org.apache.calcite.sql2rel

Interface SqlToRelConverter.Config

Enclosing class:

SqlToRelConverter

public static interface SqlToRelConverter.Config

Interface to define the configuration for a SqlToRelConverter. Provides methods to set each configuration option.

See Also:

SqlToRelConverter.ConfigBuilder, SqlToRelConverter.configBuilder()

Field Summary

Fields

Modifier and Type	Field and Description
static SqlToRelConverter.Config	DEFAULT Default configuration.

Method Summary

Modifier and Type	Method and Description
int	getInSubQueryThreshold() Returns the inSubQueryThreshold option, default SqlToRelConverter.DEFAULT_IN_SUB_QUERY_THRESHOLD.
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.

Field Detail

DEFAULT

static final SqlToRelConverter.Config DEFAULT

Default configuration.

Method Detail

isConvertTableAccess

boolean isConvertTableAccess()

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.

isDecorrelationEnabled

boolean isDecorrelationEnabled()

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

isTrimUnusedFields

boolean isTrimUnusedFields()

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

isCreateValuesRel

boolean isCreateValuesRel()

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

isExplain

boolean isExplain()

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

isExpand

boolean isExpand()

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

getInSubQueryThreshold

int getInSubQueryThreshold()

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, boolean) 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.