protected override Expression VisitCollection(CollectionExpression collection)
{
var newAlias = new Alias();
_map[collection.Alias] = newAlias;
return(new CollectionExpression(newAlias, collection.Database, collection.CollectionName, collection.DocumentType));
}
public Expression VisitCollection([NotNull] CollectionExpression collectionExpression)
{
Check.NotNull(collectionExpression, nameof(collectionExpression));
_bsonCommandBuilder.AddCollection(collectionExpression.Name, collectionExpression.EntityType);
return(collectionExpression);
}
public void AddCollection(string col, string alias)
{
var expr = new CollectionExpression {
Source = col, Target = alias
};
expr.SetParent(this);
_collections.Add(expr);
}
public void AddCollection(string col)
{
var expr = new CollectionExpression {
Source = col
};
expr.SetParent(this);
_collections.Add(expr);
}
protected virtual void VisitCollectionExpression(StringBuilder builder, CollectionExpression exp)
{
if (exp == null)
{
return;
}
StringBuilder sb = new StringBuilder();
sb.Append(string.Join(", ",
Enumerable.ToArray(EnumerableToParameterConverter(exp.Collection))));
if (sb.Length > 0)
{
builder.AppendFormat("({0})", sb);
}
}
public Expression VisitCollection(CollectionExpression collectionExpression)
{
_bsonCommandBuilder.AddCollection(collectionExpression.Name, collectionExpression.EntityType);
return(collectionExpression);
}
public AttributesCollectionExpression(CollectionExpression <PropertyNameExpression> attributesCollectionExpression)
: base("AttributesCollection", attributesCollectionExpression)
{
}
protected override QueryExpression VisitCollection(TContext context, CollectionExpression expression)
{
return(expression);
}
protected override Expression VisitCollection(CollectionExpression collection)
{
_aliases.Add(collection.Alias);
return(collection);
}
public void AddCollection(string col, string alias)
{
var expr = new CollectionExpression { Source = col, Target = alias };
expr.SetParent(this);
_collections.Add(expr);
}
public void AddCollection(string col)
{
var expr = new CollectionExpression { Source = col };
expr.SetParent(this);
_collections.Add(expr);
}
protected override Expression VisitCollection(QueryTranslatorContext context, CollectionExpression expression)
{
var properties = new Queue <PropertyInfo>(expression.Properties);
var accessor = Expression.MakeMemberAccess(context.Parameter, properties.Dequeue());
while (properties.Count > 0)
{
accessor = Expression.MakeMemberAccess(accessor, properties.Dequeue());
}
return(accessor);
}
public OrderByCollectionExpression(CollectionExpression <OrderByExpression> orderByCollectionExpression)
: base("OrderByCollection", orderByCollectionExpression)
{
}
protected abstract void VisitCollection(TContext context, CollectionExpression expression);
object IQueryExpressionVisitor <TContext, object> .VisitCollection(TContext context, CollectionExpression expression)
{
VisitCollection(context, expression);
return(null);
}
protected override DataTable BuildSchemaTable(Boolean withGeometryColumn)
{
DataTable dt = null;
using (NpgsqlConnection conn = new NpgsqlConnection(ConnectionString))
{
conn.Open();
CollectionExpression <PropertyNameExpression> attributes = null;
if (DefaultProviderProperties != null)
{
attributes = GetProviderPropertyValue
<AttributesCollectionExpression, CollectionExpression <PropertyNameExpression> >(
DefaultProviderProperties.ProviderProperties,
null);
}
string columns = attributes == null
?
"*"
:
string.Join(",", Enumerable.ToArray(Processor.Select(attributes,
delegate(
PropertyNameExpression
o)
{
return
(QualifyColumnName
(
o.
PropertyName));
})));
if (columns != "*")
{
if (!columns.Contains(QualifyColumnName(GeometryColumn)))
{
columns = string.Format("{0},{1}", QualifyColumnName(GeometryColumn), columns);
}
if (!columns.Contains(QualifyColumnName(OidColumn)))
{
columns = string.Format("{0},{1}", QualifyColumnName(OidColumn), columns);
}
}
using (
NpgsqlCommand cmd =
new NpgsqlCommand(string.Format("SELECT {0} FROM {1} LIMIT 1;", columns, QualifiedTableName),
conn))
{
NpgsqlDataAdapter da = new NpgsqlDataAdapter(cmd);
DataSet ds = new DataSet();
da.FillSchema(ds, SchemaType.Source);
dt = ds.Tables["Table"];
}
conn.Close();
}
if (!dt.Columns.Contains("oid") && HasOids)
{
dt.Columns.Add(new DataColumn("oid", typeof(Int64)));
DataColumn dc = dt.Columns["oid"];
dc.SetOrdinal(0);
if (dt.Constraints.Count == 0)
{
dt.Constraints.Add("PK", dt.Columns[0], true);
}
}
for (int i = 0; i < dt.Columns.Count; i++)
{
if (dt.Columns[i].ColumnName == GeometryColumn)
{
dt.Columns[i].DataType = typeof(Byte[]);
}
}
if (!withGeometryColumn)
{
dt.Columns.Remove(GeometryColumn);
}
//remove Primary Key to avoid possibliy mismatched PrimaryKey of FeatureDataTable
dt.PrimaryKey = null;
return(dt);
}
