Package com.illumon.iris.db.tables.utils

Class BigDecimalUtils

java.lang.Object

com.illumon.iris.db.tables.utils.BigDecimalUtils

public class BigDecimalUtils
extends Object

Utilities to support BigDecimal exhaust. Parquet decimal types make a whole column decimal type have a fixed precision and scale; BigDecimal columns in Deephaven are, each value, arbitrary precision (its own precision and scale). For static tables, it is possible to compute overall precision and scale values that fit every existing value. For refreshing tables, we need the user to tell us.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	BigDecimalUtils.PrecisionAndScale	Immutable way to store and pass precision and scale values.

Constructor Summary

Constructors

Constructor	Description
BigDecimalUtils()

Method Summary

Modifier and Type	Method	Description
static BigDecimalUtils.PrecisionAndScale	computePrecisionAndScale(Table t, String colName)	Compute an overall precision and scale that would fit all existing values in a table.
static BigDecimalUtils.PrecisionAndScale	computePrecisionAndScale(Index rowSet, ColumnSource<BigDecimal> source)	Compute an overall precision and scale that would fit all existing values in a column source.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Details

BigDecimalUtils

public BigDecimalUtils()

Method Details

computePrecisionAndScale

public static BigDecimalUtils.PrecisionAndScale computePrecisionAndScale(Table t, String colName)

Compute an overall precision and scale that would fit all existing values in a table.

Parameters:

t - a Deephaven table

colName - a Column for t, which should be of BigDecimal type

Returns:

a PrecisionAndScale object result.

computePrecisionAndScale

public static BigDecimalUtils.PrecisionAndScale computePrecisionAndScale(Index rowSet, ColumnSource<BigDecimal> source)

Compute an overall precision and scale that would fit all existing values in a column source.

Parameters:

rowSet - The rowset for the provided column

source - a ColumnSource of BigDecimal type

Returns:

a PrecisionAndScale object result.