Deveel.Data.Sql.Expressions.SelectColumn Class Reference

Represents a column selected to be in the output of a select statement. More...

Inheritance diagram for Deveel.Data.Sql.Expressions.SelectColumn:

Public Member Functions
	SelectColumn (SqlExpression expression, string alias)
	Constructs a new SelectColumn for the given expression and aliased with the given name. More...
	SelectColumn (SqlExpression expression)
	Constructs a new SelectColumn for the given expression. More...

Static Public Member Functions
static SelectColumn	Glob (string glob)
	Creates a special SelectColumn that is used to select all the columns in a table. More...

Properties
SqlExpression	Expression [get, private set]
	Gets the expression used to select the column. More...
string	Alias [get, private set]
	Gets the name used to alias the select expression. More...
bool	IsGlob [get]
bool	IsAll [get]
ObjectName	TableName [get]
ObjectName	ReferenceName [get]
ObjectName	InternalName [get, set]
	The name of this column used internally to reference it. More...
ObjectName	ResolvedName [get, set]
	The fully resolved name that this column is given in the resulting table. More...

Private Member Functions
	SelectColumn (ObjectData data)
void ISerializable.	GetData (SerializeData data)
object IPreparable.	Prepare (IExpressionPreparer preparer)
	Converts the underlying value of this instance into an object that can be evaluated by an expression. More...

Detailed Description

Represents a column selected to be in the output of a select statement.

This includes being either an aggregate function, a column or "*" which is the entire set of columns.

Definition at line 31 of file SelectColumn.cs.

Constructor & Destructor Documentation

Deveel.Data.Sql.Expressions.SelectColumn.SelectColumn ( SqlExpression  expression, string  alias  )

inline

Constructs a new SelectColumn for the given expression and aliased with the given name.

Parameters

expression	The Expression used for select a column within a SELECT statement.
alias	The name to alias the resulted expression.

Definition at line 39 of file SelectColumn.cs.

                                                                    {
            if (expression == null)
                throw new ArgumentNullException("expression");

            Expression = expression;
            Alias = alias;
        }

Deveel.Data.Sql.Expressions.SelectColumn.SelectColumn ( SqlExpression  expression )

inline

Constructs a new SelectColumn for the given expression.

Parameters

expression

The Expression used for select a column within a SELECT statement.

Definition at line 53 of file SelectColumn.cs.

            : this(expression, null) {
        }

Deveel.Data.Sql.Expressions.SelectColumn.SelectColumn ( ObjectData  data )

inlineprivate

Definition at line 57 of file SelectColumn.cs.

                                              {
            Expression = data.GetValue<SqlExpression>("Expression");
            Alias = data.GetString("Alias");
        }

Member Function Documentation

void ISerializable. Deveel.Data.Sql.Expressions.SelectColumn.GetData ( SerializeData  data )

inlineprivate

Implements Deveel.Data.Serialization.ISerializable.

Definition at line 117 of file SelectColumn.cs.

                                                       {
            data.SetValue("Expression", Expression);
            data.SetValue("Alias", Alias);
        }

static SelectColumn Deveel.Data.Sql.Expressions.SelectColumn.Glob ( string  glob )

inlinestatic

Creates a special SelectColumn that is used to select all the columns in a table.

Parameters

glob	The glob name for the column, which can be a simple asterisk (*) or prefixed by a table name (eg. Table.*).

Returns

Returns an instance of SelectColumn that is specially used for selecting all the columns from a table.

Definition at line 142 of file SelectColumn.cs.

                                                     {
            return new SelectColumn(SqlExpression.Reference(ObjectName.Parse(glob)));
        }

object IPreparable. Deveel.Data.Sql.Expressions.SelectColumn.Prepare ( IExpressionPreparer  preparer )

inlineprivate

Converts the underlying value of this instance into an object that can be evaluated by an expression.

Implements Deveel.Data.Sql.Expressions.IPreparable.

Definition at line 123 of file SelectColumn.cs.

                                                                 {
            var exp = Expression;
            if (exp != null) {
                exp = exp.Prepare(preparer);
            }

            return new SelectColumn(exp, Alias);
        }

Property Documentation

string Deveel.Data.Sql.Expressions.SelectColumn.Alias

getprivate set

Gets the name used to alias the select expression.

Definition at line 70 of file SelectColumn.cs.

SqlExpression Deveel.Data.Sql.Expressions.SelectColumn.Expression

getprivate set

Gets the expression used to select the column.

Definition at line 65 of file SelectColumn.cs.

ObjectName Deveel.Data.Sql.Expressions.SelectColumn.InternalName

getsetpackage

The name of this column used internally to reference it.

Definition at line 110 of file SelectColumn.cs.

bool Deveel.Data.Sql.Expressions.SelectColumn.IsAll

get

Definition at line 79 of file SelectColumn.cs.

bool Deveel.Data.Sql.Expressions.SelectColumn.IsGlob

get

Definition at line 72 of file SelectColumn.cs.

ObjectName Deveel.Data.Sql.Expressions.SelectColumn.ReferenceName

get

Definition at line 97 of file SelectColumn.cs.

ObjectName Deveel.Data.Sql.Expressions.SelectColumn.ResolvedName

getsetpackage

The fully resolved name that this column is given in the resulting table.

Definition at line 115 of file SelectColumn.cs.

ObjectName Deveel.Data.Sql.Expressions.SelectColumn.TableName

get

Definition at line 87 of file SelectColumn.cs.

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The documentation for this class was generated from the following file:

• /var/calculate/remote/distfiles/egit-src/deveeldb.git/src/deveeldb/Deveel.Data.Sql.Expressions/SelectColumn.cs