ru.curs.celesta.score

Class Expr

java.lang.Object

ru.curs.celesta.score.Expr

Direct Known Subclasses:

BinaryTermOp, Count, FieldRef, LogicValuedExpr, Max, Min, ParameterRef, Sum

public abstract class Expr
extends Object

Scalar SQL expression.

Constructor Summary

Constructors

Constructor and Description
Expr()

Method Summary

Modifier and Type	Method and Description
String	getCSQL() Returns a Celesta-SQL view of the expression.
abstract ViewColumnMeta<?>	getMeta() Returns the expression type.
String	getSQL(QueryBuildingHelper dba) Returns an SQL view of the expression in dialect of current DB.
void	resolveFieldRefs(GrainElement ge) Resolves references to the fields of tables using the context of current object of the score.

Methods inherited from class java.lang.Object

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

Constructor Detail

Expr

public Expr()

Method Detail

getCSQL

public final String getCSQL()

Returns a Celesta-SQL view of the expression.

Returns:

getSQL

public final String getSQL(QueryBuildingHelper dba)

Returns an SQL view of the expression in dialect of current DB.

Parameters:

dba - DB adapter.

Returns:

getMeta

public abstract ViewColumnMeta<?> getMeta()

Returns the expression type.

Returns:

resolveFieldRefs

public final void resolveFieldRefs(GrainElement ge)
                            throws ParseException

Resolves references to the fields of tables using the context of current object of the score.

Parameters:

ge - table or view

Throws:

ParseException - in case if a reference can't be resolved