diff --git a/identify-slow-queries.md b/identify-slow-queries.md
index 0562c05da777d..90d89110da4dc 100644
--- a/identify-slow-queries.md
+++ b/identify-slow-queries.md
@@ -33,6 +33,8 @@ TiDB enables the slow query log by default. You can enable or disable the featur
 # Cop_backoff_rpcPD_total_times: 200 Cop_backoff_rpcPD_total_time: 0.2 Cop_backoff_rpcPD_max_time: 0.2 Cop_backoff_rpcPD_max_addr: 127.0.0.1 Cop_backoff_rpcPD_avg_time: 0.2 Cop_backoff_rpcPD_p90_time: 0.2
 # Cop_backoff_rpcTiKV_total_times: 200 Cop_backoff_rpcTiKV_total_time: 0.2 Cop_backoff_rpcTiKV_max_time: 0.2 Cop_backoff_rpcTiKV_max_addr: 127.0.0.1 Cop_backoff_rpcTiKV_avg_time: 0.2 Cop_backoff_rpcTiKV_p90_time: 0.2
 # Mem_max: 525211
+# Prepared: false
+# Plan_from_cache: false
 # Succ: true
 # Plan: tidb_decode_plan('ZJAwCTMyXzcJMAkyMAlkYXRhOlRhYmxlU2Nhbl82CjEJMTBfNgkxAR0AdAEY1Dp0LCByYW5nZTpbLWluZiwraW5mXSwga2VlcCBvcmRlcjpmYWxzZSwgc3RhdHM6cHNldWRvCg==')
 insert into t select * from t;
@@ -58,6 +60,8 @@ Slow query basics:
 * `Succ`: Whether a statement is executed successfully.
 * `Backoff_time`: The waiting time before retry when a statement encounters errors that require a retry. The common errors as such include: `lock occurs`, `Region split`, and `tikv server is busy`.
 * `Plan`: The execution plan of the statement. Use the `select tidb_decode_plan('xxx...')` statement to parse the specific execution plan.
+* `Prepared`: Whether this statement is a `Prepare` or `Execute` request or not.
+* `Plan_from_cache`: Whether this statement hits the execution plan cache.
 
 The following fields are related to transaction execution: