org.apache.calcite.sql.validate

Class SqlValidatorImpl.NavigationExpander

java.lang.Object

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

org.apache.calcite.sql.util.SqlShuttle

org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationModifier

org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationExpander

All Implemented Interfaces:

SqlVisitor<SqlNode>

Enclosing class:

SqlValidatorImpl

private static class SqlValidatorImpl.NavigationExpander
extends SqlValidatorImpl.NavigationModifier

Shuttle that expands navigation expressions in a MATCH_RECOGNIZE clause.

Examples:

• PREV(A.price + A.amount) → PREV(A.price) + PREV(A.amount)
• FIRST(A.price * 2) → FIRST(A.PRICE) * 2

Nested Class Summary

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

SqlShuttle.CallCopyingArgHandler

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

SqlBasicVisitor.ArgHandler<R>, SqlBasicVisitor.ArgHandlerImpl<R>

Field Summary

Fields

Modifier and Type	Field and Description
(package private) SqlNode	offset
(package private) SqlOperator	op

Constructor Summary

Constructors

Constructor and Description
NavigationExpander()
NavigationExpander(SqlOperator operator, SqlNode offset)

Method Summary

Modifier and Type	Method and Description
SqlNode	visit(SqlCall call) Visits a call to a SqlOperator.
SqlNode	visit(SqlIdentifier id) Visits an identifier.

Methods inherited from class org.apache.calcite.sql.validate.SqlValidatorImpl.NavigationModifier

go

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

Field Detail

op

final SqlOperator op

offset

final SqlNode offset

Constructor Detail

NavigationExpander

NavigationExpander()

NavigationExpander

NavigationExpander(SqlOperator operator,
                   SqlNode offset)

Method Detail

visit

public SqlNode visit(SqlCall call)

Description copied from interface: SqlVisitor

Visits a call to a SqlOperator.

Specified by:

visit in interface SqlVisitor<SqlNode>

Overrides:

visit in class SqlShuttle

Parameters:

call - Call

See Also:

SqlCall.accept(SqlVisitor)

visit

public SqlNode visit(SqlIdentifier id)

Description copied from interface: SqlVisitor

Visits an identifier.

Specified by:

visit in interface SqlVisitor<SqlNode>

Overrides:

visit in class SqlShuttle

Parameters:

id - identifier

See Also:

SqlIdentifier.accept(SqlVisitor)