{
  "steps": [
    {
      "join_preparation": {
        "select#": 1,
        "steps": [
          {
            "expanded_query": "/* select#1 */ select sql_no_cache `e`.`id` AS `id`,`g`.`id` AS `id`,`c`.`id` AS `id` from ((`entry` `e` join `entry_group` `g` on((`g`.`id` = `e`.`group_id`))) join `category` `c` on((`c`.`id` = `g`.`category_id`))) where (`e`.`uneven_val` between 300 and 8000)"
          }
        ] /* steps */
      } /* join_preparation */
    },
    {
      "join_optimization": {
        "select#": 1,
        "steps": [
          {
            "transformations_to_nested_joins": {
              "transformations": [
                "JOIN_condition_to_WHERE",
                "parenthesis_removal"
              ] /* transformations */,
              "expanded_query": "/* select#1 */ select sql_no_cache `e`.`id` AS `id`,`g`.`id` AS `id`,`c`.`id` AS `id` from `entry` `e` join `entry_group` `g` join `category` `c` where ((`e`.`uneven_val` between 300 and 8000) and (`c`.`id` = `g`.`category_id`) and (`g`.`id` = `e`.`group_id`))"
            } /* transformations_to_nested_joins */
          },
          {
            "condition_processing": {
              "condition": "WHERE",
              "original_condition": "((`e`.`uneven_val` between 300 and 8000) and (`c`.`id` = `g`.`category_id`) and (`g`.`id` = `e`.`group_id`))",
              "steps": [
                {
                  "transformation": "equality_propagation",
                  "resulting_condition": "((`e`.`uneven_val` between 300 and 8000) and multiple equal(`c`.`id`, `g`.`category_id`) and multiple equal(`g`.`id`, `e`.`group_id`))"
                },
                {
                  "transformation": "constant_propagation",
                  "resulting_condition": "((`e`.`uneven_val` between 300 and 8000) and multiple equal(`c`.`id`, `g`.`category_id`) and multiple equal(`g`.`id`, `e`.`group_id`))"
                },
                {
                  "transformation": "trivial_condition_removal",
                  "resulting_condition": "((`e`.`uneven_val` between 300 and 8000) and multiple equal(`c`.`id`, `g`.`category_id`) and multiple equal(`g`.`id`, `e`.`group_id`))"
                }
              ] /* steps */
            } /* condition_processing */
          },
          {
            "table_dependencies": [
              {
                "table": "`entry` `e`",
                "row_may_be_null": false,
                "map_bit": 0,
                "depends_on_map_bits": [
                ] /* depends_on_map_bits */
              },
              {
                "table": "`entry_group` `g`",
                "row_may_be_null": false,
                "map_bit": 1,
                "depends_on_map_bits": [
                ] /* depends_on_map_bits */
              },
              {
                "table": "`category` `c`",
                "row_may_be_null": false,
                "map_bit": 2,
                "depends_on_map_bits": [
                ] /* depends_on_map_bits */
              }
            ] /* table_dependencies */
          },
          {
            "ref_optimizer_key_uses": [
              {
                "table": "`entry` `e`",
                "field": "group_id",
                "equals": "`g`.`id`",
                "null_rejecting": false
              },
              {
                "table": "`entry_group` `g`",
                "field": "id",
                "equals": "`e`.`group_id`",
                "null_rejecting": false
              },
              {
                "table": "`entry_group` `g`",
                "field": "category_id",
                "equals": "`c`.`id`",
                "null_rejecting": false
              },
              {
                "table": "`entry_group` `g`",
                "field": "id",
                "equals": "`e`.`group_id`",
                "null_rejecting": false
              },
              {
                "table": "`category` `c`",
                "field": "id",
                "equals": "`g`.`category_id`",
                "null_rejecting": false
              }
            ] /* ref_optimizer_key_uses */
          },
          {
            "rows_estimation": [
              {
                "table": "`entry` `e`",
                "range_analysis": {
                  "table_scan": {
                    "rows": 249996,
                    "cost": 50546
                  } /* table_scan */,
                  "potential_range_indices": [
                    {
                      "index": "PRIMARY",
                      "usable": false,
                      "cause": "not_applicable"
                    },
                    {
                      "index": "idx_jac_entry_on_group_id",
                      "usable": false,
                      "cause": "not_applicable"
                    },
                    {
                      "index": "idx_jac_entry_on_uneven_val",
                      "usable": true,
                      "key_parts": [
                        "uneven_val",
                        "id"
                      ] /* key_parts */
                    }
                  ] /* potential_range_indices */,
                  "setup_range_conditions": [
                  ] /* setup_range_conditions */,
                  "group_index_range": {
                    "chosen": false,
                    "cause": "not_single_table"
                  } /* group_index_range */,
                  "analyzing_range_alternatives": {
                    "range_scan_alternatives": [
                      {
                        "index": "idx_jac_entry_on_uneven_val",
                        "ranges": [
                          "300 <= uneven_val <= 8000"
                        ] /* ranges */,
                        "index_dives_for_eq_ranges": true,
                        "rowid_ordered": false,
                        "using_mrr": false,
                        "index_only": false,
                        "rows": 23306,
                        "cost": 27968,
                        "chosen": true
                      }
                    ] /* range_scan_alternatives */,
                    "analyzing_roworder_intersect": {
                      "usable": false,
                      "cause": "too_few_roworder_scans"
                    } /* analyzing_roworder_intersect */
                  } /* analyzing_range_alternatives */,
                  "chosen_range_access_summary": {
                    "range_access_plan": {
