'#--------------------FN_DYNVARS_012_01-------------------------#'
SET @global_character_set_results = @@global.character_set_results;
SET @session_character_set_results = @@session.character_set_results;
SET @@global.character_set_results = utf8;
connect  con1,localhost,root,,,,;
connection con1;
SELECT @@global.character_set_results;
@@global.character_set_results
utf8mb3
SELECT @@session.character_set_results;
@@session.character_set_results
latin1
disconnect con1;
'#--------------------FN_DYNVARS_012_02-------------------------#'
connection default;
DROP TABLE IF EXISTS t1;
CREATE TABLE t1(b CHAR(40) character set utf8);
SET NAMES utf8;
'----check string literals against different character_set_results---'
check if results are converted to character_set_results 
SET @@session.character_set_results = greek;
SELECT 'ЁЂЃЄ' AS utf_text;
utf_text
????
check effect of character_set_results when introducers are used
SET @@session.character_set_results = latin1;
SELECT _latin1'M�ller' AS latin1_text;
latin1_text
M�ller
SET @@session.character_set_results = ascii;
SELECT _latin1'M�ller' AS latin1_text;
latin1_text
M?ller
check when we dont want any conversion
SET @@session.character_set_results = NULL;
SELECT 'ЁЂЃЄ' AS utf_text;
utf_text
ЁЂЃЄ
'---check results from table against different character_set_results--'
INSERT INTO t1 VALUES(_utf8'ЁЂЃЄ');
INSERT INTO t1 VALUES('ФХЦЧШ');
SET @@session.character_set_results = NULL;
SELECT b, CHAR_LENGTH(b) FROM t1;
b	CHAR_LENGTH(b)
ЁЂЃЄ	4
ФХЦЧШ	5
SET @@session.character_set_results = utf8;
SELECT b, CHAR_LENGTH(b) FROM t1;
b	CHAR_LENGTH(b)
ЁЂЃЄ	4
ФХЦЧШ	5
SET @@session.character_set_results = koi8r;
SELECT b, CHAR_LENGTH(b) FROM t1;
b	CHAR_LENGTH(b)
�???	4
�����	5
SET @@session.character_set_results = cp1250;
SELECT b, CHAR_LENGTH(b) FROM t1;
b	CHAR_LENGTH(b)
????	4
?????	5
DROP TABLE t1;
connection default;
SET @@global.character_set_results = @global_character_set_results;
SET @@session.character_set_results = @session_character_set_results;