org.apache.hadoop.hive.ql.optimizer.calcite

Class HiveRelBuilder

java.lang.Object

org.apache.calcite.tools.RelBuilder

org.apache.hadoop.hive.ql.optimizer.calcite.HiveRelBuilder

public class HiveRelBuilder
extends org.apache.calcite.tools.RelBuilder

Builder for relational expressions in Hive.

RelBuilder does not make possible anything that you could not also accomplish by calling the factory methods of the particular relational expression. But it makes common tasks more straightforward and concise.

It is not thread-safe.

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.tools.RelBuilder

org.apache.calcite.tools.RelBuilder.AggCall, org.apache.calcite.tools.RelBuilder.GroupKey, org.apache.calcite.tools.RelBuilder.GroupKeyImpl

Field Summary

Fields inherited from class org.apache.calcite.tools.RelBuilder

cluster, relOptSchema

Method Summary

Modifier and Type	Method and Description
static org.apache.calcite.tools.RelBuilder	create(org.apache.calcite.tools.FrameworkConfig config) Creates a RelBuilder.
org.apache.calcite.tools.RelBuilder	empty() Empty relationship can be expressed in many different ways, e.g., filter(cond=false), empty LogicalValues(), etc.
org.apache.calcite.tools.RelBuilder	filter(Iterable<? extends org.apache.calcite.rex.RexNode> predicates)
static org.apache.calcite.sql.SqlFunction	getFloorSqlFunction(org.apache.calcite.avatica.util.TimeUnitRange flag)
static org.apache.calcite.sql.SqlAggFunction	getRollup(org.apache.calcite.sql.SqlAggFunction aggregation)
static org.apache.calcite.tools.RelBuilderFactory	proto(org.apache.calcite.plan.Context context) Creates a RelBuilderFactory, a partially-created RelBuilder.
static org.apache.calcite.tools.RelBuilderFactory	proto(Object... factories) Creates a RelBuilderFactory that uses a given set of factories.

Methods inherited from class org.apache.calcite.tools.RelBuilder

aggregate, aggregate, aggregate, aggregateCall, aggregateCall, aggregateCall, aggregateCall, alias, and, and, as, avg, build, call, call, cast, cast, cast, clear, convert, count, countStar, desc, distinct, dot, dot, equals, field, field, field, field, field, field, field, fields, fields, fields, fields, fields, fields, filter, getRexBuilder, getTypeFactory, groupKey, groupKey, groupKey, groupKey, groupKey, groupKey, groupKey, groupKey, intersect, intersect, isNotNull, isNull, join, join, join, join, join, limit, literal, match, max, min, minus, minus, not, notEquals, nullsFirst, nullsLast, or, or, patternAlter, patternAlter, patternConcat, patternConcat, patternExclude, patternField, patternPermute, patternPermute, patternQuantify, patternQuantify, peek, peek, peek, permute, project, project, project, project, push, pushAll, rename, scan, scan, semiJoin, semiJoin, sort, sort, sort, sortLimit, sortLimit, sum, union, union, values, values, values, values, variable

Methods inherited from class java.lang.Object

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

Method Detail

create

public static org.apache.calcite.tools.RelBuilder create(org.apache.calcite.tools.FrameworkConfig config)

Creates a RelBuilder.

proto

public static org.apache.calcite.tools.RelBuilderFactory proto(org.apache.calcite.plan.Context context)

Creates a RelBuilderFactory, a partially-created RelBuilder. Just add a RelOptCluster and a RelOptSchema

proto

public static org.apache.calcite.tools.RelBuilderFactory proto(Object... factories)

Creates a RelBuilderFactory that uses a given set of factories.

filter

public org.apache.calcite.tools.RelBuilder filter(Iterable<? extends org.apache.calcite.rex.RexNode> predicates)

Overrides:

filter in class org.apache.calcite.tools.RelBuilder

empty

public org.apache.calcite.tools.RelBuilder empty()

Empty relationship can be expressed in many different ways, e.g., filter(cond=false), empty LogicalValues(), etc. Calcite default implementation uses empty LogicalValues(); however, currently there is not an equivalent to this expression in Hive. Thus, we use limit 0, since Hive already includes optimizations that will do early pruning of the result tree when it is found, e.g., GlobalLimitOptimizer.

Overrides:

empty in class org.apache.calcite.tools.RelBuilder

getFloorSqlFunction

public static org.apache.calcite.sql.SqlFunction getFloorSqlFunction(org.apache.calcite.avatica.util.TimeUnitRange flag)

getRollup

public static org.apache.calcite.sql.SqlAggFunction getRollup(org.apache.calcite.sql.SqlAggFunction aggregation)