Hi all,

I found the following new MAL function in the new release of version 11.23.3:

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pattern group.multicolumn(b:bat[:any]...) (ref:bat[:oid],grp:bat[:oid],hist:bat[:any])

address GROUPmulticolumngroup;

comment Derivation of a group index over multiple columns.

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I thought I may be used by queries with multiple attributes in the GROUP BY clause.

So I tried to EXPLAIN such a query (e.g., SELECT ... FROM... GROUP BY ColA, ColB), but it is still compiled with multiple group.subgroup() followed by a group.subgroupdone().

So, when would this function group.multicolumn() used?

Thanks,
Wenjian