org.apache.druid.sql.calcite.expression.builtin

Class NestedDataOperatorConversions.DruidJsonValueConvertletFactory

java.lang.Object

org.apache.druid.sql.calcite.expression.builtin.NestedDataOperatorConversions.DruidJsonValueConvertletFactory

All Implemented Interfaces:

DruidConvertletFactory

Enclosing class:

NestedDataOperatorConversions

public static class NestedDataOperatorConversions.DruidJsonValueConvertletFactory
extends Object
implements DruidConvertletFactory

The StandardConvertletTable converts json_value(.. RETURNING type) into cast(json_value_any(..), type). This is not that useful for us, so we have our own convertlet, to translate into specialized operators such as NestedDataOperatorConversions.JsonValueBigintOperatorConversion, NestedDataOperatorConversions.JsonValueDoubleOperatorConversion, or NestedDataOperatorConversions.JsonValueVarcharOperatorConversion, before falling back to NestedDataOperatorConversions.JsonValueAnyOperatorConversion. This convertlet still always wraps the function in a SqlStdOperatorTable.CAST, to smooth out type mismatches, such as VARCHAR(2000) vs VARCHAR or whatever else various type checkers like to complain about not exactly matching.

Constructor Summary

Constructors

Constructor and Description
DruidJsonValueConvertletFactory()

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.sql2rel.SqlRexConvertlet	createConvertlet(PlannerContext plannerContext)
List<org.apache.calcite.sql.SqlOperator>	operators() Operators that this convertlet can handle.

Methods inherited from class java.lang.Object

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

Constructor Detail

DruidJsonValueConvertletFactory

public DruidJsonValueConvertletFactory()

Method Detail

createConvertlet

public org.apache.calcite.sql2rel.SqlRexConvertlet createConvertlet(PlannerContext plannerContext)

Specified by:

createConvertlet in interface DruidConvertletFactory

operators

public List<org.apache.calcite.sql.SqlOperator> operators()

Description copied from interface: DruidConvertletFactory

Operators that this convertlet can handle.

Specified by:

operators in interface DruidConvertletFactory