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  1. MariaDB Server
  2. MDEV-18527

Optimizer trace for DELETE query shows table:null

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Details

    • Bug
    • Status: Closed (View Workflow)
    • Major
    • Resolution: Fixed
    • 10.4
    • 10.4.3
    • Optimizer
    • None

    Description

      create table ten(a int);
      insert into ten values (0),(1),(2),(3),(4),(5),(6),(7),(8),(9);
      create table t10 (a int, b int);
      insert into t10 select a,a from ten;
      alter table t10 add key(a);
       
      set optimizer_trace=1;
      explain delete from t10 where t10.a<3;
      select * from information_schema.optimizer_trace\G 
      

      prints

      *************************** 1. row ***************************
                                  QUERY: explain delete from t10 where t10.a<3
                                  TRACE: {
        "steps": [
          {
            "table": null,
            "range_analysis": {
              "table_scan": {
                "rows": 10,
                "cost": 5.1
              },
              "potential_range_indexes": [
      
      

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              varun Varun Gupta (Inactive)
              psergei Sergei Petrunia
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              Dates

                Created:
                Updated:
                Resolved:

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