net.sf.saffron.sql
Class SqlValidator.JoinScope

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

Enclosing class:

SqlValidator

class SqlValidator.JoinScope

extends SqlValidator.Scope

The name-resolution scope of a JOIN operator. The objects visible are the joined table expressions, and those inherited from the parent scope.

Consider "SELECT * FROM (A JOIN B ON {exp1}) JOIN C ON {exp2}". {exp1} is resolved in the join scope for "A JOIN B", which contains A and B but not C.

Field Summary

private SqlJoin

join

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

parent

Constructor Summary

(package private)

SqlValidator.JoinScope(SqlValidator.Scope parent, SqlJoin join)

Method Summary

(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.
void	validate()

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

deriveAlias, findQualifyingTableName, fullyQualify, getAlias, getScopeFromNode, getTable

Methods inherited from class java.lang.Object

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

Field Detail

join

private final SqlJoin join

Constructor Detail

SqlValidator.JoinScope

SqlValidator.JoinScope(SqlValidator.Scope parent,
                       SqlJoin join)

Method Detail

getNode

SqlNode getNode()

Specified by:

getNode 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

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

validate

public void validate()

Overrides:

validate in class SqlValidator.Scope