org.apache.ojb.broker.platforms

Class PlatformPostgreSQLImpl

java.lang.Object

org.apache.ojb.broker.platforms.PlatformDefaultImpl

org.apache.ojb.broker.platforms.PlatformPostgreSQLImpl

All Implemented Interfaces:

JoinSyntaxTypes, Platform

public class PlatformPostgreSQLImpl
extends PlatformDefaultImpl

This class extends PlatformDefaultImpl and defines specific behavior for the PostgreSQL platform.

Many of the database sequence specific properties can be specified using custom attributes within the sequence-manager element.
The database sequence specific properties are generally speaking, see database user guide for detailed description.

Implementation configuration properties:

Property Key	Property Values
sequenceStart	DEPRECATED. Database sequence specific property. Specifies the first sequence number to be generated. Allowed: 1 or greater.
seq.start	Database sequence specific property. Specifies the first sequence number to be generated. Allowed: 1 or greater.
seq.incrementBy	Database sequence specific property. Specifies the interval between sequence numbers. This value can be any positive or negative integer, but it cannot be 0.
seq.maxValue	Database sequence specific property. Set max value for sequence numbers.
seq.minValue	Database sequence specific property. Set min value for sequence numbers.
seq.cycle	Database sequence specific property. If true, specifies that the sequence continues to generate values after reaching either its maximum or minimum value. If false, specifies that the sequence cannot generate more values after reaching its maximum or minimum value.
seq.cache	Database sequence specific property. Specifies how many values of the sequence Oracle preallocates and keeps in memory for faster access. Allowed values: 2 or greater. If set 0, an explicite nocache expression will be set.
seq.order	Database sequence specific property. If set true, guarantees that sequence numbers are generated in order of request. If false, a no order expression will be set.

Version:

$Id: PlatformPostgreSQLImpl.java 365232 2005-12-21 22:36:07Z tomdz $

Author:

Thomas Mahler

Field Summary

Fields inherited from interface org.apache.ojb.broker.accesslayer.JoinSyntaxTypes

ORACLE_JOIN_SYNTAX, SQL92_JOIN_SYNTAX, SQL92_NOPAREN_JOIN_SYNTAX, SYBASE_JOIN_SYNTAX

Constructor Summary

Constructors

Constructor and Description
PlatformPostgreSQLImpl()

Method Summary

Methods

Modifier and Type	Method and Description
void	addPagingSql(java.lang.StringBuffer anSqlString) Add the LIMIT or equivalent to the SQL SQL-Paging is not yet supported
int	bindPagingParameters(java.sql.PreparedStatement ps, int index, int startAt, int endAt) Bind the Paging Parameters SQL-Paging is not yet supported
java.lang.String	createSequenceQuery(java.lang.String sequenceName) Override this method to enable database based sequence generation
java.lang.String	createSequenceQuery(java.lang.String sequenceName, java.util.Properties prop) Returns a query to create a sequence entry.
java.lang.String	dropSequenceQuery(java.lang.String sequenceName) Override this method to enable database based sequence generation
java.lang.String	getEscapeClause(LikeCriteria aCriteria) Answer the Clause used Escape wildcards in LIKE
java.lang.String	nextSequenceQuery(java.lang.String sequenceName) Override this method to enable database based sequence generation
void	setObjectForStatement(java.sql.PreparedStatement ps, int index, java.lang.Object value, int sqlType) Called to let the Platform implementation perform any JDBC type-specific operations needed by the driver when binding positional parameters for a PreparedStatement.
boolean	supportsPaging() Answer true if LIMIT or equivalent is supported SQL-Paging is not yet supported

Methods inherited from class org.apache.ojb.broker.platforms.PlatformDefaultImpl

addBatch, afterStatementClose, afterStatementCreate, beforeBatch, beforeStatementClose, bindPagingParametersFirst, changeAutoCommitState, concatenate, executeBatch, getJoinSyntaxType, getLastInsertIdentityQuery, initializeJdbcConnection, prepareNextValProcedureStatement, registerOutResultSet, setNullForStatement, supportsBatchOperations, supportsMultiColumnCountDistinct, useCountForResultsetSize

