Query time 0.00050
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "144.01"
},
"nested_loop": [
{
"table": {
"table_name": "p",
"access_type": "range",
"possible_keys": [
"PRIMARY",
"idx_group_id"
],
"key": "PRIMARY",
"used_key_parts": [
"product_id"
],
"key_length": "4",
"rows_examined_per_scan": 30,
"rows_produced_per_join": 30,
"filtered": "100.00",
"index_condition": "(`portal`.`p`.`product_id` in (14849,14850,14851,14852,14853,14855,14858,14860,14861,14862,14875,14880,14881,14894,14933,15229,15284,15285,15288,15519,15712,15713,15726,15772,15778,15837,15866,15867,15868,15872))",
"cost_info": {
"read_cost": "66.01",
"eval_cost": "6.00",
"prefix_cost": "72.01",
"data_read_per_join": "480"
},
"used_columns": [
"product_id",
"parent_product_id",
"group_id"
]
}
},
{
"table": {
"table_name": "g",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"id"
],
"key_length": "4",
"ref": [
"portal.p.group_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 30,
"filtered": "100.00",
"cost_info": {
"read_cost": "30.00",
"eval_cost": "6.00",
"prefix_cost": "108.01",
"data_read_per_join": "22K"
},
"used_columns": [
"id",
"code"
]
}
},
{
"table": {
"table_name": "f",
"access_type": "ref",
"possible_keys": [
"idx_group_id"
],
"key": "idx_group_id",
"used_key_parts": [
"group_id"
],
"key_length": "4",
"ref": [
"portal.p.group_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 30,
"filtered": "100.00",
"cost_info": {
"read_cost": "30.00",
"eval_cost": "6.00",
"prefix_cost": "144.01",
"data_read_per_join": "3K"
},
"used_columns": [
"feature_id",
"purpose",
"group_id"
]
}
}
]
}
}