drop-table and drop-view commands, closes #111

docs/cli.rst

@@ -401,6 +401,14 @@ You can specify foreign key relationships between the tables you are creating us
 
 If a table with the same name already exists, you will get an error. You can choose to silently ignore this error with ``--ignore``, or you can replace the existing table with a new, empty table using ``--replace``.
 
+.. _cli_drop_table:
+
+Dropping tables
+===============
+
+You can drop a table using the ``drop-table`` command::
+
+    $ sqlite-utils drop-table mytable
 
 .. _cli_create_view:
 
@@ -416,6 +424,15 @@ You can create a view using the ``create-view`` command::
 
 Use ``--replace`` to replace an existing view of the same name, and ``--ignore`` to do nothing if a view already exists.
 
+.. _cli_drop_view:
+
+Dropping views
+==============
+
+You can drop a view using the ``drop-view`` command::
+
+    $ sqlite-utils drop-view myview
+
 .. _cli_add_column:
 
 Adding columns

sqlite_utils/cli.py

@@ -594,6 +594,22 @@ def create_table(path, table, columns, pk, not_null, default, fk, ignore, replac
     )
 
 
+@cli.command(name="drop-table")
+@click.argument(
+    "path",
+    type=click.Path(file_okay=True, dir_okay=False, allow_dash=False),
+    required=True,
+)
+@click.argument("table")
+def drop_table(path, table):
+    "Drop the specified table"
+    db = sqlite_utils.Database(path)
+    if table in db.table_names():
+        db[table].drop()
+    else:
+        raise click.ClickException('Table "{}" does not exist'.format(table))
+
+
 @cli.command(name="create-view")
 @click.argument(
     "path",
@@ -626,6 +642,23 @@ def create_view(path, view, select, ignore, replace):
     db.create_view(view, select)
 
 
+@cli.command(name="drop-view")
+@click.argument(
+    "path",
+    type=click.Path(file_okay=True, dir_okay=False, allow_dash=False),
+    required=True,
+)
+@click.argument("view")
+def drop_view(path, view):
+    "Drop the specified view"
+    db = sqlite_utils.Database(path)
+    if view in db.view_names():
+        db[view].drop()
+    else:
+        raise click.ClickException('View "{}" does not exist'.format(view))
+
+
+
 @cli.command()
 @click.argument(
     "path",

tests/test_cli.py

@@ -1065,3 +1065,73 @@ def test_create_view_replace():
         )
         assert 0 == result.exit_code
         assert "CREATE VIEW version AS select sqlite_version()" == db["version"].schema
+
+
+def test_drop_table():
+    runner = CliRunner()
+    with runner.isolated_filesystem():
+        db = Database("test.db")
+        db["t"].create({"pk": int}, pk="pk")
+        assert "t" in db.table_names()
+        result = runner.invoke(
+            cli.cli,
+            [
+                "drop-table",
+                "test.db",
+                "t",
+            ],
+        )
+        assert 0 == result.exit_code
+        assert "t" not in db.table_names()
+
+
+def test_drop_table_error():
+    runner = CliRunner()
+    with runner.isolated_filesystem():
+        db = Database("test.db")
+        db["t"].create({"pk": int}, pk="pk")
+        result = runner.invoke(
+            cli.cli,
+            [
+                "drop-table",
+                "test.db",
+                "t2",
+            ],
+        )
+        assert 1 == result.exit_code
+        assert 'Error: Table "t2" does not exist' == result.output.strip()
+
+
+def test_drop_view():
+    runner = CliRunner()
+    with runner.isolated_filesystem():
+        db = Database("test.db")
+        db.create_view("hello", "select 1")
+        assert "hello" in db.view_names()
+        result = runner.invoke(
+            cli.cli,
+            [
+                "drop-view",
+                "test.db",
+                "hello",
+            ],
+        )
+        assert 0 == result.exit_code
+        assert "hello" not in db.view_names()
+
+
+def test_drop_view_error():
+    runner = CliRunner()
+    with runner.isolated_filesystem():
+        db = Database("test.db")
+        db["t"].create({"pk": int}, pk="pk")
+        result = runner.invoke(
+            cli.cli,
+            [
+                "drop-view",
+                "test.db",
+                "t2",
+            ],
+        )
+        assert 1 == result.exit_code
+        assert 'Error: View "t2" does not exist' == result.output.strip()