                      "type": "range_scan",
                      "index": "idx_jac_entry_on_uneven_val",
                      "rows": 23306,
                      "ranges": [
                        "300 <= uneven_val <= 8000"
                      ] /* ranges */
                    } /* range_access_plan */,
                    "rows_for_plan": 23306,
                    "cost_for_plan": 27968,
                    "chosen": true
                  } /* chosen_range_access_summary */
                } /* range_analysis */
              },
              {
                "table": "`entry_group` `g`",
                "table_scan": {
                  "rows": 24943,
                  "cost": 97
                } /* table_scan */
              },
              {
                "table": "`category` `c`",
                "table_scan": {
                  "rows": 7,
                  "cost": 1
                } /* table_scan */
              }
            ] /* rows_estimation */
          },
          {
            "considered_execution_plans": [
              {
                "plan_prefix": [
                ] /* plan_prefix */,
                "table": "`category` `c`",
                "best_access_path": {
                  "considered_access_paths": [
                    {
                      "access_type": "ref",
                      "index": "PRIMARY",
                      "usable": false,
                      "chosen": false
                    },
                    {
                      "access_type": "scan",
                      "rows": 7,
                      "cost": 2.4,
                      "chosen": true
                    }
                  ] /* considered_access_paths */
                } /* best_access_path */,
                "cost_for_plan": 2.4,
                "rows_for_plan": 7,
                "rest_of_plan": [
                  {
                    "plan_prefix": [
                      "`category` `c`"
                    ] /* plan_prefix */,
                    "table": "`entry` `e`",
                    "best_access_path": {
                      "considered_access_paths": [
                        {
                          "access_type": "ref",
                          "index": "idx_jac_entry_on_group_id",
                          "usable": false,
                          "chosen": false
                        },
                        {
                          "access_type": "range",
                          "rows": 23306,
                          "cost": 228406,
                          "chosen": true
                        }
                      ] /* considered_access_paths */
                    } /* best_access_path */,
                    "cost_for_plan": 228408,
                    "rows_for_plan": 163142,
                    "rest_of_plan": [
                      {
                        "plan_prefix": [
                          "`category` `c`",
                          "`entry` `e`"
                        ] /* plan_prefix */,
                        "table": "`entry_group` `g`",
                        "best_access_path": {
                          "considered_access_paths": [
                            {
                              "access_type": "ref",
                              "index": "PRIMARY",
                              "rows": 1,
                              "cost": 23306,
                              "chosen": true
                            },
                            {
                              "access_type": "ref",
                              "index": "idx_jac_entry_group_on_category_id",
                              "rows": 1,
                              "cost": 163142,
                              "chosen": false
                            },
                            {
                              "access_type": "scan",
                              "cause": "covering_index_better_than_full_scan",
                              "chosen": false
                            }
                          ] /* considered_access_paths */
                        } /* best_access_path */,
                        "cost_for_plan": 284343,
                        "rows_for_plan": 163142,
                        "chosen": true
                      }
                    ] /* rest_of_plan */
                  },
                  {
                    "plan_prefix": [
                      "`category` `c`"
                    ] /* plan_prefix */,
                    "table": "`entry_group` `g`",
                    "best_access_path": {
                      "considered_access_paths": [
                        {
                          "access_type": "ref",
                          "index": "PRIMARY",
                          "usable": false,
                          "chosen": false
                        },
                        {
                          "access_type": "ref",
                          "index": "idx_jac_entry_group_on_category_id",
                          "rows": 1781,
                          "cost": 372.32,
                          "chosen": true
                        },
                        {
                          "access_type": "scan",
                          "cost": 5085.6,
                          "rows": 24943,
                          "cause": "cost",
                          "chosen": false
                        }
                      ] /* considered_access_paths */
                    } /* best_access_path */,
                    "cost_for_plan": 2511.9,
                    "rows_for_plan": 12467,
                    "rest_of_plan": [
                      {
                        "plan_prefix": [
                          "`category` `c`",
                          "`entry_group` `g`"
                        ] /* plan_prefix */,
                        "table": "`entry` `e`",
                        "best_access_path": {
                          "considered_access_paths": [
                            {
                              "access_type": "ref",
                              "index": "idx_jac_entry_on_group_id",
                              "rows": 4,
                              "cost": 49869,
                              "chosen": true
                            },
                            {
                              "access_type": "range",
                              "rows": 17480,
                              "cost": 4.07e8,
