org.apache.druid.sql.calcite.view

Class ViewSqlEngine

java.lang.Object

org.apache.druid.sql.calcite.view.ViewSqlEngine

All Implemented Interfaces:

SqlEngine

public class ViewSqlEngine
extends Object
implements SqlEngine

Engine used for getting the row type of views. Does not do any actual planning or execution of the view.

Field Summary

Fields

Modifier and Type	Field and Description
static ViewSqlEngine	INSTANCE

Method Summary

Modifier and Type	Method and Description
QueryMaker	buildQueryMakerForInsert(String targetDataSource, org.apache.calcite.rel.RelRoot relRoot, PlannerContext plannerContext) Create a QueryMaker for an INSERT ...
QueryMaker	buildQueryMakerForSelect(org.apache.calcite.rel.RelRoot relRoot, PlannerContext plannerContext) Create a QueryMaker for a SELECT query.
boolean	feature(EngineFeature feature, PlannerContext plannerContext) Whether a feature applies to this engine or not.
String	name() Name of this engine.
org.apache.calcite.rel.type.RelDataType	resultTypeForInsert(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory, org.apache.calcite.rel.type.RelDataType validatedRowType) SQL row type that would be emitted by the QueryMaker from SqlEngine.buildQueryMakerForInsert(java.lang.String, org.apache.calcite.rel.RelRoot, org.apache.druid.sql.calcite.planner.PlannerContext).
org.apache.calcite.rel.type.RelDataType	resultTypeForSelect(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory, org.apache.calcite.rel.type.RelDataType validatedRowType) SQL row type that would be emitted by the QueryMaker from SqlEngine.buildQueryMakerForSelect(org.apache.calcite.rel.RelRoot, org.apache.druid.sql.calcite.planner.PlannerContext).
void	validateContext(QueryContext queryContext) Validates a provided query context.

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final ViewSqlEngine INSTANCE

Method Detail

name

public String name()

Description copied from interface: SqlEngine

Name of this engine. Appears in user-visible messages.

Specified by:

name in interface SqlEngine

feature

public boolean feature(EngineFeature feature,
                       PlannerContext plannerContext)

Description copied from interface: SqlEngine

Whether a feature applies to this engine or not.

Specified by:

feature in interface SqlEngine

validateContext

public void validateContext(QueryContext queryContext)

Description copied from interface: SqlEngine

Validates a provided query context. Returns quietly if the context is OK; throws ValidationException if the context has a problem.

Specified by:

validateContext in interface SqlEngine

resultTypeForSelect

public org.apache.calcite.rel.type.RelDataType resultTypeForSelect(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory,
                                                                   org.apache.calcite.rel.type.RelDataType validatedRowType)

Description copied from interface: SqlEngine

SQL row type that would be emitted by the QueryMaker from SqlEngine.buildQueryMakerForSelect(org.apache.calcite.rel.RelRoot, org.apache.druid.sql.calcite.planner.PlannerContext). Called for SELECT. Not called for EXPLAIN, which is handled by the planner itself.

Specified by:

resultTypeForSelect in interface SqlEngine

Parameters:

typeFactory - type factory

validatedRowType - row type from Calcite's validator

resultTypeForInsert

public org.apache.calcite.rel.type.RelDataType resultTypeForInsert(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory,
                                                                   org.apache.calcite.rel.type.RelDataType validatedRowType)

Description copied from interface: SqlEngine

SQL row type that would be emitted by the QueryMaker from SqlEngine.buildQueryMakerForInsert(java.lang.String, org.apache.calcite.rel.RelRoot, org.apache.druid.sql.calcite.planner.PlannerContext). Called for INSERT and REPLACE. Not called for EXPLAIN, which is handled by the planner itself.

Specified by:

resultTypeForInsert in interface SqlEngine

Parameters:

typeFactory - type factory

validatedRowType - row type from Calcite's validator

buildQueryMakerForSelect

public QueryMaker buildQueryMakerForSelect(org.apache.calcite.rel.RelRoot relRoot,
                                           PlannerContext plannerContext)

Description copied from interface: SqlEngine

Create a QueryMaker for a SELECT query.

Specified by:

buildQueryMakerForSelect in interface SqlEngine

Parameters:

relRoot - planned and validated rel

plannerContext - context for this query

Returns:

an executor for the provided query

buildQueryMakerForInsert

public QueryMaker buildQueryMakerForInsert(String targetDataSource,
                                           org.apache.calcite.rel.RelRoot relRoot,
                                           PlannerContext plannerContext)

Description copied from interface: SqlEngine

Create a QueryMaker for an INSERT ... SELECT query.

Specified by:

buildQueryMakerForInsert in interface SqlEngine

Parameters:

targetDataSource - datasource for the INSERT portion of the query

relRoot - planned and validated rel for the SELECT portion of the query

plannerContext - context for this query

Returns:

an executor for the provided query