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Add table_exists method to Catalog #512

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merged 5 commits into from
Mar 14, 2024
Merged

Add table_exists method to Catalog #512

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cac570c
Add `table_exist` method to Catalog
anupam-saini Mar 11, 2024
9fc1b63
`table_exist` -> `table_exists`
anupam-saini Mar 11, 2024
500d04d
Add `table_exists` for RestCatalog
anupam-saini Mar 12, 2024
b116ab9
Merge branch 'apache:main' into as-table-exist
anupam-saini Mar 13, 2024
22d2166
Add doc
anupam-saini Mar 13, 2024
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7 changes: 7 additions & 0 deletions pyiceberg/catalog/__init__.py
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Original file line number Diff line number Diff line change
Expand Up @@ -646,6 +646,13 @@ def purge_table(self, identifier: Union[str, Identifier]) -> None:
delete_files(io, prev_metadata_files, PREVIOUS_METADATA)
delete_files(io, {table.metadata_location}, METADATA)

def table_exists(self, identifier: Union[str, Identifier]) -> bool:
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try:
self.load_table(identifier)
return True
except NoSuchTableError:
return False

@staticmethod
def _write_metadata(metadata: TableMetadata, io: FileIO, metadata_path: str) -> None:
ToOutputFile.table_metadata(metadata, io.new_output(metadata_path))
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11 changes: 11 additions & 0 deletions tests/catalog/test_base.py
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Expand Up @@ -377,6 +377,17 @@ def test_table_raises_error_on_table_not_found(catalog: InMemoryCatalog) -> None
catalog.load_table(TEST_TABLE_IDENTIFIER)


def test_table_exists(catalog: InMemoryCatalog) -> None:
# Given
given_catalog_has_a_table(catalog)
# Then
assert catalog.table_exists(TEST_TABLE_IDENTIFIER)


def test_table_exists_on_table_not_found(catalog: InMemoryCatalog) -> None:
assert not catalog.table_exists(TEST_TABLE_IDENTIFIER)


def test_drop_table(catalog: InMemoryCatalog) -> None:
# Given
given_catalog_has_a_table(catalog)
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