Collaboration diagram for com.cloudera.impala.analysis.OrderByElement:

Public Member Functions
	OrderByElement (Expr expr, boolean isAsc, Boolean nullsFirstParam)

Expr	getExpr ()

void	setExpr (Expr e)

boolean	isAsc ()

Boolean	getNullsFirstParam ()

boolean	nullsFirst ()

String	toSql ()

boolean	equals (Object obj)

OrderByElement	clone ()

Static Public Member Functions
static boolean	nullsFirst (Boolean nullsFirstParam, boolean isAsc)

static List< OrderByElement >	substitute (List< OrderByElement > src, ExprSubstitutionMap smap, Analyzer analyzer)

static List< Expr >	getOrderByExprs (List< OrderByElement > src)

static List< OrderByElement >	reverse (List< OrderByElement > src)

Private Attributes
Expr	expr_

final boolean	isAsc_

final Boolean	nullsFirstParam_

Detailed Description

Combination of expr, ASC/DESC, and nulls ordering.

Definition at line 25 of file OrderByElement.java.

Constructor & Destructor Documentation

com.cloudera.impala.analysis.OrderByElement.OrderByElement	(	Expr	expr,
		boolean	isAsc,
		Boolean	nullsFirstParam
	)

inline

Constructs the OrderByElement.

'nullsFirstParam' should be true if "NULLS FIRST", false if "NULLS LAST", or null if the NULLs order was not specified.

Definition at line 38 of file OrderByElement.java.

References com.cloudera.impala.analysis.OrderByElement.isAsc().

Referenced by com.cloudera.impala.analysis.OrderByElement.clone(), com.cloudera.impala.analysis.OrderByElement.equals(), com.cloudera.impala.analysis.OrderByElement.reverse(), and com.cloudera.impala.analysis.OrderByElement.substitute().

Member Function Documentation

OrderByElement com.cloudera.impala.analysis.OrderByElement.clone ( )

inline

Definition at line 85 of file OrderByElement.java.

References com.cloudera.impala.analysis.Expr.clone(), com.cloudera.impala.analysis.OrderByElement.expr_, com.cloudera.impala.analysis.OrderByElement.isAsc_, com.cloudera.impala.analysis.OrderByElement.nullsFirstParam_, and com.cloudera.impala.analysis.OrderByElement.OrderByElement().

boolean com.cloudera.impala.analysis.OrderByElement.equals ( Object obj )

inline

Definition at line 72 of file OrderByElement.java.

References com.cloudera.impala.analysis.OrderByElement.isAsc_, com.cloudera.impala.analysis.OrderByElement.nullsFirstParam_, and com.cloudera.impala.analysis.OrderByElement.OrderByElement().

Expr com.cloudera.impala.analysis.OrderByElement.getExpr ( )

inline

Definition at line 45 of file OrderByElement.java.

References com.cloudera.impala.analysis.OrderByElement.expr_.

Referenced by com.cloudera.impala.planner.AnalyticPlanner.SortGroup.isPrefixOf(), and com.cloudera.impala.analysis.OrderByElement.reverse().

Boolean com.cloudera.impala.analysis.OrderByElement.getNullsFirstParam ( )

inline

Definition at line 48 of file OrderByElement.java.

References com.cloudera.impala.analysis.OrderByElement.nullsFirstParam_.

static List<Expr> com.cloudera.impala.analysis.OrderByElement.getOrderByExprs ( List< OrderByElement > src )

inlinestatic

Extracts the order-by exprs from the list of order-by elements and returns them.

Definition at line 123 of file OrderByElement.java.

Referenced by com.cloudera.impala.planner.AnalyticPlanner.createSortGroupPlan().

boolean com.cloudera.impala.analysis.OrderByElement.isAsc ( )

inline

Definition at line 47 of file OrderByElement.java.

References com.cloudera.impala.analysis.OrderByElement.isAsc_.

Referenced by com.cloudera.impala.planner.AnalyticPlanner.SortGroup.isPrefixOf(), and com.cloudera.impala.analysis.OrderByElement.OrderByElement().

boolean com.cloudera.impala.analysis.OrderByElement.nullsFirst ( )

inline

Definition at line 49 of file OrderByElement.java.

References com.cloudera.impala.analysis.OrderByElement.isAsc_, com.cloudera.impala.analysis.OrderByElement.nullsFirst(), and com.cloudera.impala.analysis.OrderByElement.nullsFirstParam_.

Referenced by com.cloudera.impala.planner.AnalyticPlanner.SortGroup.isPrefixOf(), com.cloudera.impala.analysis.OrderByElement.nullsFirst(), and com.cloudera.impala.analysis.OrderByElement.reverse().

static boolean com.cloudera.impala.analysis.OrderByElement.nullsFirst	(	Boolean	nullsFirstParam,
		boolean	isAsc
	)

inlinestatic

Compute nullsFirst.

Parameters

nullsFirstParam	True if "NULLS FIRST", false if "NULLS LAST", or null if the NULLs order was not specified.
isAsc

Returns: Returns true if nulls are ordered first or false if nulls are ordered last. Independent of isAsc.

Definition at line 102 of file OrderByElement.java.

static List<OrderByElement> com.cloudera.impala.analysis.OrderByElement.reverse ( List< OrderByElement > src )

inlinestatic

Returns a new list of OrderByElements with the same (cloned) expressions but the ordering direction reversed (asc becomes desc, nulls first becomes nulls last, etc.)

Definition at line 135 of file OrderByElement.java.

References com.cloudera.impala.analysis.OrderByElement.getExpr(), com.cloudera.impala.analysis.OrderByElement.isAsc_, com.cloudera.impala.analysis.OrderByElement.nullsFirst(), com.cloudera.impala.analysis.OrderByElement.nullsFirstParam_, and com.cloudera.impala.analysis.OrderByElement.OrderByElement().

void com.cloudera.impala.analysis.OrderByElement.setExpr ( Expr e )

inline

Definition at line 46 of file OrderByElement.java.

References com.cloudera.impala.analysis.OrderByElement.expr_.

static List<OrderByElement> com.cloudera.impala.analysis.OrderByElement.substitute	(	List< OrderByElement >	src,
		ExprSubstitutionMap	smap,
		Analyzer	analyzer
	)