/// <summary>
/// 初始化 <see cref="OrderByExpressionVisitor"/> 类的新实例
/// </summary>
public OrderByExpressionVisitor(DbQueryProviderBase provider, TableAliasCache aliases, List <DbExpression> qOrder, DbExpression groupBy = null, string alias = null)
: base(provider, aliases, null, false)
{
_qOrder = qOrder;
_aliases = aliases;
_groupBy = groupBy;
_alias = alias;
}
/// <summary>
/// 初始化 <see cref="StatisExpressionVisitor"/> 类的新实例
/// </summary>
public StatisExpressionVisitor(DbQueryProviderBase provider, TableAliasCache aliases, DbExpression statis, DbExpression groupBy = null, string alias = null)
: base(provider, aliases, statis.Expressions != null ? statis.Expressions[0] : null, false)
{
_provider = provider;
_aliases = aliases;
_statis = statis;
_groupBy = groupBy;
_alias = alias;
}
/// <summary>
/// 初始化 <see cref="ExpressionVisitorBase"/> 类的新实例
/// </summary>
public ExpressionVisitorBase(DbQueryProviderBase provider, TableAliasCache aliases, Expression exp, bool useNominate = true)
{
_provider = provider;
_aliases = aliases;
_navigations = new Dictionary <string, MemberExpression>();
_expression = exp;
//var visitor = new PartialVisitor();
//_expression = useNominate ? visitor.Eval(exp) : exp;
}
/// <summary>
/// 初始化 <see cref="ColumnExpressionVisitor"/> 类的新实例
/// </summary>
public ColumnExpressionVisitor(DbQueryProviderBase provider, TableAliasCache aliases, DbExpression exp, DbExpression groupBy = null, bool mOnly = false)
: base(provider, aliases, exp.Expressions != null ? exp.Expressions[0] : null)
{
_provider = provider;
_aliases = aliases;
_groupBy = groupBy;
_mOnly = mOnly;
_columns = new Dictionary <string, Column>();
_navDescriptors = new ColumnNavDescriptorCollection();
_navDescriptorKeys = new List <string>(10);
}
/// <summary>
/// 初始化 <see cref="UpdateExpressionVisitor"/> 类的新实例
/// </summary>
public UpdateExpressionVisitor(DbQueryProviderBase provider, TableAliasCache aliases, Expression exp)
: base(provider, aliases, exp)
{
_provider = provider;
_aliases = aliases;
}
/// <summary>
/// 初始化 <see cref="GroupByExpressionVisitor"/> 类的新实例
/// </summary>
public GroupByExpressionVisitor(DbQueryProviderBase provider, TableAliasCache aliases, DbExpression groupBy)
: base(provider, aliases, groupBy != null ? groupBy.Expressions[0] : null, false)
{
}
/// <summary>
/// 初始化 <see cref="WhereExpressionVisitor"/> 类的新实例
/// </summary>
public WhereExpressionVisitor(DbQueryProviderBase provider, TableAliasCache aliases, DbExpression exp)
: base(provider, aliases, exp.Expressions != null ? exp.Expressions[0] : null)
{
_expression = base.Expression;
}
/// <summary>
/// 初始化 <see cref="HavingExpressionVisitor"/> 类的新实例
/// </summary>
public HavingExpressionVisitor(DbQueryProviderBase provider, TableAliasCache aliases, DbExpression having, DbExpression groupBy)
: base(provider, aliases, having.Expressions != null ? having.Expressions[0] : null)
{
_groupBy = groupBy;
_aliases = aliases;
}
/// <summary>
/// 初始化 <see cref="JoinExpressionVisitor"/> 类的新实例
/// </summary>
public JoinExpressionVisitor(DbQueryProviderBase provider, TableAliasCache aliases, List <DbExpression> qJoin)
: base(provider, aliases, null, false)
{
_qJoin = qJoin;
_aliases = aliases;
}
