org.apache.druid.sql.calcite.planner

Class PrepareResult

java.lang.Object

org.apache.druid.sql.calcite.planner.PrepareResult

public class PrepareResult
extends Object

After preparing an SQL query with DruidPlanner, the artifacts produced are the output signature of the result row, and type information for any dynamic parameters which must be bound before planning the query.

Constructor Summary

Constructors

Constructor and Description
PrepareResult(org.apache.calcite.rel.type.RelDataType validatedRowType, org.apache.calcite.rel.type.RelDataType returnedRowType, org.apache.calcite.rel.type.RelDataType parameterRowType)

Method Summary

Modifier and Type	Method and Description
org.apache.calcite.rel.type.RelDataType	getParameterRowType() Row type from SqlValidator.getParameterRowType(org.apache.calcite.sql.SqlNode) containing the name and type of each parameter.
org.apache.calcite.rel.type.RelDataType	getReturnedRowType() Row type for the result that the end user will receive.
org.apache.calcite.rel.type.RelDataType	getValidatedRowType() Row type from RelRoot.validatedRowType prepared by DruidPlanner.prepare().

Methods inherited from class java.lang.Object

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

Constructor Detail

PrepareResult

public PrepareResult(org.apache.calcite.rel.type.RelDataType validatedRowType,
                     org.apache.calcite.rel.type.RelDataType returnedRowType,
                     org.apache.calcite.rel.type.RelDataType parameterRowType)

Method Detail

getValidatedRowType

public org.apache.calcite.rel.type.RelDataType getValidatedRowType()

Row type from RelRoot.validatedRowType prepared by DruidPlanner.prepare(). Corresponds to the SELECT portion of a SQL statement. For SELECT, this is the row type of the SELECT itself. For EXPLAIN PLAN FOR SELECT, INSERT ... SELECT, or REPLACE ... SELECT, this is the row type of the embedded SELECT.

getReturnedRowType

public org.apache.calcite.rel.type.RelDataType getReturnedRowType()

Row type for the result that the end user will receive. Different from getValidatedRowType() in cases like EXPLAIN (where the user gets an explanation, not the query results) and other non-SELECT statements.

getParameterRowType

public org.apache.calcite.rel.type.RelDataType getParameterRowType()

Row type from SqlValidator.getParameterRowType(org.apache.calcite.sql.SqlNode) containing the name and type of each parameter.