protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
var sequence = parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery);
var defaultValue = methodCall.Arguments.Count == 1 ? null : methodCall.Arguments[1].Unwrap();
return new DefaultIfEmptyContext(sequence, defaultValue);
}
static void ParseSkip(ExpressionParser parser, IParseContext sequence, ISqlExpression prevSkipValue, ISqlExpression expr)
{
var sql = sequence.SqlQuery;
parser.SqlProvider.SqlQuery = sql;
sql.Select.Skip(expr);
parser.SqlProvider.SqlQuery = sql;
if (sql.Select.TakeValue != null)
{
if (parser.SqlProvider.IsSkipSupported || !parser.SqlProvider.IsTakeSupported)
sql.Select.Take(parser.Convert(
sequence,
new SqlBinaryExpression(typeof(int), sql.Select.TakeValue, "-", sql.Select.SkipValue, Precedence.Additive)));
if (prevSkipValue != null)
sql.Select.Skip(parser.Convert(
sequence,
new SqlBinaryExpression(typeof(int), prevSkipValue, "+", sql.Select.SkipValue, Precedence.Additive)));
}
if (!parser.SqlProvider.TakeAcceptsParameter)
{
var p = sql.Select.SkipValue as SqlParameter;
if (p != null)
p.IsQueryParameter = false;
}
}
protected override bool CanParseMethodCall(ExpressionParser parser, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
return
methodCall.IsQueryable("SelectMany") &&
methodCall.Arguments.Count == 3 &&
((LambdaExpression)methodCall.Arguments[1].Unwrap()).Parameters.Count == 1;
}
protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
var sequence = parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery);
var condition = (LambdaExpression)methodCall.Arguments[1].Unwrap();
var result = parser.ParseWhere(sequence, condition, true);
result.SetAlias(condition.Parameters[0].Name);
return result;
}
protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
var sequence = parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery);
var sql = sequence.SqlQuery;
if (sql.Select.TakeValue != null || sql.Select.SkipValue != null)
sequence = new SubQueryContext(sequence);
sequence.SqlQuery.Select.IsDistinct = true;
return sequence;
}
static void ParseTake(ExpressionParser parser, IParseContext sequence, ISqlExpression expr)
{
var sql = sequence.SqlQuery;
parser.SqlProvider.SqlQuery = sql;
sql.Select.Take(expr);
if (sql.Select.SkipValue != null && parser.SqlProvider.IsTakeSupported && !parser.SqlProvider.IsSkipSupported)
{
if (sql.Select.SkipValue is SqlParameter && sql.Select.TakeValue is SqlValue)
{
var skip = (SqlParameter)sql.Select.SkipValue;
var parm = (SqlParameter)sql.Select.SkipValue.Clone(new Dictionary<ICloneableElement,ICloneableElement>(), _ => true);
parm.SetTakeConverter((int)((SqlValue)sql.Select.TakeValue).Value);
sql.Select.Take(parm);
var ep = (from pm in parser.CurrentSqlParameters where pm.SqlParameter == skip select pm).First();
ep = new ParameterAccessor
{
Expression = ep.Expression,
Accessor = ep.Accessor,
SqlParameter = parm
};
parser.CurrentSqlParameters.Add(ep);
}
else
sql.Select.Take(parser.Convert(
sequence,
new SqlBinaryExpression(typeof(int), sql.Select.SkipValue, "+", sql.Select.TakeValue, Precedence.Additive)));
}
if (!parser.SqlProvider.TakeAcceptsParameter)
{
var p = sql.Select.TakeValue as SqlParameter;
if (p != null)
