org.apache.calcite.sql.validate

Class GroupByScope

java.lang.Object

org.apache.calcite.sql.validate.DelegatingScope

org.apache.calcite.sql.validate.GroupByScope

All Implemented Interfaces:

SqlValidatorScope

public class GroupByScope
extends DelegatingScope

Represents the name-resolution context for expressions in an GROUP BY clause.

In some dialects of SQL, the GROUP BY clause can reference column aliases in the SELECT clause. For example, the query

SELECT empno AS x
FROM emp
GROUP BY x

is valid.

Nested Class Summary

Nested classes/interfaces inherited from interface org.apache.calcite.sql.validate.SqlValidatorScope

SqlValidatorScope.EmptyPath, SqlValidatorScope.Path, SqlValidatorScope.Resolve, SqlValidatorScope.Resolved, SqlValidatorScope.ResolvedImpl, SqlValidatorScope.Step

Field Summary

Fields

Modifier and Type	Field and Description
private SqlNodeList	groupByList
private SqlSelect	select

Fields inherited from class org.apache.calcite.sql.validate.DelegatingScope

parent, validator

Constructor Summary

Constructors

Constructor and Description
GroupByScope(SqlValidatorScope parent, SqlNodeList groupByList, SqlSelect select)

Method Summary

Modifier and Type	Method and Description
SqlNode	getNode() Returns the root node of this scope.
void	validateExpr(SqlNode expr) Performs any scope-specific validation of an expression.

Methods inherited from class org.apache.calcite.sql.validate.DelegatingScope

addChild, addColumnNames, findAliases, findAllColumnNames, findQualifyingTableName, findQualifyingTableNames, fullyQualify, getMonotonicity, getOperandScope, getOrderList, getParent, getTableNamespace, getValidator, lookupWindow, nullifyType, resolve, resolveColumn, resolveInNamespace, resolveTable

Methods inherited from class java.lang.Object

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

Field Detail

groupByList

private final SqlNodeList groupByList

select

private final SqlSelect select

Constructor Detail

GroupByScope

GroupByScope(SqlValidatorScope parent,
             SqlNodeList groupByList,
             SqlSelect select)

Method Detail

getNode

public SqlNode getNode()

Description copied from interface: SqlValidatorScope

Returns the root node of this scope. Never null.

validateExpr

public void validateExpr(SqlNode expr)

Description copied from interface: SqlValidatorScope

Performs any scope-specific validation of an expression. For example, an aggregating scope requires that expressions are valid aggregations. The expression has already been validated.

Specified by:

validateExpr in interface SqlValidatorScope

Overrides:

validateExpr in class DelegatingScope