No support for PostgreSQL versions lower than 11

- merged functionality of previous drivers into 11, no inheritance needed

Author: alex-kulakov

Orm/Xtensive.Orm.PostgreSql/Sql.Drivers.PostgreSql/DriverFactory.cs

@@ -120,19 +120,12 @@ private static SqlDriver CreateDriverInstance(
         DefaultTimeZone = defaultTimeZone
       };
 
-      if (version.Major < 8 || (version.Major == 8 && version.Minor < 3)) {
-        throw new NotSupportedException(Strings.ExPostgreSqlBelow83IsNotSupported);
+      if (version.Major < 11) {
+        throw new NotSupportedException(Strings.ExPostgreSqlBelow11IsNotSupported);
       }
 
-      // We support 8.3, 8.4 and any 9.0+
-
       return version.Major switch {
-        8 when version.Minor == 3 => new v8_3.Driver(coreServerInfo, pgsqlServerInfo),
-        8 when version.Minor > 3  => new v8_4.Driver(coreServerInfo, pgsqlServerInfo),
-        9 when version.Minor == 0 => new v9_0.Driver(coreServerInfo, pgsqlServerInfo),
-        9 when version.Minor > 0 => new v9_1.Driver(coreServerInfo, pgsqlServerInfo),
-        10 => new v10_0.Driver(coreServerInfo, pgsqlServerInfo),
-        11 => new v10_0.Driver(coreServerInfo, pgsqlServerInfo),
+        11 => new v11_0.Driver(coreServerInfo, pgsqlServerInfo),
         _ => new v12_0.Driver(coreServerInfo, pgsqlServerInfo)
       };
     }

Orm/Xtensive.Orm.PostgreSql/Sql.Drivers.PostgreSql/PostgreSqlTypeMapper.cs

@@ -51,5 +51,12 @@ protected PostgreSqlTypeMapper(string frameworkType, NpgsqlDbType npgsqlDbType,
       this.npgsqlDbType = npgsqlDbType;
       this.sqlType = sqlType;
     }
+
+    protected PostgreSqlTypeMapper(Type dotnetType, NpgsqlDbType npgsqlDbType, SqlType sqlType)
+    {
+      type = dotnetType;
+      this.npgsqlDbType = npgsqlDbType;
+      this.sqlType = sqlType;
+    }
   }
 }

Orm/Xtensive.Orm.PostgreSql/Sql.Drivers.PostgreSql/Resources/Strings.Designer.cs

@@ -1,4 +1,4 @@
-<?xml version="1.0" encoding="utf-8"?>
+<?xml version="1.0" encoding="utf-8"?>
 <root>
   <!-- 
     Microsoft ResX Schema 
@@ -117,8 +117,8 @@
   <resheader name="writer">
     <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089</value>
   </resheader>
-  <data name="ExPostgreSqlBelow83IsNotSupported" xml:space="preserve">
-    <value>PostgreSQL below 8.3 is not supported.</value>
+  <data name="ExPostgreSqlBelow11IsNotSupported" xml:space="preserve">
+    <value>PostgreSQL below 11 is not supported.</value>
   </data>
   <data name="ExUrlContainsInvalidXSpecificationXHasToBeY" xml:space="preserve">
     <value>URL contains invalid {0} specification. {0} has to be {1}.</value>

Orm/Xtensive.Orm.PostgreSql/Sql.Drivers.PostgreSql/Resources/Strings.resx

@@ -0,0 +1,21 @@
+// Copyright (C) 2014-2020 Xtensive LLC.
+// This code is distributed under MIT license terms.
+// See the License.txt file in the project root for more information.
+// Created by: Alena Mikshina
+// Created:    2014.04.10
+
+using NpgsqlTypes;
+using Xtensive.Reflection.PostgreSql;
+
+namespace Xtensive.Sql.Drivers.PostgreSql.v11_0
+{
+  internal sealed class BoxMapper : PostgreSqlTypeMapper
+  {
+    // Constructors
+
+    public BoxMapper()
+      : base(WellKnownTypes.NpgsqlBoxType, NpgsqlDbType.Box, CustomSqlType.Box)
+    {
+    }
+  }
+}

Orm/Xtensive.Orm.PostgreSql/Sql.Drivers.PostgreSql/v11_0/BoxMapper.cs

@@ -0,0 +1,21 @@
+// Copyright (C) 2014-2020 Xtensive LLC.
+// This code is distributed under MIT license terms.
+// See the License.txt file in the project root for more information.
+// Created by: Alena Mikshina
+// Created:    2014.04.10
+
+using NpgsqlTypes;
+using Xtensive.Reflection.PostgreSql;
+
+namespace Xtensive.Sql.Drivers.PostgreSql.v11_0
+{
+  internal sealed class CircleMapper : PostgreSqlTypeMapper
+  {
+    // Constructors
+
+    public CircleMapper()
+      : base(WellKnownTypes.NpgsqlCircleType, NpgsqlDbType.Circle, CustomSqlType.Circle)
+    {
+    }
+  }
+}