                              "chosen": false
                            }
                          ] /* considered_access_paths */
                        } /* best_access_path */,
                        "cost_for_plan": 62354,
                        "rows_for_plan": 49868,
                        "chosen": true
                      }
                    ] /* rest_of_plan */
                  }
                ] /* rest_of_plan */
              },
              {
                "plan_prefix": [
                ] /* plan_prefix */,
                "table": "`entry` `e`",
                "best_access_path": {
                  "considered_access_paths": [
                    {
                      "access_type": "ref",
                      "index": "idx_jac_entry_on_group_id",
                      "usable": false,
                      "chosen": false
                    },
                    {
                      "access_type": "range",
                      "rows": 23306,
                      "cost": 32629,
                      "chosen": true
                    }
                  ] /* considered_access_paths */
                } /* best_access_path */,
                "cost_for_plan": 32629,
                "rows_for_plan": 23306,
                "rest_of_plan": [
                  {
                    "plan_prefix": [
                      "`entry` `e`"
                    ] /* plan_prefix */,
                    "table": "`category` `c`",
                    "best_access_path": {
                      "considered_access_paths": [
                        {
                          "access_type": "ref",
                          "index": "PRIMARY",
                          "usable": false,
                          "chosen": false
                        },
                        {
                          "access_type": "scan",
                          "using_join_cache": true,
                          "rows": 7,
                          "cost": 32630,
                          "chosen": true
                        }
                      ] /* considered_access_paths */
                    } /* best_access_path */,
                    "cost_for_plan": 65260,
                    "rows_for_plan": 163142,
                    "pruned_by_cost": true
                  },
                  {
                    "plan_prefix": [
                      "`entry` `e`"
                    ] /* plan_prefix */,
                    "table": "`entry_group` `g`",
                    "best_access_path": {
                      "considered_access_paths": [
                        {
                          "access_type": "ref",
                          "index": "PRIMARY",
                          "rows": 1,
                          "cost": 23306,
                          "chosen": true
                        },
                        {
                          "access_type": "ref",
                          "index": "idx_jac_entry_group_on_category_id",
                          "rows": 1,
                          "cost": 23306,
                          "chosen": false
                        },
                        {
                          "access_type": "scan",
                          "cause": "covering_index_better_than_full_scan",
                          "chosen": false
                        }
                      ] /* considered_access_paths */
                    } /* best_access_path */,
                    "cost_for_plan": 60597,
                    "rows_for_plan": 23306,
                    "rest_of_plan": [
                      {
                        "plan_prefix": [
                          "`entry` `e`",
                          "`entry_group` `g`"
                        ] /* plan_prefix */,
                        "table": "`category` `c`",
                        "best_access_path": {
                          "considered_access_paths": [
                            {
                              "access_type": "ref",
                              "index": "PRIMARY",
                              "rows": 1,
                              "cost": 23306,
                              "chosen": true
                            },
                            {
                              "access_type": "scan",
                              "cause": "covering_index_better_than_full_scan",
                              "chosen": false
                            }
                          ] /* considered_access_paths */
                        } /* best_access_path */,
                        "added_to_eq_ref_extension": true,
                        "cost_for_plan": 88564,
                        "rows_for_plan": 23306,
                        "pruned_by_cost": true
                      },
                      {
                        "plan_prefix": [
                          "`entry` `e`",
                          "`entry_group` `g`"
                        ] /* plan_prefix */,
                        "table": "`category` `c`",
                        "best_access_path": {
                          "considered_access_paths": [
                            {
                              "access_type": "ref",
                              "index": "PRIMARY",
                              "rows": 1,
                              "cost": 23306,
                              "chosen": true
                            },
                            {
                              "access_type": "scan",
                              "cause": "covering_index_better_than_full_scan",
                              "chosen": false
                            }
                          ] /* considered_access_paths */
                        } /* best_access_path */,
                        "cost_for_plan": 88564,
                        "rows_for_plan": 23306,
                        "pruned_by_cost": true
                      }
                    ] /* rest_of_plan */
                  }
                ] /* rest_of_plan */
              },
              {
                "plan_prefix": [
                ] /* plan_prefix */,
                "table": "`entry_group` `g`",
                "best_access_path": {
                  "considered_access_paths": [
                    {
                      "access_type": "ref",
                      "index": "PRIMARY",
                      "usable": false,
                      "chosen": false
                    },
                    {
