query one

{
  "steps": [
    {
      "join_preparation": {
        "select#": 1,
        "steps": [
          {
            "expanded_query": "/* select#1 */ select `datayesdb`.`idx_weight`.`SECURITY_ID` AS `SECURITY_ID`,min(`datayesdb`.`idx_weight`.`EFF_DATE`) AS `startDate`,max(`datayesdb`.`idx_weight`.`EFF_DATE`) AS `endDate` from `datayesdb`.`idx_weight` where (`datayesdb`.`idx_weight`.`SECURITY_ID` = 1782)"
          }
        ]
      }
    },
    {
      "join_optimization": {
        "select#": 1,
        "steps": [
          {
            "condition_processing": {
              "condition": "WHERE",
              "original_condition": "(`datayesdb`.`idx_weight`.`SECURITY_ID` = 1782)",
              "steps": [
                {
                  "transformation": "equality_propagation",
                  "resulting_condition": "multiple equal(1782, `datayesdb`.`idx_weight`.`SECURITY_ID`)"
                },
                {
                  "transformation": "constant_propagation",
                  "resulting_condition": "multiple equal(1782, `datayesdb`.`idx_weight`.`SECURITY_ID`)"
                },
                {
                  "transformation": "trivial_condition_removal",
                  "resulting_condition": "multiple equal(1782, `datayesdb`.`idx_weight`.`SECURITY_ID`)"
                }
              ]
            }
          },
          {
            "table_dependencies": [
              {
                "table": "`datayesdb`.`idx_weight`",
                "row_may_be_null": false,
                "map_bit": 0,
                "depends_on_map_bits": [
                ]
              }
            ]
          },
          {
            "ref_optimizer_key_uses": [
              {
                "table": "`datayesdb`.`idx_weight`",
                "field": "SECURITY_ID",
                "equals": "1782",
                "null_rejecting": false
              },
              {
                "table": "`datayesdb`.`idx_weight`",
                "field": "SECURITY_ID",
                "equals": "1782",
                "null_rejecting": false
              }
            ]
          },
          {
            "rows_estimation": [
              {
                "table": "`datayesdb`.`idx_weight`",
                "range_analysis": {
                  "table_scan": {
                    "rows": 68945218,
                    "cost": 1.42e7
                  },
                  "potential_range_indices": [
                    {
                      "index": "PRIMARY",
                      "usable": false,
                      "cause": "not_applicable"
                    },
                    {
                      "index": "BPK_AK",
                      "usable": true,
                      "key_parts": [
                        "SECURITY_ID",
                        "CONS_ID",
                        "EFF_DATE"
                      ]
                    },
                    {
                      "index": "tmst",
                      "usable": false,
                      "cause": "not_applicable"
                    },
                    {
                      "index": "idx_weight_ix",
                      "usable": true,
                      "key_parts": [
                        "SECURITY_ID",
                        "EFF_DATE",
                        "ID"
                      ]
                    }
                  ],
                  "best_covering_index_scan": {
                    "index": "idx_weight_ix",
                    "cost": 1.39e7,
                    "chosen": true
                  },
                  "setup_range_conditions": [
                  ],
                  "group_index_range": {
                    "chosen": false,
                    "cause": "not_group_by_or_distinct"
                  },
                  "analyzing_range_alternatives": {
                    "range_scan_alternatives": [
                      {
                        "index": "BPK_AK",
                        "ranges": [
                          "1782 <= SECURITY_ID <= 1782"
                        ],
                        "index_dives_for_eq_ranges": true,
                        "rowid_ordered": false,
                        "using_mrr": false,
                        "index_only": true,
                        "rows": 1031808,
                        "cost": 209757,
                        "chosen": true
                      },
                      {
                        "index": "idx_weight_ix",
                        "ranges": [
                          "1782 <= SECURITY_ID <= 1782"
                        ],
                        "index_dives_for_eq_ranges": true,
                        "rowid_ordered": false,
                        "using_mrr": false,
                        "index_only": true,
                        "rows": 887856,
                        "cost": 179627,
                        "chosen": true
                      }
                    ],
                    "analyzing_roworder_intersect": {
                      "usable": false,
                      "cause": "too_few_roworder_scans"
                    }
                  },
                  "chosen_range_access_summary": {
                    "range_access_plan": {
                      "type": "range_scan",
                      "index": "idx_weight_ix",
                      "rows": 887856,
                      "ranges": [
                        "1782 <= SECURITY_ID <= 1782"
                      ]
                    },
                    "rows_for_plan": 887856,
                    "cost_for_plan": 179627,
                    "chosen": true
                  }
                }
              }
            ]
          },
          {
            "considered_execution_plans": [
              {
                "plan_prefix": [
                ],
                "table": "`datayesdb`.`idx_weight`",
                "best_access_path": {
                  "considered_access_paths": [
                    {
                      "access_type": "ref",
                      "index": "BPK_AK",
                      "rows": 1.03e6,
                      "cost": 209757,
                      "chosen": true
                    },
                    {
                      "access_type": "ref",
                      "index": "idx_weight_ix",
                      "rows": 887856,
                      "cost": 179627,
                      "chosen": true
                    },
                    {
                      "access_type": "range",
                      "cause": "heuristic_index_cheaper",
                      "chosen": false
                    }
                  ]
                },
                "cost_for_plan": 179627,
                "rows_for_plan": 887856,
                "chosen": true
              }
            ]
          },
          {
            "attaching_conditions_to_tables": {
              "original_condition": "(`datayesdb`.`idx_weight`.`SECURITY_ID` = 1782)",
              "attached_conditions_computation": [
              ],
              "attached_conditions_summary": [
                {
                  "table": "`datayesdb`.`idx_weight`",
                  "attached": null
                }
              ]
            }
          },
          {
            "refine_plan": [
              {
                "table": "`datayesdb`.`idx_weight`"
              }
            ]
          }
        ]
      }
    },
    {
      "join_execution": {
        "select#": 1,
        "steps": [
        ]
      }
    }
  ]
}