RemObjects.DataAbstract.Expressions

Classes

Class	Notes
BetweenExpression	The BetweenExpression is derived from the WhereExpression class and represents expression that checks belonging to a range of values.
BinaryExpression	The BinaryExpression class is derived from the WhereExpression class and represents logical operations like And, Or, Greater Than etc.
ConstantExpression	Represents constant values to be used in WhereExpressions.
DateTimeNowExpression	The DateTimeNowExpression class represents the current database server date and time in Dynamic Where expressions.
DateTimePartExpression	The DateTimePartExpression class represents a call to the SQL function that extracts a part of given date like year, month etc in Dynamic Where expressions.
DateTimeTodayExpression	The DateTimeTodayExpression class represents the current database server date in Dynamic Where expressions.
FieldExpression	This class is used to represent data table fields in Dynamic Where expressions. For example, see how the database field ID is represented in the SQL query WHERE clause and in the equal Dynamic Where expression:
FunctionCallExpression
ListExpression	The ListExpression class represents the collection of WhereExpression objects.
MacroExpression	Instances of the MacroExpression class can be used to represent direct calls to the SQL function of the underlying database server.
NullExpression	The NullExpression Class is derived from the WhereExpression class and represents a NULL value to be used as WhereExpression node.
ParameterExpression	This class is used to represent parameters in Dynamic Where expressions.
UnaryExpression	The UnaryExpression class is derived from the WhereExpression class and contains one operand (an expression) and a unary operator.
WhereExpression	The base abstract class for classes that represent WHERE expression tree nodes:
WhereValidator	Checks WhereExpressions for errors. The main purpose of this class is to scan all objects of WhereExpession trees and to make sure that it contains valid field names.
WhereVisitor	This class represents the implementation of Visitor patterns and sets the strategy of traversal for the WhereExpression tree.

Enums

Enum	Notes
BinaryOperator	The BinaryOperator enumeration denotes the binary operator applied to operands of a BinaryExpression expression.
DateTimePart	Parts of date and time that can be specified in DateTimePartExpression
FunctionKind
UnaryOperator	The UnaryOperator enumeration denotes the unary operator applied to operand of a UnaryExpression expression. The UnaryOperator enumeration is widely used when Dynamic Where expressions are created in code.
WhereKind	The WhereKind enumeration represents kind of the Dynamic Where expression. This improves performane of the Dynamic Where processor on the server side because accessing the value of the WhereKind type allows to determine exact kind of a Dynamic Where expression without severall attempts to cast it to concrete expression type.