org.apache.calcite.sql.validate

Class MatchRecognizeScope

java.lang.Object

org.apache.calcite.sql.validate.DelegatingScope

org.apache.calcite.sql.validate.ListScope

org.apache.calcite.sql.validate.MatchRecognizeScope

All Implemented Interfaces:

SqlValidatorScope

public class MatchRecognizeScope
extends ListScope

Scope for expressions in a MATCH_RECOGNIZE clause.

Defines variables and uses them as prefix of columns reference.

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 SqlMatchRecognize	matchRecognize
private Set<String>	patternVars
private static String	STAR

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
MatchRecognizeScope(SqlValidatorScope parent, SqlMatchRecognize matchRecognize) Creates a MatchRecognizeScope.

Method Summary

Modifier and Type	Method and Description
void	addPatternVar(String str)
Map<String,ScopeChild>	findQualifyingTableNames(String columnName, SqlNode ctx, SqlNameMatcher nameMatcher) Finds all table aliases which are implicitly qualifying an unqualified column name.
SqlMatchRecognize	getMatchRecognize()
SqlNode	getNode() Returns the root node of this scope.
Set<String>	getPatternVars()
void	resolve(List<String> names, SqlNameMatcher nameMatcher, boolean deep, SqlValidatorScope.Resolved resolved) Looks up a node with a given name.

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

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

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

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

Methods inherited from class java.lang.Object

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

Field Detail

STAR

private static final String STAR

See Also:

Constant Field Values

matchRecognize

private final SqlMatchRecognize matchRecognize

patternVars

private final Set<String> patternVars

Constructor Detail

MatchRecognizeScope

public MatchRecognizeScope(SqlValidatorScope parent,
                           SqlMatchRecognize matchRecognize)

Creates a MatchRecognizeScope.

Method Detail

getNode

public SqlNode getNode()

Description copied from interface: SqlValidatorScope

Returns the root node of this scope. Never null.

getMatchRecognize

public SqlMatchRecognize getMatchRecognize()

getPatternVars

public Set<String> getPatternVars()

addPatternVar

public void addPatternVar(String str)

findQualifyingTableNames

public Map<String,ScopeChild> findQualifyingTableNames(String columnName,
                                                       SqlNode ctx,
                                                       SqlNameMatcher nameMatcher)

Description copied from interface: SqlValidatorScope

Finds all table aliases which are implicitly qualifying an unqualified column name.

This method is only implemented in scopes (such as SelectScope) which can be the context for name-resolution. In scopes such as IdentifierNamespace, it throws UnsupportedOperationException.

Specified by:

findQualifyingTableNames in interface SqlValidatorScope

Overrides:

findQualifyingTableNames in class ListScope

Parameters:

columnName - Column name

ctx - Validation context, to appear in any error thrown

nameMatcher - Name matcher

Returns:

Map of applicable table alias and namespaces, never null, empty if no aliases found

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