Package org.elasticsearch.xpack.esql.expression.function

Interface OptionalArgument

All Known Implementing Classes:

AvgOverTime, Categorize, Chunk, Coalesce, Contains, CountDistinct, CountDistinctOverTime, DateFormat, Decay, Delta, FirstOverTime, Greatest, Idelta, Increase, IpPrefix, Irate, Knn, Kql, LastOverTime, Least, Locate, Log, Match, MatchOperator, MatchPhrase, MultiMatch, MvSlice, MvSort, MvZip, QueryString, Rate, Repeat, Round, SpatialGridFunction, StGeohash, StGeohex, StGeotile, Substring, ToIp, TRange

public interface OptionalArgument

Marker interface indicating that a function accepts one optional argument (typically the last one). This is used by the EsqlFunctionRegistry to perform validation of function declaration.