Add/delete column

awswrangler/catalog/__init__.py

@@ -1,6 +1,6 @@
 """Amazon Glue Catalog Module."""
 
-from awswrangler.catalog._add import add_csv_partitions, add_parquet_partitions  # noqa
+from awswrangler.catalog._add import add_column, add_csv_partitions, add_parquet_partitions  # noqa
 from awswrangler.catalog._create import (  # noqa
     _create_csv_table,
     _create_parquet_table,
@@ -12,6 +12,7 @@
 )
 from awswrangler.catalog._delete import (  # noqa
     delete_all_partitions,
+    delete_column,
     delete_database,
     delete_partitions,
     delete_table_if_exists,

awswrangler/catalog/_add.py

@@ -7,7 +7,12 @@
 
 from awswrangler import _utils, exceptions
 from awswrangler._config import apply_configs
-from awswrangler.catalog._definitions import _csv_partition_definition, _parquet_partition_definition
+from awswrangler.catalog._definitions import (
+    _check_column_type,
+    _csv_partition_definition,
+    _parquet_partition_definition,
+    _update_table_definition,
+)
 from awswrangler.catalog._utils import _catalog_id, sanitize_table_name
 
 _logger: logging.Logger = logging.getLogger(__name__)
@@ -157,3 +162,65 @@ def add_parquet_partitions(
         _add_partitions(
             database=database, table=table, boto3_session=boto3_session, inputs=inputs, catalog_id=catalog_id
         )
+
+
+@apply_configs
+def add_column(
+    database: str,
+    table: str,
+    column_name: str,
+    column_type: str = "string",
+    column_comment: Optional[str] = None,
+    boto3_session: Optional[boto3.Session] = None,
+    catalog_id: Optional[str] = None,
+) -> None:
+    """Delete a column in a AWS Glue Catalog table.
+
+    Parameters
+    ----------
+    database : str
+        Database name.
+    table : str
+        Table name.
+    column_name : str
+        Column name
+    column_type : str
+        Column type.
+    column_comment : str
+        Column Comment
+    boto3_session : boto3.Session(), optional
+        Boto3 Session. The default boto3 session will be used if boto3_session receive None.
+    catalog_id : str, optional
+        The ID of the Data Catalog from which to retrieve Databases.
+        If none is provided, the AWS account ID is used by default.
+
+    Returns
+    -------
+    None
+        None
+
+    Examples
+    --------
+    >>> import awswrangler as wr
+    >>> wr.catalog.add_column(
+    ...     database='my_db',
+    ...     table='my_table',
+    ...     column_name='my_col',
+    ...     column_type='int'
+    ... )
+    """
+    if _check_column_type(column_type):
+        client_glue: boto3.client = _utils.client(service_name="glue", session=boto3_session)
+        table_res: Dict[str, Any] = client_glue.get_table(DatabaseName=database, Name=table)
+        table_input: Dict[str, Any] = _update_table_definition(table_res)
+        table_input["StorageDescriptor"]["Columns"].append(
+            {"Name": column_name, "Type": column_type, "Comment": column_comment}
+        )
+        res: Dict[str, Any] = client_glue.update_table(
+            **_catalog_id(catalog_id=catalog_id, DatabaseName=database, TableInput=table_input)
+        )
+        if ("Errors" in res) and res["Errors"]:
+            for error in res["Errors"]:
+                if "ErrorDetail" in error:
+                    if "ErrorCode" in error["ErrorDetail"]:
+                        raise exceptions.ServiceApiError(str(res["Errors"]))

awswrangler/catalog/_definitions.py

@@ -5,6 +5,27 @@
 
 _logger: logging.Logger = logging.getLogger(__name__)
 
+_LEGAL_COLUMN_TYPES = [
+    "array",
+    "bigint",
+    "binary",
+    "boolean",
+    "char",
+    "date",
+    "decimal",
+    "double",
+    "float",
+    "int",
+    "interval",
+    "map",
+    "set",
+    "smallint",
+    "string",
+    "struct",
+    "timestamp",
+    "tinyint",
+]
+
 
