Stored procedure call return wrong BigDecimal scale.

[DmitriyGod]

Driver version

latest

SQL Server version

mcr.microsoft.com/mssql/server:2022-latest

Client Operating System

any

JAVA/JVM version

any

Table schema

no

Problem description

Stored procedure call return wrong BigDecimal scale.

Expected behavior

Return type defined scale

Actual behavior

Return wrong scale.

Error message/stack trace

var stmt = connection.createStatement();
stmt.execute("""
    create procedure test_bigdecimal
        @big_decimal_type      decimal(15, 3)       ,
        @big_decimal_type_o    decimal(15, 3) output
       as begin
           set @big_decimal_type_o = @big_decimal_type;
       end;
    """);
var call = connection.prepareCall("""
    {call test_bigdecimal(100.241, ?)}""");
call.registerOutParameter(1, Types.DECIMAL);
call.execute();

var actual = call.getBigDecimal(1);

var expected = new BigDecimal("100.241");

Assertions.assertEquals(expected, actual);

This example shows that driver returns 4 scale instead of 3.
So here is example driver returns 4 scale instead of 5:

var stmt = connection.createStatement();
stmt.execute("""
    create procedure test_bigdecimal
        @big_decimal_type      decimal(15, 5)       ,
        @big_decimal_type_o    decimal(15, 5) output
       as begin
           set @big_decimal_type_o = @big_decimal_type;
       end;
    """);
var call = connection.prepareCall("""
    {call test_bigdecimal(100.24112, ?)}""");
call.registerOutParameter(1, Types.DECIMAL);
call.execute();

var actual = call.getBigDecimal(1);

var expected = new BigDecimal("100.24112");

Assertions.assertEquals(expected, actual);

I think there is some place in driver fixing scale.

Any other details that can be helpful

JDBC trace logs

(1)
Expected :100.241
Actual :100.2410
(2)

Expected :100.24112
Actual :100.2411

[machavan]

While this is investigated further, does the below workaround help?

Changing

call.registerOutParameter(1, Types.DECIMAL);

to

call.registerOutParameter(1, Types.DOUBLE);`