p.IsQueryParameter = false;
}
}
protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
var sequence = parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery);
if (sequence.SqlQuery.Select.TakeValue != null || sequence.SqlQuery.Select.SkipValue != null)
sequence = new SubQueryContext(sequence);
var lambda = (LambdaExpression)methodCall.Arguments[1].Unwrap();
var order = new PathThroughContext(sequence, lambda);
var body = lambda.Body.Unwrap();
var sql = parser.ParseExpressions(order, body, ConvertFlags.Key);
if (!methodCall.Method.Name.StartsWith("Then"))
sequence.SqlQuery.OrderBy.Items.Clear();
foreach (var expr in sql)
{
var e = expr.Sql;
if (e is SqlQuery.SearchCondition)
{
if (e.CanBeNull())
{
var notExpr = new SqlQuery.SearchCondition
{
Conditions = { new SqlQuery.Condition(true, new SqlQuery.Predicate.Expr(e, e.Precedence)) }
};
e = parser.Convert(sequence, new SqlFunction(e.SystemType, "CASE", e, new SqlValue(1), notExpr, new SqlValue(0), new SqlValue(null)));
}
else
e = parser.Convert(sequence, new SqlFunction(e.SystemType, "CASE", e, new SqlValue(1), new SqlValue(0)));
}
sequence.SqlQuery.OrderBy.Expr(e, methodCall.Method.Name.EndsWith("Descending"));
}
return sequence;
}
protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
var sequence = parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery);
var arg = methodCall.Arguments[1].Unwrap();
if (arg.NodeType == ExpressionType.Lambda)
arg = ((LambdaExpression)arg).Body.Unwrap();
var expr = parser.ParseExpression(sequence, arg);
if (methodCall.Method.Name == "Take")
{
ParseTake(parser, sequence, expr);
}
else
{
ParseSkip(parser, sequence, sequence.SqlQuery.Select.SkipValue, expr);
}
return sequence;
}
protected override bool CanParseMethodCall(ExpressionParser parser, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
if (!methodCall.IsQueryable("Join", "GroupJoin") || methodCall.Arguments.Count != 5)
return false;
var body = ((LambdaExpression)methodCall.Arguments[2].Unwrap()).Body.Unwrap();
if (body.NodeType == ExpressionType .MemberInit)
{
var mi = (MemberInitExpression)body;
bool throwExpr;
if (mi.NewExpression.Arguments.Count > 0 || mi.Bindings.Count == 0)
throwExpr = true;
else
throwExpr = mi.Bindings.Any(b => b.BindingType != MemberBindingType.Assignment);
if (throwExpr)
throw new NotSupportedException(string.Format("Explicit construction of entity type '{0}' in join is not allowed.", body.Type));
}
return true;
}
protected override bool CanParseMethodCall(ExpressionParser parser, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
return methodCall.IsQueryable("Skip", "Take");
}
protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
return parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery);
}
protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
var isGroup = methodCall.Method.Name == "GroupJoin";
var outerContext = parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery);
var innerContext = parser.ParseSequence(parent, methodCall.Arguments[1], new SqlQuery());
outerContext = new SubQueryContext(outerContext);
innerContext = new SubQueryContext(innerContext);
var join = innerContext.SqlQuery.InnerJoin();
var sql = new SqlQuery();
sql.From.Table(outerContext.SqlQuery, join);
