claudevdm opened a new pull request, #40199:
URL: https://github.com/apache/beam/pull/40199
* AddFiles: wire the schema pre-pass behind a Wait.on gate (batch)
AddFiles gets a ninth constructor argument, SchemaEvolutionConfig
With options set, the topology becomes
paths -> ReadFooterSchema -> CollectDistinctSchemas -> CommitSchemaOnce
|
paths -> Wait.on(signal) -> ConvertToDataFile -> ... (unchanged)
so no path reaches ConvertToDataFile until the schema commit has landed.
* IcebergAddFiles provider: schema_evolution_options, required_columns,
incompatible_schema_handling, unverifiable_file_handling
Exposes the pre-pass through the iceberg_add_files SchemaTransform and Beam
YAML:
- type: WriteToIceberg (transform: IcebergAddFiles in YAML)
config:
table: db.sales
schema_evolution_options: [ALLOW_FIELD_ADDITION, ALLOW_TYPE_PROMOTION]
required_columns: [id]
incompatible_schema_handling: ROUTE_TO_ERRORS
* trigger tests
* simplify arg
* tests
* fixes
* changes
* comments, refresh only once per bundle
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