Struct datafusion::config::ParquetOptions

pub struct ParquetOptions {
    pub enable_page_index: bool,
    pub pruning: bool,
    pub skip_metadata: bool,
    pub metadata_size_hint: Option<usize>,
    pub pushdown_filters: bool,
    pub reorder_filters: bool,
}

Options related to reading of parquet files

Fields (Non-exhaustive)

Non-exhaustive structs could have additional fields added in future. Therefore, non-exhaustive structs cannot be constructed in external crates using the traditional Struct { .. } syntax; cannot be matched against without a wildcard ..; and struct update syntax will not work.

enable_page_index: bool

If true, uses parquet data page level metadata (Page Index) statistics to reduce the number of rows decoded.

pruning: bool

If true, the parquet reader attempts to skip entire row groups based on the predicate in the query and the metadata (min/max values) stored in the parquet file

skip_metadata: bool

If true, the parquet reader skip the optional embedded metadata that may be in the file Schema. This setting can help avoid schema conflicts when querying multiple parquet files with schemas containing compatible types but different metadata

metadata_size_hint: Option<usize>

If specified, the parquet reader will try and fetch the last size_hint bytes of the parquet file optimistically. If not specified, two reads are required: One read to fetch the 8-byte parquet footer and another to fetch the metadata length encoded in the footer

pushdown_filters: bool

If true, filter expressions are be applied during the parquet decoding operation to reduce the number of rows decoded

reorder_filters: bool

If true, filter expressions evaluated during the parquet decoding operation will be reordered heuristically to minimize the cost of evaluation. If false, the filters are applied in the same order as written in the query

Trait Implementations

impl Clone for ParquetOptions

fn clone(&self) -> ParquetOptions

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ParquetOptions

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.

impl Default for ParquetOptions

fn default() -> ParquetOptions

Returns the “default value” for a type.