Package org.apache.druid.indexer.partitions

Interface PartitionsSpec

All Known Subinterfaces:

DimensionBasedPartitionsSpec

All Known Implementing Classes:

DimensionRangePartitionsSpec, DynamicPartitionsSpec, HashedPartitionsSpec, SingleDimensionPartitionsSpec

public interface PartitionsSpec

PartitionsSpec describes the secondary partitioning method for data ingestion.

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_MAX_ROWS_PER_SEGMENT
static int	HISTORICAL_NULL
static String	MAX_ROWS_PER_SEGMENT

Method Summary

Modifier and Type	Method	Description
String	getForceGuaranteedRollupIncompatiblityReason()
Integer	getMaxRowsPerSegment()	Returns the max number of rows per segment.
SecondaryPartitionType	getType()
static boolean	isEffectivelyNull(Integer val)	'-1' regarded as null for some historical reason.
static boolean	isEffectivelyNull(Long val)	'-1' regarded as null for some historical reason.
default boolean	isForceGuaranteedRollupCompatible()
default boolean	isForceGuaranteedRollupCompatibleType()
boolean	needsDeterminePartitions(boolean useForHadoopTask)	Returns true if this partitionsSpec needs to determine the number of partitions to start data ingestion.
static Integer	resolveHistoricalNullIfNeeded(Integer val)

Field Detail

DEFAULT_MAX_ROWS_PER_SEGMENT

static final int DEFAULT_MAX_ROWS_PER_SEGMENT

See Also:

Constant Field Values

MAX_ROWS_PER_SEGMENT

static final String MAX_ROWS_PER_SEGMENT

See Also:

Constant Field Values

HISTORICAL_NULL

static final int HISTORICAL_NULL

See Also:

Constant Field Values

Method Detail

getType

SecondaryPartitionType getType()

getMaxRowsPerSegment

@Nullable
Integer getMaxRowsPerSegment()

Returns the max number of rows per segment. Implementations can have different default values which it could be even null. Callers should use the right value depending on the context if this returns null.

needsDeterminePartitions

boolean needsDeterminePartitions(boolean useForHadoopTask)

Returns true if this partitionsSpec needs to determine the number of partitions to start data ingestion. It should usually return true if perfect rollup is enforced but number of partitions is not specified.

isForceGuaranteedRollupCompatibleType

default boolean isForceGuaranteedRollupCompatibleType()

Returns:

True if this partitionSpec's type is compatible with forceGuaranteedRollup=true.

isForceGuaranteedRollupCompatible

default boolean isForceGuaranteedRollupCompatible()

Returns:

True if this partitionSpec's property values are compatible with forceGuaranteedRollup=true.

getForceGuaranteedRollupIncompatiblityReason

String getForceGuaranteedRollupIncompatiblityReason()

Returns:

Message describing why this partitionSpec is incompatible with forceGuaranteedRollup=true. Empty string if the partitionSpec is compatible.

isEffectivelyNull

static boolean isEffectivelyNull(@Nullable
                                 Integer val)

'-1' regarded as null for some historical reason.

isEffectivelyNull

static boolean isEffectivelyNull(@Nullable
                                 Long val)

'-1' regarded as null for some historical reason.

resolveHistoricalNullIfNeeded

@Nullable
static Integer resolveHistoricalNullIfNeeded(@Nullable
                                             Integer val)