…atabaseDdlMetadata (#161)

* changes without context

        autosynth cannot find the source of changes triggered by earlier changes in this
        repository, or by version upgrades to tools such as linters.

* chore: revert breaking docstrings and unneeded bigquery doc ignore

Co-authored-by: larkee <larkee@users.noreply.github.com>

The comment for the breaking changes in `2.0.0` doesn't explain what the breaking changes are. This PR updates the comment to detail what is breaking about the change.

* feat: add support for instance labels

* docs: update parameter docstrings

* docs: add missing literal end-string

* style: fix lint errors

* docs: update labels type

* docs: revert emulator_host docstring

Co-authored-by: larkee <larkee@users.noreply.github.com>

These samples' region tags slightly differ from identical snippets in different languages. The following is the remedy:

1. Merge this PR to fix GitHub source (keep old tag for now)
2. Fix doc code includes to represent the better region tag
3. Submit a second PR to clean-up redundant region tag wrapping

* test: add labels to test instance for cleanup

* test: add labels to dbapi test instance for cleanup

* style: fix lint errors

Co-authored-by: larkee <larkee@users.noreply.github.com>

Fixes #198, includes #201.

Fix a bug in test_system.py around backup instance proto conversion.

Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>

* changes without context

        autosynth cannot find the source of changes triggered by earlier changes in this
        repository, or by version upgrades to tools such as linters.

* fix: remove client recv msg limit fix: add enums to `types/__init__.py`

PiperOrigin-RevId: 347055288

Source-Author: Google APIs <noreply@google.com>
Source-Date: Fri Dec 11 12:44:37 2020 -0800
Source-Repo: googleapis/googleapis
Source-Sha: dd372aa22ded7a8ba6f0e03a80e06358a3fa0907
Source-Link: googleapis/googleapis@dd372aa

* docs: revert unsupported docstring headers

Co-authored-by: larkee <larkee@users.noreply.github.com>
Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>

Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>

* feat: autocommit sample

* remove unused imports

* Remove samples/samples init

* No package-relative imports in samples

* fix check errors, rename test file

* move ResultsChecksum() to test

* use connection.Cursor in patch

* Apply suggestions from code review

Co-authored-by: Chris Kleinknecht <libc@google.com>

* Update samples/samples/autocommit_test.py

Co-authored-by: Chris Kleinknecht <libc@google.com>

* lint fix

Co-authored-by: Chris Kleinknecht <libc@google.com>
Co-authored-by: Alex <7764119+AVaksman@users.noreply.github.com>
Co-authored-by: Ilya Gurov <ilya.faer@mail.ru>
Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>

* fix(dbapi): autocommit enabling fails if no transactions begun

* remove unused import

* don't calculate checksums in autocommit mode

* try using dummy WHERE clause

* revert where clause

* unveil error

* fix where clauses

* add print

* don't log

* print failed exceptions

* don't print

* separate insert statements

* don't return

* re-run

* don't pyformat insert args

* args

* re-run

* fix

* fix error in transactions.tests.NonAutocommitTests.test_orm_query_without_autocommit

* fix "already committed" error

* fix for AttributeError: 'tuple' object has no attribute 'items'

* fix

* fix KeyError: 'type'

Co-authored-by: Chris Kleinknecht <libc@google.com>
Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>
Co-authored-by: Alex <7764119+AVaksman@users.noreply.github.com>

* docs: standardize region tags and fix cc lint

* docs: cleanup outer tagging now that docs are updated

Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>

* fix: use the original protobuf

* use pb

* use pb

…ations (#186)

Co-authored-by: larkee <larkee@users.noreply.github.com>

* feat: docs for parser.py

* feat: docstrings

* Fix whitespace, formatting

* style: fix lint errors

Co-authored-by: Chris Kleinknecht <libc@google.com>
Co-authored-by: larkee <31196561+larkee@users.noreply.github.com>
Co-authored-by: larkee <larkee@users.noreply.github.com>

🤖 I have created a release \*beep\* \*boop\* 
---
## [3.0.0](https://www.github.com/googleapis/python-spanner/compare/v2.1.0...v3.0.0) (2021-01-15)


