# 5.6
{
  "steps": [
    {
      "join_preparation": {
        "select#": 1,
        "steps": [
          {
            "expanded_query": "/* select#1 */ select distinct `i`.`Name` AS `Name`,`d`.`id` AS `id`,`i`.`deviceType` AS `deviceType`,`i`.`issuedBy` AS `issuedBy`,`d`.`description` AS `description`,`i`.`avNum` AS `avNum`,`d`.`CompanyName` AS `CompanyName`,`d`.`BrandName` AS `BrandName`,`d`.`dwNumber` AS `dwNumber`,`i`.`quant` AS `quant`,`i`.`discDate` AS `discDate`,`i`.`Type` AS `Type` from (`table_one` `d` join `table_two` `i` on((`d`.`id` = `i`.`id`)))"
          }
        ]
      }
    },
    {
      "join_optimization": {
        "select#": 1,
        "steps": [
          {
            "transformations_to_nested_joins": {
              "transformations": [
                "JOIN_condition_to_WHERE",
                "parenthesis_removal"
              ],
              "expanded_query": "/* select#1 */ select distinct `i`.`Name` AS `Name`,`d`.`id` AS `id`,`i`.`deviceType` AS `deviceType`,`i`.`issuedBy` AS `issuedBy`,`d`.`description` AS `description`,`i`.`avNum` AS `avNum`,`d`.`CompanyName` AS `CompanyName`,`d`.`BrandName` AS `BrandName`,`d`.`dwNumber` AS `dwNumber`,`i`.`quant` AS `quant`,`i`.`discDate` AS `discDate`,`i`.`Type` AS `Type` from `table_one` `d` join `table_two` `i` where (`d`.`id` = `i`.`id`)"
            }
          },
          {
            "condition_processing": {
              "condition": "WHERE",
              "original_condition": "(`d`.`id` = `i`.`id`)",
              "steps": [
                {
                  "transformation": "equality_propagation",
                  "resulting_condition": "multiple equal(`d`.`id`, `i`.`id`)"
                },
                {
                  "transformation": "constant_propagation",
                  "resulting_condition": "multiple equal(`d`.`id`, `i`.`id`)"
                },
                {
                  "transformation": "trivial_condition_removal",
                  "resulting_condition": "multiple equal(`d`.`id`, `i`.`id`)"
                }
              ]
            }
          },
          {
            "table_dependencies": [
              {
                "table": "`table_one` `d`",
                "row_may_be_null": false,
                "map_bit": 0,
                "depends_on_map_bits": [
                ]
              },
              {
                "table": "`table_two` `i`",
                "row_may_be_null": false,
                "map_bit": 1,
                "depends_on_map_bits": [
                ]
              }
            ]
          },
          {
            "ref_optimizer_key_uses": [
              {
                "table": "`table_one` `d`",
                "field": "id",
                "equals": "`i`.`id`",
                "null_rejecting": true
              },
              {
                "table": "`table_two` `i`",
                "field": "id",
                "equals": "`d`.`id`",
                "null_rejecting": false
              }
            ]
          },
          {
            "rows_estimation": [
              {
                "table": "`table_one` `d`",
                "table_scan": {
                  "rows": 1596593,
                  "cost": 40576
                }
              },
              {
                "table": "`table_two` `i`",
                "table_scan": {
                  "rows": 2384739,
                  "cost": 12239
                }
              }
            ]
          },
          {
            "considered_execution_plans": [
              {
                "plan_prefix": [
                ],
                "table": "`table_one` `d`",
                "best_access_path": {
                  "considered_access_paths": [
                    {
                      "access_type": "ref",
                      "index": "PRIMARY",
                      "usable": false,
                      "chosen": false
                    },
                    {
                      "access_type": "scan",
                      "rows": 1.6e6,
                      "cost": 359895,
                      "chosen": true
                    }
                  ]
                },
                "cost_for_plan": 359895,
                "rows_for_plan": 1.6e6,
                "rest_of_plan": [
                  {
                    "plan_prefix": [
                      "`table_one` `d`"
                    ],
                    "table": "`table_two` `i`",
                    "best_access_path": {
                      "considered_access_paths": [
                        {
                          "access_type": "ref",
                          "index": "idx_table_two_id",
                          "rows": 1,
                          "cost": 1.6e6,
                          "chosen": true
                        },
                        {
                          "access_type": "scan",
                          "using_join_cache": true,
                          "rows": 1.79e6,
                          "cost": 5.7e11,
                          "chosen": false
                        }
                      ]
                    },
                    "cost_for_plan": 2.28e6,
                    "rows_for_plan": 1.6e6,
                    "chosen": true
                  }
                ]
              },
              {
                "plan_prefix": [
                ],
                "table": "`table_two` `i`",
                "best_access_path": {
                  "considered_access_paths": [
                    {
                      "access_type": "ref",
                      "index": "idx_table_two_id",
                      "usable": false,
                      "chosen": false
                    },
                    {
                      "access_type": "scan",
                      "rows": 2.38e6,
                      "cost": 489187,
                      "chosen": true
                    }
                  ]
                },
                "cost_for_plan": 489187,
                "rows_for_plan": 2.38e6,
                "rest_of_plan": [
                  {
                    "plan_prefix": [
                      "`table_two` `i`"
                    ],
                    "table": "`table_one` `d`",
                    "best_access_path": {
                      "considered_access_paths": [
                        {
                          "access_type": "ref",
                          "index": "PRIMARY",
                          "rows": 1,
                          "cost": 2.38e6,
                          "chosen": true
                        },
                        {
                          "access_type": "scan",
                          "using_join_cache": true,
                          "rows": 1.2e6,
                          "cost": 5.7e11,
                          "chosen": false
                        }
                      ]
                    },
                    "cost_for_plan": 3.35e6,
                    "rows_for_plan": 2.38e6,
                    "pruned_by_cost": true
                  }
                ]
              }
            ]
          },
          {
            "attaching_conditions_to_tables": {
              "original_condition": "(`i`.`id` = `d`.`id`)",
              "attached_conditions_computation": [
              ],
              "attached_conditions_summary": [
                {
                  "table": "`table_one` `d`",
                  "attached": null
                },
                {
                  "table": "`table_two` `i`",
                  "attached": null
                }
              ]
            }
          },
          {
            "refine_plan": [
              {
                "table": "`table_one` `d`",
                "access_type": "table_scan"
              },
              {
                "table": "`table_two` `i`"
              }
            ]
          }
        ]
      }
    },
    {
      "join_execution": {
        "select#": 1,
        "steps": [
          {
            "creating_tmp_table": {
              "tmp_table_info": {
                "table": "intermediate_tmp_table",
                "row_length": 4566,
                "key_length": 4585,
                "unique_constraint": false,
                "location": "memory (heap)",
                "row_limit_estimate": 3674
              }
            }
          },
          {
            "converting_tmp_table_to_myisam": {
              "cause": "memory_table_size_exceeded",
              "tmp_table_info": {
                "table": "intermediate_tmp_table",
                "row_length": 4570,
                "key_length": 4585,
                "unique_constraint": true,
                "location": "disk (MyISAM)",
                "record_format": "packed"
              }
            }
          }
        ]
      }
    }
  ]
}