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fix: Add existing_nullable usage to visit_column_type #329

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Without this, altering operations (e.g. change column length) can cause nullability change of the column.

It then causes error if this column is a part of index: "400 Changing NOT NULL constraints on column column_name is not allowed because it affects index index_name"

  • Tests pass
  • Appropriate changes to README are included in PR

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google-cla bot commented Jun 16, 2023

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@product-auto-label product-auto-label bot added the api: spanner Issues related to the googleapis/python-spanner-sqlalchemy API. label Jun 16, 2023
Without this, altering operations (e.g. change column length) can cause nullability change of the column.
It then causes error if this column is a part of index:
"400 Changing NOT NULL constraints on column column_name is not allowed because it affects index index_name"
@minev-dev minev-dev force-pushed the fix/existing-nullable-visit-column-type branch from 0cb2dcc to 9274f79 Compare June 16, 2023 22:29
@minev-dev minev-dev changed the title Add existing_nullable usage to visit_column_type fix: Add existing_nullable usage to visit_column_type Jun 16, 2023
@minev-dev minev-dev marked this pull request as ready for review June 16, 2023 22:35
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