Class DataLengthQueryFunction

Function for calculating the bytes used to represent the expression of column with passed name.

Inheritance
System.Object
QueryFunction
DataLengthQueryFunction
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 DataLengthQueryFunction : QueryFunction, IQueryColumnExpressionConvertible, IQueryColumnExpressionsCollector, ICloneable

Constructors

DataLengthQueryFunction()

Initializes a new DataLengthQueryFunction instance.

Declaration
public DataLengthQueryFunction()

DataLengthQueryFunction(DataLengthQueryFunction)

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

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

The DataLengthQueryFunction function whose clone is being created.

DataLengthQueryFunction(IQueryColumnExpressionConvertible)

Initializes a new DataLengthQueryFunction instance for the specified column expression.

Declaration
public DataLengthQueryFunction(IQueryColumnExpressionConvertible columnNameExpression)
Parameters
Type Name Description
IQueryColumnExpressionConvertible columnNameExpression

The query column expression.
Exceptions
Type Condition
System.ArgumentNullException

If null is passed as the columnNameExpression parameter.

DataLengthQueryFunction(QueryColumnExpression)

Initializes a new DataLengthQueryFunction instance for the specified column expression.

Declaration
public DataLengthQueryFunction(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 DataLengthQueryFunction instance.

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

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

Implements

System.ICloneable

Extension Methods