JdbcToSparkConverterRule (Apache Calcite API)

java.lang.Object
- org.apache.calcite.plan.RelOptRule
- - org.apache.calcite.rel.convert.ConverterRule
  - - org.apache.calcite.adapter.spark.JdbcToSparkConverterRule

```
public class JdbcToSparkConverterRule
extends ConverterRule
```
Rule to convert a relational expression from JdbcConvention to Spark convention.

- Field Summary
  - Fields inherited from class org.apache.calcite.plan.RelOptRule
    description, operands, relBuilderFactory
- Constructor Summary
  
  Constructors
  Constructor Description
  
  JdbcToSparkConverterRule(JdbcConvention out, RelBuilderFactory relBuilderFactory)
  Creates a JdbcToSparkConverterRule.
- Method Summary
  
  All Methods Instance Methods Concrete Methods
  Modifier and Type Method Description
  
  RelNode convert(RelNode rel)
  Converts a relational expression to the target trait(s) of this rule.
  - Methods inherited from class org.apache.calcite.rel.convert.ConverterRule
    getInTrait, getOutConvention, getOutTrait, getTraitDef, isGuaranteed, onMatch
  - Methods inherited from class org.apache.calcite.plan.RelOptRule
    any, convert, convert, convertList, convertOperand, convertOperand, equals, equals, getOperand, getOperands, hashCode, matches, none, operand, operand, operand, operand, operand, operandJ, operandJ, some, toString, unordered
  - Methods inherited from class java.lang.Object
    clone, finalize, getClass, notify, notifyAll, wait, wait, wait

- Constructor Detail
  - JdbcToSparkConverterRule
```
public JdbcToSparkConverterRule(JdbcConvention out,
                                RelBuilderFactory relBuilderFactory)
```
    Creates a JdbcToSparkConverterRule.
- Method Detail
  - convert
```
public RelNode convert(RelNode rel)
```
    Description copied from class: ConverterRule
    
    Converts a relational expression to the target trait(s) of this rule.
    Returns null if conversion is not possible.
    
    Specified by:
    
    convert in class ConverterRule