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MDEV-28769 Assertion `(m_ci->state & 32) || m_with_collate' failed in Lex_exact_charset_opt_extended_collate::Lex_exact_charset_opt_extended_collate on SET NAMES

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These system variables:
  @@character_set_client
  @@character_set_connection
  @@character_set_database
  @@character_set_filesystem
  @@character_set_results
  @@character_set_server

can now be set in numeric format only to IDs of default collations, e.g.:

SET @@character_set_xxx=9;  -- OK    (latin2_general_ci  is default)
SET @@character_set_xxx=2;  -- ERROR (latin2_czech_cs is not default)
SET @@character_set_xxx=21; -- ERROR (latin2_hungarian_ci is not default)

Before this change the server accepted IDs of non-default collations
so all three examples above worked without errors,
but this could lead to unexpected behavior in later statements.
This commit is contained in:
Alexander Barkov
2022-06-16 10:38:35 +04:00
parent 9fe784ff7e
commit a923d6f49c
13 changed files with 168 additions and 89 deletions
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26
mysql-test/suite/sys_vars/r/character_set_connection_basic.result
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@@ -378,10 +378,9 @@ SET @@character_set_connection = 1;
SELECT @@character_set_connection;
@@character_set_connection
big5
# latin2_czech_cs is not a default collation
SET @@character_set_connection = 2;
SELECT @@character_set_connection;
@@character_set_connection
latin2
ERROR 42000: Unknown character set: '2'
SET @@character_set_connection = 3;
SELECT @@character_set_connection;
@@character_set_connection
@@ -390,20 +389,19 @@ SET @@character_set_connection = 36;
SELECT @@character_set_connection;
@@character_set_connection
cp866
# cp1250_polish_ci is not a default collation
SET @@character_set_connection = 99;
SELECT @@character_set_connection;
@@character_set_connection
cp1250
ERROR 42000: Unknown character set: '99'
# Collation ID 100 does not exist
SET @@character_set_connection = 100;
ERROR 42000: Unknown character set: '100'
SET @@global.character_set_connection = 1;
SELECT @@global.character_set_connection;
@@global.character_set_connection
big5
# latin2_czech_cs is not a default collation
SET @@global.character_set_connection = 2;
SELECT @@global.character_set_connection;
@@global.character_set_connection
latin2
ERROR 42000: Unknown character set: '2'
SET @@global.character_set_connection = 3;
SELECT @@global.character_set_connection;
@@global.character_set_connection
@@ -412,10 +410,10 @@ SET @@global.character_set_connection = 36;
SELECT @@global.character_set_connection;
@@global.character_set_connection
cp866
# cp1250_polish_ci is not a default collation
SET @@global.character_set_connection = 99;
SELECT @@global.character_set_connection;
@@global.character_set_connection
cp1250
ERROR 42000: Unknown character set: '99'
# Collation ID 100 does not exist
SET @@global.character_set_connection = 100;
ERROR 42000: Unknown character set: '100'
SET @total_charset = (SELECT count(*) FROM INFORMATION_SCHEMA.CHARACTER_SETS);
@@ -435,8 +433,12 @@ SET @@character_set_connection = -1;
ERROR 42000: Unknown character set: '-1'
SET @@character_set_connection = 'utf8 ';
ERROR 42000: Unknown character set: 'utf8 '
SET @@character_set_connection=cp1250;
SET @@character_set_connection = 'l<>tin2';
ERROR 42000: Unknown character set: 'l<>tin2'
SET @@character_set_connection=cp866;
SET @@character_set_connection = 'l<>tin2';
ERROR 42000: Unknown character set: 'l?tin2'
SET @@character_set_connection = true;
SELECT @@character_set_connection AS res_with_true;
res_with_true