Package org.apache.druid.sql.calcite.planner

Class QueryHandler

java.lang.Object

org.apache.druid.sql.calcite.planner.SqlStatementHandler.BaseStatementHandler

org.apache.druid.sql.calcite.planner.QueryHandler

All Implemented Interfaces:

SqlStatementHandler

Direct Known Subclasses:

IngestHandler, QueryHandler.SelectHandler

public abstract class QueryHandler
extends SqlStatementHandler.BaseStatementHandler

Abstract base class for handlers that revolve around queries: SELECT, INSERT and REPLACE. This class handles the common SELECT portion of the statement.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	QueryHandler.SelectHandler

Nested classes/interfaces inherited from interface org.apache.druid.sql.calcite.planner.SqlStatementHandler

SqlStatementHandler.BaseStatementHandler, SqlStatementHandler.HandlerContext

Field Summary

Fields

Modifier and Type	Field	Description
protected org.apache.calcite.sql.SqlExplain	explain
protected org.apache.calcite.rex.RexBuilder	rexBuilder
protected org.apache.calcite.rel.RelRoot	rootQueryRel

Fields inherited from class org.apache.druid.sql.calcite.planner.SqlStatementHandler.BaseStatementHandler

handlerContext, resourceActions

Constructor Summary

Constructors

Constructor	Description
QueryHandler(SqlStatementHandler.HandlerContext handlerContext, org.apache.calcite.sql.SqlExplain explain)

Method Summary

Modifier and Type	Method	Description
protected abstract QueryMaker	buildQueryMaker(org.apache.calcite.rel.RelRoot rootQueryRel)
ExplainAttributes	explainAttributes()
PlannerResult	plan()
protected PlannerResult	planExplanation(org.apache.calcite.rel.RelRoot relRoot, org.apache.calcite.rel.RelNode rel, boolean isDruidConventionExplanation)	Construct a PlannerResult for an 'explain' query from a RelNode and root RelRoot
protected abstract PlannerResult	planForDruid()
protected PlannerResult	planWithDruidConvention()	Construct a PlannerResult for a RelNode that is directly translatable to a native Druid query.
void	prepare()
PrepareResult	prepareResult()
protected abstract org.apache.calcite.rel.type.RelDataType	returnedRowType()
protected org.apache.calcite.sql.SqlNode	validate(org.apache.calcite.sql.SqlNode root)
protected abstract org.apache.calcite.sql.SqlNode	validatedQueryNode()

Methods inherited from class org.apache.druid.sql.calcite.planner.SqlStatementHandler.BaseStatementHandler

resourceActions

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.druid.sql.calcite.planner.SqlStatementHandler

validate

Field Details

explain

protected org.apache.calcite.sql.SqlExplain explain

rootQueryRel

protected org.apache.calcite.rel.RelRoot rootQueryRel

rexBuilder

protected org.apache.calcite.rex.RexBuilder rexBuilder

Constructor Details

QueryHandler

public QueryHandler(SqlStatementHandler.HandlerContext handlerContext,
 org.apache.calcite.sql.SqlExplain explain)

Method Details

validate

protected org.apache.calcite.sql.SqlNode validate(org.apache.calcite.sql.SqlNode root)

prepare

public void prepare()

prepareResult

public PrepareResult prepareResult()

validatedQueryNode

protected abstract org.apache.calcite.sql.SqlNode validatedQueryNode()

returnedRowType

protected abstract org.apache.calcite.rel.type.RelDataType returnedRowType()

plan

public PlannerResult plan()

explainAttributes

public ExplainAttributes explainAttributes()

planExplanation

protected PlannerResult planExplanation(org.apache.calcite.rel.RelRoot relRoot,
 org.apache.calcite.rel.RelNode rel,
 boolean isDruidConventionExplanation)

Construct a PlannerResult for an 'explain' query from a RelNode and root RelRoot

planForDruid

protected abstract PlannerResult planForDruid()
                                       throws org.apache.calcite.tools.ValidationException

Throws:

org.apache.calcite.tools.ValidationException

planWithDruidConvention

protected PlannerResult planWithDruidConvention()
                                         throws org.apache.calcite.tools.ValidationException

Construct a PlannerResult for a RelNode that is directly translatable to a native Druid query.

Throws:

org.apache.calcite.tools.ValidationException

buildQueryMaker

protected abstract QueryMaker buildQueryMaker(org.apache.calcite.rel.RelRoot rootQueryRel)
                                       throws org.apache.calcite.tools.ValidationException

Throws:

org.apache.calcite.tools.ValidationException