org.apache.drill.exec.planner.sql.handlers

Class DefaultSqlHandler

java.lang.Object

org.apache.drill.exec.planner.sql.handlers.AbstractSqlHandler

org.apache.drill.exec.planner.sql.handlers.DefaultSqlHandler

Direct Known Subclasses:

CreateFunctionHandler, CreateTableHandler, DescribeSchemaHandler, DescribeTableHandler, DropFunctionHandler, DropTableHandler, ExplainHandler, RefreshMetadataHandler, ShowFileHandler, ShowSchemasHandler, ShowTablesHandler, ViewHandler

public class DefaultSqlHandler
extends AbstractSqlHandler

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
protected class	DefaultSqlHandler.ConvertedRelNode
static class	DefaultSqlHandler.MetaDataProviderModifier

Field Summary

Fields

Modifier and Type	Field and Description
protected SqlHandlerConfig	config
protected QueryContext	context

Constructor Summary

Constructors

Constructor and Description
DefaultSqlHandler(SqlHandlerConfig config)
DefaultSqlHandler(SqlHandlerConfig config, Pointer<String> textPlan)

Method Summary

Methods

Modifier and Type	Method and Description
protected DrillRel	addRenamedProject(DrillRel rel, org.apache.calcite.rel.type.RelDataType validatedRowType)
protected DrillRel	convertToDrel(org.apache.calcite.rel.RelNode relNode) Return Drill Logical RelNode tree for a SELECT statement, when it is executed / explained directly.
protected PhysicalPlan	convertToPlan(PhysicalOperator op)
protected PhysicalOperator	convertToPop(Prel prel)
protected Prel	convertToPrel(org.apache.calcite.rel.RelNode drel, org.apache.calcite.rel.type.RelDataType validatedRowType) Applies physical rules and certain transformations to convert drill relational node into physical one.
protected DrillRel	convertToRawDrel(org.apache.calcite.rel.RelNode relNode) Given a relNode tree for SELECT statement, convert to Drill Logical RelNode tree.
PhysicalPlan	getPlan(org.apache.calcite.sql.SqlNode sqlNode)
static List<PhysicalOperator>	getPops(PhysicalOperator root)
protected void	log(PlannerType plannerType, PlannerPhase phase, org.apache.calcite.rel.RelNode node, org.slf4j.Logger logger, com.google.common.base.Stopwatch watch)
protected void	log(String name, PhysicalPlan plan, org.slf4j.Logger logger)
protected void	log(String description, org.apache.calcite.rel.RelNode node, org.slf4j.Logger logger, com.google.common.base.Stopwatch watch)
protected void	logAndSetTextPlan(String description, Prel prel, org.slf4j.Logger logger)
protected org.apache.calcite.sql.SqlNode	rewrite(org.apache.calcite.sql.SqlNode node) Rewrite the parse tree.
protected org.apache.calcite.rel.RelNode	transform(PlannerType plannerType, PlannerPhase phase, org.apache.calcite.rel.RelNode input, org.apache.calcite.plan.RelTraitSet targetTraits) Transform RelNode to a new RelNode, targeting the provided set of traits.
protected org.apache.calcite.rel.RelNode	transform(PlannerType plannerType, PlannerPhase phase, org.apache.calcite.rel.RelNode input, org.apache.calcite.plan.RelTraitSet targetTraits, boolean log) Transform RelNode to a new RelNode, targeting the provided set of traits.
protected DefaultSqlHandler.ConvertedRelNode	validateAndConvert(org.apache.calcite.sql.SqlNode sqlNode)

Methods inherited from class org.apache.drill.exec.planner.sql.handlers.AbstractSqlHandler

unwrap

Methods inherited from class java.lang.Object

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

Field Detail

config

protected final SqlHandlerConfig config

context

protected final QueryContext context

Constructor Detail

DefaultSqlHandler

public DefaultSqlHandler(SqlHandlerConfig config)

DefaultSqlHandler

public DefaultSqlHandler(SqlHandlerConfig config,
                 Pointer<String> textPlan)

Method Detail

log

protected void log(PlannerType plannerType,
       PlannerPhase phase,
       org.apache.calcite.rel.RelNode node,
       org.slf4j.Logger logger,
       com.google.common.base.Stopwatch watch)

log

protected void log(String description,
       org.apache.calcite.rel.RelNode node,
       org.slf4j.Logger logger,
       com.google.common.base.Stopwatch watch)

logAndSetTextPlan

protected void logAndSetTextPlan(String description,
                     Prel prel,
                     org.slf4j.Logger logger)

log

protected void log(String name,
       PhysicalPlan plan,
       org.slf4j.Logger logger)
            throws com.fasterxml.jackson.core.JsonProcessingException

