Package gudusoft.gsqlparser.nodes

Class TFromClause

Object

gudusoft.gsqlparser.nodes.TParseTreeNode

gudusoft.gsqlparser.nodes.TNodeWithAliasClause

gudusoft.gsqlparser.nodes.TFromClause

All Implemented Interfaces:

IRelation, Visitable, Iterator<TSourceToken>

public class TFromClause
extends TNodeWithAliasClause
implements IRelation

Field Summary

Fields inherited from class gudusoft.gsqlparser.nodes.TParseTreeNode

dbvendor, doubleLinkedTokenListToString, nodeActionAppend, nodeActionInsert, nodeActionRemove, nodeActionUnknown, nodeActionUpdate, nodeActionUpdateText, nodeChangeEndToken, nodeChangeStartToken

Constructor Summary

Constructors

Constructor	Description
TFromClause(ArrayList<TTable> relations)

Method Summary

Modifier and Type	Method	Description
void	accept(TParseTreeVisitor v)	Accept a visitor
void	acceptChildren(TParseTreeVisitor v)	Accept visitor to visit this class.
void	collectAttributes()
ArrayList<TAttributeNode>	getAttributes()	每个 relation 包含的 attributes 当它为 base table 时，这些 attributes 的来源有三种可能 1.
String	getRelationName()
ArrayList<TTable>	getRelations()
int	size()

Methods inherited from class gudusoft.gsqlparser.nodes.TNodeWithAliasClause

getAliasClause, setAliasClause, toString

Methods inherited from class gudusoft.gsqlparser.nodes.TParseTreeNode

addAllMyTokensToTokenList, addToTokenChain, appendNewNode, calculateTokenCount, doAppendNewNode, doParse, fastSetString, getAnchorNode, getColumnNo, getCommentAfterNode, getCommentBeforeNode, getCompactString, getDummyTag, getEndToken, getEvaluateDatatype, getEvalValue, getGsqlparser, getLineNo, getLocation, getMd5, getNodeStatus, getNodeType, getParentObjectName, getPlainText, getStartToken, getTokenCount, hasNext, init, init, init, init, init, init, insertAfterAToken, insertNewNodeBeforeMe, isChanged, isTokensInChain, next, refreshAllNodesTokenCount, remove, removeAllMyTokensFromTokenList, removeTokens, removeTokensBetweenNodes, removeTokensBetweenToken, replaceWithNewNode, resetIterator, setAnchorNode, setChanged, setDummyTag, setEndToken, setEndToken, setEndToken, setEndToken, setEndToken, setEndTokenDirectly, setEvaluateDatatype, setEvalValue, setGsqlparser, setIncludingComment, setLocation, setNewSubNode, setNodeStatus, setNodeType, setParent, setPlainText, setStartToken, setStartToken, setStartToken, setStartToken, setStartTokenDirectly, setString, setString2, subNodeInNode, toScript, toString2

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.Iterator

forEachRemaining

Constructor Details

TFromClause

public TFromClause(ArrayList<TTable> relations)

Method Details

getAttributes

public ArrayList<TAttributeNode> getAttributes()

Description copied from interface: IRelation

每个 relation 包含的 attributes 当它为 base table 时，这些 attributes 的来源有三种可能 1. 来自数据库的 metadata，第一次 resolve 时就可以获取，来自 sqlenv 2. 来自 create table ddl，第一次 resolve 时就可以获取，来自 sqlenv 3. 来自 sql script，第二次 resolve 时，来自relation的 referenceAttribute 属性。 第一、二中来源是可靠的来源，attributes应该是完整的，第三种推断自 sql script，attributes很可能是不完整的。

Specified by:

getAttributes in interface IRelation

Returns:

getRelationName

public String getRelationName()

Specified by:

getRelationName in interface IRelation

size

public int size()

Specified by:

size in interface IRelation

collectAttributes

public void collectAttributes()

getRelations

public ArrayList<TTable> getRelations()

accept

public void accept(TParseTreeVisitor v)

Description copied from class: TParseTreeNode

Accept a visitor

Specified by:

accept in interface Visitable

Overrides:

accept in class TParseTreeNode

Parameters:

v - visitor is a descendant class of TParseTreeVisitor

acceptChildren

public void acceptChildren(TParseTreeVisitor v)

Accept visitor to visit this class.

Specified by:

acceptChildren in interface Visitable

Overrides:

acceptChildren in class TParseTreeNode

Parameters:

v - user defined visitor.