Methods inherited from class java.lang.Object

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

Constructor Detail

PlatformPostgreSQLImpl

public PlatformPostgreSQLImpl()

Method Detail

setObjectForStatement

public void setObjectForStatement(java.sql.PreparedStatement ps,
                         int index,
                         java.lang.Object value,
                         int sqlType)
                           throws java.sql.SQLException

Description copied from interface: Platform

Called to let the Platform implementation perform any JDBC type-specific operations needed by the driver when binding positional parameters for a PreparedStatement.

Specified by:

setObjectForStatement in interface Platform

Overrides:

setObjectForStatement in class PlatformDefaultImpl

Throws:

java.sql.SQLException

createSequenceQuery

public java.lang.String createSequenceQuery(java.lang.String sequenceName)

Description copied from class: PlatformDefaultImpl

Override this method to enable database based sequence generation

Specified by:

createSequenceQuery in interface Platform

Overrides:

createSequenceQuery in class PlatformDefaultImpl

Parameters:

sequenceName - The name of the sequence to create.

Returns:

a sql string to create a sequence

createSequenceQuery

public java.lang.String createSequenceQuery(java.lang.String sequenceName,
                                   java.util.Properties prop)

Description copied from interface: Platform

Returns a query to create a sequence entry.

Specified by:

createSequenceQuery in interface Platform

Overrides:

createSequenceQuery in class PlatformDefaultImpl

Parameters:

sequenceName - The name of the sequence to create.

prop - The database specific sequence properties.

Returns:

a sql string to create a sequence

nextSequenceQuery

public java.lang.String nextSequenceQuery(java.lang.String sequenceName)

Description copied from class: PlatformDefaultImpl

Override this method to enable database based sequence generation

Specified by:

nextSequenceQuery in interface Platform

Overrides:

nextSequenceQuery in class PlatformDefaultImpl

Returns:

a sql string to get next sequence value

dropSequenceQuery

public java.lang.String dropSequenceQuery(java.lang.String sequenceName)

Description copied from class: PlatformDefaultImpl

Override this method to enable database based sequence generation

Specified by:

dropSequenceQuery in interface Platform

Overrides:

dropSequenceQuery in class PlatformDefaultImpl

Returns:

a sql string to drop a sequence

addPagingSql

public void addPagingSql(java.lang.StringBuffer anSqlString)

Description copied from interface: Platform

Add the LIMIT or equivalent to the SQL SQL-Paging is not yet supported

Specified by:

addPagingSql in interface Platform

Overrides:

addPagingSql in class PlatformDefaultImpl

See Also:

Platform.addPagingSql(java.lang.StringBuffer)

supportsPaging

public boolean supportsPaging()

Description copied from interface: Platform

Answer true if LIMIT or equivalent is supported SQL-Paging is not yet supported

Specified by:

supportsPaging in interface Platform

Overrides:

supportsPaging in class PlatformDefaultImpl

See Also:

Platform.supportsPaging()

bindPagingParameters

public int bindPagingParameters(java.sql.PreparedStatement ps,
                       int index,
                       int startAt,
                       int endAt)
                         throws java.sql.SQLException

Description copied from interface: Platform

Bind the Paging Parameters SQL-Paging is not yet supported

Specified by:

bindPagingParameters in interface Platform

Overrides:

bindPagingParameters in class PlatformDefaultImpl

index - parameter index

Throws:

java.sql.SQLException

See Also:

Platform.bindPagingParameters(java.sql.PreparedStatement, int, int, int)

getEscapeClause

public java.lang.String getEscapeClause(LikeCriteria aCriteria)

Description copied from interface: Platform

Answer the Clause used Escape wildcards in LIKE

Specified by:

getEscapeClause in interface Platform

Overrides:

getEscapeClause in class PlatformDefaultImpl

See Also:

Platform.getEscapeClause(org.apache.ojb.broker.query.LikeCriteria)