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ParquetWriteConfig

laminar_connectors::lakehouse::delta_config

Struct ParquetWriteConfig 

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pub struct ParquetWriteConfig {
    pub compression: String,
    pub compression_level: i32,
    pub compaction_compression_level: Option<i32>,
    pub dictionary_enabled: bool,
    pub statistics: String,
    pub bloom_filter_columns: Vec<String>,
    pub bloom_filter_fpp: f64,
    pub bloom_filter_ndv: u64,
    pub max_row_group_size: usize,
}
Expand description

Configuration for Parquet writer properties (compression, dictionary encoding, statistics, bloom filters, row group sizing).

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§compression: String

Compression codec: "zstd", "snappy", "lz4", "gzip", or "none".

§compression_level: i32

Compression level (default: 1 — ZSTD L1 for hot writes).

§compaction_compression_level: Option<i32>

Optional higher compression level used during compaction (default: 3).

§dictionary_enabled: bool

Whether to enable dictionary encoding (default: true).

§statistics: String

Statistics granularity: "none", "chunk", or "page" (default: "page").

§bloom_filter_columns: Vec<String>

Columns to build bloom filters for (default: empty).

§bloom_filter_fpp: f64

Bloom filter false-positive probability (default: 0.01).

§bloom_filter_ndv: u64

Bloom filter expected number of distinct values (0 = parquet default).

§max_row_group_size: usize

Maximum rows per row group (default: 1,000,000).

Implementations§

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impl ParquetWriteConfig

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pub fn to_writer_properties(&self) -> Result<WriterProperties, ConnectorError>

Builds WriterProperties for hot-path writes (uses compression_level).

§Errors

Returns ConnectorError::ConfigurationError on invalid codec/level.

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pub fn compaction_writer_properties( &self, ) -> Result<WriterProperties, ConnectorError>

Builds WriterProperties for compaction (uses compaction_compression_level if set, otherwise falls back to compression_level).

§Errors

Returns ConnectorError::ConfigurationError on invalid codec/level.

Trait Implementations§

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impl Clone for ParquetWriteConfig

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fn clone(&self) -> ParquetWriteConfig

Returns a duplicate of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl Debug for ParquetWriteConfig

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

Formats the value using the given formatter. Read more
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impl Default for ParquetWriteConfig

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fn default() -> Self

Returns the “default value” for a type. Read more

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