Ignore empty schema string. Fixes #72. (original pull request: #75).

Author: superfuego

src/EntityFramework6.Npgsql/SqlGenerators/SqlBaseGenerator.cs

@@ -553,12 +553,27 @@ public override VisitedExpression Visit([NotNull] DbScanExpression expression)
             ScanExpression scan;
             var overrideSchema = "http://schemas.microsoft.com/ado/2007/12/edm/EntityStoreSchemaGenerator:Schema";
             if (expression.Target.MetadataProperties.TryGetValue(overrideSchema, false, out metadata) && metadata.Value != null)
-                scan = new ScanExpression(QuoteIdentifier(metadata.Value.ToString()) + "." + QuoteIdentifier(tableName), expression.Target);
+            {
+                var schema = metadata.Value.ToString();
+                scan = string.IsNullOrEmpty(schema)
+                    ? new ScanExpression(QuoteIdentifier(tableName), expression.Target)
+                    : new ScanExpression(QuoteIdentifier(schema) + "." + QuoteIdentifier(tableName), expression.Target);
+            }
             else if (expression.Target.MetadataProperties.TryGetValue("Schema", false, out metadata) && metadata.Value != null)
-                scan = new ScanExpression(QuoteIdentifier(metadata.Value.ToString()) + "." + QuoteIdentifier(tableName), expression.Target);
+            {
+                var schema = metadata.Value.ToString();
+                scan = string.IsNullOrEmpty(schema)
+                    ? new ScanExpression(QuoteIdentifier(tableName), expression.Target)
+                    : new ScanExpression(QuoteIdentifier(schema) + "." + QuoteIdentifier(tableName), expression.Target);
+            }
             else
-                scan = new ScanExpression(QuoteIdentifier(expression.Target.EntityContainer.Name) + "." + QuoteIdentifier(tableName), expression.Target);
-
+            {
+                var schema = expression.Target.EntityContainer.Name;
+                scan = string.IsNullOrEmpty(schema)
+                    ? new ScanExpression(QuoteIdentifier(tableName), expression.Target)
+                    : new ScanExpression(QuoteIdentifier(schema) + "." + QuoteIdentifier(tableName), expression.Target);
+            }
+            
             return scan;
         }
 

test/EntityFramework6.Npgsql.Tests/EntityFrameworkBasicTests.cs

@@ -82,6 +82,27 @@ public void InsertAndSelect()
             }
         }
 
+        [Test]
+        public void InsertAndSelectSchemaless()
+        {
+            using (var context = new BloggingContext(ConnectionString))
+            {
+                context.Database.Delete();
+                context.Database.Create();
+            }
+
+            using (var context = new BloggingContext(ConnectionString))
+            {
+                context.NoColumnsEntities.Add(new NoColumnsEntity());
+                context.SaveChanges();
+            }
+
+            using (var context = new BloggingContext(ConnectionString))
+            {
+                Assert.AreEqual(1, context.NoColumnsEntities.Count());
+            }
+        }
+
         [Test]
         public void SelectWithWhere()
         {
@@ -621,8 +642,8 @@ public void TestScalarValuedStoredFunctions()
                 CollectionAssert.AreEqual(localChangedIds, remoteChangedIds);
             }
         }
-		
-		[Test]
+        
+        [Test]
         public void TestScalarValuedStoredFunctions_with_null_StoreFunctionName()
         {
             using (var context = new BloggingContext(ConnectionString))