Package org.apache.calcite.sql.validate

Class AggChecker

java.lang.Object

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

org.apache.calcite.sql.validate.AggChecker

All Implemented Interfaces:

SqlVisitor<java.lang.Void>

class AggChecker
extends SqlBasicVisitor<java.lang.Void>

Visitor which throws an exception if any component of the expression is not a group expression.

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	Description
private boolean	distinct
private java.util.List<SqlNode>	extraExprs
private java.util.List<SqlNode>	groupExprs
private java.util.Deque<SqlValidatorScope>	scopes
private SqlValidatorImpl	validator

Constructor Summary

Constructors

Constructor	Description
AggChecker(SqlValidatorImpl validator, AggregatingScope scope, java.util.List<SqlNode> extraExprs, java.util.List<SqlNode> groupExprs, boolean distinct)	Creates an AggChecker.

Method Summary

Modifier and Type	Method	Description
(package private) boolean	isGroupExpr(SqlNode expr)
java.lang.Void	visit(SqlCall call)	Visits a call to a SqlOperator.
java.lang.Void	visit(SqlIdentifier id)	Visits an identifier.

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

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

scopes

private final java.util.Deque<SqlValidatorScope> scopes

extraExprs

private final java.util.List<SqlNode> extraExprs

groupExprs

private final java.util.List<SqlNode> groupExprs

distinct

private boolean distinct

validator

private SqlValidatorImpl validator

Constructor Detail

AggChecker

AggChecker(SqlValidatorImpl validator,
           AggregatingScope scope,
           java.util.List<SqlNode> extraExprs,
           java.util.List<SqlNode> groupExprs,
           boolean distinct)

Creates an AggChecker.

Parameters:

validator - Validator

scope - Scope

groupExprs - Expressions in GROUP BY (or SELECT DISTINCT) clause, that are therefore available

distinct - Whether aggregation checking is because of a SELECT DISTINCT clause

Method Detail

isGroupExpr

boolean isGroupExpr(SqlNode expr)

visit

public java.lang.Void visit(SqlIdentifier id)

Description copied from interface: SqlVisitor

Visits an identifier.

Specified by:

visit in interface SqlVisitor<java.lang.Void>

Overrides:

visit in class SqlBasicVisitor<java.lang.Void>

Parameters:

id - identifier

See Also:

SqlIdentifier.accept(SqlVisitor)

visit

public java.lang.Void visit(SqlCall call)

Description copied from interface: SqlVisitor

Visits a call to a SqlOperator.

Specified by:

visit in interface SqlVisitor<java.lang.Void>

Overrides:

visit in class SqlBasicVisitor<java.lang.Void>

Parameters:

call - Call

See Also:

SqlCall.accept(SqlVisitor)