Consolidate catalog behavior

[kevinjqliu]

Feature Request / Improvement

We should ensure consistency in catalog behaviors for all implementations.

Currently, we have a few different catalog implementations (dynamodb, glue, hive, rest, and sql).
Each catalog implementation supports a set of functions described in the Catalog ABC class (https://github.com/apache/iceberg-python/blob/main/pyiceberg/catalog/__init__.py#L276)

The behavior for each catalog implementation should be standardized. And we should test that a set of behaviors is consistent across all catalog implementations.

Here are a few related issues

• Rest Catalog: catalog.name should not be part of namespace #742
• SqlCatalog and other catalog works different on load_namespace_properties #769
• Add table_exists method to the Catalog #507
• [Feature] Support Metadata Log Update For Non-Rest Catalogs #849

Add SqlCatalog to test console #488 is an example PR that utilizes tests/cli/test_console.py to ensure the same behaviors for different catalogs.

[rohithkanchukatla]

Hii Kevin, Can I take up this issue?

[kevinjqliu]

@rohithkanchukatla sure thing

[soumya-ghosh]

@kevinjqliu this can be closed as well as all tasks in this issue are completed.

[kevinjqliu]

The behavior for each catalog implementation should be standardized. And we should test that a set of behaviors is consistent across all catalog implementations.

@soumya-ghosh I want to keep this issue open until we have a solution to address future updates. Ideally, there's a set of tests that will check the behavior of all the catalog implementations.

Add SqlCatalog to test console #488 is an example PR that utilizes tests/cli/test_console.py to ensure the same behaviors for different catalogs.

A possible solution is to test the input and expected output via the CLI

[github-actions]

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[jayceslesar]

We can delete mountains of code if this is done correctly....

What about a strategy of each test_catalog providing a suite of basic fixtures that can be passed into a parameterized suite of functions?

Something like...

@mock_aws
@pytest.fixture
def catalog_list_tables_fixture(...)
   ...

Like the glue test, and dynamo test (ect) could all provide a fixture like that? Unsure the best architecture but I think doing it correctly can vastly reduce the amount of code in the catalog test suite

[jayceslesar]

@kevinjqliu what do you think about something like this...

from unittest.mock import MagicMock

import pytest

from pyiceberg.catalog import Catalog
from tests.conftest import BUCKET_NAME

HIVE_CATALOG_NAME = "hive"
HIVE_METASTORE_FAKE_URL = "thrift://unknown:9083"


@pytest.fixture
def glue(_bucket_initialize: None, moto_endpoint_url: str) -> Catalog:
    from pyiceberg.catalog.glue import GlueCatalog

    catalog = GlueCatalog(
        name="glue",
        bucket_name=BUCKET_NAME,
        endpoint_url=moto_endpoint_url,
    )
    catalog.create_namespace("foobar")

    return catalog


@pytest.fixture
def hive() -> Catalog:
    from pyiceberg.catalog.hive import HiveCatalog

    catalog = HiveCatalog(
        name="hive",
        uri=HIVE_METASTORE_FAKE_URL,
    )
    catalog._client = MagicMock()
    catalog._client.__enter__().get_all_databases.return_value = ["foobar"]

    return catalog


@pytest.mark.parametrize("catalog", [
    pytest.lazy_fixture("glue"),
    pytest.lazy_fixture("hive")
])
def test_list_namespaces_common(catalog: Catalog) -> None:
    namespaces = catalog.list_namespaces()
    assert namespaces == [("foobar",)]

I think it becomes more of a configuration workflow than a "catalog" workflow if that makes sense?