org.apache.calcite.sql2rel

Class SqlToRelConverter.ConfigImpl

java.lang.Object

org.apache.calcite.sql2rel.SqlToRelConverter.ConfigImpl

All Implemented Interfaces:

SqlToRelConverter.Config

Enclosing class:

SqlToRelConverter

private static class SqlToRelConverter.ConfigImpl
extends Object
implements SqlToRelConverter.Config

Implementation of SqlToRelConverter.Config. Called by builder; all values are in private final fields.

Field Summary

Fields

Modifier and Type	Field and Description
private boolean	convertTableAccess
private boolean	createValuesRel
private boolean	decorrelationEnabled
private boolean	expand
private boolean	explain
private int	inSubQueryThreshold
private RelBuilderFactory	relBuilderFactory
private boolean	trimUnusedFields

Fields inherited from interface org.apache.calcite.sql2rel.SqlToRelConverter.Config

DEFAULT

Constructor Summary

Constructors

Modifier	Constructor and Description
private	ConfigImpl(boolean convertTableAccess, boolean decorrelationEnabled, boolean trimUnusedFields, boolean createValuesRel, boolean explain, boolean expand, int inSubQueryThreshold, RelBuilderFactory relBuilderFactory)

Method Summary

Modifier and Type	Method and Description
int	getInSubQueryThreshold() Returns the inSubQueryThreshold option, default SqlToRelConverter.DEFAULT_IN_SUB_QUERY_THRESHOLD.
RelBuilderFactory	getRelBuilderFactory() Returns the factory to create RelBuilder, never null.
boolean	isConvertTableAccess() Returns the convertTableAccess option.
boolean	isCreateValuesRel() Returns the createValuesRel option.
boolean	isDecorrelationEnabled() Returns the decorrelationEnabled option.
boolean	isExpand() Returns the expand option.
boolean	isExplain() Returns the explain option.
boolean	isTrimUnusedFields() Returns the trimUnusedFields option.

Methods inherited from class java.lang.Object

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

Field Detail

convertTableAccess

private final boolean convertTableAccess

decorrelationEnabled

private final boolean decorrelationEnabled

trimUnusedFields

private final boolean trimUnusedFields

createValuesRel

private final boolean createValuesRel

explain

private final boolean explain

expand

private final boolean expand

inSubQueryThreshold

private final int inSubQueryThreshold

relBuilderFactory

private final RelBuilderFactory relBuilderFactory

Constructor Detail

ConfigImpl

private ConfigImpl(boolean convertTableAccess,
                   boolean decorrelationEnabled,
                   boolean trimUnusedFields,
                   boolean createValuesRel,
                   boolean explain,
                   boolean expand,
                   int inSubQueryThreshold,
                   RelBuilderFactory relBuilderFactory)

Method Detail

isConvertTableAccess

public boolean isConvertTableAccess()

Description copied from interface: SqlToRelConverter.Config

Returns the convertTableAccess option. Controls whether table access references are converted to physical rels immediately. The optimizer doesn't like leaf rels to have Convention.NONE. However, if we are doing further conversion passes (e.g. RelStructuredTypeFlattener), then we may need to defer conversion.

Specified by:

isConvertTableAccess in interface SqlToRelConverter.Config

isDecorrelationEnabled

public boolean isDecorrelationEnabled()

Description copied from interface: SqlToRelConverter.Config

Returns the decorrelationEnabled option. Controls whether to disable sub-query decorrelation when needed. e.g. if outer joins are not supported.

Specified by:

isDecorrelationEnabled in interface SqlToRelConverter.Config

isTrimUnusedFields

public boolean isTrimUnusedFields()

Description copied from interface: SqlToRelConverter.Config

Returns the trimUnusedFields option. Controls whether to trim unused fields as part of the conversion process.

Specified by:

isTrimUnusedFields in interface SqlToRelConverter.Config

isCreateValuesRel

public boolean isCreateValuesRel()

Description copied from interface: SqlToRelConverter.Config

Returns the createValuesRel option. Controls whether instances of LogicalValues are generated. These may not be supported by all physical implementations.

Specified by:

isCreateValuesRel in interface SqlToRelConverter.Config

isExplain

public boolean isExplain()

Description copied from interface: SqlToRelConverter.Config

Returns the explain option. Describes whether the current statement is part of an EXPLAIN PLAN statement.

Specified by:

isExplain in interface SqlToRelConverter.Config

isExpand

public boolean isExpand()

Description copied from interface: SqlToRelConverter.Config

Returns the expand option. Controls whether to expand sub-queries. If false, each sub-query becomes a RexSubQuery.

Specified by:

isExpand in interface SqlToRelConverter.Config

getInSubQueryThreshold

public int getInSubQueryThreshold()

Description copied from interface: SqlToRelConverter.Config

Returns the inSubQueryThreshold option, default SqlToRelConverter.DEFAULT_IN_SUB_QUERY_THRESHOLD. Controls the list size threshold under which SqlToRelConverter.convertInToOr(org.apache.calcite.sql2rel.SqlToRelConverter.Blackboard, java.util.List<org.apache.calcite.rex.RexNode>, org.apache.calcite.sql.SqlNodeList, org.apache.calcite.sql.fun.SqlInOperator) is used. Lists of this size or greater will instead be converted to use a join against an inline table (LogicalValues) rather than a predicate. A threshold of 0 forces usage of an inline table in all cases; a threshold of Integer.MAX_VALUE forces usage of OR in all cases.

Specified by:

getInSubQueryThreshold in interface SqlToRelConverter.Config

getRelBuilderFactory

public RelBuilderFactory getRelBuilderFactory()

Description copied from interface: SqlToRelConverter.Config

Returns the factory to create RelBuilder, never null. Default is RelFactories.LOGICAL_BUILDER.

Specified by:

getRelBuilderFactory in interface SqlToRelConverter.Config