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- Querying Parquet Metadata 11228
- Parquet Metadata The parquet_metadata function can be used to query the metadata contained within a Parquet file, which reveals various internal details of the Parquet file such as the statistics of the different columns. This can be useful
...INT data_page_offset BIGINT total_compressed_size BIGINT total_uncompressed_size BIGINT key_value_metadata MAP(BLOB, BLOB) bloom_filter_offset BIGINT bloom_filter_length BIGINT min_is_exact BOOLEAN max_is_exact BOOLEAN row_group_compressed_bytes BIGIN...[] parquet_kv_metadata STRUCT(...)[] Each struct array contains the same columns as the corresponding standalone function. Bloom Filters DuckDB supports Bloom filters for pruning the row groups that need to be read to answer highly selective queries....Currently, Bloom filters are supported for the following types: Integer types: TINYINT , UTINYINT , SMALLINT , USMALLINT , INTEGER , UINTEG... - https://man.mtool.work/duckdb/2.0/data/parquet/metadata.html
- COPY Statement 7485
- Examples Read a CSV file into the lineitem table, using auto-detected CSV options: COPY lineitem FROM 'lineitem.csv'; Read a CSV file into the lineitem table, using manually specified CSV options: COPY lineitem FROM 'lineitem.csv' (DELIMITE
...ictionary encoding, in number of distinct values. Set to 0 to disable dictionary encoding. BIGINT ROW_GROUP_SIZE / 5 WRITE_BLOOM_FILTER Whether to write Bloom filters that allow readers to skip row groups. BOOLEAN true BLOOM_FILTER_FALSE_POSITIVE_RATI...O The target false positive ratio of the written Bloom filters. DOUBLE 0.01 GEOPARQUET_VERSION Which GeoParquet metadata version to write for geometry columns ( NONE , V1 , V2 ,... - https://man.mtool.work/duckdb/2.0/sql/statements/copy.html
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DuckDB 2.0 Documentation / man.mtool.work