Package 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	Description
static final ViewSqlEngine	INSTANCE

Method Summary

Modifier and Type	Method	Description
QueryMaker	buildQueryMakerForInsert(IngestDestination destination, 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	featureAvailable(EngineFeature feature)	Whether a feature applies to this engine or not.
SqlStatementFactory	getSqlStatementFactory()	Returns a SqlStatementFactory which uses this engine to create statements.
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, Map<String,Object> queryContext)	SQL row type that would be emitted by the QueryMaker from SqlEngine.buildQueryMakerForInsert(org.apache.druid.sql.destination.IngestDestination, 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, Map<String,Object> queryContext)	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(Map<String,Object> queryContext)	Validates a provided query context.

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.run.SqlEngine

cancelQuery, getQueries, getQueryReport, initContextMap

Field Details

INSTANCE

public static final ViewSqlEngine INSTANCE

Method Details

name

public String name()

Description copied from interface: SqlEngine

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

Specified by:

name in interface SqlEngine

featureAvailable

public boolean featureAvailable(EngineFeature feature)

Description copied from interface: SqlEngine

Whether a feature applies to this engine or not. Most callers should use PlannerContext.featureAvailable(EngineFeature) instead, which also checks feature flags in context parameters.

Specified by:

featureAvailable in interface SqlEngine

validateContext

public void validateContext(Map<String,Object> 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,
 Map<String,Object> queryContext)

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

queryContext - query context, in case that affects the result type

resultTypeForInsert

public org.apache.calcite.rel.type.RelDataType resultTypeForInsert(org.apache.calcite.rel.type.RelDataTypeFactory typeFactory,
 org.apache.calcite.rel.type.RelDataType validatedRowType,
 Map<String,Object> queryContext)

Description copied from interface: SqlEngine

SQL row type that would be emitted by the QueryMaker from SqlEngine.buildQueryMakerForInsert(org.apache.druid.sql.destination.IngestDestination, 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

queryContext - query context, in case that affects the result type

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(IngestDestination destination,
 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:

destination - destination 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

getSqlStatementFactory

public SqlStatementFactory getSqlStatementFactory()

Description copied from interface: SqlEngine

Returns a SqlStatementFactory which uses this engine to create statements.

Specified by:

getSqlStatementFactory in interface SqlEngine