var selector = (LambdaExpression)methodCall.Arguments[4].Unwrap();
outerContext.SetAlias(selector.Parameters[0].Name);
innerContext.SetAlias(selector.Parameters[1].Name);
var outerKeyLambda = ((LambdaExpression)methodCall.Arguments[2].Unwrap());
var innerKeyLambda = ((LambdaExpression)methodCall.Arguments[3].Unwrap());
var outerKeySelector = outerKeyLambda.Body.Unwrap();
var innerKeySelector = innerKeyLambda.Body.Unwrap();
var outerKeyContext = new PathThroughContext(outerContext, outerKeyLambda);
var innerKeyContext = new PathThroughContext(innerContext, innerKeyLambda);
if (outerKeySelector.NodeType == ExpressionType.New)
{
var new1 = (NewExpression)outerKeySelector;
var new2 = (NewExpression)innerKeySelector;
for (var i = 0; i < new1.Arguments.Count; i++)
{
var arg1 = new1.Arguments[i];
var arg2 = new2.Arguments[i];
var predicate = parser.ParseObjectComparison(ExpressionType.Equal, outerKeyContext, arg1, innerKeyContext, arg2);
if (predicate != null)
join.JoinedTable.Condition.Conditions.Add(new SqlQuery.Condition(false, predicate));
else
join
.Expr(parser.ParseExpression(outerKeyContext, arg1)).Equal
.Expr(parser.ParseExpression(innerKeyContext, arg2));
}
}
else if (outerKeySelector.NodeType == ExpressionType.MemberInit)
{
var mi1 = (MemberInitExpression)outerKeySelector;
var mi2 = (MemberInitExpression)innerKeySelector;
for (var i = 0; i < mi1.Bindings.Count; i++)
{
if (mi1.Bindings[i].Member != mi2.Bindings[i].Member)
throw new LinqException(string.Format("List of member inits does not match for entity type '{0}'.", outerKeySelector.Type));
var arg1 = ((MemberAssignment)mi1.Bindings[i]).Expression;
var arg2 = ((MemberAssignment)mi2.Bindings[i]).Expression;
var predicate = parser.ParseObjectComparison(ExpressionType.Equal, outerKeyContext, arg1, innerKeyContext, arg2);
if (predicate != null)
join.JoinedTable.Condition.Conditions.Add(new SqlQuery.Condition(false, predicate));
else
join
.Expr(parser.ParseExpression(outerKeyContext, arg1)).Equal
.Expr(parser.ParseExpression(innerKeyContext, arg2));
}
}
else
{
var predicate = parser.ParseObjectComparison(
ExpressionType.Equal,
outerKeyContext, outerKeySelector,
innerKeyContext, innerKeySelector);
if (predicate != null)
join.JoinedTable.Condition.Conditions.Add(new SqlQuery.Condition(false, predicate));
else
join
.Expr(parser.ParseExpression(outerKeyContext, outerKeySelector)).Equal
.Expr(parser.ParseExpression(innerKeyContext, innerKeySelector));
}
return isGroup ?
new GroupJoinContext(selector, outerContext, innerContext, sql) :
new JoinContext(selector, outerContext, innerContext, sql);
}
protected override bool CanParseMethodCall(ExpressionParser parser, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
return(methodCall.IsQueryable("Average", "Min", "Max", "Sum"));
}
protected abstract IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery);
public bool CanParse(ExpressionParser parser, Expression expression, SqlQuery sqlQuery)
{
return(Parse(parser, expression, sqlQuery, (n, _) => n > 0));
}
public bool CanParse(ExpressionParser parser, Expression expression, SqlQuery sqlQuery)
{
if (expression.NodeType == ExpressionType.Call)
