add-lookup-table-singers-countries.yaml

# Copyright 2020 Google LLC
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#     https://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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databaseChangeLog:
  - preConditions:
     onFail: HALT
     onError: HALT
  - changeSet:
     id: add-lookup-table
     author: spanner-examples
     labels: example
     changes:
       # Creates a lookup table for the home country of a Singer. This will change the
       # country column from a pure text column to one tha tis required to reference a
       # value in another table (i.e. the 'lookup table').
       - addLookupTable:
          existingTableName: Singers
          existingColumnName: Country
          newTableName: Countries
          newColumnName: Name
          newColumnDataType: STRING(100)
          constraintName: FK_Singers_Countries