Why does CTAS loss precision scale information?

[krvikash]

I have created a table in Bigquery with BIGNUMERIC data type by defining precision and scale like below.  

CREATE TABLE test.delete_me (bignumeric BIGNUMERIC (37, 2));
INSERT INTO test.delete_me VALUES (12.78);

Now When I try to use the CTAS (Create Table As Select) query, Then the newly created table loses the precision and scale information for the column. 

CREATE TABLE test.delete_me_2 AS SELECT * FROM test.delete_me;

I tried creating VIEW as well and the same issue is happening. Is this the issue expected?