Package io.trino.parquet.reader

Class ParquetReader

java.lang.Object

io.trino.parquet.reader.ParquetReader

All Implemented Interfaces:

Closeable, AutoCloseable

public class ParquetReader
extends Object
implements Closeable

Field Summary

Fields

Modifier and Type	Field	Description
static final String	COLUMN_INDEX_ROWS_FILTERED
static final String	PARQUET_CODEC_METRIC_PREFIX

Constructor Summary

Constructors

Constructor	Description
ParquetReader(Optional<String> fileCreatedBy, List<Field> columnFields, List<org.apache.parquet.hadoop.metadata.BlockMetaData> blocks, List<Long> firstRowsOfBlocks, ParquetDataSource dataSource, org.joda.time.DateTimeZone timeZone, AggregatedMemoryContext memoryContext, ParquetReaderOptions options, Function<Exception,RuntimeException> exceptionTransform)
ParquetReader(Optional<String> fileCreatedBy, List<Field> columnFields, List<org.apache.parquet.hadoop.metadata.BlockMetaData> blocks, List<Long> firstRowsOfBlocks, ParquetDataSource dataSource, org.joda.time.DateTimeZone timeZone, AggregatedMemoryContext memoryContext, ParquetReaderOptions options, Function<Exception,RuntimeException> exceptionTransform, Optional<TupleDomainParquetPredicate> parquetPredicate, List<Optional<org.apache.parquet.internal.filter2.columnindex.ColumnIndexStore>> columnIndexStore, Optional<ParquetWriteValidation> writeValidation)

Method Summary

Modifier and Type	Method	Description
void	close()
ParquetDataSource	getDataSource()
AggregatedMemoryContext	getMemoryContext()
Metrics	getMetrics()
static List<PrimitiveField>	getPrimitiveFields(List<Field> fields)
long	lastBatchStartRow()	Get the global row index of the first row in the last batch.
Page	nextPage()
Block	readBlock(Field field)

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Details

PARQUET_CODEC_METRIC_PREFIX

public static final String PARQUET_CODEC_METRIC_PREFIX

See Also:

• Constant Field Values

COLUMN_INDEX_ROWS_FILTERED

public static final String COLUMN_INDEX_ROWS_FILTERED

See Also:

• Constant Field Values

Constructor Details

ParquetReader

public ParquetReader(Optional<String> fileCreatedBy,
 List<Field> columnFields,
 List<org.apache.parquet.hadoop.metadata.BlockMetaData> blocks,
 List<Long> firstRowsOfBlocks,
 ParquetDataSource dataSource,
 org.joda.time.DateTimeZone timeZone,
 AggregatedMemoryContext memoryContext,
 ParquetReaderOptions options,
 Function<Exception,RuntimeException> exceptionTransform)
              throws IOException

Throws:

IOException

ParquetReader

public ParquetReader(Optional<String> fileCreatedBy,
 List<Field> columnFields,
 List<org.apache.parquet.hadoop.metadata.BlockMetaData> blocks,
 List<Long> firstRowsOfBlocks,
 ParquetDataSource dataSource,
 org.joda.time.DateTimeZone timeZone,
 AggregatedMemoryContext memoryContext,
 ParquetReaderOptions options,
 Function<Exception,RuntimeException> exceptionTransform,
 Optional<TupleDomainParquetPredicate> parquetPredicate,
 List<Optional<org.apache.parquet.internal.filter2.columnindex.ColumnIndexStore>> columnIndexStore,
 Optional<ParquetWriteValidation> writeValidation)
              throws IOException

Throws:

IOException

Method Details

close

public void close()
           throws IOException

Specified by:

close in interface AutoCloseable

Specified by:

close in interface Closeable

Throws:

IOException

nextPage

public Page nextPage()
              throws IOException

Throws:

IOException

lastBatchStartRow

public long lastBatchStartRow()

Get the global row index of the first row in the last batch.

getMetrics

public Metrics getMetrics()

getPrimitiveFields

public static List<PrimitiveField> getPrimitiveFields(List<Field> fields)

readBlock

public Block readBlock(Field field)
                throws IOException

Throws:

IOException

getDataSource

public ParquetDataSource getDataSource()

getMemoryContext

public AggregatedMemoryContext getMemoryContext()