Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.Entity/System/Data/Common/EntitySql/ParserOptions.cs

@@ -0,0 +1,63 @@
+//---------------------------------------------------------------------
+// <copyright file="ParserOptions.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//
+// @owner  [....]
+// @backupOwner [....]
+//---------------------------------------------------------------------
+
+namespace System.Data.Common.EntitySql
+{
+    using System;
+    using System.Globalization;
+  
+    /// <summary>
+    /// Represents eSQL compilation options.
+    /// </summary>
+    internal sealed class ParserOptions
+    {
+        internal enum CompilationMode
+        {
+            /// <summary>
+            /// Normal mode. Compiles eSQL command without restrictions.
+            /// Name resolution is case-insensitive (eSQL default).
+            /// </summary>
+            NormalMode,
+
+            /// <summary>
+            /// View generation mode: optimizes compilation process to ignore uncessary eSQL constructs:
+            ///     - GROUP BY, HAVING and ORDER BY clauses are ignored.
+            ///     - WITH RELATIONSHIP clause is allowed in type constructors.
+            ///     - Name resolution is case-sensitive.
+            /// </summary>
+            RestrictedViewGenerationMode,
+
+            /// <summary>
+            /// Same as CompilationMode.Normal plus WITH RELATIONSHIP clause is allowed in type constructors.
+            /// </summary>
+            UserViewGenerationMode
+        }
+
+        /// <summary>
+        /// Sets/Gets eSQL parser compilation mode.
+        /// </summary>
+        internal CompilationMode ParserCompilationMode;
+
+        internal StringComparer NameComparer
+        {
+            get
+            {
+                return this.NameComparisonCaseInsensitive ? StringComparer.OrdinalIgnoreCase : StringComparer.Ordinal;
+            }
+        }
+
+        internal bool NameComparisonCaseInsensitive
+        {
+            get
+            {
+                return this.ParserCompilationMode == CompilationMode.RestrictedViewGenerationMode ? false : true;
+            }
+        }
+    }
+}