From 033a245abb822af0baaba915e2300921b9190cea Mon Sep 17 00:00:00 2001
From: yuetsh <517252939@qq.com>
Date: Fri, 9 Oct 2026 19:17:42 +0800
Subject: [PATCH] =?UTF-8?q?feat(SQL=20=E9=A2=98):=20=E5=A2=9E=E5=88=A0?=
 =?UTF-8?q?=E6=94=B9=E9=A2=98=E9=99=A4=E4=BA=86=E7=AC=AC=201=20=E7=BB=84?=
 =?UTF-8?q?=EF=BC=8C=E5=85=B6=E4=BD=99=E6=B5=8B=E8=AF=95=E6=95=B0=E6=8D=AE?=
 =?UTF-8?q?=E5=8F=AF=E4=BB=A5=E4=B8=80=E8=A1=8C=E9=83=BD=E4=B8=8D=E6=94=B9?=
 =?UTF-8?q?=E2=80=94=E2=80=94=E7=94=A8=E6=9D=A5=E6=8A=93=E5=AD=A6=E7=94=9F?=
 =?UTF-8?q?=E5=A4=9A=E6=94=B9=EF=BC=88WHERE=20=E5=86=99=E6=BC=8F=E3=80=81?=
 =?UTF-8?q?=E5=86=99=E5=AE=BD=EF=BC=89?=
MIME-Version: 1.0
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Content-Transfer-Encoding: 8bit

原来每组数据都必须有被标准答案改到的行，所以「这组里没有研发部，看学生会不会把别的部门也改了」
这种测试数据建不了。现在只有第 1 组（题面上给学生看的那组）还要求改到行；其余组一行都没改时
出题页写「一行都没改」、预览写「执行后所有表都没有变化」。删掉第 1 组、别的组顶上来时自动按
新位置重查。判题本来就不管这一条，不受影响。

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
---
 apps/api/src/judge/sql/child.ts                      |  9 ++++++++-
 apps/api/src/judge/sql/engine.ts                     | 10 +++++++++-
 apps/api/src/judge/sql/index.ts                      | 10 ++++++++--
 apps/api/src/routes/admin/problem.ts                 |  7 ++++++-
 apps/web/src/admin/api.ts                            |  2 ++
 apps/web/src/admin/problem/SqlDetail.vue             | 12 +++++++++---
 apps/web/src/admin/problem/components/sqlScript.ts   |  2 +-
 .../web/src/oj/problem/components/SqlProblemData.vue |  6 ++++++
 packages/contract/src/admin.ts                       |  5 +++++
 9 files changed, 54 insertions(+), 9 deletions(-)

diff --git a/apps/api/src/judge/sql/child.ts b/apps/api/src/judge/sql/child.ts
index b40a463..696bd66 100644
--- a/apps/api/src/judge/sql/child.ts
+++ b/apps/api/src/judge/sql/child.ts
@@ -34,6 +34,7 @@ export type SqlJob =
       initSql: string
       refSql: string
       mode: "query" | "modify"
+      requireChange: boolean
     }
 
 /**
@@ -76,7 +77,13 @@ export async function runSqlChild() {
   try {
     if (job.kind === "display") {
       markPhase("display")
-      const display = await buildDisplay(job.initSql, job.refSql, job.mode)
+      const display = await buildDisplay(
+        job.initSql,
+        job.refSql,
+        job.mode,
+        undefined,
+        job.requireChange,
+      )
       finish({ ok: true, display })
     }
     // 阶段由 runCase 内部回调标记：prepare（受信脚本）→ student（学生 SQL）
diff --git a/apps/api/src/judge/sql/engine.ts b/apps/api/src/judge/sql/engine.ts
index 62449a4..e2be058 100644
--- a/apps/api/src/judge/sql/engine.ts
+++ b/apps/api/src/judge/sql/engine.ts
@@ -584,12 +584,19 @@ function queryResultColumns(names: string[], tables: DisplayTable[]) {
   return names.map((name) => ({ name, type: types.get(name) ?? "" }))
 }
 
