Class LengthQueryFunction

Function for returning the length of expression.

Inheritance
System.Object
QueryFunction
LengthQueryFunction
Inherited Members
System.Object.ToString()
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
Namespace: Terrasoft.Core.DB
Assembly: Terrasoft.Core.dll
Syntax
public class LengthQueryFunction : QueryFunction, IQueryColumnExpressionConvertible, IQueryColumnExpressionsCollector, ICloneable
Remarks

The length is measured in units that fit the type of the expression data.

Constructors

LengthQueryFunction()

Initializes a new LengthQueryFunction instance.

Declaration
public LengthQueryFunction()

LengthQueryFunction(IQueryColumnExpressionConvertible)

Initializes a new LengthQueryFunction instance for the specified column expression.

Declaration
public LengthQueryFunction(IQueryColumnExpressionConvertible expression)
Parameters
Type Name Description
IQueryColumnExpressionConvertible expression

The query column expression.
Exceptions
Type Condition
System.ArgumentNullException

If null is passed as the expression parameter.

LengthQueryFunction(LengthQueryFunction)

Initializes a new LengthQueryFunction instance that is a clone of the passed-in function.

Declaration
public LengthQueryFunction(LengthQueryFunction source)
Parameters
Type Name Description
LengthQueryFunction source

The LengthQueryFunction function whose clone is being created.

LengthQueryFunction(QueryColumnExpression)

Initializes a new LengthQueryFunction instance for the specified column expression.

Declaration
public LengthQueryFunction(QueryColumnExpression expression)
Parameters
Type Name Description
QueryColumnExpression expression

The query column expression.

Properties

Expression

The expression of the function argument.

Declaration
public QueryColumnExpression Expression { get; set; }
Property Value
Type Description
QueryColumnExpression

Methods

AddQueryColumnExpressions(QueryColumnExpressionCollection)

Declaration
protected override void AddQueryColumnExpressions(QueryColumnExpressionCollection collection)
Parameters
Type Name Description
QueryColumnExpressionCollection collection
Overrides

AddUsingParameters(QueryParameterCollection)

In the function arguments adds the passed-in collection of parameters.

Declaration
public override void AddUsingParameters(QueryParameterCollection resultParameters)
Parameters
Type Name Description
QueryParameterCollection resultParameters

Collection of the query parameters.
Overrides

BuildSqlText(StringBuilder, DBEngine)

Generates the query text, using the specified System.Text.StringBuilder instance and the DBEngine query builder.

Declaration
public override void BuildSqlText(StringBuilder sb, DBEngine dbEngine)
Parameters
Type Name Description
System.Text.StringBuilder sb

The System.Text.StringBuilder instance used to create query text.
DBEngine dbEngine

The instance of the builder of the database queries.
Overrides

Clone()

Creates the clone of the current LengthQueryFunction instance.

Declaration
public override object Clone()
Returns
Type Description
System.Object

A new LengthQueryFunction instance that is a clone of the current instance.
Overrides

Implements

System.ICloneable

Extension Methods