org.apache.calcite.prepare

Class Prepare.PreparedExplain

java.lang.Object

org.apache.calcite.prepare.Prepare.PreparedExplain

All Implemented Interfaces:

Prepare.PreparedResult

Enclosing class:

Prepare

public abstract static class Prepare.PreparedExplain
extends Object
implements Prepare.PreparedResult

PreparedExplanation is a PreparedResult for an EXPLAIN PLAN statement. It's always good to have an explanation prepared.

Constructor Summary

Constructors

Constructor and Description
Prepare.PreparedExplain(RelDataType rowType, RelDataType parameterRowType, RelNode rel, boolean asXml, SqlExplainLevel detailLevel)

Method Summary

Methods

Modifier and Type	Method and Description
abstract Bindable	getBindable() Executes the prepared result.
String	getCode() Returns the code generated by preparation.
List<List<String>>	getFieldOrigins() Returns a list describing, for each result field, the origin of the field as a 4-element list of (database, schema, table, column).
RelDataType	getParameterRowType() Returns a record type whose fields are the parameters of this statement.
RelNode	getRel()
TableModify.Operation	getTableModOp() Returns the table modification operation corresponding to this statement if it is a table modification statement; otherwise null.
boolean	isDml() Returns whether this result is for a DML statement, in which case the result set is one row with one column containing the number of rows affected.

Methods inherited from class java.lang.Object

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

Constructor Detail

Prepare.PreparedExplain

public Prepare.PreparedExplain(RelDataType rowType,
                       RelDataType parameterRowType,
                       RelNode rel,
                       boolean asXml,
                       SqlExplainLevel detailLevel)

Method Detail

getCode

public String getCode()

Description copied from interface: Prepare.PreparedResult

Returns the code generated by preparation.

Specified by:

getCode in interface Prepare.PreparedResult

getParameterRowType

public RelDataType getParameterRowType()

Description copied from interface: Prepare.PreparedResult

Returns a record type whose fields are the parameters of this statement.

Specified by:

getParameterRowType in interface Prepare.PreparedResult

isDml

public boolean isDml()

Description copied from interface: Prepare.PreparedResult

Returns whether this result is for a DML statement, in which case the result set is one row with one column containing the number of rows affected.

Specified by:

isDml in interface Prepare.PreparedResult

getTableModOp

public TableModify.Operation getTableModOp()

Description copied from interface: Prepare.PreparedResult

Returns the table modification operation corresponding to this statement if it is a table modification statement; otherwise null.

Specified by:

getTableModOp in interface Prepare.PreparedResult

getFieldOrigins

public List<List<String>> getFieldOrigins()

Description copied from interface: Prepare.PreparedResult

Returns a list describing, for each result field, the origin of the field as a 4-element list of (database, schema, table, column).

Specified by:

getFieldOrigins in interface Prepare.PreparedResult

getRel

public RelNode getRel()

getBindable

public abstract Bindable getBindable()

Description copied from interface: Prepare.PreparedResult

Executes the prepared result.

Specified by:

getBindable in interface Prepare.PreparedResult

Returns:

producer of rows resulting from execution