Marios Trivyzas c72a7998f5
SQL: Don't allow inexact fields for MIN/MAX (#39563)
MIN/MAX on strings are supported and are implemented with
TopAggs FIRST/LAST respectively, but they cannot operate on
`text` fields without underlying `keyword` fields => inexact.

Follows: #39427
2019-03-04 15:35:11 +01:00
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