Query time 0.00099
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "7.29"
},
"grouping_operation": {
"using_temporary_table": true,
"using_filesort": true,
"cost_info": {
"sort_cost": "0.10"
},
"nested_loop": [
{
"table": {
"table_name": "dp",
"access_type": "index",
"possible_keys": [
"thread_id",
"thread_id_2"
],
"key": "thread_id_2",
"used_key_parts": [
"thread_id",
"status"
],
"key_length": "6",
"rows_examined_per_scan": 19,
"rows_produced_per_join": 1,
"filtered": "10.00",
"using_index": true,
"cost_info": {
"read_cost": "4.42",
"eval_cost": "0.38",
"prefix_cost": "4.80",
"data_read_per_join": "851"
},
"used_columns": [
"post_id",
"thread_id",
"status"
],
"attached_condition": "(`webmarco`.`dp`.`status` = 'A')"
}
},
{
"table": {
"table_name": "cscart_discussion",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"object_id"
],
"key": "PRIMARY",
"used_key_parts": [
"thread_id"
],
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"ref": [
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],
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"eval_cost": "0.02",
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"data_read_per_join": "2"
},
"used_columns": [
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],
"attached_condition": "((`webmarco`.`cscart_discussion`.`object_id` in (263772,264756,264757,264758,264759,263981,264764,264765,264766,264767,264304,264819,264820,264821,264822,264824,264825,264826,264208,264847,264848,264849,264850,264851,264852,264853,264854,264855,264226,264884,264885,264886,264887,264888,264889,264890,264891,264892,264893,264894,264895,264896,264897,264219,264909,264910,264911,264912,264913,264914,264915,264916,264917,264193,264918,264919,264920,264921,264922,264923,264924,264925,264926,264156,264927,264928,264929,264930,264931,264932,264933,264934,264935,264950,264951,264952,264953,264954,263720,264936,264937,264938,264939,264940,264941,264942,264943,264944,264945,264946,264947,264948,264949,264955,264956,264957,264958,264959,264705,264960,264961,264962,264963,264964,264965,264966,264967,264968,264102,264969,264970,264971,264972,264973,264974,264975,264976,264977)) and (`webmarco`.`cscart_discussion`.`object_type` = 'P'))"
}
},
{
"table": {
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"access_type": "eq_ref",
"possible_keys": [
"PRIMARY",
"age_verification",
"status",
"idx_parent_product_id",
"idx_master_product_id"
],
"key": "PRIMARY",
"used_key_parts": [
"product_id"
],
"key_length": "3",
"ref": [
"webmarco.cscart_discussion.object_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"using_index": true,
"cost_info": {
"read_cost": "0.10",
"eval_cost": "0.02",
"prefix_cost": "7.19",
"data_read_per_join": "760"
},
"used_columns": [
"product_id"
]
}
}
]
}
}
}