# Copyright 2021 The SQLNet Company GmbH
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to
# deal in the Software without restriction, including without limitation the
# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
# sell copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
# DEALINGS IN THE SOFTWARE.
"""
Lists the colnames of a table held in the database.
"""
import json
import getml.communication as comm
from .connection import Connection
[docs]def get_colnames(name, conn=None):
"""
Lists the colnames of a table held in the database.
Args:
name (str):
The name of the table in the database.
conn (:class:`~getml.database.Connection`, optional):
The database connection to be used.
If you don't explicitly pass a connection,
the engine will use the default connection.
"""
# -------------------------------------------
conn = conn or Connection()
# -------------------------------------------
# Prepare command.
cmd = dict()
cmd["name_"] = name
cmd["type_"] = "Database.get_colnames"
cmd["conn_id_"] = conn.conn_id
# -------------------------------------------
# Send JSON command to engine.
sock = comm.send_and_get_socket(cmd)
# -------------------------------------------
# Make sure that everything went well.
msg = comm.recv_string(sock)
if msg != "Success!":
sock.close()
comm.engine_exception_handler(msg)
# -------------------------------------------
# Parse result as list.
arr = json.loads(comm.recv_string(sock))
sock.close()
return arr