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https://issues.apache.org/jira/browse/CASSANDRA-2883?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13098398#comment-13098398
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Rick Shaw commented on CASSANDRA-2883:
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I store a full 32 bit integer encoding for the scale part of the data into C*,
which is what the Java class {{BigDecimal}} supports. but for a scale factor
that is crazy huge. I could easily be talked into using just a byte to support
128 or 256 scale. that is still 256 digits after the decimal... The unscaled
value is stored like {{IntegerType}}.
> Add Support for BigDecimal Java data type as the "DecimalType" AbstractType
> ---------------------------------------------------------------------------
>
> Key: CASSANDRA-2883
> URL: https://issues.apache.org/jira/browse/CASSANDRA-2883
> Project: Cassandra
> Issue Type: Sub-task
> Components: Core
> Affects Versions: 0.8.1
> Reporter: Rick Shaw
> Assignee: Rick Shaw
> Priority: Trivial
> Labels: CQL, JDBC,, lhf
> Fix For: 0.8.6
>
> Attachments: add-decimaltype-v1.txt
>
>
> The JDBC Driver suite needs support for {{BigDecimal}} to complete it's data
> type support for {{ResultSet}} and {{PreparedStatement}}. This datatype could
> also be used to represent numeric (non-integer) counter values. This is a
> very simple addition to the collection of data types supported by Cassandra.
> It is quite versatile like {{BigInteger}}. It can represent decimal numbers
> of virtually any precision and scale. It is represented in Java as an
> arbitrary precision integer unscaled value ( think {{IntegerType}} )and a
> 32-bit integer scale factor, which could be represented as a {{IntegerType}}
> as well. This could share much of the logic from the {{BigInteger}}
> ({{IntegerType}}) implementation.
> CQL would need to add a datatype (decimal?). Decimal literal support is
> already provided in CQL.
> This is low hanging fruit.
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