gistfile1.txt

 {
  "steps": [
    {
      "join_preparation": {
        "select#": 1,
        "steps": [
          {
            "expanded_query": "/* select#1 */ select `pi1`.`price` AS `price`,`pi1`.`dateandtime` AS `dateandtime`,`pi1`.`customerid` AS `customerid` from `pi1` FORCE INDEX (`pi1_pdc`) where (`pi1`.`price` >= 852.366314) order by `pi1`.`price`,`pi1`.`dateandtime`,`pi1`.`customerid` limit 10"
          }
        ]
      }
    },
    {
      "join_optimization": {
        "select#": 1,
        "steps": [
          {
            "condition_processing": {
              "condition": "WHERE",
              "original_condition": "(`pi1`.`price` >= 852.366314)",
              "steps": [
                {
                  "transformation": "equality_propagation",
                  "resulting_condition": "(`pi1`.`price` >= 852.366314)"
                },
                {
                  "transformation": "constant_propagation",
                  "resulting_condition": "(`pi1`.`price` >= 852.366314)"
                },
                {
                  "transformation": "trivial_condition_removal",
                  "resulting_condition": "(`pi1`.`price` >= 852.366314)"
                }
              ]
            }
          },
          {
            "table_dependencies": [
              {
                "table": "`pi1` FORCE INDEX (`pi1_pdc`)",
                "row_may_be_null": false,
                "map_bit": 0,
                "depends_on_map_bits": [
                ]
              }
            ]
          },
          {
            "ref_optimizer_key_uses": [
            ]
          },
          {
            "rows_estimation": [
              {
                "table": "`pi1` FORCE INDEX (`pi1_pdc`)",
                "range_analysis": {
                  "table_scan": {
                    "rows": 508579538,
                    "cost": 2e308
                  },
                  "potential_range_indices": [
                    {
                      "index": "PRIMARY",
                      "usable": false,
                      "cause": "not_applicable"
                    },
                    {
                      "index": "pi1_marketsegment",
                      "usable": false,
                      "cause": "not_applicable"
                    },
                    {
                      "index": "pi1_registersegment",
                      "usable": false,
                      "cause": "not_applicable"
                    },
                    {
                      "index": "pi1_pdc",
                      "usable": true,
                      "key_parts": [
                        "price",
                        "dateandtime",
                        "customerid",
                        "transactionid"
                      ]
                    }
                  ],
                  "best_covering_index_scan": {
                    "index": "pi1_pdc",
                    "cost": 1.03e8,
                    "chosen": true
                  },
                  "setup_range_conditions": [
                  ],
                  "group_index_range": {
                    "chosen": false,
                    "cause": "not_group_by_or_distinct"
                  },
                  "analyzing_range_alternatives": {
                    "range_scan_alternatives": [
                      {
                        "index": "pi1_pdc",
                        "ranges": [
                          "852.366 <= price"
                        ],
                        "index_dives_for_eq_ranges": true,
                        "rowid_ordered": false,
                        "using_mrr": false,
                        "index_only": true,
                        "rows": 154200716,
                        "cost": 3.13e7,
                        "chosen": true
                      }
                    ],
                    "analyzing_roworder_intersect": {
                      "usable": false,
                      "cause": "too_few_roworder_scans"
                    }
                  },
                  "chosen_range_access_summary": {
                    "range_access_plan": {
                      "type": "range_scan",
                      "index": "pi1_pdc",
                      "rows": 154200716,
                      "ranges": [
                        "852.366 <= price"
                      ]
                    },
                    "rows_for_plan": 154200716,
                    "cost_for_plan": 3.13e7,
                    "chosen": true
                  }
                }
              }
            ]
          },
          {
            "considered_execution_plans": [
              {
                "plan_prefix": [
                ],
                "table": "`pi1` FORCE INDEX (`pi1_pdc`)",
                "best_access_path": {
                  "considered_access_paths": [
                    {
                      "access_type": "range",
                      "rows": 1.54e8,
                      "cost": 6.21e7,
                      "chosen": true
                    }
                  ]
                },
                "cost_for_plan": 6.21e7,
                "rows_for_plan": 1.54e8,
                "chosen": true
              }
            ]
          },
          {
            "attaching_conditions_to_tables": {
              "original_condition": "(`pi1`.`price` >= 852.366314)",
              "attached_conditions_computation": [
                {
                  "table": "`pi1` FORCE INDEX (`pi1_pdc`)",
                  "rechecking_index_usage": {
                    "recheck_reason": "low_limit",
                    "limit": 10,
                    "row_estimate": 1.54e8
                  }
                }
              ],
              "attached_conditions_summary": [
                {
                  "table": "`pi1` FORCE INDEX (`pi1_pdc`)",
                  "attached": "(`pi1`.`price` >= 852.366314)"
                }
              ]
            }
          },
          {
            "clause_processing": {
              "clause": "ORDER BY",
              "original_clause": "`pi1`.`price`,`pi1`.`dateandtime`,`pi1`.`customerid`",
              "items": [
                {
                  "item": "`pi1`.`price`"
                },
                {
                  "item": "`pi1`.`dateandtime`"
                },
                {
                  "item": "`pi1`.`customerid`"
                }
              ],
              "resulting_clause_is_simple": true,
              "resulting_clause": "`pi1`.`price`,`pi1`.`dateandtime`,`pi1`.`customerid`"
            }
          },
          {
            "refine_plan": [
              {
                "table": "`pi1` FORCE INDEX (`pi1_pdc`)",
                "access_type": "range"
              }
            ]
          },
          {
            "reconsidering_access_paths_for_index_ordering": {
              "clause": "ORDER BY",
              "index_order_summary": {
                "table": "`pi1` FORCE INDEX (`pi1_pdc`)",
                "index_provides_order": true,
                "order_direction": "asc",
                "index": "pi1_pdc",
                "plan_changed": false
              }
            }
          }
        ]
      }
    },
    {
      "join_execution": {
        "select#": 1,
        "steps": [
        ]
      }
    }
  ]