org.apache.phoenix.parse

Class SelectStatementRewriter

java.lang.Object

org.apache.phoenix.parse.BaseParseNodeVisitor<T>

org.apache.phoenix.parse.TraverseAllParseNodeVisitor<ParseNode>

org.apache.phoenix.parse.ParseNodeRewriter

org.apache.phoenix.parse.SelectStatementRewriter

All Implemented Interfaces:

ParseNodeVisitor<ParseNode>

public class SelectStatementRewriter
extends ParseNodeRewriter

Class that creates a new select statement by filtering out nodes. Currently only supports filtering out boolean nodes (i.e. nodes that may be ANDed and ORed together. TODO: generize this

Since:

0.1

Method Summary

Methods

Modifier and Type	Method and Description
static SelectStatement	moveFromHavingToWhereClause(SelectStatement statement, Set<ParseNode> moveNodes) Rewrite the select statement by filtering out expression nodes from the HAVING clause and anding them with the WHERE clause.
static SelectStatement	removeFromWhereClause(SelectStatement statement, Set<ParseNode> removeNodes) Rewrite the select statement by filtering out expression nodes from the WHERE clause
boolean	visitEnter(AndParseNode node)
boolean	visitEnter(ComparisonParseNode node)
boolean	visitEnter(InListParseNode node)
boolean	visitEnter(InParseNode node)
boolean	visitEnter(LikeParseNode node)
boolean	visitEnter(OrParseNode node)
ParseNode	visitLeave(AndParseNode node, List<ParseNode> nodes)
ParseNode	visitLeave(ComparisonParseNode node, List<ParseNode> c)
ParseNode	visitLeave(InListParseNode node, List<ParseNode> c)
ParseNode	visitLeave(InParseNode node, List<ParseNode> c)
ParseNode	visitLeave(LikeParseNode node, List<ParseNode> c)
ParseNode	visitLeave(OrParseNode node, List<ParseNode> nodes)

Methods inherited from class org.apache.phoenix.parse.ParseNodeRewriter

addElement, enterParseNode, getResolver, isTopLevel, leaveCompoundNode, newElementList, reset, rewrite, rewrite, visit, visit, visit, visit, visit, visit, visit, visit, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave, visitLeave

Methods inherited from class org.apache.phoenix.parse.TraverseAllParseNodeVisitor

visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter, visitEnter

Methods inherited from class org.apache.phoenix.parse.BaseParseNodeVisitor

visit, visitEnter, visitLeave

Methods inherited from class java.lang.Object

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

Method Detail

removeFromWhereClause

public static SelectStatement removeFromWhereClause(SelectStatement statement,
                                    Set<ParseNode> removeNodes)
                                             throws SQLException

Rewrite the select statement by filtering out expression nodes from the WHERE clause

Parameters:

statement - the select statement from which to filter.

removeNodes - expression nodes to filter out of WHERE clause.

Returns:

new select statement

Throws:

SQLException

moveFromHavingToWhereClause

public static SelectStatement moveFromHavingToWhereClause(SelectStatement statement,
                                          Set<ParseNode> moveNodes)
                                                   throws SQLException

Rewrite the select statement by filtering out expression nodes from the HAVING clause and anding them with the WHERE clause.

Parameters:

statement - the select statement from which to move the nodes.

moveNodes - expression nodes to filter out of HAVING clause and add to WHERE clause.

Returns:

new select statement

Throws:

SQLException

visitEnter

public boolean visitEnter(AndParseNode node)
                   throws SQLException

Specified by:

visitEnter in interface ParseNodeVisitor<ParseNode>

Overrides:

visitEnter in class TraverseAllParseNodeVisitor<ParseNode>

Throws:

SQLException

visitLeave

public ParseNode visitLeave(AndParseNode node,
                   List<ParseNode> nodes)
                     throws SQLException

Specified by:

visitLeave in interface ParseNodeVisitor<ParseNode>

Overrides:

visitLeave in class ParseNodeRewriter

Throws:

SQLException

visitEnter

public boolean visitEnter(OrParseNode node)
                   throws SQLException

Specified by:

visitEnter in interface ParseNodeVisitor<ParseNode>

Overrides:

visitEnter in class TraverseAllParseNodeVisitor<ParseNode>

Throws:

SQLException

visitLeave

public ParseNode visitLeave(OrParseNode node,
                   List<ParseNode> nodes)
                     throws SQLException

Specified by:

visitLeave in interface ParseNodeVisitor<ParseNode>

Overrides:

visitLeave in class ParseNodeRewriter

Throws:

SQLException

visitEnter

public boolean visitEnter(ComparisonParseNode node)
                   throws SQLException

Specified by:

visitEnter in interface ParseNodeVisitor<ParseNode>

Overrides:

visitEnter in class TraverseAllParseNodeVisitor<ParseNode>

Throws:

SQLException

visitLeave

public ParseNode visitLeave(ComparisonParseNode node,
                   List<ParseNode> c)
                     throws SQLException

Specified by:

visitLeave in interface ParseNodeVisitor<ParseNode>

Overrides:

visitLeave in class ParseNodeRewriter

Throws:

SQLException

visitEnter

public boolean visitEnter(LikeParseNode node)
                   throws SQLException

Specified by:

visitEnter in interface ParseNodeVisitor<ParseNode>

Overrides:

visitEnter in class TraverseAllParseNodeVisitor<ParseNode>

Throws:

SQLException

visitLeave

public ParseNode visitLeave(LikeParseNode node,
                   List<ParseNode> c)
                     throws SQLException

Specified by:

visitLeave in interface ParseNodeVisitor<ParseNode>

Overrides:

visitLeave in class ParseNodeRewriter

Throws:

SQLException

visitEnter

public boolean visitEnter(InListParseNode node)
                   throws SQLException

Specified by:

visitEnter in interface ParseNodeVisitor<ParseNode>

Overrides:

visitEnter in class TraverseAllParseNodeVisitor<ParseNode>

Throws:

SQLException

visitLeave

public ParseNode visitLeave(InListParseNode node,
                   List<ParseNode> c)
                     throws SQLException

Specified by:

visitLeave in interface ParseNodeVisitor<ParseNode>

Overrides:

visitLeave in class ParseNodeRewriter

Throws:

SQLException

visitEnter

public boolean visitEnter(InParseNode node)
                   throws SQLException

Specified by:

visitEnter in interface ParseNodeVisitor<ParseNode>

Overrides:

visitEnter in class TraverseAllParseNodeVisitor<ParseNode>

Throws:

SQLException

visitLeave

public ParseNode visitLeave(InParseNode node,
                   List<ParseNode> c)
                     throws SQLException

Specified by:

visitLeave in interface ParseNodeVisitor<ParseNode>

Overrides:

visitLeave in class ParseNodeRewriter

Throws:

SQLException