Method GetGroupBySqlPreviewAsync(long, IEnumerable<GroupFieldRequest>, IEnumerable<AggregateRequest>, string?)

Assembly: redb.Postgres.Pro.dll

Pro: SQL Preview for GroupBy with filterJson (legacy compatibility).
Note: filterJson is ignored - use FilterExpression overload for filtering.

public Task<string> GetGroupBySqlPreviewAsync(long schemeId, IEnumerable<GroupFieldRequest> groupFields, IEnumerable<AggregateRequest> aggregations, string? filterJson = null)