public static LogicalBinaryExpression NotIn(string fieldName, params object[] value)
{
if (value == null)
{
return(IsNotNull(fieldName));
}
return(NotIn(SqlExpression.Field(fieldName), new CollectionExpression(value.Select(x => Constant(x)))));
}
public Queryable <T> Select(params Expression <Func <T, object> >[] fields)
{
foreach (var field in fields)
{
Fields.Add(SqlExpression.Field(field));
}
return(this);
}
public static LogicalBinaryExpression NotEqual(string fieldName, object value)
{
if (value == null)
{
return(IsNotNull(fieldName));
}
return(NotEqual(SqlExpression.Field(fieldName), SqlExpression.Constant(value)));
}
public Queryable <T> GroupBy(Expression <Func <T, object> > field, LogicalBinaryExpression having)
{
Groups.Add(SqlExpression.Field(field));
if (having != null)
{
_having = SqlExpression.AndAlso(_having, having);
}
return(this);
}
public override string OutputSqlString(ISqlBuilder builder, ParameterCollection output)
{
if (_fields == null || _fields.Count == 0)
{
Fields.AddRang(accessor.MetaInfo.GetPropertyNames().Select(x => SqlExpression.Field(x)));
}
var topExpressions = top > 0 ? builder.Constant(top) : string.Empty;
var fieldExpressions = Fields.OutputSqlString(builder, output);
var tableExpression = builder.BuildTableName(accessor.MetaInfo.Name);
var conditionExpressions = _where != null?_where.OutputSqlString(builder, output) : string.Empty;
var groupbyExpression = _groups != null && _groups.Count > 0 ? _groups.OutputSqlString(builder, output) : string.Empty;
var havingExpression = _groups != null && _groups.Count > 0 && _having != null?_having.OutputSqlString(builder, output) : string.Empty;
var orderbyExpression = _orders != null && _orders.Count > 0 ? string.Join(",", _orders.Select(x => string.Concat(x.Key.OutputSqlString(builder, output), " ", x.Value ? "DESC" : "ASC"))) : string.Empty;
if (startIndex < 0)
{
return(builder.QueryFormat(
topExpressions, //top(10)
fieldExpressions, //id,name,...
tableExpression, //tableName
conditionExpressions, //where id>1 and...
groupbyExpression, //group by name....
havingExpression, //having count(name)>1 ...
orderbyExpression, //order id
distinct ? Options | SqlOptions.Distinct : Options
));
}
else
{
return(builder.QueryFormat(
fieldExpressions, //id,name,...
tableExpression, //tableName
conditionExpressions, //where id>1 and...
groupbyExpression, //group by name....
havingExpression, //having count(name)>1 ...
orderbyExpression, //order id
startIndex,
rowCount,
distinct ? Options | SqlOptions.Distinct : Options
));
}
}
public Queryable <T> Sum(Expression <Func <T, object> > field, string alias)
{
Fields.Add(SqlExpression.Alias(SqlExpression.Function("SUM", SqlExpression.Field(field)), alias));
return(this);
}
public Queryable <T> Select(Expression <Func <T, object> > field, string alias)
{
Fields.Add(SqlExpression.Field(field, alias));
return(this);
}
public Queryable <T> OrderBy(Expression <Func <T, object> > field, bool descending)
{
return(OrderBy(SqlExpression.Field(field), descending));
}
public Queryable <T> GroupBy(params Expression <Func <T, object> >[] fields)
{
Groups.AddRang(fields.Select(x => SqlExpression.Field(x)));
return(this);
}
public Queryable <T> GroupBy(Expression <Func <T, object> > field)
{
Groups.Add(SqlExpression.Field(field));
return(this);
}
public static LogicalBinaryExpression Like(string fieldName, object value, bool startWith, bool endWith)
{
return(Like(SqlExpression.Field(fieldName), SqlExpression.Constant(value), startWith, endWith));
}
public static LogicalBinaryExpression Between(string fieldName, object value1, object value2)
{
return(Between(SqlExpression.Field(fieldName), SqlExpression.Constant(value1), Constant(value2)));
}
public static LogicalBinaryExpression In(string fieldName, params object[] value)
{
return(In(SqlExpression.Field(fieldName), new CollectionExpression(value.Select(x => Constant(x)))));
}
public static LogicalBinaryExpression LessThanOrEqual(string fieldName, object value)
{
return(LessThanOrEqual(SqlExpression.Field(fieldName), SqlExpression.Constant(value)));
}
public static LogicalBinaryExpression GreaterThan(string fieldName, object value)
{
return(GreaterThan(SqlExpression.Field(fieldName), SqlExpression.Constant(value)));
}
public static LogicalBinaryExpression IsNotNull(string fieldName)
{
return(IsNotNull(SqlExpression.Field(fieldName)));
}
