org.apache.lens.driver.es.translator

Interface ASTVisitor

All Known Implementing Classes:

ESAggregateVisitor, ESTermVisitor, ESVisitor

public interface ASTVisitor

The visitor interface for ASTInorderTraversal It covers only simple queries (no joins or sub queries) Also it does not handle complicated expressions

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static class	ASTVisitor.OrderBy

Method Summary

Modifier and Type	Method and Description
void	completeVisit()
void	visitAggregation(String aggregationType, String columnName, String alias)
void	visitAllCols()
void	visitCriteria(ASTCriteriaVisitor visitedSubTree)
void	visitFrom(String database, String table)
void	visitGroupBy(String colName)
void	visitLimit(int limit)
void	visitOrderBy(String colName, ASTVisitor.OrderBy orderBy)
void	visitSimpleSelect(String columnName, String alias)

Method Detail

visitSimpleSelect

void visitSimpleSelect(String columnName,
                       String alias)

visitAggregation

void visitAggregation(String aggregationType,
                      String columnName,
                      String alias)
               throws InvalidQueryException

Throws:

InvalidQueryException

visitFrom

void visitFrom(String database,
               String table)

visitCriteria

void visitCriteria(ASTCriteriaVisitor visitedSubTree)

visitGroupBy

void visitGroupBy(String colName)

visitOrderBy

void visitOrderBy(String colName,
                  ASTVisitor.OrderBy orderBy)

visitLimit

void visitLimit(int limit)

completeVisit

void completeVisit()

visitAllCols

void visitAllCols()