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MDEV-32026 lowercase_table2.test failures in 11.3

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Also fixes MDEV-32025 Crashes in MDL_key::mdl_key_init with lower-case-table-names=2

Change overview:
- In changes made in MDEV-31948, MDEV-31982 the code path
  which originaly worked only in case of lower-case-table-names==1
  also started to work in case of lower-case-table-names==2 in a mistake.

  Restoring the original check_db_name() compatible behavior
  (but without re-using check_db_name() itself).
- MDEV-31978 erroneously added a wrong DBUG_ASSERT. Removing.

Details:

- In mysql_change_db() the database name should be lower-cased only
  in case of lower_case_table_names==1. It should not be lower-cased
  for lower_case_table_names==2. The problem was caused by MDEV-31948.
  The new code version restored the pre-MDEV-31948 behavior, which
  used check_db_name() behavior.

- Passing lower_case_table_names==1 instead of just lower_case_table_names
  to the "casedn" parameter to DBNameBuffer constructor in sql_parse.cc
  The database name should not be lower-cased for lower_case_table_names==2.
  This restores pre-MDEV-31982 behavioir which used check_db_name() here.

- Adding a new data type Lex_ident_db_normalized, it stores database
  names which are both checked and normalized to lower case
  in case lower_case_table_names==1 and lower_case_table_names==2.

- Changing the data type for the "db" parameter to Lex_ident_db_normalized in
  lock_schema_name(), lock_db_routines(), find_db_tables_and_rm_known_files().

  This is to avoid incorrectly passing a non-normalized name in the future.

- Restoring the database name normalization in mysql_create_db_internal()
  and mysql_rm_db_internal() before calling lock_schema_name().
  The problem was caused MDEV-31982.

- Adding database name normalization in mysql_alter_db_internal()
  and mysql_upgrade_db(). This fixes MDEV-32026.

- Removing a wrong assert in Create_sp_func::create_with_db() was incorrect:

    DBUG_ASSERT(Lex_ident_fs(*db).ok_for_lower_case_names());

  The database name comes to here checked, but not normalized
  to lower case with lower-case-table-names=2.
  The assert was erroneously added by MDEV-31978.

- Recording lowercase_tables2.results and lowercase_tables4.results
  according to
    MDEV-29446 Change SHOW CREATE TABLE to display default collations
  These tests are skipped on buildbot on all platforms, so this change
  was forgotten in the patch for MDEV-29446.
This commit is contained in:
Alexander Barkov
2023-08-28 15:07:19 +04:00
parent cb37c99dd8
commit 9cb75f333f
13 changed files with 151 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

35
mysql-test/main/lowercase_table2.test
View File

@ -288,3 +288,38 @@ show create database mysql_TEST;
show create table mysql_TEST.T1;
show create table mysql_test.t1;
drop database mysql_TEST;
--echo #
--echo # MDEV-32026 lowercase_table2.test failures in 11.3
--echo #
CREATE DATABASE Db1;
SHOW CREATE DATABASE Db1;
USE Db1;
SELECT DATABASE();
DROP DATABASE Db1;
CREATE DATABASE Db1;
CREATE FUNCTION Db1.f1() RETURNS INT RETURN 10;
CREATE FUNCTION db1.f2() RETURNS INT RETURN 10;
SELECT db, name FROM mysql.proc WHERE name LIKE '^f[12]';
SELECT Db1.f1();
SELECT db1.f2();
DROP DATABASE Db1;
--echo #
--echo # MDEV-32025 Crashes in MDL_key::mdl_key_init with lower-case-table-names=2
--echo #
CREATE DATABASE `#mysql50#D+b1`;
ALTER DATABASE `#mysql50#D+b1` UPGRADE DATA DIRECTORY NAME;
SHOW CREATE DATABASE `D+b1`;
SHOW CREATE DATABASE `d+b1`;
DROP DATABASE `D+b1`;
CREATE DATABASE Db1;
ALTER DATABASE Db1 DEFAULT CHARACTER SET utf8;
SHOW CREATE DATABASE Db1;
SHOW CREATE DATABASE db1;
DROP DATABASE Db1;