org.apache.calcite.sql.validate

Class AggVisitor

java.lang.Object

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

org.apache.calcite.sql.validate.AggVisitor

All Implemented Interfaces:

SqlVisitor<Void>

Direct Known Subclasses:

AggFinder, AggFinder.AggIterable

abstract class AggVisitor
extends SqlBasicVisitor<Void>

Visitor that can find aggregate and windowed aggregate functions.

See Also:

AggFinder

Nested Class Summary

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
protected boolean	aggregate Whether to find regular (non-windowed) aggregates.
protected AggFinder	delegate
protected boolean	group Whether to find group functions (e.g.
protected SqlOperatorTable	opTab
protected boolean	over Whether to find windowed aggregates.

Constructor Summary

Constructors

Constructor and Description
AggVisitor(SqlOperatorTable opTab, boolean over, boolean aggregate, boolean group, AggFinder delegate) Creates an AggVisitor.

Method Summary

Modifier and Type	Method and Description
protected abstract Void	found(SqlCall call)
Void	visit(SqlCall call) Visits a call to a SqlOperator.

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

visit, 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

opTab

protected final SqlOperatorTable opTab

over

protected final boolean over

Whether to find windowed aggregates.

delegate

protected final AggFinder delegate

aggregate

protected boolean aggregate

Whether to find regular (non-windowed) aggregates.

group

protected boolean group

Whether to find group functions (e.g. TUMBLE) or group auxiliary functions (e.g. TUMBLE_START).

Constructor Detail

AggVisitor

AggVisitor(SqlOperatorTable opTab,
           boolean over,
           boolean aggregate,
           boolean group,
           AggFinder delegate)

Creates an AggVisitor.

Parameters:

opTab - Operator table

over - Whether to find windowed function calls agg(x) OVER windowSpec

aggregate - Whether to find non-windowed aggregate calls

group - Whether to find group functions (e.g. TUMBLE)

delegate - Finder to which to delegate when processing the arguments

Method Detail

visit

public Void visit(SqlCall call)

Description copied from interface: SqlVisitor

Visits a call to a SqlOperator.

Specified by:

visit in interface SqlVisitor<Void>

Overrides:

visit in class SqlBasicVisitor<Void>

Parameters:

call - Call

See Also:

SqlCall.accept(SqlVisitor)

found

protected abstract Void found(SqlCall call)