 def _parquet_table_definition(
     table: str, path: str, columns_types: Dict[str, str], partitions_types: Dict[str, str], compression: Optional[str]
@@ -138,3 +159,32 @@ def _csv_partition_definition(
             {"Name": cname, "Type": dtype} for cname, dtype in columns_types.items()
         ]
     return definition
+
+
+def _check_column_type(column_type: str) -> bool:
+    if column_type not in _LEGAL_COLUMN_TYPES:
+        raise ValueError(f"{column_type} is not a legal data type.")
+    return True
+
+
+def _update_table_definition(current_definition: Dict[str, Any]) -> Dict[str, Any]:
+    definition: Dict[str, Any] = dict()
+    keep_keys = [
+        "Name",
+        "Description",
+        "Owner",
+        "LastAccessTime",
+        "LastAnalyzedTime",
+        "Retention",
+        "StorageDescriptor",
+        "PartitionKeys",
+        "ViewOriginalText",
+        "ViewExpandedText",
+        "TableType",
+        "Parameters",
+        "TargetTable",
+    ]
+    for key in current_definition["Table"]:
+        if key in keep_keys:
+            definition[key] = current_definition["Table"][key]
+    return definition

awswrangler/catalog/_delete.py

@@ -1,12 +1,13 @@
 """AWS Glue Catalog Delete Module."""
 
 import logging
-from typing import List, Optional
+from typing import Any, Dict, List, Optional
 
 import boto3
 
-from awswrangler import _utils
+from awswrangler import _utils, exceptions
 from awswrangler._config import apply_configs
+from awswrangler.catalog._definitions import _update_table_definition
 from awswrangler.catalog._get import _get_partitions
 from awswrangler.catalog._utils import _catalog_id
 
@@ -181,3 +182,57 @@ def delete_all_partitions(
         boto3_session=boto3_session,
     )
     return partitions_values
+
+
+@apply_configs
+def delete_column(
+    database: str,
+    table: str,
+    column_name: str,
+    boto3_session: Optional[boto3.Session] = None,
+    catalog_id: Optional[str] = None,
+) -> None:
+    """Delete a column in a AWS Glue Catalog table.
+
+    Parameters
+    ----------
+    database : str
+        Database name.
+    table : str
+        Table name.
+    column_name : str
+        Column name
+    boto3_session : boto3.Session(), optional
+        Boto3 Session. The default boto3 session will be used if boto3_session receive None.
+    catalog_id : str, optional
+        The ID of the Data Catalog from which to retrieve Databases.
+        If none is provided, the AWS account ID is used by default.
+
+    Returns
+    -------
+    None
+        None
+
+    Examples
+    --------
+    >>> import awswrangler as wr
+    >>> wr.catalog.delete_column(
+    ...     database='my_db',
+    ...     table='my_table',
+    ...     column_name='my_col',
+    ... )
+    """
+    client_glue: boto3.client = _utils.client(service_name="glue", session=boto3_session)
+    table_res: Dict[str, Any] = client_glue.get_table(DatabaseName=database, Name=table)
+    table_input: Dict[str, Any] = _update_table_definition(table_res)
+    table_input["StorageDescriptor"]["Columns"] = [
+        i for i in table_input["StorageDescriptor"]["Columns"] if i["Name"] != column_name
+    ]
+    res: Dict[str, Any] = client_glue.update_table(
+        **_catalog_id(catalog_id=catalog_id, DatabaseName=database, TableInput=table_input)
+    )
+    if ("Errors" in res) and res["Errors"]:
+        for error in res["Errors"]:
+            if "ErrorDetail" in error:
+                if "ErrorCode" in error["ErrorDetail"]:
+                    raise exceptions.ServiceApiError(str(res["Errors"]))

tests/test_athena.py

@@ -244,6 +244,16 @@ def test_catalog(path: str, glue_database: str, glue_table: str) -> None:
     assert len(tables) > 0
     for tbl in tables:
         assert tbl["DatabaseName"] == glue_database
+    # add & delete column
+    wr.catalog.add_column(
+        database=glue_database, table=glue_table, column_name="col2", column_type="int", column_comment="comment"
+    )
+    dtypes = wr.catalog.get_table_types(database=glue_database, table=glue_table)
+    assert len(dtypes) == 5
+    assert dtypes["col2"] == "int"
+    wr.catalog.delete_column(database=glue_database, table=glue_table, column_name="col2")
+    dtypes = wr.catalog.get_table_types(database=glue_database, table=glue_table)
+    assert len(dtypes) == 4
     # search
     tables = list(wr.catalog.search_tables(text="parquet", catalog_id=account_id))
     assert len(tables) > 0