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

Class ExternalOperatorConversion

java.lang.Object

org.apache.druid.sql.calcite.external.DruidExternTableMacroConversion

org.apache.druid.sql.calcite.external.ExternalOperatorConversion

All Implemented Interfaces:

SqlOperatorConversion

public class ExternalOperatorConversion
extends DruidExternTableMacroConversion

Registers the "EXTERN" operator, which is used in queries like

 INSERT INTO dst SELECT * FROM TABLE(EXTERN(
   "<input source>",
   "<input format>",
   "<signature>"))

 INSERT INTO dst SELECT * FROM TABLE(EXTERN(
   inputSource => "<input source>",
   inputFormat => "<input format>"))
   EXTEND (<columns>)
 

Where either the by-position or by-name forms are usable with either a Druid JSON signature, or an SQL EXTEND list of columns. As with all table functions, the EXTEND is optional.

Field Summary

Fields

Modifier and Type	Field	Description
static final String	FUNCTION_NAME
static final String	INPUT_FORMAT_PARAM
static final String	INPUT_SOURCE_PARAM
static final String	SIGNATURE_PARAM

Constructor Summary

Constructors

Constructor	Description
ExternalOperatorConversion(com.fasterxml.jackson.databind.ObjectMapper jsonMapper)

Method Summary

Methods inherited from class org.apache.druid.sql.calcite.external.DruidExternTableMacroConversion

calciteOperator, toDruidExpression

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

Field Details

FUNCTION_NAME

public static final String FUNCTION_NAME

See Also:

• Constant Field Values

INPUT_SOURCE_PARAM

public static final String INPUT_SOURCE_PARAM

See Also:

• Constant Field Values

INPUT_FORMAT_PARAM

public static final String INPUT_FORMAT_PARAM

See Also:

• Constant Field Values

SIGNATURE_PARAM

public static final String SIGNATURE_PARAM

See Also:

• Constant Field Values

Constructor Details

ExternalOperatorConversion

@Inject
public ExternalOperatorConversion(com.fasterxml.jackson.databind.ObjectMapper jsonMapper)