org.apache.drill.exec.planner.sql.parser

Class CompoundIdentifierConverter

java.lang.Object

org.apache.calcite.sql.util.SqlBasicVisitor<org.apache.calcite.sql.SqlNode>

org.apache.calcite.sql.util.SqlShuttle

org.apache.drill.exec.planner.sql.parser.CompoundIdentifierConverter

All Implemented Interfaces:

org.apache.calcite.sql.util.SqlVisitor<org.apache.calcite.sql.SqlNode>

public class CompoundIdentifierConverter
extends org.apache.calcite.sql.util.SqlShuttle

Implementation of SqlVisitor that converts bracketed compound SqlIdentifier to bracket-less compound SqlIdentifier (also known as DrillCompoundIdentifier) to provide ease of use while querying complex types.

For example, this visitor converts a['b'][4]['c'] to a.b[4].c

Nested Class Summary

Nested classes/interfaces inherited from class org.apache.calcite.sql.util.SqlShuttle

org.apache.calcite.sql.util.SqlShuttle.CallCopyingArgHandler

Nested classes/interfaces inherited from class org.apache.calcite.sql.util.SqlBasicVisitor

org.apache.calcite.sql.util.SqlBasicVisitor.ArgHandler<R>, org.apache.calcite.sql.util.SqlBasicVisitor.ArgHandlerImpl<R>

Constructor Summary

Constructors

Constructor and Description
CompoundIdentifierConverter()

Method Summary

Methods

Modifier and Type	Method and Description
org.apache.calcite.sql.SqlNode	visit(org.apache.calcite.sql.SqlCall call)
org.apache.calcite.sql.SqlNode	visit(org.apache.calcite.sql.SqlIdentifier id)

Methods inherited from class org.apache.calcite.sql.util.SqlShuttle

visit, visit, visit, visit, visit

Methods inherited from class java.lang.Object

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

Constructor Detail

CompoundIdentifierConverter

public CompoundIdentifierConverter()

Method Detail

visit

public org.apache.calcite.sql.SqlNode visit(org.apache.calcite.sql.SqlIdentifier id)

Specified by:

visit in interface org.apache.calcite.sql.util.SqlVisitor<org.apache.calcite.sql.SqlNode>

Overrides:

visit in class org.apache.calcite.sql.util.SqlShuttle

visit

public org.apache.calcite.sql.SqlNode visit(org.apache.calcite.sql.SqlCall call)

Specified by:

visit in interface org.apache.calcite.sql.util.SqlVisitor<org.apache.calcite.sql.SqlNode>

Overrides:

visit in class org.apache.calcite.sql.util.SqlShuttle