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Increase the max_page_count on ROLLBACK, if necessary, so that it is sufficient

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to cover the entire database.  Fix for the problem identified by
[forum:/forumpost/3b9e894312|forum post 3b9e894312].

FossilOrigin-Name: 12c012162ce110a7a7fbbe853f422e23cb4ae10b45237727328c8f3315b70842
This commit is contained in:
drh
2022-03-01 14:13:32 +00:00
parent 935c37229c
commit 90368c5dcb
4 changed files with 39 additions and 8 deletions
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28
test/pager1.test
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@ -2925,4 +2925,32 @@ do_test 43.3 {
sqlite3_db_status db CACHE_MISS 0
} {0 1 0}
# 2022-03-01 Forum post https://sqlite.org/forum/forumpost/3b9e894312
# Ensure that max_page_count gets adjusted upward, if needed, on a
# ROLLBACK.
#
db close
sqlite3 db :memory:
do_execsql_test 44.1 {
PRAGMA page_size=4096;
PRAGMA auto_vacuum=FULL;
CREATE TABLE t1(a INTEGER PRIMARY KEY, b ANY);
WITH RECURSIVE c(x) AS (VALUES(1) UNION ALL SELECT x+1 FROM c WHERE x<50)
INSERT INTO t1(a,b) SELECT x, zeroblob(1000) FROM c;
CREATE TABLE t2 AS SELECT * FROM t1;
PRAGMA page_count;
} {31}
do_execsql_test 44.2 {
BEGIN;
DROP TABLE t2;
PRAGMA incremental_vacuum=50;
PRAGMA page_count;
PRAGMA max_page_count=2;
} {16 16}
do_execsql_test 44.3 {
ROLLBACK;
PRAGMA page_count;
PRAGMA max_page_count;
} {31 31}
finish_test