Hello I write mysql query:

CREATE PROCEDURE simple6() BEGIN  SET @sql_text = concat("SELECT endtime INTO @coins_id FROM coins where id_coins = 'bitcoin'"); PREPARE stmt FROM @sql_text; EXECUTE stmt;  if @coins_id = 0 then  SET @sql_text2=concat("INSERT INTO coins (name) VALUES ('new_coins')"); PREPARE stmt2 FROM @sql_text2; EXECUTE stmt2; DEALLOCATE PREPARE stmt2;  else SET @sql_text3= concat("UPDATE coins SET name = 'xxx2' WHERE id_name = 'bitcoin'"); PREPARE stmt3 FROM @sql_text3; EXECUTE stmt3; DEALLOCATE PREPARE stmt3;  end if; DEALLOCATE PREPARE stmt; END 

I used this answer link. But something is wrong, because I have error:

#1064 – Something is wrong in your syntax next to ” in line 4

I try write instruction if to my table coins:

When isset the record id_name = bitcoin query must update name, but when does not exist id_name = bitcoin in my table now query must insert new record with name = new_coins.