Package dev.frostlake.types

Class NumericType

java.lang.Object

dev.frostlake.types.DataType

dev.frostlake.types.NumericType

All Implemented Interfaces:

Serializable

public class NumericType
extends DataType

See Also:

• Serialized Form

Field Summary

Fields

Modifier and Type	Field	Description
static NumericType	BIGINT
static NumericType	DECIMAL
static NumericType	DOUBLE
static NumericType	FLOAT
static NumericType	INTEGER
static NumericType	NUMBER
static NumericType	SMALLINT
static NumericType	TINYINT

Constructor Summary

Constructors

Constructor	Description
NumericType(String name, int precision, int scale)

Method Summary

Modifier and Type	Method	Description
String	formatValue(Object value)
DataType	getCommonType(DataType other)
int	getPrecision()
int	getScale()
int	getSize()
static boolean	isApproximate(DataType type)	Whether a type is one of the APPROXIMATE numeric spellings, which carry no precision and scale.
static boolean	isApproximateName(String name)	Whether a type NAME is one of the approximate spellings — for a caller that has the name and not the type, such as a driver reading column metadata off the wire.
boolean	isCompatible(DataType other)
Object	parseValue(String value)

Methods inherited from class dev.frostlake.types.DataType

equals, getCategory, getName, hashCode, toString

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Field Details

INTEGER

public static NumericType INTEGER

BIGINT

public static NumericType BIGINT

SMALLINT

public static NumericType SMALLINT

TINYINT

public static NumericType TINYINT

NUMBER

public static NumericType NUMBER

DECIMAL

public static NumericType DECIMAL

FLOAT

public static NumericType FLOAT

DOUBLE

public static NumericType DOUBLE

Constructor Details

NumericType

public NumericType(String name,
 int precision,
 int scale)

Method Details

getPrecision

public int getPrecision()

getScale

public int getScale()

parseValue

public Object parseValue(String value)

Specified by:

parseValue in class DataType

formatValue

public String formatValue(Object value)

Specified by:

formatValue in class DataType

isCompatible

public boolean isCompatible(DataType other)

Specified by:

isCompatible in class DataType

getCommonType

public DataType getCommonType(DataType other)

Specified by:

getCommonType in class DataType

getSize

public int getSize()

Specified by:

getSize in class DataType

isApproximate

public static boolean isApproximate(DataType type)

Whether a type is one of the APPROXIMATE numeric spellings, which carry no precision and scale.

Live-verified on every metadata surface: a FLOAT column is {"type":"REAL"} in SHOW COLUMNS with no numbers beside it, and leaves NUMERIC_PRECISION and NUMERIC_SCALE NULL in INFORMATION_SCHEMA. The nominal pair these constants carry is an engine-internal placeholder and must not be published to a client as though it were declared.

Parameters:

type - the type to test

Returns:

true for FLOAT and its aliases

isApproximateName

public static boolean isApproximateName(String name)

Whether a type NAME is one of the approximate spellings — for a caller that has the name and not the type, such as a driver reading column metadata off the wire.

Parameters:

name - the declared type's name

Returns:

true for FLOAT and its aliases