org.apache.calcite.sql.validate

Class WithScope

java.lang.Object

org.apache.calcite.sql.validate.DelegatingScope

org.apache.calcite.sql.validate.ListScope

org.apache.calcite.sql.validate.WithScope

All Implemented Interfaces:

SqlValidatorScope

class WithScope
extends ListScope

Scope providing the objects that are available after evaluating an item in a WITH clause.

For example, in

WITH t1 AS (q1) t2 AS (q2) q3

t1 provides a scope that is used to validate q2 (and therefore q2 may reference t1), and t2 provides a scope that is used to validate q3 (and therefore q3 may reference t1 and t2).

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 SqlWithItem	withItem

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

children

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

parent, validator

Constructor Summary

Constructors

Constructor and Description
WithScope(SqlValidatorScope parent, SqlWithItem withItem) Creates a WithScope.

Method Summary

Modifier and Type	Method and Description
SqlNode	getNode() Returns the root node of this scope.
SqlValidatorNamespace	getTableNamespace(List<String> names)
void	resolve(List<String> names, SqlNameMatcher nameMatcher, boolean deep, SqlValidatorScope.Resolved resolved) Looks up a node with a given name.
void	resolveTable(List<String> names, SqlNameMatcher nameMatcher, SqlValidatorScope.Path path, SqlValidatorScope.Resolved resolved) Looks up a table in this scope from its name.

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

addChild, findAliases, findAllColumnNames, findQualifyingTableName, findQualifyingTableNames, getChildNames, getChildren, resolveColumn

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

addColumnNames, fullyQualify, getMonotonicity, getOperandScope, getOrderList, getParent, getValidator, lookupWindow, nullifyType, resolveInNamespace, validateExpr

Methods inherited from class java.lang.Object

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

Field Detail

withItem

private final SqlWithItem withItem

Constructor Detail

WithScope

WithScope(SqlValidatorScope parent,
          SqlWithItem withItem)

Creates a WithScope.

Method Detail

getNode

public SqlNode getNode()

Description copied from interface: SqlValidatorScope

Returns the root node of this scope. Never null.

getTableNamespace

public SqlValidatorNamespace getTableNamespace(List<String> names)

Specified by:

getTableNamespace in interface SqlValidatorScope

Overrides:

getTableNamespace in class DelegatingScope

resolveTable

public void resolveTable(List<String> names,
                         SqlNameMatcher nameMatcher,
                         SqlValidatorScope.Path path,
                         SqlValidatorScope.Resolved resolved)

Description copied from interface: SqlValidatorScope

Looks up a table in this scope from its name. If found, calls SqlValidatorScope.resolve(List, SqlNameMatcher, boolean, Resolved). TableNamespace that wraps it. If the "table" is defined in a WITH clause it may be a query, not a table after all.

The name matcher is not null, and one typically uses SqlValidatorCatalogReader.nameMatcher().

Specified by:

resolveTable in interface SqlValidatorScope

Overrides:

resolveTable in class DelegatingScope

Parameters:

names - Name of table, may be qualified or fully-qualified

nameMatcher - Name matcher

path - List of names that we have traversed through so far

resolve

public void resolve(List<String> names,
                    SqlNameMatcher nameMatcher,
                    boolean deep,
                    SqlValidatorScope.Resolved resolved)

Description copied from interface: SqlValidatorScope

Looks up a node with a given name. Returns null if none is found.

Specified by:

resolve in interface SqlValidatorScope

Overrides:

resolve in class ListScope

Parameters:

names - Name of node to find, maybe partially or fully qualified

nameMatcher - Name matcher

deep - Whether to look more than one level deep

resolved - Callback wherein to write the match(es) we find