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Improve Spanner delete_data sample coverage #3922

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Merged
merged 2 commits into from
Jun 3, 2020
Merged

Improve Spanner delete_data sample coverage #3922

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8fed5ec
improve Spanner delete_data sample coverage
larkee Jun 1, 2020
cbc088f
specify end to stay consistent with other languages
larkee Jun 1, 2020
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15 changes: 12 additions & 3 deletions spanner/cloud-client/snippets.py
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Original file line number Diff line number Diff line change
Expand Up @@ -106,14 +106,23 @@ def delete_data(instance_id, database_id):
instance = spanner_client.instance(instance_id)
database = instance.database(database_id)

singers_to_delete = spanner.KeySet(
keys=[[1], [2], [3], [4], [5]])
# Delete individual rows
albums_to_delete = spanner.KeySet(
keys=[[1, 1], [1, 2], [2, 1], [2, 2], [2, 3]])
keys=[[2, 1], [2, 3]])

# Delete a range of rows where the column key is >=3 and <5
singers_range = spanner.KeyRange(start_closed=[3], end_open=[5])
singers_to_delete = spanner.KeySet(
ranges=[singers_range])

# Delete remaining Singers rows, which will also delete the remaining
# Albums rows because Albums was defined with ON DELETE CASCADE
remaining_singers = spanner.KeySet(all_=True)

with database.batch() as batch:
batch.delete('Albums', albums_to_delete)
batch.delete('Singers', singers_to_delete)
batch.delete('Singers', remaining_singers)

print('Deleted data.')
# [END spanner_delete_data]
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