                      "access_type": "ref",
                      "index": "idx_jac_entry_group_on_category_id",
                      "usable": false,
                      "chosen": false
                    },
                    {
                      "access_type": "scan",
                      "rows": 24943,
                      "cost": 5085.6,
                      "chosen": true
                    }
                  ] /* considered_access_paths */
                } /* best_access_path */,
                "cost_for_plan": 5085.6,
                "rows_for_plan": 24943,
                "rest_of_plan": [
                  {
                    "plan_prefix": [
                      "`entry_group` `g`"
                    ] /* plan_prefix */,
                    "table": "`category` `c`",
                    "best_access_path": {
                      "considered_access_paths": [
                        {
                          "access_type": "ref",
                          "index": "PRIMARY",
                          "rows": 1,
                          "cost": 24943,
                          "chosen": true
                        },
                        {
                          "access_type": "scan",
                          "cause": "covering_index_better_than_full_scan",
                          "chosen": false
                        }
                      ] /* considered_access_paths */
                    } /* best_access_path */,
                    "cost_for_plan": 35017,
                    "rows_for_plan": 24943,
                    "rest_of_plan": [
                      {
                        "plan_prefix": [
                          "`entry_group` `g`",
                          "`category` `c`"
                        ] /* plan_prefix */,
                        "table": "`entry` `e`",
                        "best_access_path": {
                          "considered_access_paths": [
                            {
                              "access_type": "ref",
                              "index": "idx_jac_entry_on_group_id",
                              "rows": 4,
                              "cost": 99773,
                              "chosen": true
                            },
                            {
                              "access_type": "range",
                              "rows": 17480,
                              "cost": 8.14e8,
                              "chosen": false
                            }
                          ] /* considered_access_paths */
                        } /* best_access_path */,
                        "added_to_eq_ref_extension": false
                      },
                      {
                        "plan_prefix": [
                          "`entry_group` `g`",
                          "`category` `c`"
                        ] /* plan_prefix */,
                        "table": "`entry` `e`",
                        "best_access_path": {
                          "considered_access_paths": [
                            {
                              "access_type": "ref",
                              "index": "idx_jac_entry_on_group_id",
                              "rows": 4,
                              "cost": 99773,
                              "chosen": true
                            },
                            {
                              "access_type": "range",
                              "rows": 17480,
                              "cost": 8.14e8,
                              "chosen": false
                            }
                          ] /* considered_access_paths */
                        } /* best_access_path */,
                        "cost_for_plan": 154744,
                        "rows_for_plan": 99772,
                        "pruned_by_cost": true
                      }
                    ] /* rest_of_plan */
                  },
                  {
                    "plan_prefix": [
                      "`entry_group` `g`"
                    ] /* plan_prefix */,
                    "table": "`entry` `e`",
                    "best_access_path": {
                      "considered_access_paths": [
                        {
                          "access_type": "ref",
                          "index": "idx_jac_entry_on_group_id",
                          "rows": 4,
                          "cost": 99773,
                          "chosen": true
                        },
                        {
                          "access_type": "range",
                          "rows": 17480,
                          "cost": 8.14e8,
                          "chosen": false
                        }
                      ] /* considered_access_paths */
                    } /* best_access_path */,
                    "cost_for_plan": 124812,
                    "rows_for_plan": 99772,
                    "pruned_by_cost": true
                  }
                ] /* rest_of_plan */
              }
            ] /* considered_execution_plans */
          },
          {
            "attaching_conditions_to_tables": {
              "original_condition": "((`e`.`group_id` = `g`.`id`) and (`g`.`category_id` = `c`.`id`) and (`e`.`uneven_val` between 300 and 8000))",
              "attached_conditions_computation": [
              ] /* attached_conditions_computation */,
              "attached_conditions_summary": [
                {
                  "table": "`category` `c`",
                  "attached": null
                },
                {
                  "table": "`entry_group` `g`",
                  "attached": null
                },
                {
                  "table": "`entry` `e`",
                  "attached": "(`e`.`uneven_val` between 300 and 8000)"
                }
              ] /* attached_conditions_summary */
            } /* attaching_conditions_to_tables */
          },
          {
            "refine_plan": [
              {
                "table": "`category` `c`",
                "access_type": "index_scan"
              },
              {
                "table": "`entry_group` `g`"
              },
              {
                "table": "`entry` `e`"
              }
            ] /* refine_plan */
          }
        ] /* steps */
      } /* join_optimization */
    },
    {
      "join_execution": {
        "select#": 1,
        "steps": [
        ] /* steps */
      } /* join_execution */
    }
  ] /* steps */
}