### ⚠ BREAKING CHANGES

* convert operations pbs into Operation objects when listing operations (#186)

### Features

* add support for instance labels ([#193](https://www.github.com/googleapis/python-spanner/issues/193)) ([ed462b5](https://www.github.com/googleapis/python-spanner/commit/ed462b567a1a33f9105ffb37ba1218f379603614))
* add support for ssl credentials; add throttled field to UpdateDatabaseDdlMetadata ([#161](https://www.github.com/googleapis/python-spanner/issues/161)) ([2faf01b](https://www.github.com/googleapis/python-spanner/commit/2faf01b135360586ef27c66976646593fd85fd1e))
* adding missing docstrings for functions & classes  ([#188](https://www.github.com/googleapis/python-spanner/issues/188)) ([9788cf8](https://www.github.com/googleapis/python-spanner/commit/9788cf8678d882bd4ccf551f828050cbbb8c8f3a))
* autocommit sample ([#172](https://www.github.com/googleapis/python-spanner/issues/172)) ([4ef793c](https://www.github.com/googleapis/python-spanner/commit/4ef793c9cd5d6dec6e92faf159665e11d63762ad))


### Bug Fixes

* convert operations pbs into Operation objects when listing operations ([#186](https://www.github.com/googleapis/python-spanner/issues/186)) ([ed7152a](https://www.github.com/googleapis/python-spanner/commit/ed7152adc37290c63e59865265f36c593d9b8da3))
* Convert PBs in system test cleanup ([#199](https://www.github.com/googleapis/python-spanner/issues/199)) ([ede4343](https://www.github.com/googleapis/python-spanner/commit/ede4343e518780a4ab13ae83017480d7046464d6))
* **dbapi:** autocommit enabling fails if no transactions begun ([#177](https://www.github.com/googleapis/python-spanner/issues/177)) ([e981adb](https://www.github.com/googleapis/python-spanner/commit/e981adb3157bb06e4cb466ca81d74d85da976754))
* **dbapi:** executemany() hiding all the results except the last ([#181](https://www.github.com/googleapis/python-spanner/issues/181)) ([020dc17](https://www.github.com/googleapis/python-spanner/commit/020dc17c823dfb65bfaacace14d2c9f491c97e11))
* **dbapi:** Spanner protobuf changes causes KeyError's ([#206](https://www.github.com/googleapis/python-spanner/issues/206)) ([f1e21ed](https://www.github.com/googleapis/python-spanner/commit/f1e21edbf37aab93615fd415d61f829d2574916b))
* remove client side gRPC receive limits ([#192](https://www.github.com/googleapis/python-spanner/issues/192)) ([90effc4](https://www.github.com/googleapis/python-spanner/commit/90effc4d0f4780b7a7c466169f9fc1e45dab8e7f))
* Rename to fix "Mismatched region tag" check ([#201](https://www.github.com/googleapis/python-spanner/issues/201)) ([c000ec4](https://www.github.com/googleapis/python-spanner/commit/c000ec4d9b306baa0d5e9ed95f23c0273d9adf32))


### Documentation

* homogenize region tags ([#194](https://www.github.com/googleapis/python-spanner/issues/194)) ([1501022](https://www.github.com/googleapis/python-spanner/commit/1501022239dfa8c20290ca0e0cf6a36e9255732c))
* homogenize region tags pt 2 ([#202](https://www.github.com/googleapis/python-spanner/issues/202)) ([87789c9](https://www.github.com/googleapis/python-spanner/commit/87789c939990794bfd91f5300bedc449fd74bd7e))
* update CHANGELOG breaking change comment ([#180](https://www.github.com/googleapis/python-spanner/issues/180)) ([c7b3b9e](https://www.github.com/googleapis/python-spanner/commit/c7b3b9e4be29a199618be9d9ffa1d63a9d0f8de7))
---


This PR was generated with [Release Please](https://github.com/googleapis/release-please). See [documentation](https://github.com/googleapis/release-please#release-please).