net.sf.saffron.sql
Class SqlValidator.SelectScope

java.lang.Object
  |
  +--net.sf.saffron.sql.SqlValidator.Scope
        |
        +--net.sf.saffron.sql.SqlValidator.SelectScope

Enclosing class:

SqlValidator

public class SqlValidator.SelectScope

extends SqlValidator.Scope

The name-resolution scope of a SELECT clause. The objects visible are those in the FROM clause, and objects inherited from the parent scope.

Field Summary

private ArrayList	children List of child scopes, set on validate.
private ArrayList	childrenNames Aliases of the child scopes, set on validate.
private SaffronType	rowType Type of the output row, which comprises the name and type of each output column.
SqlSelect	select
private int	validateCount

Fields inherited from class net.sf.saffron.sql.SqlValidator.Scope

parent

Constructor Summary

(package private)

SqlValidator.SelectScope(SqlValidator.Scope parent, SqlSelect select, String alias)

Method Summary

protected String	findQualifyingTableName(String columnName)
private SqlValidator.Scope	getChild(String alias)
(package private) SqlNode	getNode()
SaffronType	getRowType() Returns a list of names of output columns.
SqlValidator.Scope	resolve(String name, SqlValidator.Scope[] ancestorOut, int[] offsetOut) Looks up a node with a given name.
SaffronType	resolveColumn(String name)
void	validate()

Methods inherited from class net.sf.saffron.sql.SqlValidator.Scope

deriveAlias, fullyQualify, getAlias, getScopeFromNode, getTable

Methods inherited from class java.lang.Object

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

Field Detail

validateCount

private int validateCount

select

public final SqlSelect select

children

private final ArrayList children

List of child scopes, set on validate.

childrenNames

private final ArrayList childrenNames

Aliases of the child scopes, set on validate.

rowType

private SaffronType rowType

Type of the output row, which comprises the name and type of each output column. Set on validate.

Constructor Detail

SqlValidator.SelectScope

SqlValidator.SelectScope(SqlValidator.Scope parent,
                         SqlSelect select,
                         String alias)

Method Detail

findQualifyingTableName

protected String findQualifyingTableName(String columnName)

Overrides:

findQualifyingTableName in class SqlValidator.Scope

getRowType

public SaffronType getRowType()

Description copied from class: SqlValidator.Scope

Returns a list of names of output columns.

Specified by:

getRowType in class SqlValidator.Scope

validate

public void validate()

Overrides:

validate in class SqlValidator.Scope

getNode

SqlNode getNode()

Specified by:

getNode in class SqlValidator.Scope

getChild

private SqlValidator.Scope getChild(String alias)

resolve

public SqlValidator.Scope resolve(String name,
                                  SqlValidator.Scope[] ancestorOut,
                                  int[] offsetOut)

Description copied from class: SqlValidator.Scope

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

Overrides:

resolve in class SqlValidator.Scope

Parameters:

name - Name of node to find

ancestorOut - If not null, writes the ancestor scope here

offsetOut - If not null, writes the offset within the ancestor here

resolveColumn

public SaffronType resolveColumn(String name)