org.apache.gravitino.dto.rel.partitioning

Interface Partitioning

All Superinterfaces:

Expression, Transform

All Known Implementing Classes:

BucketPartitioningDTO, DayPartitioningDTO, FunctionPartitioningDTO, HourPartitioningDTO, IdentityPartitioningDTO, ListPartitioningDTO, MonthPartitioningDTO, Partitioning.SingleFieldPartitioning, RangePartitioningDTO, TruncatePartitioningDTO, YearPartitioningDTO

public interface Partitioning
extends Transform

A partitioning strategy is a way to divide a table into smaller, more manageable pieces. This interface represents a partitioning strategy.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	Partitioning.SingleFieldPartitioning A single field partitioning strategy.
static class	Partitioning.Strategy Represents a partitioning strategy.

Nested classes/interfaces inherited from interface org.apache.gravitino.rel.expressions.transforms.Transform

Transform.SingleFieldTransform

Field Summary

Fields

Modifier and Type	Field and Description
static Partitioning[]	EMPTY_PARTITIONING An empty array of partitioning.

Fields inherited from interface org.apache.gravitino.rel.expressions.Expression

EMPTY_EXPRESSION, EMPTY_NAMED_REFERENCE

Method Summary

Modifier and Type	Method and Description
Partitioning.Strategy	strategy() Returns the name of the partitioning strategy.
void	validate(ColumnDTO[] columns) Validates the partitioning columns.

Methods inherited from interface org.apache.gravitino.rel.expressions.transforms.Transform

arguments, assignments, children, name

Methods inherited from interface org.apache.gravitino.rel.expressions.Expression

references

Field Detail

EMPTY_PARTITIONING

static final Partitioning[] EMPTY_PARTITIONING

An empty array of partitioning.

Method Detail

strategy

Partitioning.Strategy strategy()

Returns the name of the partitioning strategy.

Returns:

The name of the partitioning strategy.

validate

void validate(ColumnDTO[] columns)
       throws java.lang.IllegalArgumentException

Validates the partitioning columns.

Parameters:

columns - The columns to be validated.

Throws:

java.lang.IllegalArgumentException - If the columns are invalid, this exception is thrown.