return CanParseMethodCall(parser, (MethodCallExpression)expression, sqlQuery);
return false;
}
protected override bool CanParseMethodCall(ExpressionParser parser, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
return(methodCall.IsQueryable("Where"));
}
protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
var isGroup = methodCall.Method.Name == "GroupJoin";
var outerContext = parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery);
var innerContext = parser.ParseSequence(parent, methodCall.Arguments[1], new SqlQuery());
outerContext = new SubQueryContext(outerContext);
innerContext = new SubQueryContext(innerContext);
var join = innerContext.SqlQuery.InnerJoin();
var sql = new SqlQuery();
sql.From.Table(outerContext.SqlQuery, join);
var selector = (LambdaExpression)methodCall.Arguments[4].Unwrap();
outerContext.SetAlias(selector.Parameters[0].Name);
innerContext.SetAlias(selector.Parameters[1].Name);
var outerKeyLambda = ((LambdaExpression)methodCall.Arguments[2].Unwrap());
var innerKeyLambda = ((LambdaExpression)methodCall.Arguments[3].Unwrap());
var outerKeySelector = outerKeyLambda.Body.Unwrap();
var innerKeySelector = innerKeyLambda.Body.Unwrap();
var outerKeyContext = new PathThroughContext(outerContext, outerKeyLambda);
var innerKeyContext = new PathThroughContext(innerContext, innerKeyLambda);
if (outerKeySelector.NodeType == ExpressionType.New)
{
var new1 = (NewExpression)outerKeySelector;
var new2 = (NewExpression)innerKeySelector;
for (var i = 0; i < new1.Arguments.Count; i++)
{
var arg1 = new1.Arguments[i];
var arg2 = new2.Arguments[i];
var predicate = parser.ParseObjectComparison(ExpressionType.Equal, outerKeyContext, arg1, innerKeyContext, arg2);
if (predicate != null)
{
join.JoinedTable.Condition.Conditions.Add(new SqlQuery.Condition(false, predicate));
}
else
{
join
.Expr(parser.ParseExpression(outerKeyContext, arg1)).Equal
.Expr(parser.ParseExpression(innerKeyContext, arg2));
}
}
}
else if (outerKeySelector.NodeType == ExpressionType.MemberInit)
{
var mi1 = (MemberInitExpression)outerKeySelector;
var mi2 = (MemberInitExpression)innerKeySelector;
for (var i = 0; i < mi1.Bindings.Count; i++)
{
if (mi1.Bindings[i].Member != mi2.Bindings[i].Member)
{
throw new LinqException(string.Format("List of member inits does not match for entity type '{0}'.", outerKeySelector.Type));
}
var arg1 = ((MemberAssignment)mi1.Bindings[i]).Expression;
var arg2 = ((MemberAssignment)mi2.Bindings[i]).Expression;
var predicate = parser.ParseObjectComparison(ExpressionType.Equal, outerKeyContext, arg1, innerKeyContext, arg2);
if (predicate != null)
{
join.JoinedTable.Condition.Conditions.Add(new SqlQuery.Condition(false, predicate));
}
else
{
join
.Expr(parser.ParseExpression(outerKeyContext, arg1)).Equal
.Expr(parser.ParseExpression(innerKeyContext, arg2));
}
}
}
else
{
var predicate = parser.ParseObjectComparison(
ExpressionType.Equal,
outerKeyContext, outerKeySelector,
innerKeyContext, innerKeySelector);
if (predicate != null)
{
join.JoinedTable.Condition.Conditions.Add(new SqlQuery.Condition(false, predicate));
}
else
{
join
.Expr(parser.ParseExpression(outerKeyContext, outerKeySelector)).Equal
.Expr(parser.ParseExpression(innerKeyContext, innerKeySelector));
}
}
return(isGroup ?
