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Connected.Framework/Connected.Expressions/Expressions/SelectExpression.cs

46 lines
1.8 KiB

using Connected.Expressions.Collections;
using Connected.Expressions.Formatters;
using Connected.Expressions.Translation;
using System.Collections.ObjectModel;
using System.Linq.Expressions;
namespace Connected.Expressions;
public sealed class SelectExpression : AliasedExpression
{
public SelectExpression(Alias alias, IEnumerable<ColumnDeclaration> columns, Expression from, Expression? where,
IEnumerable<OrderExpression>? orderBy, IEnumerable<Expression>? groupBy, bool isDistinct, Expression? skip, Expression? take, bool isReverse)
: base(DatabaseExpressionType.Select, typeof(void), alias)
{
Columns = columns.ToReadOnly();
IsDistinct = isDistinct;
From = from;
Where = where;
OrderBy = orderBy?.ToReadOnly();
GroupBy = groupBy?.ToReadOnly();
Take = take;
Skip = skip;
IsReverse = isReverse;
}
public SelectExpression(Alias alias, IEnumerable<ColumnDeclaration> columns, Expression from, Expression? where, IEnumerable<OrderExpression>? orderBy, IEnumerable<Expression>? groupBy)
: this(alias, columns, from, where, orderBy, groupBy, false, null, null, false)
{
}
public SelectExpression(Alias alias, IEnumerable<ColumnDeclaration> columns, Expression from, Expression? where)
: this(alias, columns, from, where, null, null)
{
}
public ReadOnlyCollection<ColumnDeclaration> Columns { get; }
public Expression From { get; }
public Expression? Where { get; }
public ReadOnlyCollection<OrderExpression>? OrderBy { get; }
public ReadOnlyCollection<Expression>? GroupBy { get; }
public bool IsDistinct { get; }
public Expression? Skip { get; }
public Expression? Take { get; }
public bool IsReverse { get; }
public string QueryText => SqlFormatter.Format(this);
}