org.apache.calcite.adapter.spark

Class JdbcToSparkConverter

java.lang.Object

org.apache.calcite.rel.AbstractRelNode

org.apache.calcite.rel.SingleRel

org.apache.calcite.rel.convert.ConverterImpl

org.apache.calcite.adapter.spark.JdbcToSparkConverter

All Implemented Interfaces:

Cloneable, SparkRel, RelOptNode, Converter, RelNode

public class JdbcToSparkConverter
extends ConverterImpl
implements SparkRel

Relational expression representing a scan of a table in a JDBC data source that returns its results as a Spark RDD.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.adapter.spark.SparkRel

SparkRel.Implementor, SparkRel.Result

Nested classes/interfaces inherited from interface org.apache.calcite.rel.RelNode

RelNode.Context

Field Summary

Fields inherited from class org.apache.calcite.rel.convert.ConverterImpl

inTraits, traitDef

Fields inherited from class org.apache.calcite.rel.SingleRel

input

Fields inherited from class org.apache.calcite.rel.AbstractRelNode

digest, id, rowType, traitSet

Fields inherited from interface org.apache.calcite.adapter.spark.SparkRel

CONVENTION

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	JdbcToSparkConverter(RelOptCluster cluster, RelTraitSet traits, RelNode input)

Method Summary

Methods

Modifier and Type	Method and Description
RelOptCost	computeSelfCost(RelOptPlanner planner, RelMetadataQuery mq)
RelNode	copy(RelTraitSet traitSet, List<RelNode> inputs)
private String	generateSql(SqlDialect dialect)
SparkRel.Result	implementSpark(SparkRel.Implementor implementor)

Methods inherited from class org.apache.calcite.rel.convert.ConverterImpl

cannotImplement, getInputTraits, getTraitDef

Methods inherited from class org.apache.calcite.rel.SingleRel

childrenAccept, deriveRowType, estimateRowCount, explainTerms, getInput, getInputs, replaceInput

Methods inherited from class org.apache.calcite.rel.AbstractRelNode

accept, accept, collectVariablesSet, collectVariablesUsed, computeDigest, computeSelfCost, explain, getChildExps, getCluster, getCollationList, getConvention, getCorrelVariable, getDescription, getDigest, getExpectedInputRowType, getId, getInput, getQuery, getRelTypeName, getRows, getRowType, getTable, getTraitSet, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, register, sole, toString

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.rel.RelNode

accept, accept, childrenAccept, collectVariablesSet, collectVariablesUsed, computeSelfCost, estimateRowCount, explain, getChildExps, getCollationList, getConvention, getCorrelVariable, getExpectedInputRowType, getInput, getInputs, getQuery, getRelTypeName, getRows, getRowType, getTable, getVariablesSet, getVariablesStopped, isDistinct, isKey, isValid, isValid, metadata, onRegister, recomputeDigest, register, replaceInput

Methods inherited from interface org.apache.calcite.plan.RelOptNode

getCluster, getDescription, getDigest, getId, getTraitSet

Methods inherited from interface org.apache.calcite.rel.convert.Converter

getInput

Constructor Detail

JdbcToSparkConverter

protected JdbcToSparkConverter(RelOptCluster cluster,
                    RelTraitSet traits,
                    RelNode input)

Method Detail

copy

public RelNode copy(RelTraitSet traitSet,
           List<RelNode> inputs)

Specified by:

copy in interface RelNode

Overrides:

copy in class AbstractRelNode

computeSelfCost

public RelOptCost computeSelfCost(RelOptPlanner planner,
                         RelMetadataQuery mq)

Specified by:

computeSelfCost in interface RelNode

Overrides:

computeSelfCost in class ConverterImpl

implementSpark

public SparkRel.Result implementSpark(SparkRel.Implementor implementor)

Specified by:

implementSpark in interface SparkRel

generateSql

private String generateSql(SqlDialect dialect)