new GroupJoinContext(selector, outerContext, innerContext, sql) :
new JoinContext(selector, outerContext, innerContext, sql));
}
protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
return(parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery));
}
public IParseContext ParseSequence(ExpressionParser parser, IParseContext parent, Expression expression, SqlQuery sqlQuery)
{
return(new ScalarSelectContext {
Parser = parser, Parent = parent, Expression = expression, SqlQuery = sqlQuery
});
}
public bool CanParse(ExpressionParser parser, Expression expression, SqlQuery sqlQuery)
{
return(expression.NodeType == ExpressionType.Lambda && ((LambdaExpression)expression).Parameters.Count == 0);
}
protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
var sequence = parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery);
var collectionSelector = (LambdaExpression)methodCall.Arguments[1].Unwrap();
var resultSelector = (LambdaExpression)methodCall.Arguments[2].Unwrap();
//if (collectionSelector.Parameters[0] == collectionSelector.Body.Unwrap())
//{
// return resultSelector == null ? sequence : new SelectContext(resultSelector, sequence, sequence);
//}
var context = new SelectManyContext(collectionSelector, sequence);
var expr = collectionSelector.Body.Unwrap();
var crossApply = null != expr.Find(e => e == collectionSelector.Parameters[0]);
/*
* if (expr.NodeType == ExpressionType.Call)
* {
* var call = (MethodCallExpression)collectionSelector.Body;
*
* if (call.IsQueryable("DefaultIfEmpty"))
* {
* leftJoin = true;
* expr = call.Arguments[0];
* }
* }
*/
parser.SubQueryParsingCounter++;
var collection = parser.ParseSequence(context, expr, new SqlQuery());
parser.SubQueryParsingCounter--;
var leftJoin = collection is DefaultIfEmptyParser.DefaultIfEmptyContext;
var sql = collection.SqlQuery;
if (!leftJoin && crossApply)
{
if (sql.GroupBy.IsEmpty &&
sql.Select.Columns.Count == 0 &&
!sql.Select.HasModifier &&
sql.Where.IsEmpty &&
!sql.HasUnion &&
sql.From.Tables.Count == 1)
{
crossApply = false;
}
}
if (!leftJoin && !crossApply)
{
sequence.SqlQuery.From.Table(sql);
//sql.ParentSql = sequence.SqlQuery;
var col = (IParseContext) new SubQueryContext(collection, sequence.SqlQuery, true);
return(new SelectContext(resultSelector, sequence, col));
}
//if (crossApply)
{
if (sql.GroupBy.IsEmpty &&
sql.Select.Columns.Count == 0 &&
!sql.Select.HasModifier &&
//!sql.Where.IsEmpty &&
!sql.HasUnion && sql.From.Tables.Count == 1)
{
var join = leftJoin ? SqlQuery.LeftJoin(sql) : SqlQuery.InnerJoin(sql);
join.JoinedTable.Condition.Conditions.AddRange(sql.Where.SearchCondition.Conditions);
sql.Where.SearchCondition.Conditions.Clear();
if (collection is TableParser.TableContext)
{
var collectionParent = collection.Parent as TableParser.TableContext;
if (collectionParent != null)
{
var ts = (SqlQuery.TableSource) new QueryVisitor().Find(sequence.SqlQuery.From, e =>
{
if (e.ElementType == QueryElementType.TableSource)
{
var t = (SqlQuery.TableSource)e;
return(t.Source == collectionParent.SqlTable);
}
return(false);
});
ts.Joins.Add(join.JoinedTable);
}
else
{
sequence.SqlQuery.From.Tables[0].Joins.Add(join.JoinedTable);
}
}
else
{
sequence.SqlQuery.From.Tables[0].Joins.Add(join.JoinedTable);
//collection.SqlQuery = sequence.SqlQuery;
}
//sql.ParentSql = sequence.SqlQuery;
var col = (IParseContext) new SubQueryContext(collection, sequence.SqlQuery, false);
return(new SelectContext(resultSelector, sequence, col));
}
}
throw new LinqException("Sequence '{0}' cannot be converted to SQL.", expr);
}
public IParseContext ParseSequence(ExpressionParser parser, IParseContext parent, Expression expression, SqlQuery sqlQuery)
{
if (expression.NodeType == ExpressionType.Call)
return ParseMethodCall(parser, parent, (MethodCallExpression)expression, sqlQuery);
