覆盖索引包括列postgresql和ef core

Question

我正在将实体框架核心用于SQL Server和PostgreSQL。

我需要用包含列覆盖创建索引。

我使用NpgsqlMigrationsAnnotationProvider和NpgsqlMigrationsSqlGenerator来做到这一点。

我的代码是

NpgsqlMigrationsSqlGenerator

生成函数：

        base.Generate(operation, model, builder, false);
        System.Diagnostics.Debugger.Launch();
        var includeIndexAnnotation = operation.FindAnnotation("IncludeIndex");

        if (includeIndexAnnotation != null)
        {
            var includeColumns = includeIndexAnnotation.Value.ToString().Split(",");
            var includeOperation = new StringBuilder();
            builder.Append(" INCLUDE(");
            foreach (var includeColumn in includeColumns)
            {
                if (includeOperation.Length > 0)
                    includeOperation.Append(",");
                includeOperation.Append($"\"{includeColumn}\"");
            }
            includeOperation.Append(")");
            builder.Append(includeOperation);
        }

        if (terminate)
        {
            builder.AppendLine(StatementTerminator);
            EndStatement(builder);
        }

和

NpgsqlMigrationsAnnotationProvider

For（IIndex index）函数：

        var baseAnnotations = base.For(index);
        var customAnnotations = index.GetAnnotations().Where(a => a.Name == "IncludeIndex");
        return baseAnnotations.Concat(customAnnotations);

扩展名：

 public static IndexBuilder Include<TEntity>(this IndexBuilder indexBuilder, Expression<Func<TEntity, object>> indexExpression)
    {
        var includeStatement = new StringBuilder();
        foreach (var column in indexExpression.GetPropertyAccessList())
        {
            if (includeStatement.Length > 0)
                includeStatement.Append(",");

            includeStatement.AppendFormat("{0}", column.Name);
        }

        indexBuilder.HasAnnotation("IncludeIndex", includeStatement.ToString());

        return indexBuilder;
    }

DesignTimeDbContextFactory：

   builder.ReplaceService<IMigrationsAnnotationProvider, PostgreSql.DbMigrationsAnnotationProvider>();
                builder.ReplaceService<IMigrationsSqlGenerator, PostgreSql.DbMigrationsSqlGenerator>();

DbContext：

   entity.HasIndex(log => new { log.Id }).Include<Log>(log => new { log.Type, log.Source, log.Created, log.Message })

此代码可与sql server正常工作，但不适用于postgresql。 无法将包含命令添加到CreateIndex查询。 感谢您的支持。