Query time 0.00235
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"
],
"key_length": "3",
"ref": [
"webmarco.dp.thread_id"
],
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"cost_info": {
"read_cost": "1.90",
"eval_cost": "0.02",
"prefix_cost": "7.08",
"data_read_per_join": "2"
},
"used_columns": [
"thread_id",
"object_id",
"object_type"
],
"attached_condition": "((`webmarco`.`cscart_discussion`.`object_id` in (309585,309586,359805,435519,359744,359746,359752,359753,359772,395983,395984,395985,395986,395987,395988,395989,395990,395991,395992,395993,395994,395995,396002,396003,396004,396005,396006,396007,396008,396009,396010,396011,396012,396018,396019,396020,396021,396022,396023,396024,396025,396027,396028,396029,396030,396031,396032,396033,396034,396035,414408,414409,414410,414411,414412,414413,414436,414437,414438,414439,414440,414441,431542,431543,431544,431545,431546,431547,431548,431549,431550,431551,431677,431678,431679,431680,431681,431682,431683,431684,431685,431686,431561,431562,431563,431564,431565,431566,431567,431568,431569,431587,431588,431589,431590,431591,431592,431593,431594,431595,431596,431597,431598,431599,431600,431601,431602,431603,431604,431605,431606,431607,431608,431609,431610,431611,431612,431613,431614,431659,431660,431661,431662,431663,431664,431665,431666,431734,431735,431736,431737,431738,431739,431740,431741,431742,431767,431768,431769,431770,431771,431772,431773,431774,431775)) 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,
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"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"
]
}
}
]
}
}
}