(6500) FROM c;
+ UPDATE t1 SET b=zeroblob(4000);
+ UPDATE t1 SET b=zeroblob(65000) WHERE a=$::i;
+ PRAGMA integrity_check;
+ }
+ } {ok}
+}
+
+# 2022-03-06 OSSFuzz issue 45329
+# An assertion fault due to the failure to clear a flag in an optimization
+# committed last night.
+#
+# When the stay-on-last page optimization of sqlite3BtreeIndexMoveto() is
+# invoked, it needs to clear the BTCF_ValidOvfl flag.
+#
+db close
+sqlite3 db :memory:
+do_execsql_test btree01-2.1 {
+ PRAGMA page_size=1024;
+ CREATE TABLE t1(a INT PRIMARY KEY, b BLOB, c INT) WITHOUT ROWID;
+ WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<100)
+ INSERT INTO t1(a,b,c) SELECT x*2, zeroblob(100), x FROM c;
+ UPDATE t1 SET b=zeroblob(1000) WHERE a=198;
+ CREATE TABLE t2(x INTEGER PRIMARY KEY, y INT);
+ INSERT INTO t2(y) VALUES(198),(187),(100);
+ SELECT y, c FROM t2 LEFT JOIN t1 ON y=a ORDER BY x;
+} {198 99 187 {} 100 50}
+do_execsql_test btree01-2.2 {
+ SELECT y, c FROM t1 RIGHT JOIN t2 ON y=a ORDER BY x;
+} {198 99 187 {} 100 50}
+
+
+finish_test