Skip to content

perf: improve generate Oracle SQL #484

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
ulleo merged 1 commit into from
Nov 24, 2025
Merged

perf: improve generate Oracle SQL #484

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
29 changes: 29 additions & 0 deletions backend/templates/sql_examples/Oracle.yaml
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,9 @@ template:
1. 传统写法：WHERE ROWNUM <= 100
2. 现代写法：FETCH FIRST 100 ROWS ONLY
</note>
<note>
使用传统 ROWNUM 写法时，若遇到需要分组 GROUP BY 的情况，需要将限制条数的 ROWNUM 写在最外层，不然会影响最后查询出数据的总条数
</note>
</rule>

other_rule: |
Expand Down Expand Up @@ -71,6 +74,32 @@ template:
AND ROWNUM <= 1000
</output-good>
</example>

<example>
<input>统计用户表 PUBLIC.USERS 各部门人数</input>
<output-bad>
SELECT
"u"."DEPARTMENT" AS "department_name",
count(*) AS "user_count"
FROM "PUBLIC"."USERS" "u"
WHERE "u"."status" = 1
AND ROWNUM <= 100
GROUP BY "u"."DEPARTMENT"
ORDER BY "department_name" -- 错误：ROWNUM 应当写在最外层，这样会导致查询结果条数比实际数据的数量少
</output-bad>
<output-good>
SELECT "department_name", "user_count" FROM (
SELECT
"u"."DEPARTMENT" AS "department_name",
count(*) AS "user_count"
FROM "PUBLIC"."USERS" "u"
WHERE "u"."status" = 1
GROUP BY "u"."DEPARTMENT"
ORDER BY "department_name"
)
WHERE ROWNUM <= 100
</output-good>
</example>
</basic-examples>

example_engine: Oracle 19c
Expand Down