Class NeverHavingSpec
- java.lang.Object
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- org.apache.druid.query.groupby.having.NeverHavingSpec
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- All Implemented Interfaces:
Cacheable
,HavingSpec
public class NeverHavingSpec extends Object implements HavingSpec
A "having" spec that always evaluates to false
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Constructor Summary
Constructors Constructor Description NeverHavingSpec()
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
eval(ResultRow row)
Evaluates if a given row satisfies the having spec.byte[]
getCacheKey()
Get a byte array used as a cache key.void
setQuery(GroupByQuery query)
Informs this HavingSpec that rows passed to "eval" will originate from a particular groupBy query.
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Method Detail
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setQuery
public void setQuery(GroupByQuery query)
Description copied from interface:HavingSpec
Informs this HavingSpec that rows passed to "eval" will originate from a particular groupBy query.- Specified by:
setQuery
in interfaceHavingSpec
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eval
public boolean eval(ResultRow row)
Description copied from interface:HavingSpec
Evaluates if a given row satisfies the having spec.- Specified by:
eval
in interfaceHavingSpec
- Parameters:
row
- A Row of data that may contain aggregated values- Returns:
- true if the given row satisfies the having spec. False otherwise.
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getCacheKey
public byte[] getCacheKey()
Description copied from interface:Cacheable
Get a byte array used as a cache key.- Specified by:
getCacheKey
in interfaceCacheable
- Returns:
- a cache key
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