Precision not respected for decimals in struct

[prayansh]

Hi! I am using the databricks-sql-go library in my application and seeing this weird behaviour when querying decimal columns. I am using CAST(... AS DECIMAL(5, 2)) to get my desired precision and it works for DECIMAL columns but when I do the same for values inside structs, the precision does not apply.

For example in this sql

SELECT
    '1' AS id,
    19.99 as test_decimal,
    named_struct('col1', 'Field1', 'col2', 19.99) as arr,
    CAST(19.99 AS DECIMAL(5, 2)) as test_decimal2,
    named_struct('col1', 'Field1', 'col2', CAST(19.99 AS DECIMAL(5, 2))) as arr2;

Heres a look at the sql row in debug mode

Note that the decimal value in both structs is 19.990000000000002

With this sql I am querying the decimal value of 19.99 in different ways and I was expecting CAST(19.99 AS DECIMAL(5, 2) to be respected but instead I still get 19.990000000000002

Is there a better way to do this? Is this an issue with the driver and are there any plans to fix this on the driver side?