Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_50 (fog__days_year_ INTEGER, rain__mm_year_ VARCHAR)

### Question ###
What is the amount of fog where the rain is 1 109?

### Accurate SQL ###

SELECT SUM(fog__days_year_) FROM table_name_50 WHERE rain__mm_year_ = "1 109"