{
  "steps": [
    {
      "join_preparation": {
        "select#": 1,
        "steps": [
          {
            "expanded_query": "/* select#1 */ select `LOG`.`IDLOG` AS `IDLOG`,`LOG`.`ID` AS `ID`,`LOG`.`IDADMIN` AS `IDADMIN`,`LOG`.`FECHA` AS `FECHA`,`LOG`.`CODE` AS `CODE`,`LOG`.`VALOR` AS `VALOR`,`LOG`.`EXTRA` AS `EXTRA`,`LOG`.`METODO` AS `METODO`,`LOG`.`TIME` AS `TIME` from `LOG` where (`LOG`.`IDADMIN` <> 99999) order by `LOG`.`FECHA` desc limit 0,10"
          }
        ]
      }
    },
    {
      "join_optimization": {
        "select#": 1,
        "steps": [
          {
            "condition_processing": {
              "condition": "WHERE",
              "original_condition": "(`LOG`.`IDADMIN` <> 99999)",
              "steps": [
                {
                  "transformation": "equality_propagation",
                  "resulting_condition": "(`LOG`.`IDADMIN` <> 99999)"
                },
                {
                  "transformation": "constant_propagation",
                  "resulting_condition": "(`LOG`.`IDADMIN` <> 99999)"
                },
                {
                  "transformation": "trivial_condition_removal",
                  "resulting_condition": "(`LOG`.`IDADMIN` <> 99999)"
                }
              ]
            }
          },
          {
            "substitute_generated_columns": {
            }
          },
          {
            "table_dependencies": [
              {
                "table": "`LOG`",
                "row_may_be_null": false,
                "map_bit": 0,
                "depends_on_map_bits": [
                ]
              }
            ]
          },
          {
            "ref_optimizer_key_uses": [
            ]
          },
          {
            "rows_estimation": [
              {
                "table": "`LOG`",
                "range_analysis": {
                  "table_scan": {
                    "rows": 1087991,
                    "cost": 119403
                  },
                  "potential_range_indexes": [
                    {
                      "index": "PRIMARY",
                      "usable": true,
                      "key_parts": [
                        "IDLOG",
                        "ID",
                        "IDADMIN"
                      ]
                    },
                    {
                      "index": "IDLOG",
                      "usable": false,
                      "cause": "not_applicable"
                    }
                  ],
                  "setup_range_conditions": [
                  ],
                  "group_index_range": {
                    "chosen": false,
                    "cause": "not_group_by_or_distinct"
                  },
                  "skip_scan_range": {
                    "potential_skip_scan_indexes": [
                      {
                        "index": "PRIMARY",
                        "usable": false,
                        "cause": "query_references_nonkey_column"
                      }
                    ]
                  },
                  "analyzing_range_alternatives": {
                    "range_scan_alternatives": [
                      {
                        "index": "PRIMARY",
                        "chosen": false,
                        "cause": "no_valid_range_for_this_index"
                      }
                    ],
                    "analyzing_roworder_intersect": {
                      "usable": false,
                      "cause": "too_few_roworder_scans"
                    }
                  }
                }
              }
            ]
          },
          {
            "considered_execution_plans": [
              {
                "plan_prefix": [
                ],
                "table": "`LOG`",
                "best_access_path": {
                  "considered_access_paths": [
                    {
                      "rows_to_scan": 1087991,
                      "filtering_effect": [
                      ],
                      "final_filtering_effect": 0.9,
                      "access_type": "scan",
                      "resulting_rows": 979192,
                      "cost": 119401,
                      "chosen": true
                    }
                  ]
                },
                "condition_filtering_pct": 100,
                "rows_for_plan": 979192,
                "cost_for_plan": 119401,
                "chosen": true
              }
            ]
          },
          {
            "attaching_conditions_to_tables": {
              "original_condition": "(`LOG`.`IDADMIN` <> 99999)",
              "attached_conditions_computation": [
              ],
              "attached_conditions_summary": [
                {
                  "table": "`LOG`",
                  "attached": "(`LOG`.`IDADMIN` <> 99999)"
                }
              ]
            }
          },
          {
            "optimizing_distinct_group_by_order_by": {
              "simplifying_order_by": {
                "original_clause": "`LOG`.`FECHA` desc",
                "items": [
                  {
                    "item": "`LOG`.`FECHA`"
                  }
                ],
                "resulting_clause_is_simple": true,
                "resulting_clause": "`LOG`.`FECHA` desc"
              }
            }
          },
          {
            "finalizing_table_conditions": [
              {
                "table": "`LOG`",
                "original_table_condition": "(`LOG`.`IDADMIN` <> 99999)",
                "final_table_condition   ": "(`LOG`.`IDADMIN` <> 99999)"
              }
            ]
          },
          {
            "refine_plan": [
              {
                "table": "`LOG`"
              }
            ]
          },
          {
            "considering_tmp_tables": [
              {
                "adding_sort_to_table": "LOG"
              }
            ]
          }
        ]
      }
    },
    {
      "join_execution": {
        "select#": 1,
        "steps": [
          {
            "sorting_table": "LOG",
            "filesort_information": [
              {
                "direction": "desc",
                "expression": "`LOG`.`FECHA`"
              }
            ],
            "filesort_priority_queue_optimization": {
              "limit": 10,
              "chosen": true
            },
            "filesort_execution": [
            ],
            "filesort_summary": {
              "memory_available": 2097152,
              "key_size": 14,
              "row_size": 14,
              "max_rows_per_buffer": 11,
              "num_rows_estimate": 1087991,
              "num_rows_found": 1087991,
              "num_initial_chunks_spilled_to_disk": 0,
              "peak_memory_used": 242,
              "sort_algorithm": "std::sort",
              "unpacked_addon_fields": "using_priority_queue",
              "sort_mode": "<fixed_sort_key, rowid>"
            }
          }
        ]
      }
    }
  ]
}