return null;
}
protected override IParseContext ParseMethodCall(ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
var sequence = parser.ParseSequence(parent, methodCall.Arguments[0], sqlQuery);
var collectionSelector = (LambdaExpression)methodCall.Arguments[1].Unwrap();
var resultSelector = (LambdaExpression)methodCall.Arguments[2].Unwrap();
//if (collectionSelector.Parameters[0] == collectionSelector.Body.Unwrap())
//{
// return resultSelector == null ? sequence : new SelectContext(resultSelector, sequence, sequence);
//}
var context = new SelectManyContext(collectionSelector, sequence);
var expr = collectionSelector.Body.Unwrap();
var crossApply = null != expr.Find(e => e == collectionSelector.Parameters[0]);
/*
if (expr.NodeType == ExpressionType.Call)
{
var call = (MethodCallExpression)collectionSelector.Body;
if (call.IsQueryable("DefaultIfEmpty"))
{
leftJoin = true;
expr = call.Arguments[0];
}
}
*/
parser.SubQueryParsingCounter++;
var collection = parser.ParseSequence(context, expr, new SqlQuery());
parser.SubQueryParsingCounter--;
var leftJoin = collection is DefaultIfEmptyParser.DefaultIfEmptyContext;
var sql = collection.SqlQuery;
if (!leftJoin && crossApply)
{
if (sql.GroupBy.IsEmpty &&
sql.Select.Columns.Count == 0 &&
!sql.Select.HasModifier &&
sql.Where.IsEmpty &&
!sql.HasUnion &&
sql.From.Tables.Count == 1)
{
crossApply = false;
}
}
if (!leftJoin && !crossApply)
{
sequence.SqlQuery.From.Table(sql);
//sql.ParentSql = sequence.SqlQuery;
var col = (IParseContext)new SubQueryContext(collection, sequence.SqlQuery, true);
return new SelectContext(resultSelector, sequence, col);
}
//if (crossApply)
{
if (sql.GroupBy.IsEmpty &&
sql.Select.Columns.Count == 0 &&
!sql.Select.HasModifier &&
//!sql.Where.IsEmpty &&
!sql.HasUnion && sql.From.Tables.Count == 1)
{
var join = leftJoin ? SqlQuery.LeftJoin(sql) : SqlQuery.InnerJoin(sql);
join.JoinedTable.Condition.Conditions.AddRange(sql.Where.SearchCondition.Conditions);
sql.Where.SearchCondition.Conditions.Clear();
if (collection is TableParser.TableContext)
{
var collectionParent = collection.Parent as TableParser.TableContext;
if (collectionParent != null)
{
var ts = (SqlQuery.TableSource)new QueryVisitor().Find(sequence.SqlQuery.From, e =>
{
if (e.ElementType == QueryElementType.TableSource)
{
var t = (SqlQuery.TableSource)e;
return t.Source == collectionParent.SqlTable;
}
return false;
});
ts.Joins.Add(join.JoinedTable);
}
else
{
sequence.SqlQuery.From.Tables[0].Joins.Add(join.JoinedTable);
}
}
else
{
sequence.SqlQuery.From.Tables[0].Joins.Add(join.JoinedTable);
//collection.SqlQuery = sequence.SqlQuery;
}
//sql.ParentSql = sequence.SqlQuery;
var col = (IParseContext)new SubQueryContext(collection, sequence.SqlQuery, false);
return new SelectContext(resultSelector, sequence, col);
}
}
throw new LinqException("Sequence '{0}' cannot be converted to SQL.", expr);
}
protected TableContext(ExpressionParser parser, SqlQuery sqlQuery)
{
Parser = parser;
SqlQuery = sqlQuery;
}
protected override bool CanParseMethodCall(ExpressionParser parser, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
return methodCall.IsQueryable("DefaultIfEmpty");
}
protected abstract bool CanParseMethodCall(ExpressionParser parser, MethodCallExpression methodCall, SqlQuery sqlQuery);
protected abstract bool CanParseMethodCall(ExpressionParser parser, MethodCallExpression methodCall, SqlQuery sqlQuery);
protected override bool CanParseMethodCall(ExpressionParser parser, MethodCallExpression methodCall, SqlQuery sqlQuery)
{
return(methodCall.IsQueryable("First", "FirstOrDefault", "Single", "SingleOrDefault"));
}
protected abstract IParseContext ParseMethodCall (ExpressionParser parser, IParseContext parent, MethodCallExpression methodCall, SqlQuery sqlQuery);
