RemoveEmptyDelete (presto-main 345 API)

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

All Implemented Interfaces:

Rule<TableFinishNode>
```
public class RemoveEmptyDelete
extends Object
implements Rule<TableFinishNode>
```
If the predicate for a delete is optimized to false, the target table scan of the delete will be replaced with an empty values node. This type of plan cannot be executed and is meaningless anyway, so we replace the entire thing with a values node.
Transforms
```
  - TableFinish
    - Exchange
      - Delete
        - empty Values
 
```
into
```
  - Values (0)
 
```

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

Constructor Summary

Constructors
Constructor Description

RemoveEmptyDelete()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`Rule.Result`	`apply(TableFinishNode node, Captures captures, Rule.Context context)`
`Pattern<TableFinishNode>`	`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
- RemoveEmptyDelete
```
public RemoveEmptyDelete()
```

Method Detail

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

Returns a pattern to which plan nodes this rule applies.

Specified by:

getPattern in interface Rule<TableFinishNode>

apply

public Rule.Result apply(TableFinishNode node,
                         Captures captures,
                         Rule.Context context)

Specified by:: apply in interface Rule<TableFinishNode>