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Schema evolution enables a destination to adapt the schema of its objects (e.g. columns, fields, tables, files, collections) over time without disrupting operations or data integrity. Streamkap Connectors support - where applicable - the following types of schema changes:
ObjectChangeBehavior
ColumnAddAdds the new column to the end of the destination table.
RemoveKeeps the column in the destination table intact but is left empty (NULL values) from the point of change onwards.
Data typeAdds a new column. For example if there is a column named AGE which is the NUMBER type but is then altered to VARCHAR type, an additional column is added named AGE_CHR of type VARCHAR. AGE column is kept intact.
RenameAdds a new column. For example, if there is a column named FIRST_NAME that’s renamed to FULL_NAME, an additional column is added named FULL_NAME and will be populated from the point of change onwards. FIRST_NAME column is kept intact but is left empty (NULL values).
TableAddAdding a table is done by modifying your Source Connector and Pipelines. Streamkap will automatically backfill/snapshot the newly added table (by default) while streaming data simultaneously.
RemoveKeeps the destination table intact but stops capturing change event data for it.
RenameRenaming table(s) will report an error and you will need to add the renamed table to your affected Source Connector and Pipeline(s) to capture it.