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feat: Emit Postgres schema as _sdc_postgres_schema #466

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feat: Emit Postgres schema as _sdc_postgres_schema #466

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feat: Emit Postgres schema as `_sdc_postgres_schema`
edgarrmondragon Jul 16, 2024
e112a77
Merge branch 'main' into edgarrmondragon/feat/_sdc_postgres_schema
edgarrmondragon Jun 10, 2025
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8 changes: 8 additions & 0 deletions tap_postgres/client.py
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Original file line number Diff line number Diff line change
Expand Up @@ -207,6 +207,13 @@ class PostgresStream(SQLStream):
# JSONB Objects won't be selected without type_conformance_level to ROOT_ONLY
TYPE_CONFORMANCE_LEVEL = TypeConformanceLevel.ROOT_ONLY

@functools.cached_property
def schema(self) -> dict:
"""Override schema adding _sdc columns."""
schema_dict = self._singer_catalog_entry.schema.to_dict()
schema_dict["properties"]["_sdc_postgres_schema"] = {"type": ["string", "null"]}
return schema_dict

def max_record_count(self) -> int | None:
"""Return the maximum number of records to fetch in a single query."""
return self.config.get("max_record_count")
Expand Down Expand Up @@ -280,6 +287,7 @@ def get_records(self, context: Context | None) -> t.Iterable[dict[str, t.Any]]:
if transformed_record is None:
# Record filtered out during post_process()
continue
transformed_record["_sdc_postgres_schema"] = table.schema
yield transformed_record


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