Hive column casting from decimal to double is resulting in NULL

I have hive table table1 schema of the table looks like this

{{[CREATE TABLE table1(p_decimal1 DECIMAL(38,5)) ROW FORMAT DELIMITED FIELDS TERMINATED BY ',' STORED AS TEXTFILE] }}

and i have below value in the table

{{row : col(p_decimal1) row1 : 12345123451234512345123.45123 }}

in later stage if i execute

{{select CAST(p_decimal1 AS DOUBLE) from table1; }}

query then I am getting NULL as a output. 

expected output should be non-null value.