metadata_column_util_internal.h File Reference

#include <cstdint>
#include <memory>
#include <string>
#include <arrow/type_fwd.h>
#include "iceberg/result.h"

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Classes
struct	iceberg::arrow::MetadataColumnContext
	Context for populating metadata columns during reading. More...

Functions
Result< std::shared_ptr<::arrow::Array > >	iceberg::arrow::MakeFilePathArray (const std::string &file_path, int64_t num_rows, ::arrow::MemoryPool *pool)
	Create a constant string array for _file column.
Result< std::shared_ptr<::arrow::Array > >	iceberg::arrow::MakeRowPositionArray (int64_t start_position, int64_t num_rows, ::arrow::MemoryPool *pool)
	Create a sequential int64 array for _pos column.

Detailed Description

Utility functions for populating metadata columns (_file and _pos) in readers.

Function Documentation

MakeFilePathArray()

Result< std::shared_ptr<::arrow::Array > > iceberg::arrow::MakeFilePathArray	(	const std::string &	file_path,
		int64_t	num_rows,
		::arrow::MemoryPool *	pool
	)

Create a constant string array for _file column.

Creates an Arrow StringArray where all values are the same file path string.

Parameters

file_path	The file path value.
num_rows	Number of rows in the batch.
pool	Arrow memory pool.

Returns

Arrow StringArray with constant file_path value.

MakeRowPositionArray()

Result< std::shared_ptr<::arrow::Array > > iceberg::arrow::MakeRowPositionArray	(	int64_t	start_position,
		int64_t	num_rows,
		::arrow::MemoryPool *	pool
	)

Create a sequential int64 array for _pos column.

Creates an Arrow Int64Array with sequential values starting from start_position.

Parameters

start_position	Starting row position (inclusive).
num_rows	Number of rows in the batch.
pool	Arrow memory pool.

Returns

Arrow Int64Array with values [start_position, start_position + num_rows).