Create namespace from CLI (apache#336)

pyiceberg/cli/console.py

@@ -206,6 +206,23 @@ def version(ctx: Context) -> None:
     ctx.obj["output"].version(__version__)
 
 
+@run.group()
+def create() -> None:
+    """Operation to create a namespace."""
+
+
+@create.command()
+@click.argument("identifier")
+@click.pass_context
+@catch_exception()
+def namespace(ctx: Context, identifier: str) -> None:
+    """Create a namespace."""
+    catalog, output = _catalog_and_output(ctx)
+
+    catalog.create_namespace(identifier)
+    output.text(f"Created namespace: {identifier}")
+
+
 @run.group()
 def drop() -> None:
     """Operations to drop a namespace or table."""
@@ -223,11 +240,11 @@ def table(ctx: Context, identifier: str) -> None:  # noqa: F811
     output.text(f"Dropped table: {identifier}")
 
 
-@drop.command()
+@drop.command()  # type: ignore
 @click.argument("identifier")
 @click.pass_context
 @catch_exception()
-def namespace(ctx: Context, identifier: str) -> None:
+def namespace(ctx: Context, identifier: str) -> None:  # noqa: F811
     """Drop a namespace."""
     catalog, output = _catalog_and_output(ctx)
 

tests/cli/test_console.py

@@ -308,6 +308,22 @@ def test_drop_namespace_does_not_exists(catalog: InMemoryCatalog) -> None:
     assert result.output == "Namespace does not exist: ('doesnotexist',)\n"
 
 
+def test_create_namespace(catalog: InMemoryCatalog) -> None:
+    runner = CliRunner()
+    result = runner.invoke(run, ["create", "namespace", TEST_TABLE_NAMESPACE])
+    assert result.exit_code == 0
+    assert result.output == """Created namespace: default\n"""
+
+
+def test_create_namespace_already_exists(catalog: InMemoryCatalog) -> None:
+    catalog.create_namespace(TEST_TABLE_NAMESPACE)
+
+    runner = CliRunner()
+    result = runner.invoke(run, ["create", "namespace", TEST_TABLE_NAMESPACE])
+    assert result.exit_code == 1
+    assert result.output == "Namespace already exists: ('default',)\n"
+
+
 def test_rename_table(catalog: InMemoryCatalog) -> None:
     catalog.create_table(
         identifier=TEST_TABLE_IDENTIFIER,