Query time 0.00044
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "134.41"
},
"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": 28,
"rows_produced_per_join": 28,
"filtered": "100.00",
"index_condition": "(`portal`.`p`.`product_id` in (1593,1594,1595,1596,1597,1598,1599,1600,1601,1602,1603,1605,1606,1607,1610,1611,1612,1613,1614,1615,1616,1617,1618,1624,1625,1626,1627,1628))",
"cost_info": {
"read_cost": "61.61",
"eval_cost": "5.60",
"prefix_cost": "67.21",
"data_read_per_join": "448"
},
"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": 28,
"filtered": "100.00",
"cost_info": {
"read_cost": "28.00",
"eval_cost": "5.60",
"prefix_cost": "100.81",
"data_read_per_join": "21K"
},
"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": 28,
"filtered": "100.00",
"cost_info": {
"read_cost": "28.00",
"eval_cost": "5.60",
"prefix_cost": "134.41",
"data_read_per_join": "3K"
},
"used_columns": [
"feature_id",
"purpose",
"group_id"
]
}
}
]
}
}