ExpressionProcessor: additional cast to date/time in case of SQLite

Author: alex-kulakov

Orm/Xtensive.Orm/Orm/Providers/Expressions/ExpressionProcessor.Helpers.cs

@@ -215,6 +215,14 @@ private static bool IsBooleanExpression(Expression expression) =>
 
     private static bool IsDateTimeExpression(Expression expression) =>
       IsExpressionOf(expression, WellKnownTypes.DateTime);
+#if NET6_0_OR_GREATER //DO_DATEONLY
+
+    private static bool IsDateOnlyExpression(Expression expression) =>
+      IsExpressionOf(expression, WellKnownTypes.DateOnly);
+
+    private static bool IsTimeOnlyExpression(Expression expression) =>
+      IsExpressionOf(expression, WellKnownTypes.TimeOnly);
+#endif
 
     private static bool IsDateTimeOffsetExpression(Expression expression) =>
       IsExpressionOf(expression, WellKnownTypes.DateTimeOffset);

Orm/Xtensive.Orm/Orm/Providers/Expressions/ExpressionProcessor.cs

@@ -217,10 +217,21 @@ protected override SqlExpression VisitBinary(BinaryExpression expression)
       if (dateTimeEmulation
           && left.NodeType != SqlNodeType.Null
           && right.NodeType != SqlNodeType.Null
-          && IsComparisonExpression(expression)
-          && (IsDateTimeExpression(expression.Left) || IsDateTimeExpression(expression.Right))) {
-        left = SqlDml.Cast(left, SqlType.DateTime);
-        right = SqlDml.Cast(right, SqlType.DateTime);
+          && IsComparisonExpression(expression)) {
+        if (IsDateTimeExpression(expression.Left) || IsDateTimeExpression(expression.Right)) {
+          left = SqlDml.Cast(left, SqlType.DateTime);
+          right = SqlDml.Cast(right, SqlType.DateTime);
+        }
+#if NET6_0_OR_GREATER
+        else if (IsDateOnlyExpression(expression.Left) || IsDateOnlyExpression(expression.Right)) {
+          left = SqlDml.Cast(left, SqlType.Date);
+          right = SqlDml.Cast(right, SqlType.Date);
+        }
+        else if (IsTimeOnlyExpression(expression.Left) || IsDateOnlyExpression(expression.Right)) {
+          left = SqlDml.Cast(left, SqlType.Time);
+          right = SqlDml.Cast(right, SqlType.Time);
+        }
+#endif
       }
 
       //handle SQLite DateTimeOffset comparsion