ES|QL multivalue functions

ES|QL supports these multivalue functions:

• MV_APPEND
• MV_AVG
• MV_CONCAT
• MV_CONTAINS
• MV_COUNT
• MV_DEDUPE
• MV_FIRST
• MV_INTERSECTION
• MV_INTERSECTS
• MV_LAST
• MV_MAX
• MV_MEDIAN
• MV_MEDIAN_ABSOLUTE_DEVIATION
• MV_MIN
• MV_PERCENTILE
• MV_PSERIES_WEIGHTED_SUM
• MV_SORT
• MV_SLICE
• MV_SUM
• MV_UNION
• MV_ZIP