ImplementOffset (presto-main 345 API)

java.lang.Object
- io.prestosql.sql.planner.iterative.rule.ImplementOffset

All Implemented Interfaces:

Rule<OffsetNode>
```
public class ImplementOffset
extends Object
implements Rule<OffsetNode>
```
Transforms:
```
 - Offset (row count = x)
    - Source
 
```
Into:
```
 - Project (prune rowNumber symbol)
    - Filter (rowNumber > x)
       - RowNumber
          - Source
 
```
Relies on RowNumberNode's property of keeping order of its input. If the query contains an ORDER BY clause, the sorted order will be respected when leading rows are removed.

Nested Class Summary
- Nested classes/interfaces inherited from interface io.prestosql.sql.planner.iterative.Rule
  Rule.Context, Rule.Result

Constructor Summary

Constructors
Constructor Description

ImplementOffset()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Rule.Result`	`apply(OffsetNode parent, Captures captures, Rule.Context context)`
`Pattern<OffsetNode>`	`getPattern()`	Returns a pattern to which plan nodes this rule applies.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface io.prestosql.sql.planner.iterative.Rule
isEnabled

Constructor Detail
- ImplementOffset
```
public ImplementOffset()
```

Method Detail

getPattern
```
public Pattern<OffsetNode> getPattern()
```
Description copied from interface: Rule

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<OffsetNode>

apply

public Rule.Result apply(OffsetNode parent,
                         Captures captures,
                         Rule.Context context)

Specified by:: apply in interface Rule<OffsetNode>