Class SelectExpression

Expression, which represent SELECT query.

Inheritance
System.Object
System.Linq.Expressions.Expression
QueryExpression
SelectExpression
Namespace: Kros.KORM.Query.Expressions
Assembly: Kros.KORM.dll
Syntax
public class SelectExpression : QueryExpression

Constructors

SelectExpression(TableInfo)

Initializes a new instance of the SelectExpression class.

Declaration
public SelectExpression(TableInfo tableInfo)
Parameters
Type Name Description
TableInfo tableInfo

The table info.

Fields

SelectStatement

The select statement

Declaration
public const string SelectStatement = "SELECT"
Field Value
Type Description
System.String

Properties

ColumnsExpression

Gets the columns expression.

Declaration
public ColumnsExpression ColumnsExpression { get; }
Property Value
Type Description
ColumnsExpression

GroupByExpression

Gets or sets the group by expression.

Declaration
public GroupByExpression GroupByExpression { get; }
Property Value
Type Description
GroupByExpression

NodeType

Gets the node type of this System.Linq.Expressions.Expression.

Declaration
public override sealed ExpressionType NodeType { get; }
Property Value
Type Description
System.Linq.Expressions.ExpressionType
Overrides

OrderByExpression

Gets or sets the order by expression.

Declaration
public OrderByExpression OrderByExpression { get; }
Property Value
Type Description
OrderByExpression

TableExpression

Gets the table expression.

Declaration
public TableExpression TableExpression { get; }
Property Value
Type Description
TableExpression

Type

Gets the static type of the expression that this System.Linq.Expressions.Expression represents.

Declaration
public override Type Type { get; }
Property Value
Type Description
System.Type
Overrides

Value

Gets the value.

Declaration
public object Value { get; }
Property Value
Type Description
System.Object

WhereExpression

Gets or sets the where expression.

Declaration
public WhereExpression WhereExpression { get; }
Property Value
Type Description
WhereExpression

Methods

Accept(ExpressionVisitor)

Dispatches to the specific visit method for this node type. For example, System.Linq.Expressions.MethodCallExpression calls the System.Linq.Expressions.ExpressionVisitor.VisitMethodCall(System.Linq.Expressions.MethodCallExpression).

Declaration
protected override Expression Accept(ExpressionVisitor visitor)
Parameters
Type Name Description
System.Linq.Expressions.ExpressionVisitor visitor

The visitor to visit this node with.
Returns
Type Description
System.Linq.Expressions.Expression

The result of visiting this node.
Overrides
System.Linq.Expressions.Expression.Accept(System.Linq.Expressions.ExpressionVisitor)

SetColumnsExpression(ColumnsExpression)

Sets the columns expression.

Declaration
public void SetColumnsExpression(ColumnsExpression columnExpression)
Parameters
Type Name Description
ColumnsExpression columnExpression

The column expression.
Exceptions
Type Condition
System.ArgumentException

'columnExpression' can be applied only once.;columnsExpression

SetGroupByExpression(GroupByExpression)

Sets the group by expression.

Declaration
public void SetGroupByExpression(GroupByExpression groupByExpression)
Parameters
Type Name Description
GroupByExpression groupByExpression

The group by expression.
Exceptions
Type Condition
System.ArgumentException

'groupByExpression' can be applied only once.;groupByExpression

SetOrderByExpression(OrderByExpression)

Sets the order by expression.

Declaration
public void SetOrderByExpression(OrderByExpression orderByExpression)
Parameters
Type Name Description
OrderByExpression orderByExpression

The order by expression.
Exceptions
Type Condition
System.ArgumentException

'orderByExpression' can be applied only once.;orderByExpression

SetTableExpression(TableExpression)

Sets the table expression.

Declaration
public void SetTableExpression(TableExpression tableExpression)
Parameters
Type Name Description
TableExpression tableExpression

The table expression.
Exceptions
Type Condition
System.ArgumentException

'tableExpression' can be applied only once.;tableExpression

SetWhereExpression(WhereExpression)

Sets the where expression.

Declaration
public void SetWhereExpression(WhereExpression whereExpression)
Parameters
Type Name Description
WhereExpression whereExpression

The where expression.
Remarks

If you call this method multiple times, the conditions are merged via AND.

VisitChildren(ExpressionVisitor)

Reduces the node and then calls the visitor delegate on the reduced expression. The method throws an exception if the node is not reducible.

Declaration
protected override Expression VisitChildren(ExpressionVisitor visitor)
Parameters
Type Name Description
System.Linq.Expressions.ExpressionVisitor visitor

An instance of System.Func<T, TResult>.
Returns
Type Description
System.Linq.Expressions.Expression

The expression being visited, or an expression which should replace it in the tree.
Overrides
System.Linq.Expressions.Expression.VisitChildren(System.Linq.Expressions.ExpressionVisitor)

See Also