From 3e394b86bceb1328125d80009defaa46229567c6 Mon Sep 17 00:00:00 2001 From: Grace Cai Date: Fri, 20 Jun 2025 14:44:00 +0800 Subject: [PATCH 1/3] Add temp.md --- temp.md | 1 + 1 file changed, 1 insertion(+) create mode 100644 temp.md diff --git a/temp.md b/temp.md new file mode 100644 index 000000000000..af27ff4986a7 --- /dev/null +++ b/temp.md @@ -0,0 +1 @@ +This is a test file. \ No newline at end of file From 5d45f9b1de5c193c0519231efd5e20358266e779 Mon Sep 17 00:00:00 2001 From: Grace Cai Date: Fri, 20 Jun 2025 14:44:05 +0800 Subject: [PATCH 2/3] Delete temp.md --- temp.md | 1 - 1 file changed, 1 deletion(-) delete mode 100644 temp.md diff --git a/temp.md b/temp.md deleted file mode 100644 index af27ff4986a7..000000000000 --- a/temp.md +++ /dev/null @@ -1 +0,0 @@ -This is a test file. \ No newline at end of file From f0da3da7596237244d3e59ba1b2afc5073cfb9bd Mon Sep 17 00:00:00 2001 From: Test User Date: Mon, 23 Jun 2025 13:06:36 +0800 Subject: [PATCH 3/3] Update explain-walkthrough.md --- explain-walkthrough.md | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/explain-walkthrough.md b/explain-walkthrough.md index d2ceeb4bcebb..957cdd2c34b5 100644 --- a/explain-walkthrough.md +++ b/explain-walkthrough.md @@ -67,7 +67,7 @@ EXPLAIN ANALYZE SELECT count(*) FROM trips WHERE start_date BETWEEN '2017-07-01 5 rows in set (1.03 sec) ``` -执行以上示例查询耗时 `1.03` 秒，说明执行性能较为理想。 +执行以上示例查询耗时 `1.03` 秒，说明执行性能不太理想。 以上 `EXPLAIN ANALYZE` 的结果中，`actRows` 表明一些 `estRows` 预估数不准确（预估返回 10000 行数据但实际返回 19117643 行）。`└─TableFullScan_18` 算子的 `operator info` 列 (`stats:pseudo`) 信息也表明该算子的预估数不准确。