Package org.apache.calcite.sql.validate

Class SqlLambdaScope

java.lang.Object

org.apache.calcite.sql.validate.DelegatingScope

org.apache.calcite.sql.validate.ListScope

org.apache.calcite.sql.validate.SqlLambdaScope

All Implemented Interfaces:

SqlValidatorScope

public class SqlLambdaScope
extends ListScope

Scope for a LAMBDA EXPRESSION.

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 inherited from class org.apache.calcite.sql.validate.ListScope

children

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

parent, resolved, validator

Constructor Summary

Constructors

Constructor	Description
SqlLambdaScope(SqlValidatorScope parent, SqlLambda lambdaExpr)

Method Summary

Modifier and Type	Method	Description
SqlQualified	fullyQualify(SqlIdentifier identifier)	Converts an identifier into a fully-qualified identifier.
SqlNode	getNode()	Returns the root node of this scope.
Map<String,RelDataType>	getParameterTypes()
@Nullable RelDataType	resolveColumn(String columnName, SqlNode ctx)	Resolves a single identifier to a column, and returns the datatype of that column.

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

addChild, findAliases, findAllColumnNames, findQualifyingTableName, findQualifyingTableNames, getChildren, isChildNullable, resolve

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

addColumnNames, analyze, getMonotonicity, getOperandScope, getOrderList, getParent, getTableNamespace, getValidator, lookupWindow, nullifyType, resolveTable, validateExpr

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.apache.calcite.sql.validate.SqlValidatorScope

isMeasureRef, isWithin

Constructor Details

SqlLambdaScope

public SqlLambdaScope(SqlValidatorScope parent,
 SqlLambda lambdaExpr)

Method Details

getNode

public SqlNode getNode()

Description copied from interface: SqlValidatorScope

Returns the root node of this scope. Never null.

fullyQualify

public SqlQualified fullyQualify(SqlIdentifier identifier)

Description copied from class: DelegatingScope

Converts an identifier into a fully-qualified identifier. For example, the "empno" in "select empno from emp natural join dept" becomes "emp.empno".

If the identifier cannot be resolved, throws. Never returns null.

Specified by:

fullyQualify in interface SqlValidatorScope

Overrides:

fullyQualify in class DelegatingScope

Returns:

A qualified identifier, never null

resolveColumn

public @Nullable RelDataType resolveColumn(String columnName,
 SqlNode ctx)

Description copied from interface: SqlValidatorScope

Resolves a single identifier to a column, and returns the datatype of that column.

If it cannot find the column, returns null. If the column is ambiguous, throws an error with context ctx.

Specified by:

resolveColumn in interface SqlValidatorScope

Overrides:

resolveColumn in class ListScope

Parameters:

columnName - Name of column

ctx - Context for exception

Returns:

Type of column, if found and unambiguous; null if not found

getParameterTypes

public Map<String,RelDataType> getParameterTypes()