Query time 0.00046
JSON explain
{
"query_block": {
"select_id": 1,
"cost_info": {
"query_cost": "2.88"
},
"ordering_operation": {
"using_filesort": true,
"nested_loop": [
{
"table": {
"table_name": "cscart_discussion_posts",
"access_type": "ref",
"possible_keys": [
"thread_id",
"thread_id_2"
],
"key": "thread_id",
"used_key_parts": [
"thread_id"
],
"key_length": "3",
"ref": [
"const"
],
"rows_examined_per_scan": 2,
"rows_produced_per_join": 0,
"filtered": "10.00",
"index_condition": "(`satishecarter_dec_setup_001`.`cscart_discussion_posts`.`thread_id` <=> 26)",
"cost_info": {
"read_cost": "2.00",
"eval_cost": "0.04",
"prefix_cost": "2.40",
"data_read_per_join": "89"
},
"used_columns": [
"post_id",
"thread_id",
"name",
"timestamp",
"user_id",
"ip_address",
"status"
],
"attached_condition": "(`satishecarter_dec_setup_001`.`cscart_discussion_posts`.`status` = 'A')"
}
},
{
"table": {
"table_name": "cscart_discussion_messages",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"post_id"
],
"key_length": "3",
"ref": [
"satishecarter_dec_setup_001.cscart_discussion_posts.post_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.20",
"eval_cost": "0.04",
"prefix_cost": "2.64",
"data_read_per_join": "4"
},
"used_columns": [
"message",
"post_id"
]
}
},
{
"table": {
"table_name": "cscart_discussion_rating",
"access_type": "eq_ref",
"possible_keys": [
"PRIMARY"
],
"key": "PRIMARY",
"used_key_parts": [
"post_id"
],
"key_length": "3",
"ref": [
"satishecarter_dec_setup_001.cscart_discussion_posts.post_id"
],
"rows_examined_per_scan": 1,
"rows_produced_per_join": 0,
"filtered": "100.00",
"cost_info": {
"read_cost": "0.20",
"eval_cost": "0.04",
"prefix_cost": "2.88",
"data_read_per_join": "3"
},
"used_columns": [
"rating_value",
"post_id"
]
}
}
]
}
}
}
Result
post_id |
thread_id |
name |
timestamp |
user_id |
ip_address |
status |
message |
rating_value |
18 |
26 |
Alex |
1383914729 |
0 |
10.7.7.93 |
A |
You guys have the BEST customer service known to man!!! I have always been impressed with how fast you help us out! |
4 |
19 |
26 |
Michael |
1383914678 |
0 |
10.7.7.93 |
A |
You're the best! Thank you most graciously and appreciatively! |
5 |