org.apache.phoenix.compile

Class ProjectionCompiler

java.lang.Object

org.apache.phoenix.compile.ProjectionCompiler

public class ProjectionCompiler
extends Object

Class that iterates through expressions in SELECT clause and adds projected columns to scan.

Since:

0.1

Method Summary

Modifier and Type	Method and Description
static RowProjector	compile(StatementContext context, SelectStatement statement, GroupByCompiler.GroupBy groupBy)
static RowProjector	compile(StatementContext context, SelectStatement statement, GroupByCompiler.GroupBy groupBy, List<? extends PDatum> targetColumns, Expression where) Builds the projection for the scan

Methods inherited from class java.lang.Object

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

Method Detail

compile

public static RowProjector compile(StatementContext context,
                                   SelectStatement statement,
                                   GroupByCompiler.GroupBy groupBy)
                            throws SQLException

Throws:

SQLException

compile

public static RowProjector compile(StatementContext context,
                                   SelectStatement statement,
                                   GroupByCompiler.GroupBy groupBy,
                                   List<? extends PDatum> targetColumns,
                                   Expression where)
                            throws SQLException

Builds the projection for the scan

Parameters:

context - query context kept between compilation of different query clauses

statement - TODO

groupBy - compiled GROUP BY clause

targetColumns - list of columns, parallel to aliasedNodes, that are being set for an UPSERT SELECT statement. Used to coerce expression types to the expected target type.

Returns:

projector used to access row values during scan

Throws:

SQLException