Struct ParquetConfig 

pub struct ParquetConfig {
    pub row_group_strategy: Option<RowGroupStrategy>,
    pub row_group_rows: Option<usize>,
    pub target_row_group_mb: Option<usize>,
    pub max_row_group_mb: Option<usize>,
}

Parquet-specific tuning for row group sizing.

Fields

row_group_strategy: Option<RowGroupStrategy>

How to determine the row group size. Default: auto.

row_group_rows: Option<usize>

Exact number of rows per group (fixed_rows only).

target_row_group_mb: Option<usize>

Target Arrow buffer memory per row group in MB (auto and fixed_memory). Default: 128.

max_row_group_mb: Option<usize>

Hard upper bound on row group memory in MB. When set, further reduces computed row count.

Implementations

impl ParquetConfig

pub const DEFAULT_TARGET_ROW_GROUP_MB: usize = 128

pub fn effective_row_group_rows(&self, schema: &SchemaRef) -> Option<usize>

Compute the effective rows-per-group from schema column types.

Returns None for fixed_rows when row_group_rows is not set (caller falls back to the parquet library default of 1,048,576 rows).

Trait Implementations

impl Clone for ParquetConfig

fn clone(&self) -> ParquetConfig

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for ParquetConfig

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

Formats the value using the given formatter.

impl Default for ParquetConfig

fn default() -> ParquetConfig

Returns the “default value” for a type.

impl<'de> Deserialize<'de> for ParquetConfig

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl JsonSchema for ParquetConfig

fn schema_name() -> Cow<'static, str>

The name of the generated JSON Schema.

fn schema_id() -> Cow<'static, str>

Returns a string that uniquely identifies the schema produced by this type.

fn json_schema(generator: &mut SchemaGenerator) -> Schema

Generates a JSON Schema for this type.

fn inline_schema() -> bool

Whether JSON Schemas generated for this type should be included directly in parent schemas, rather than being re-used where possible using the $ref keyword.

impl Serialize for ParquetConfig

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.