Fix: 修复 SQL Server 修改默认值时报错 (#2190)

* Fix SQL Server default constraint DDL

* Polish SQL Server default display

---------

Co-authored-by: staff <staff@qimaos-MacBook-Pro.local>

apps/desktop/src/lib/__tests__/tableStructureEditorState.spec.ts

@@ -1,5 +1,5 @@
 import { describe, expect, it } from "vitest";
-import { combineDataTypeForDatabase, dataTypeLengthInputValue, isDataTypeLengthDisabled, splitDataType } from "../tableStructureEditorState";
+import { combineDataTypeForDatabase, createColumnDrafts, dataTypeLengthInputValue, isDataTypeLengthDisabled, splitDataType } from "../tableStructureEditorState";
 
 describe("tableStructureEditorState", () => {
   it("keeps mysql unsigned attributes in the editable base type", () => {
@@ -27,4 +27,47 @@ describe("tableStructureEditorState", () => {
     expect(dataTypeLengthInputValue("mysql", dataType)).toBe("");
     expect(dataTypeLengthInputValue("mysql", "set('manual','auto')")).toBe("");
   });
+
+  it("strips SQL Server metadata parentheses from editable defaults", () => {
+    const drafts = createColumnDrafts(
+      [
+        {
+          name: "name",
+          data_type: "nvarchar(100)",
+          is_nullable: true,
+          column_default: "('')",
+          is_primary_key: false,
+          extra: null,
+        },
+        {
+          name: "active",
+          data_type: "bit",
+          is_nullable: false,
+          column_default: "((1))",
+          is_primary_key: false,
+          extra: null,
+        },
+        {
+          name: "created_at",
+          data_type: "datetime2(7)",
+          is_nullable: false,
+          column_default: "((sysdatetime()))",
+          is_primary_key: false,
+          extra: null,
+        },
+        {
+          name: "label",
+          data_type: "nvarchar(100)",
+          is_nullable: true,
+          column_default: "('prefix (internal)')",
+          is_primary_key: false,
+          extra: null,
+        },
+      ],
+      "sqlserver",
+    );
+
+    expect(drafts.map((draft) => draft.defaultValue)).toEqual(["''", "1", "sysdatetime()", "'prefix (internal)'"]);
+    expect(drafts.map((draft) => draft.original?.column_default)).toEqual(["''", "1", "sysdatetime()", "'prefix (internal)'"]);
+  });
 });

apps/desktop/src/lib/tableStructureEditorState.ts

@@ -533,9 +533,58 @@ function stripPostgresStringDefaultCast(defaultValue: string, dataType: string):
   return match?.[1] ?? defaultValue;
 }
 
+function isWrappedByOuterParens(value: string): boolean {
+  if (value.length < 2 || value[0] !== "(" || value[value.length - 1] !== ")") return false;
+
+  let depth = 0;
+  let inString = false;
+  let inBracketIdentifier = false;
+  for (let index = 0; index < value.length; index += 1) {
+    const char = value[index];
+    if (inString) {
+      if (char === "'" && value[index + 1] === "'") {
+        index += 1;
+      } else if (char === "'") {
+        inString = false;
+      }
+      continue;
+    }
+    if (inBracketIdentifier) {
+      if (char === "]") inBracketIdentifier = false;
+      continue;
+    }
+    if (char === "'") {
+      inString = true;
+      continue;
+    }
+    if (char === "[") {
+      inBracketIdentifier = true;
+      continue;
+    }
+    if (char === "(") {
+      depth += 1;
+    } else if (char === ")") {
+      depth -= 1;
+      if (depth < 0) return false;
+      if (depth === 0 && index < value.length - 1) return false;
+    }
+  }
+  return depth === 0;
+}
+
+function stripSqlServerDefaultOuterParens(defaultValue: string): string {
+  let value = defaultValue.trim();
+  while (isWrappedByOuterParens(value)) {
+    value = value.slice(1, -1).trim();
+  }
+  return value;
+}
+
 function columnDefaultForEditor(column: ColumnInfo, databaseType?: DatabaseType): string {
   const defaultValue = column.column_default ?? "";
-  return databaseType === "postgres" ? stripPostgresStringDefaultCast(defaultValue, column.data_type) : defaultValue;
+  if (databaseType === "postgres") return stripPostgresStringDefaultCast(defaultValue, column.data_type);
+  if (databaseType === "sqlserver") return stripSqlServerDefaultOuterParens(defaultValue);
+  return defaultValue;
 }
 
 export function createColumnDrafts(columns: ColumnInfo[], databaseType?: DatabaseType): EditableStructureColumn[] {