Package org.odpi.openmetadata.adapters.connectors.duckdb.survey

Class DuckDBDatabaseStatsExtractor

java.lang.Object
org.odpi.openmetadata.adapters.connectors.duckdb.survey.DuckDBDatabaseStatsExtractor
public class DuckDBDatabaseStatsExtractor extends Object
DuckDBDatabaseStatsExtractor gathers statistics about the schemas, tables and columns of a DuckDB database using DuckDB's own catalog metadata table functions (duckdb_schemas(), duckdb_tables() and duckdb_columns()) and converts them into the same vendor-neutral measurement beans used by the other database connector suites (RelationalDataManagerMeasurement, RelationalSchemaMeasurement, RelationalTableMeasurement and RelationalColumnMeasurement), tagged with the reused SurveyDatabaseAnnotationType constants.
DuckDB, being embedded, does not expose the same workload statistics as a client/server database (there is no equivalent of Postgres's pg_stat_database/pg_table_size/pg_column_size). Where DuckDB does not provide an equivalent measurement, the corresponding field is simply left at its default value.

  • Constructor Details

    • DuckDBDatabaseStatsExtractor

      public DuckDBDatabaseStatsExtractor(List<String> validDatabases, SurveyActionServiceConnector surveyActionServiceConnector)
      Constructor sets up the list of databases to process and the connection to the database.
      Parameters:
      validDatabases - list of database names
      surveyActionServiceConnector - calling connector