Throws:

com.fasterxml.jackson.core.JsonProcessingException

getPlan

public PhysicalPlan getPlan(org.apache.calcite.sql.SqlNode sqlNode)
                     throws org.apache.calcite.tools.ValidationException,
                            org.apache.calcite.tools.RelConversionException,
                            IOException,
                            ForemanSetupException

Specified by:

getPlan in class AbstractSqlHandler

Throws:

org.apache.calcite.tools.ValidationException

org.apache.calcite.tools.RelConversionException

IOException

ForemanSetupException

rewrite

protected org.apache.calcite.sql.SqlNode rewrite(org.apache.calcite.sql.SqlNode node)
                                          throws org.apache.calcite.tools.RelConversionException,
                                                 ForemanSetupException

Rewrite the parse tree. Used before validating the parse tree. Useful if a particular statement needs to converted into another statement.

Parameters:

node -

Returns:

Rewritten sql parse tree

Throws:

org.apache.calcite.tools.RelConversionException

ForemanSetupException

validateAndConvert

protected DefaultSqlHandler.ConvertedRelNode validateAndConvert(org.apache.calcite.sql.SqlNode sqlNode)
                                                         throws ForemanSetupException,
                                                                org.apache.calcite.tools.RelConversionException,
                                                                org.apache.calcite.tools.ValidationException

Throws:

ForemanSetupException

org.apache.calcite.tools.RelConversionException

org.apache.calcite.tools.ValidationException

convertToRawDrel

protected DrillRel convertToRawDrel(org.apache.calcite.rel.RelNode relNode)
                             throws SqlUnsupportedException,
                                    org.apache.calcite.tools.RelConversionException

Given a relNode tree for SELECT statement, convert to Drill Logical RelNode tree.

Parameters:

relNode - relational node

Returns:

Drill Logical RelNode tree

Throws:

SqlUnsupportedException

org.apache.calcite.tools.RelConversionException

convertToDrel

protected DrillRel convertToDrel(org.apache.calcite.rel.RelNode relNode)
                          throws org.apache.calcite.tools.RelConversionException,
                                 SqlUnsupportedException

Return Drill Logical RelNode tree for a SELECT statement, when it is executed / explained directly. Adds screen operator on top of converted node.

Parameters:

relNode - root RelNode corresponds to Calcite Logical RelNode.

Returns:

Drill Logical RelNode tree

Throws:

org.apache.calcite.tools.RelConversionException

SqlUnsupportedException

transform

protected org.apache.calcite.rel.RelNode transform(PlannerType plannerType,
                                       PlannerPhase phase,
                                       org.apache.calcite.rel.RelNode input,
                                       org.apache.calcite.plan.RelTraitSet targetTraits)

Transform RelNode to a new RelNode, targeting the provided set of traits. Also will log the outcome.

Parameters:

plannerType - The type of Planner to use.

phase - The transformation phase we're running.

input - The origianl RelNode

targetTraits - The traits we are targeting for output.

Returns:

The transformed relnode.

transform

protected org.apache.calcite.rel.RelNode transform(PlannerType plannerType,
                                       PlannerPhase phase,
                                       org.apache.calcite.rel.RelNode input,
                                       org.apache.calcite.plan.RelTraitSet targetTraits,
                                       boolean log)

Transform RelNode to a new RelNode, targeting the provided set of traits. Also will log the outcome if asked.

Parameters:

plannerType - The type of Planner to use.

phase - The transformation phase we're running.

input - The origianl RelNode

targetTraits - The traits we are targeting for output.

log - Whether to log the planning phase.

Returns:

The transformed relnode.

convertToPrel

protected Prel convertToPrel(org.apache.calcite.rel.RelNode drel,
                 org.apache.calcite.rel.type.RelDataType validatedRowType)
                      throws org.apache.calcite.tools.RelConversionException,
                             SqlUnsupportedException

Applies physical rules and certain transformations to convert drill relational node into physical one.

Parameters:

drel - relational node

validatedRowType - final output row type

Returns:

physical relational node

Throws:

org.apache.calcite.tools.RelConversionException

SqlUnsupportedException

convertToPop

protected PhysicalOperator convertToPop(Prel prel)
                                 throws IOException

Throws:

IOException

convertToPlan

protected PhysicalPlan convertToPlan(PhysicalOperator op)

getPops

public static List<PhysicalOperator> getPops(PhysicalOperator root)

addRenamedProject

protected DrillRel addRenamedProject(DrillRel rel,
                         org.apache.calcite.rel.type.RelDataType validatedRowType)