org.apache.empire.dbms.postgresql

Class PostgresAtAt

java.lang.Object

org.apache.empire.db.DBObject

org.apache.empire.db.DBExpr

org.apache.empire.db.expr.compare.DBCompareExpr

org.apache.empire.dbms.postgresql.PostgresAtAt

All Implemented Interfaces:

DBPreparable

public class PostgresAtAt
extends DBCompareExpr

PostgresAtAt create a Postgres @@ comparator

Field Summary

Fields inherited from class org.apache.empire.db.expr.compare.DBCompareExpr

log

Fields inherited from class org.apache.empire.db.DBExpr

CTX_ALIAS, CTX_ALL, CTX_DEFAULT, CTX_FULLNAME, CTX_NAME, CTX_NOPARENTHESIS, CTX_VALUE

Constructor Summary

Constructors

Constructor and Description
PostgresAtAt(DBColumnExpr left, DBColumnExpr right)

Method Summary

Modifier and Type	Method and Description
void	addReferencedColumns(Set<DBColumn> list) Internal function to obtain all DBColumnExpr-objects used by this expression.
void	addSQL(DBSQLBuilder sql, long context) Used to build the SQL command.
DBCompareExpr	copy(DBCommand newCmd) internally used for command cloning
DBDatabase	getDatabase() Returns the database object to which this object belongs to.
DBRowSet	getRowSet() Returns the underlying rowset containing this column For functions involving none or more than one physical column this function return the first one
boolean	isConstraintOn(DBColumnExpr colExpr)
boolean	isMutuallyExclusive(DBCompareExpr other)
void	prepareParams(DBCommand cmd, DBExpr parent) Prepares an expression for a query This function is called by DBCommand in order to add values as query parameters instead of being literally included in the sql statement Please Note: This function is internally called.

Methods inherited from class org.apache.empire.db.expr.compare.DBCompareExpr

and, not, or

Methods inherited from class org.apache.empire.db.DBObject

checkParamNull

Methods inherited from class java.lang.Object

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

Constructor Detail

PostgresAtAt

public PostgresAtAt(DBColumnExpr left,
                    DBColumnExpr right)

Method Detail

getDatabase

public DBDatabase getDatabase()

Description copied from class: DBObject

Returns the database object to which this object belongs to. For the database object itself this function will return the this pointer.

Specified by:

getDatabase in class DBObject

Returns:

the database object

prepareParams

public void prepareParams(DBCommand cmd,
                          DBExpr parent)

Description copied from interface: DBPreparable

Prepares an expression for a query This function is called by DBCommand in order to add values as query parameters instead of being literally included in the sql statement Please Note: This function is internally called. Do not call yourself!

Parameters:

cmd - the command to which to add the parameters

parent - the parent expression holding the value

copy

public DBCompareExpr copy(DBCommand newCmd)

Description copied from class: DBCompareExpr

internally used for command cloning

Specified by:

copy in class DBCompareExpr

Parameters:

newCmd - the new command object

Returns:

the cloned compare expression

isMutuallyExclusive

public boolean isMutuallyExclusive(DBCompareExpr other)

Specified by:

isMutuallyExclusive in class DBCompareExpr

isConstraintOn

public boolean isConstraintOn(DBColumnExpr colExpr)

Specified by:

isConstraintOn in class DBCompareExpr

getRowSet

public DBRowSet getRowSet()

Description copied from class: DBCompareExpr

Returns the underlying rowset containing this column For functions involving none or more than one physical column this function return the first one

Specified by:

getRowSet in class DBCompareExpr

Returns:

a column used for this expression

addReferencedColumns

public void addReferencedColumns(Set<DBColumn> list)

Description copied from class: DBExpr

Internal function to obtain all DBColumnExpr-objects used by this expression.

Specified by:

addReferencedColumns in class DBExpr

Parameters:

list - list to which all used column expressions must be added

addSQL

public void addSQL(DBSQLBuilder sql,
                   long context)

Description copied from class: DBExpr

Used to build the SQL command. SQL for this expression must be appended to StringBuilder.

Specified by:

addSQL in class DBExpr

Parameters:

sql - the string buffer used to build the sql command

context - context flag for this SQL-Command (see CTX_??? constants).