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  1. Core Server
  2. SERVER-17580

Warn when using only one of $min or $max index bounds

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      Description

      In the absence of a fix for SERVER-15168 (now tracked as SERVER-8045), it would be useful to output a warning when a query is issued which uses $min but not $max, or vice-versa. This is because such usage can often have deleterious performance, and is contrary to the intended usage of $min/$max (see DOCS-4015).

      Since the main in-server usage of $min/$max is for sharding, and always specifies both $min and $max, the warning would only occur with user queries that only specify either $min or $max (but not both).

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          is related to

          Bug - A problem which impairs or prevents the functions of the product. SERVER-40873 Poor performance on certain configurations of hint/limit/min/max

          • Major - P3 - Major loss of function.
          • Closed
          related to

          Improvement - An improvement or enhancement to an existing feature or task. DOCS-4015 Document performance impacts of $min without $max (and vice-versa)

          • Major - P3 - Major loss of function.
          • Closed

          Improvement - An improvement or enhancement to an existing feature or task. SERVER-15168 Allow intersection of $min/$max bounds with computed query indexBounds

          • Major - P3 - Major loss of function.
          • Closed

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                  Updated: