Package org.elasticsearch.xpack.esql.datasources.spi

Interface SourceStatistics

public interface SourceStatistics
Statistics about a data source for query planning and optimization. Implementations should provide as much information as available from the underlying data source metadata.

  • Method Details

    • rowCount

      OptionalLong rowCount()
      Returns the total number of rows in the source, if known.
      Returns:
      optional row count

    • sizeInBytes

      OptionalLong sizeInBytes()
      Returns the total size in bytes, if known.
      Returns:
      optional size in bytes

    • columnStatistics

      default Optional<Map<String,SourceStatistics.ColumnStatistics>> columnStatistics()
      Returns per-column statistics, if available. The map keys are column names.
      Returns:
      optional map of column name to column statistics