87 lines
3.2 KiB
Python
87 lines
3.2 KiB
Python
# -*- coding: utf-8 -*- #
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# Copyright 2016 Google LLC. All Rights Reserved.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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"""Command for spanner rows update."""
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from __future__ import absolute_import
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from __future__ import division
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from __future__ import unicode_literals
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from googlecloudsdk.api_lib.spanner import database_sessions
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from googlecloudsdk.api_lib.spanner import databases
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from googlecloudsdk.calliope import arg_parsers
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from googlecloudsdk.calliope import base
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from googlecloudsdk.command_lib.spanner import resource_args
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from googlecloudsdk.command_lib.spanner import write_util
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from googlecloudsdk.core import resources
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class Update(base.Command):
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# pylint:disable=line-too-long
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"""Update a row in a Cloud Spanner database.
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## EXAMPLES
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To update a row with SingerId=1,SingName=abc in table Singers under
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my-database and my-instance, run:
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$ {command} --table=Singers --database=my-database --instance=my-instance --data=SingerId=1,SingerName=abc
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$ {command} --table=Singers --database=my-database --instance=my-instance --flags-file=path/to/file.yaml
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"""
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@staticmethod
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def Args(parser):
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"""See base class."""
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resource_args.AddDatabaseResourceArg(parser, 'in which to update a row',
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False)
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parser.add_argument(
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'--table',
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required=True,
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type=str,
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help='The Cloud Spanner table name.')
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parser.add_argument(
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'--data',
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required=True,
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metavar='COLUMN_NAME=VALUE',
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type=arg_parsers.ArgDict(),
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help='The column names and values for the row being updated. '
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'For complicated input values, such as arrays, use the `--flags-file` '
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'flag. See $ gcloud topic flags-file for more information.')
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def Run(self, args):
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"""This is what gets called when the user runs this command."""
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database_ref = args.CONCEPTS.database.Parse()
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# DDL(Data Definition Language) is needed to get the schema of the current
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# database and table so that we know the type of each column (e.g. INT64)
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# user wants to delete.
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ddl = databases.GetDdl(database_ref)
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table = write_util.Table.FromDdl(ddl, args.table)
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data = write_util.ValidateArrayInput(table, args.data)
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mutation = database_sessions.MutationFactory.Update(table, data)
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# To commit a transaction in a session, we need to create one and delete it
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# at the end.
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session_name = database_sessions.Create(database_ref)
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session = resources.REGISTRY.ParseRelativeName(
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relative_name=session_name.name,
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collection='spanner.projects.instances.databases.sessions')
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try:
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return database_sessions.Commit(session, [mutation])
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finally:
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database_sessions.Delete(session)
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