-/** 生成题目页展示数据：初始数据表 + 期望结果。失败一律抛 SqlCaseError（出题配置问题） */
+/**
+ * 生成题目页展示数据：初始数据表 + 期望结果。失败一律抛 SqlCaseError（出题配置问题）。
+ *
+ * `requireChange`：增删改题的标准答案必须改到行。题面上展示的那组（第 1 组）必须 ——
+ * 学生要看着「执行后的表」知道该改什么；其余组可以一行都不改（看学生会不会多改），
+ * 这时 changed_tables 是空数组。判题（runCase）本来就不管这一条
+ */
 export async function buildDisplay(
   initSql: string,
   refSql: string,
   mode: "query" | "modify",
   memoryLimitMb = 64,
+  requireChange = true,
 ) {
   const SQL = await sqlEngine()
   const db = newDatabase(SQL, memoryLimitMb)
@@ -648,6 +655,7 @@ export async function buildDisplay(
       if (JSON.stringify(before[name]) !== JSON.stringify(after[name])) changed.add(name)
     }
     if (changed.size === 0) {
+      if (!requireChange) return { tables, expected: { changed_tables: [] } }
       throw new SqlCaseError(JudgeStatus.SYSTEM_ERROR, "标准答案未修改任何表数据，请检查题目配置")
     }
     const changedTables = dumpDisplayTables(db, changed)
diff --git a/apps/api/src/judge/sql/index.ts b/apps/api/src/judge/sql/index.ts
index 709f8ca..336d3d9 100644
--- a/apps/api/src/judge/sql/index.ts
+++ b/apps/api/src/judge/sql/index.ts
@@ -184,11 +184,17 @@ export function runSqlCase(job: Extract<SqlJob, { kind: "judge" }>) {
   })
 }
 
-export function buildSqlDisplay(initSql: string, refSql: string, mode: "query" | "modify") {
+/** `requireChange` 见 engine.ts 的 buildDisplay：只有题面上展示的那组必须改到行 */
+export function buildSqlDisplay(
+  initSql: string,
+  refSql: string,
+  mode: "query" | "modify",
+  requireChange = true,
+) {
   // 子进程产出的形状由 engine.ts 的 dumpDisplayTables / runDisplay 决定，就是契约里的
   // SqlDisplay —— 同一个仓库里的两端，不在这儿再 parse 一遍
   return runJob<SqlDisplay>(
-    { kind: "display", initSql, refSql, mode },
+    { kind: "display", initSql, refSql, mode, requireChange },
     { trustedMs: DISPLAY_BUDGET_MS, studentMs: null },
   )
 }
diff --git a/apps/api/src/routes/admin/problem.ts b/apps/api/src/routes/admin/problem.ts
index 3eba647..dddeb09 100644
--- a/apps/api/src/routes/admin/problem.ts
+++ b/apps/api/src/routes/admin/problem.ts
@@ -867,7 +867,12 @@ adminProblemRoutes.get("/problems/:id/sql-scripts", requireProblemPermission, as
 adminProblemRoutes.post("/sql-test-cases/preview", requireProblemPermission, async (c) => {
   const parsed = await parseBody(c, sqlPreviewRequestSchema)
   if (!parsed.success) return parsed.response
-  const outcome = await buildSqlDisplay(parsed.data.initSql, parsed.data.refSql, parsed.data.mode)
+  const outcome = await buildSqlDisplay(
+    parsed.data.initSql,
+    parsed.data.refSql,
+    parsed.data.mode,
+    parsed.data.shown,
+  )
   if (!outcome.ok) return failure(c, 400, "sql-preview-failed", outcome.message)
   return success(c, outcome.value)
 })
diff --git a/apps/web/src/admin/api.ts b/apps/web/src/admin/api.ts
index 186cccc..6c325b3 100644
--- a/apps/web/src/admin/api.ts
+++ b/apps/web/src/admin/api.ts
@@ -236,6 +236,8 @@ export function previewSQLTestcase(data: {
   initSql: string
   refSql: string
   mode: "query" | "modify"
+  /** 是不是题面上展示的那组（第 1 组）：增删改题只有它必须改到行 */
+  shown: boolean
 }) {
   return api.post<SqlDisplay>("admin/sql-test-cases/preview", data)
 }
diff --git a/apps/web/src/admin/problem/SqlDetail.vue b/apps/web/src/admin/problem/SqlDetail.vue
index afad4e8..ccb00b4 100644
--- a/apps/web/src/admin/problem/SqlDetail.vue
+++ b/apps/web/src/admin/problem/SqlDetail.vue
@@ -221,8 +221,12 @@ function onTagsChange(tags: string[]) {
 
