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  1. MariaDB Server
  2. MDEV-34041

Additional information for materialized subqueries must be displayed in EXPLAIN/ANALYZE FORMAT=JSON

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    Description

      There is not enough information in EXPLAIN/ANALYZE output about the strategy chosen to process a subquery. This task aims to augment the output for materialized subqueries. The example of desired output is as follows:

      "subqueries": [
      		 
            {
      		 
              "NULL-AWARE-MATERIALIZATION": {
      		 
       
      		 
                "r_algorithm": "full-scan-on-null",
      		 
                "r_lookups": 122234,
      		 
                "r_full_scans": 4
      		 
       
      		 
                "query_block": {
      		 
                  "select_id": 2,

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. MDEV-34301 ANALYZE FORMAT=JSON doesn't show expression cache for IN subqueries

          • Major - Major loss of function.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. MDEV-34665 Simplify IN predicate processing for NULL-aware materialization involving only one column

          • Major - Major loss of function.
          • Closed

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              oleg.smirnov Oleg Smirnov
              oleg.smirnov Oleg Smirnov
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                Resolved:

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