public class SingleStringInputCachingExpressionColumnValueSelector extends BaseExpressionColumnValueSelector
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,
RowIdSupplier rowIdSupplier) |
| Modifier and Type | Method and Description |
|---|---|
protected ExprEval<?> |
eval()
Implementations override this.
|
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.
|
classOfObject, getDouble, getFloat, getLong, getObjectpublic SingleStringInputCachingExpressionColumnValueSelector(DimensionSelector selector, Expr expression, @Nullable RowIdSupplier rowIdSupplier)
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 HotLoopCalleeinspectRuntimeShape in class BaseExpressionColumnValueSelectorprotected ExprEval<?> eval()
BaseExpressionColumnValueSelectoreval in class BaseExpressionColumnValueSelectorpublic 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 BaseNullableColumnValueSelectorisNull in class BaseExpressionColumnValueSelectorCopyright © 2011–2023 The Apache Software Foundation. All rights reserved.