Crate hdbconnect_arrow 

Apache Arrow integration for hdbconnect SAP HANA driver.

This crate provides zero-copy conversion from HANA ResultSets to Apache Arrow RecordBatches, enabling efficient data transfer to Python via PyO3.

Features

• Type-safe HANA to Arrow type mapping
• Streaming RecordBatch iteration for large result sets
• Sealed traits for API stability
• Generic Associated Types (GATs) for lending iterators

Example

use hdbconnect_arrow::{Result, BatchConfig, HanaBatchProcessor};

// Configure batch processing
let config = BatchConfig::default();
let schema = /* Arrow schema */;
let mut processor = HanaBatchProcessor::new(schema, config);

// Process rows
for row in result_set {
    if let Some(batch) = processor.process_row(&row)? {
        // Handle batch
    }
}

// Flush remaining rows
if let Some(batch) = processor.flush()? {
    // Handle final batch
}

Re-exports

pub use builders::factory::BuilderFactory;

pub use conversion::HanaBatchProcessor;

pub use conversion::rows_to_record_batch;

pub use error::ArrowConversionError;

pub use error::Result;

pub use schema::mapping::SchemaMapper;

pub use traits::builder::HanaCompatibleBuilder;

pub use traits::row::RowLike;

pub use traits::sealed::FromHanaValue;

pub use traits::streaming::BatchConfig;

pub use traits::streaming::BatchProcessor;

pub use traits::streaming::LendingBatchIterator;

pub use types::arrow::FieldMetadataExt;

pub use types::arrow::hana_field_to_arrow;

pub use types::arrow::hana_type_to_arrow;

pub use types::conversion::TypeCategory;

pub use types::hana::Binary;

pub use types::hana::Decimal;

pub use types::hana::DecimalPrecision;

pub use types::hana::DecimalScale;

pub use types::hana::HanaTypeCategory;

pub use types::hana::Lob;

pub use types::hana::Numeric;

pub use types::hana::Spatial;

pub use types::hana::StringType;

pub use types::hana::Temporal;

pub use types::hana::TypedColumn;

Modules

builders

Arrow array builders for HANA value conversion.

conversion

Conversion utilities for HANA rows to Arrow RecordBatches.

error

Error hierarchy for hdbconnect-arrow.

schema

Schema conversion and mapping utilities.

traits

Trait definitions for HANA to Arrow conversion.

types

Type definitions for HANA to Arrow conversion.