Agg() on ID fails

[dmpetrov]

Description

It fails for any column, for example file.size.

import datachain as dc


def process(idx_list: list[int], files: list[dc.File]):
  idx = idx_list[0]
  jsons = [
    f for f in files
    if f.get_file_ext() == "json"
  ]
  print(f"Batch {idx}: {len(jsons)}/{len(files)}")
  yield idx, len(jsons), len(files)


data = dc.read_storage("gs://mpii-human-pose/")
(
    data
    .mutate(idx=data.c("sys.id") % 13)
    .persist()
    .agg(
        process,
        params=("idx", "file"),
        output={"idx": int, "processed": int, "total": int},
        partition_by="idx",
    )
    .save("batch-id")
)

Output CLI:

/Users/dmitry/src/audio_examples/.audio/lib/python3.12/site-packages/datachain/data_storage/db_engine.py:56: SAWarning: SELECT statement has a cartesian product between FROM element(s) "aCMSImcSmdLLNIhj" and FROM element "anon_2".  Apply join condition(s) between each element to resolve.
  return statement.compile(dialect=cls.dialect, **kwargs)


Traceback (most recent call last):
  File "/Users/dmitry/src/audio_examples/tmp.py", line 18, in <module>
    .persist()
     ^^^^^^^^^
  File "/Users/dmitry/src/audio_examples/.audio/lib/python3.12/site-packages/datachain/lib/dc/datachain.py", line 534, in persist
    query=self._query.save(project=project, feature_schema=schema)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/dmitry/src/audio_examples/.audio/lib/python3.12/site-packages/datachain/query/dataset.py", line 1802, in save
    self.catalog.warehouse.copy_table(dr.get_table(), query.select())
  File "/Users/dmitry/src/audio_examples/.audio/lib/python3.12/site-packages/datachain/data_storage/sqlite.py", line 794, in copy_table
    ids = self.db.execute(select_ids).fetchall()
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/Users/dmitry/src/audio_examples/.audio/lib/python3.12/site-packages/datachain/data_storage/sqlite.py", line 101, in wrapper
    raise exc
  File "/Users/dmitry/src/audio_examples/.audio/lib/python3.12/site-packages/datachain/data_storage/sqlite.py", line 97, in wrapper
    return func(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^
  File "/Users/dmitry/src/audio_examples/.audio/lib/python3.12/site-packages/datachain/data_storage/sqlite.py", line 241, in execute
    result = self.db.execute(*self.compile_to_args(query))
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
sqlite3.OperationalError: no such table: aCMSImcSmdLLNIhj

Output Studio:

/tmp/local/datachain_venv/python3.12/default/lib/python3.12/site-packages/clickhouse_sqlalchemy/drivers/compilers/sqlcompiler.py:312: SAWarning: SELECT statement has a cartesian product between FROM element(s) "anon_2" and FROM element "YyEJafkdNIGfqJtN".  Apply join condition(s) between each element to resolve.
  from_linter.warn()
Traceback (most recent call last):
  File "/tmp/local/datachain_venv/python3.12/default/lib/python3.12/site-packages/clickhouse_driver/dbapi/cursor.py", line 111, in execute
    response = execute(
               ^^^^^^^^
  File "/tmp/local/datachain_venv/python3.12/default/lib/python3.12/site-packages/clickhouse_driver/client.py", line 382, in execute
    rv = self.process_ordinary_query(
         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tmp/local/datachain_venv/python3.12/default/lib/python3.12/site-packages/clickhouse_driver/client.py", line 580, in process_ordinary_query
    return self.receive_result(with_column_types=with_column_types,
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/tmp/local/datachain_venv/python3.12/default/lib/python3.12/site-packages/clickhouse_driver/client.py", line 212, in receive_result
    return result.get_result()
           ^^^^^^^^^^^^^^^^^^^
  File "/tmp/local/datachain_venv/python3.12/default/lib/python3.12/site-packages/clickhouse_driver/result.py", line 50, in get_result
    for packet in self.packet_generator:
                  ^^^^^^^^^^^^^^^^^^^^^
  File "/tmp/local/datachain_venv/python3.12/default/lib/python3.12/site-packages/clickhouse_driver/client.py", line 228, in packet_generator
    packet = self.receive_packet()
             ^^^^^^^^^^^^^^^^^^^^^
  File "/tmp/local/datachain_venv/python3.12/default/lib/python3.12/site-packages/clickhouse_driver/client.py", line 245, in receive_packet
    raise packet.exception
clickhouse_driver.errors.ServerException: Code: 60.
DB::Exception: Table studio_production_db.YyEJafkdNIGfqJtN does not exist. Stack trace:

0. ./ci/tmp/build/./src/Common/Exception.cpp:112: DB::Exception::Exception(DB::Exception::MessageMasked&&, int, bool) @ 0x000000000d529e08
1. DB::Exception::Exception(PreformattedMessage&&, int) @ 0x0000000009182e3c
2. DB::Exception::Exception<String, String>(int, FormatStringHelperImpl<std::type_identity<String>::type, std::type_identity<String>::type>, String&&, String&&) @ 0x000000000918295c

Version Info

[dreadatour]

Two issues here:

1. Weird error (should be improved).
2. data.c("sys.id") % 13 will not works. data.c is the same as dc.C is the same as sqlalchemy's Column and it does not supports %, or, at least, it does not supports it in our case. Using func will works (like dc.func.rand() % 13).

[dmpetrov]

sqlalchemy's Column and it does not supports %,

Column does support / and it should support % as well - https://docs.sqlalchemy.org/en/20/core/sqlelement.html#sqlalchemy.sql.expression.ColumnOperators.mod