public class SingleStringInputCachingExpressionColumnValueSelector extends Object implements ColumnValueSelector<ExprEval>
ExpressionColumnValueSelector, but caches results for the first CACHE_SIZE dictionary IDs of
a string column. Must only be used on selectors with dictionaries.| Modifier and Type | Class and Description |
|---|---|
static class |
SingleStringInputCachingExpressionColumnValueSelector.LruEvalCache |
EMPTY_ARRAY| Constructor and Description |
|---|
SingleStringInputCachingExpressionColumnValueSelector(DimensionSelector selector,
Expr expression) |
| Modifier and Type | Method and Description |
|---|---|
Class<ExprEval> |
classOfObject() |
double |
getDouble() |
float |
getFloat() |
long |
getLong() |
ExprEval |
getObject() |
void |
inspectRuntimeShape(RuntimeShapeInspector inspector)
Implementations of this method should call
inspector.visit() with all fields of this class, which meet two
conditions:
1. |
boolean |
isNull()
Returns true if the primitive long, double, or float value returned by this selector should be treated as null.
|
public SingleStringInputCachingExpressionColumnValueSelector(DimensionSelector selector, Expr expression)
public void inspectRuntimeShape(RuntimeShapeInspector inspector)
HotLoopCalleeinspector.visit() with all fields of this class, which meet two
conditions:
1. They are used in methods of this class, annotated with CalledFromHotLoop
2. They are either:
a. Nullable objects
b. Instances of HotLoopCallee
c. Objects, which don't always have a specific class in runtime. For example, a field of type Set could be HashSet or TreeSet in runtime, depending on how
this instance (the instance on which inspectRuntimeShape() is called) is configured.
d. ByteBuffer or similar objects, where byte order matters
e. boolean flags, affecting branch taking
f. Arrays of objects, meeting any of conditions a-e.inspectRuntimeShape in interface HotLoopCalleepublic double getDouble()
getDouble in interface BaseDoubleColumnValueSelectorpublic float getFloat()
getFloat in interface BaseFloatColumnValueSelectorpublic long getLong()
getLong in interface BaseLongColumnValueSelector@Nullable public ExprEval getObject()
getObject in interface BaseObjectColumnValueSelector<ExprEval>public Class<ExprEval> classOfObject()
classOfObject in interface BaseObjectColumnValueSelector<ExprEval>public boolean isNull()
BaseNullableColumnValueSelectorBaseLongColumnValueSelector.getLong(), BaseDoubleColumnValueSelector.getDouble()
and BaseFloatColumnValueSelector.getFloat() must check this method first, or else they may improperly
use placeholder values returned by the primitive get methods.
Users of BaseObjectColumnValueSelector.getObject() should not call this method. Instead, call "getObject"
and check if it is null.isNull in interface BaseNullableColumnValueSelectorCopyright © 2011–2021 The Apache Software Foundation. All rights reserved.