io.ebean.config.dbplatform

Class DbStandardHistorySupport

java.lang.Object

io.ebean.config.dbplatform.DbStandardHistorySupport

All Implemented Interfaces:

DbHistorySupport

Direct Known Subclasses:

HanaHistorySupport, OracleDbHistorySupport, SqlServerHistorySupport

public abstract class DbStandardHistorySupport
extends Object
implements DbHistorySupport

SQL2011 based history support using 'as of timestamp' type clause appended as part of the the from or join clause.

Constructor Summary

Constructors

Constructor and Description
DbStandardHistorySupport()

Method Summary

Modifier and Type	Method and Description
String	getAsOfPredicate(String tableAlias, String sysPeriod) Return null - not used for sql2011 based history.
int	getBindCount() Return 1 as the bind count (not 2 for effective start and effective end columns).
boolean	isStandardsBased() Return true if the implementation is SQL2011 standards based.

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.ebean.config.dbplatform.DbHistorySupport

getAsOfViewSuffix, getSysPeriodLower, getSysPeriodUpper, getVersionsBetweenSuffix

Constructor Detail

DbStandardHistorySupport

public DbStandardHistorySupport()

Method Detail

isStandardsBased

public boolean isStandardsBased()

Description copied from interface: DbHistorySupport

Return true if the implementation is SQL2011 standards based.

Non standards based means we need to add additional predicates into the JOIN ON clause and add an additional predicate for the base table.

Specified by:

isStandardsBased in interface DbHistorySupport

getBindCount

public int getBindCount()

Return 1 as the bind count (not 2 for effective start and effective end columns).

Specified by:

getBindCount in interface DbHistorySupport

getAsOfPredicate

public String getAsOfPredicate(String tableAlias,
                               String sysPeriod)

Return null - not used for sql2011 based history.

Specified by:

getAsOfPredicate in interface DbHistorySupport

Parameters:

tableAlias - The table alias this predicate is added for

sysPeriod - The name of the 'sys_period' column used for effective date time range.

Returns:

The predicate containing a single ? bind parameter which will be bound to the 'as at' timestamp value