 // ---------------------------------------------------------------- 测试数据：自动重跑
 
-/** 一组数据跑出来的结果取决于这三样，任何一样变了，原来的结果就作废 */
-const signatureOf = (g: ScriptGroup) => JSON.stringify([form.answer, form.sqlConfig.mode, g.sql])
+/**
+ * 一组数据跑出来的结果取决于这几样，任何一样变了，原来的结果就作废。
+ * 排在第一也算：删掉第 1 组之后，原来的第 2 组成了题面展示的那组，增删改题得重查它改没改到行
+ */
+const signatureOf = (g: ScriptGroup) =>
+  JSON.stringify([form.answer, form.sqlConfig.mode, g.sql, groups.value[0] === g])
 
 function statusOf(g: ScriptGroup): GroupStatus {
   if (!g.sql.trim()) return "empty"
@@ -243,6 +247,7 @@ async function run(g: ScriptGroup) {
       initSql: g.sql,
       refSql: form.answer,
       mode: form.sqlConfig.mode,
+      shown: groups.value[0] === g,
     })
   } catch (err) {
     errorRaw =
@@ -261,7 +266,8 @@ function runAll() {
 }
 
 watchDebounced(
-  () => [form.answer, form.sqlConfig.mode, groups.value.map((g) => g.sql)] as const,
+  // 带上 key：删组、挪了谁排第一也要重跑（见 signatureOf）
+  () => [form.answer, form.sqlConfig.mode, groups.value.map((g) => `${g.key}:${g.sql}`)] as const,
   runAll,
   { debounce: 600, deep: true },
 )
diff --git a/apps/web/src/admin/problem/components/sqlScript.ts b/apps/web/src/admin/problem/components/sqlScript.ts
index 1f77069..674c911 100644
--- a/apps/web/src/admin/problem/components/sqlScript.ts
+++ b/apps/web/src/admin/problem/components/sqlScript.ts
@@ -33,7 +33,7 @@ export function explainSqlError(message: string) {
     [/(\d+) values for (\d+) columns/, (m) => `一行给了 ${m[1]} 个值，但表有 ${m[2]} 列`],
   ]
   if (message.includes("标准答案未修改任何表数据")) {
-    return "标准答案在这组数据上一行都没改：增删改题的每组数据里都要有会被改到的行"
+    return "标准答案在这组数据上一行都没改：第 1 组是题面上给学生看的，里面要有会被改到的行"
   }
   for (const [pattern, say] of rules) {
     const match = message.match(pattern)
diff --git a/apps/web/src/oj/problem/components/SqlProblemData.vue b/apps/web/src/oj/problem/components/SqlProblemData.vue
index 6092c74..db9828b 100644
--- a/apps/web/src/oj/problem/components/SqlProblemData.vue
+++ b/apps/web/src/oj/problem/components/SqlProblemData.vue
@@ -33,6 +33,11 @@ const changedTables = computed(() => {
   }))
 })
 
+/** 增删改题里不是题面那组的测试数据可以一行都不改（看学生会不会多改），出题页预览会碰到 */
+const noChange = computed(
+  () => "changed_tables" in props.display.expected && !props.display.expected.changed_tables.length,
+)
+
 const anyChanged = computed(() =>
   changedTables.value.some(
     ({ changes }) => changes && (changes.cells.size > 0 || changes.newRows.size > 0),
@@ -83,6 +88,7 @@ const anyChanged = computed(() =>
       </p>
     </template>
   </div>
+  <p v-if="noChange" class="sqlNote">执行后所有表都没有变化</p>
   <p v-if="anyChanged" class="sqlNote legend">
     <span class="swatch" aria-hidden="true"></span>执行后变了的格子
   </p>
diff --git a/packages/contract/src/admin.ts b/packages/contract/src/admin.ts
index 4a6bc89..00d2f1b 100644
--- a/packages/contract/src/admin.ts
+++ b/packages/contract/src/admin.ts
@@ -819,6 +819,11 @@ export const sqlPreviewRequestSchema = z.object({
     .min(1)
     .max(1024 * 1024),
   mode: z.enum(["query", "modify"]),
+  /**
+   * 这组是不是题面上给学生看的那组（第 1 组）。增删改题只有这一组必须改到行 ——
+   * 其余组可以一行都不改，用来看学生会不会多改（比如 WHERE 写漏了）
+   */
+  shown: z.boolean().default(true),
 })
 
 export const generateSqlTestCaseRequestSchema = z.object({