Add foreign key constraint to ci_pipeline_variables
What does this MR do and why?
Add not valid foreign key constraint to ci_pipeline_variables.pipeline_id_convert_to_bigint
This is part of the ci_pipeline_variables.pipeline_id
bigint conversion. As we need to replicate whatever is setup for ci_pipeline_variables.pipeline_id
to ci_pipeline_variables.pipeline_id_convert_to_bigint
, foreign key is one of them.
This is the first step to add foreign key constraint to an existing column, see https://docs.gitlab.com/ee/development/database/add_foreign_key_to_existing_column.html
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Related to #412864 (closed)