Class CastQueryFunction

Function of casting the argument expression to the specified data type.

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

Constructors

CastQueryFunction(CastQueryFunction)

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

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

The CastQueryFunction function whose clone is being created.

CastQueryFunction(IQueryColumnExpressionConvertible, DBDataValueType)

Initializes a new CastQueryFunction instance with the specified column expression and target data type.

Declaration
public CastQueryFunction(IQueryColumnExpressionConvertible expression, DBDataValueType castType)
Parameters
Type Name Description
IQueryColumnExpressionConvertible expression

The column expression.
DBDataValueType castType

The target data type.
Exceptions
Type Condition
System.ArgumentNullException

If null is passed as the expression parameter.

CastQueryFunction(QueryColumnExpression, DBDataValueType)

Initializes a new CastQueryFunction instance with the specified column expression and target data type.

Declaration
public CastQueryFunction(QueryColumnExpression expression, DBDataValueType castType)
Parameters
Type Name Description
QueryColumnExpression expression

The column expression.
DBDataValueType castType

The target data type.

Properties

CastType

The target data type.

Declaration
public DBDataValueType CastType { get; set; }
Property Value
Type Description
DBDataValueType

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 CastQueryFunction instance.

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

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

Implements

System.ICloneable

Extension Methods