3.Hibernate Mapping Type

Mapping Type

When you prepare a Hibernate mapping file, we have seen you map the Java data type to the RDBMS data format. The types that have been declared to be used in the mapping file are not Java data types, nor are they SQL database types. This type is known as the Hibernate mapping type, which can be translated from Java to SQL and vice versa.

In this chapter, all the bases, dates and times, large data objects, and other embedded mapping data types are listed.

Original Type

Mapping Type	Java Type	ANSI SQL Type
Integer	int or Java.lang.Integer	INTEGER
Long	Long or Java.lang.Long	BIGINT
Short	Short or Java.lang.Short	SMALLINT
Float	float or java.lang.Float	FLOAT
Double	Double or java.lang.Double	DOUBLE
Big_decimal	Java.math.BigDecimal	NUMERIC
Character	Java.lang.String	CHAR (1)
String	Java.lang.String	VARCHAR
Byte	byte or Java.lang.Byte	TINYINT
Boolean	Boolean or Java.lang.Boolean	BIT
Yes/no	Boolean or Java.lang.Boolean	CHAR (1) (' Y ' or ' N ')
True/false	Boolean or Java.lang.Boolean	CHAR (1) (' T ' or ' F ')

date and Time type

Mapping Type	Java Type	ANSI SQL Type
Date	Java.util.Date or Java.sql.Date	DATE
Time	Java.util.Date or Java.sql.Time	Time
Timestamp	Java.util.Date or Java.sql.Timestamp	TIMESTAMP
Calendar	Java.util.Calendar	TIMESTAMP
Calendar_date	Java.util.Calendar	DATE

Binary and large data Objects

Mapping Type	Java Type	ANSI SQL Type
Binary	Byte[]	VARBINARY (or BLOB)
Text	Java.lang.String	Clob
Serializable	Any Java class that implements Java.io.Serializable	VARBINARY (or BLOB)
Clob	Java.sql.Clob	Clob
Blob	Java.sql.Blob	Blob

JDK-related types

mapping type	java type	ansi SQL type
Class	Java.lang.Class	VARCHAR
Locale	Java.util.Locale	VARCHAR
TimeZone	Java.util.TimeZone	VARCHAR
Currency	Java.util.Currency	VARCHAR

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3.Hibernate Mapping Type