Package org.apache.druid.sql.calcite.external

Class DruidUserDefinedTableMacroConversion

java.lang.Object

org.apache.druid.sql.calcite.external.DruidUserDefinedTableMacroConversion

All Implemented Interfaces:

SqlOperatorConversion

Direct Known Subclasses:

HttpOperatorConversion, InlineOperatorConversion, LocalOperatorConversion

public abstract class DruidUserDefinedTableMacroConversion
extends Object
implements SqlOperatorConversion

Operator conversion for user-defined table macros (functions) based on the TableFunction abstraction defined by the catalog.

Constructor Summary

Constructors

Constructor	Description
DruidUserDefinedTableMacroConversion(String name, TableFunction fn, com.fasterxml.jackson.databind.ObjectMapper jsonMapper)
DruidUserDefinedTableMacroConversion(String name, TableDefnRegistry registry, String tableType, com.fasterxml.jackson.databind.ObjectMapper jsonMapper)

Method Summary

Modifier and Type	Method	Description
org.apache.calcite.sql.SqlOperator	calciteOperator()	Returns the SQL operator corresponding to this function.
DruidExpression	toDruidExpression(PlannerContext plannerContext, RowSignature rowSignature, org.apache.calcite.rex.RexNode rexNode)	Translate a Calcite RexNode to a Druid expression.

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.expression.SqlOperatorConversion

toDruidExpressionWithPostAggOperands, toDruidFilter, toPostAggregator

Constructor Details

DruidUserDefinedTableMacroConversion

public DruidUserDefinedTableMacroConversion(String name,
 TableDefnRegistry registry,
 String tableType,
 com.fasterxml.jackson.databind.ObjectMapper jsonMapper)

DruidUserDefinedTableMacroConversion

public DruidUserDefinedTableMacroConversion(String name,
 TableFunction fn,
 com.fasterxml.jackson.databind.ObjectMapper jsonMapper)

Method Details

calciteOperator

public org.apache.calcite.sql.SqlOperator calciteOperator()

Description copied from interface: SqlOperatorConversion

Returns the SQL operator corresponding to this function. Should be a singleton.

Specified by:

calciteOperator in interface SqlOperatorConversion

Returns:

operator

toDruidExpression

@Nullable
public DruidExpression toDruidExpression(PlannerContext plannerContext,
 RowSignature rowSignature,
 org.apache.calcite.rex.RexNode rexNode)

Description copied from interface: SqlOperatorConversion

Translate a Calcite RexNode to a Druid expression.

Specified by:

toDruidExpression in interface SqlOperatorConversion

Parameters:

plannerContext - SQL planner context

rowSignature - signature of the rows to be extracted from

rexNode - expression meant to be applied on top of the rows

Returns:

Druid expression, or null if translation is not possible

See Also:

• Expressions.toDruidExpression(PlannerContext, RowSignature, RexNode)