* fix: avoid implicit join when using join with unnest

When using JOIN with UNNEST statements, and then creating a SELECT statement
based on it, the UNNESTed table will appear twice in the FROM clause,
causing an implicit join of the table with itself

* Add safety checks

* Add tests and fix cover

…creation (#928)

* refactor: standardize bigquery options handling to manage more options

* feat: handle table partitioning, table clustering and more table options (expiration_timestamp, expiration_timestamp, require_partition_filter, default_rounding_mode) via create_table dialect options

* fix: having clustering fields and partitioning exposed has table indexes leads to bad autogenerated version file

def upgrade() -> None:
    # ### commands auto generated by Alembic - please adjust! ###
    op.drop_index('clustering', table_name='dataset.some_table')
    op.drop_index('partition', table_name='dataset.some_table')
    # ### end Alembic commands ###

def downgrade() -> None:
    # ### commands auto generated by Alembic - please adjust! ###
    op.create_index('partition', 'dataset.some_table', ['createdAt'], unique=False)
    op.create_index('clustering', 'dataset.some_table', ['id', 'createdAt'], unique=False)
    # ### end Alembic commands ###

* docs: update README to describe how to create clustered and partitioned table as well as other newly supported table options

* test: adjust system tests since indexes are no longer populated from table partitions and clustering info

* test: alembic now supports creating partitioned tables

* test: run integration tests with all the new create_table options

* chore: rename variables to represent what it is a bit more clearly

* fix: assertions should no be used to validate user inputs

* refactor: extract process_option_value() from post_create_table() for improved readability

* docs: add docstring to post_create_table() and _process_option_value()

* test: increase code coverage by testing error cases

* refactor: better represent the distinction between the option value data type check and the transformation in SQL literal

* test: adding test cases for _validate_option_value_type() and _process_option_value()

* chore: coding style

* chore: reformat files with black

* test: typo in tests

* feat: change the option name for partitioning to leverage the TimePartitioning interface of the Python Client for Google BigQuery

* fix: TimePartitioning.field is optional

* chore: coding style

* test: fix system test with table option bigquery_require_partition_filter

* feat: add support for experimental range_partitioning option

* test: fix system test with new bigquery_time_partitioning table option

* docs: update README with time_partitioning and range_partitioning

* test: relevant comments in unit tests

* test: cover all error cases

* chore: no magic numbers

* chore: consistency in docstrings

* chore: no magic number

* chore: better error types

* chore: fix W605 invalid escape sequence

* test: change compliance test rerun condition regex string

* try sys test

* add sleep to time

* change exceed rate limit code to 400

* change rerun condition format

* delete compliance tests to make it faster

* stop on first fail

* add rerun condition

* change rerun condition format

* add back the deleted tests

* remove investigation changes and add owlbot change

* black

* revert README

Source-Link: googleapis/synthtool@fac8444
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:5ea6d0ab82c956b50962f91d94e206d3921537ae5fe1549ec5326381d8905cfa

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

…p/templates/python_library/.kokoro (#1022)

Source-Link: googleapis/synthtool@e13b22b
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:97b671488ad548ef783a452a9e1276ac10f144d5ae56d98cc4bf77ba504082b4

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
Co-authored-by: Chalmer Lowe <chalmerlowe@google.com>

Source-Link: googleapis/synthtool@8d392a5
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:a0c4463fcfd9893fc172a3b3db2b6ac0c7b94ec6ad458c7dcea12d9693615ac3

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Source-Link: googleapis/synthtool@d895aec
Post-Processor: gcr.io/cloud-devrel-public-resources/owlbot-python:latest@sha256:98f3afd11308259de6e828e37376d18867fd321aba07826e29e4f8d9cab56bad

Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>

Co-authored-by: release-please[bot] <55107282+release-please[bot]@users.noreply.github.com>