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Original file line number Diff line number Diff line change
Expand Up @@ -17,8 +17,8 @@
import java.util.StringJoiner;

/**
* Any SQL expression with parentheses, like {@code MAX()}, or {@code ABS()}. A
* function is always a {@code NamedExpression}.
* Any ESQL function; generally this is translated into a computation to be evaluated on arguments, including scalar functions (e.g. in
* {@code EVAL}) or aggregation functions ({@code STATS}).
*/
public abstract class Function extends Expression {

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