fix(grid): copy text-like oracle blobs as decoded text

apps/desktop/src/composables/__tests__/useDataGridExport.spec.ts

@@ -2966,4 +2966,15 @@ describe("useDataGridExport MySQL BLOB 文本复制 (#12413)", () => {
 
     expect(extractDataGridSelection).toHaveBeenLastCalledWith(expect.objectContaining({ extractor: "raw", rows: [["0x616263"]] }));
   });
+
+  it("copies text-like Oracle-family blobs as text, matching the grid preview", async () => {
+    const matrix: CellSelectionMatrix = { rowIndexes: [0], columnIndexes: [1], columns: ["secret"], rows: [["0x616263"]] };
+    vi.mocked(extractDataGridSelection).mockResolvedValueOnce({ text: "abc", mimeType: "text/plain", fileExtension: "txt", rowCount: 1, columnCount: 1 });
+    const state = createExportState(blobTable, ["id", "secret"], matrix, [1, "0x616263"], undefined, undefined, [], DEFAULT_DATA_GRID_EXTRACTOR_OPTIONS, false, undefined, false, 1, 1, "oracle");
+
+    await expect(state.copyWithPreference("smart")).resolves.toBe(true);
+
+    expect(extractDataGridSelection).toHaveBeenCalledWith(expect.objectContaining({ extractor: "raw", rows: [["abc"]] }));
+    expect(copyToClipboard).toHaveBeenCalledWith("abc");
+  });
 });

apps/desktop/src/lib/dataGrid/binaryCellDownload.ts

@@ -291,13 +291,17 @@ export function binaryCellTextPreview(value: unknown, encoding: BinaryCellTextEn
 // VARBINARY，避免改变 MySQL BINARY/BLOB、SQL Server VARBINARY、PostgreSQL BYTEA、
 // Oracle RAW 等现有语义。
 export function binaryCellClipboardText(value: unknown, columnType?: string, databaseType?: DatabaseType): string | null {
-  // 覆盖上方注释里「严格限于 VARBINARY」的旧范围（#12413）：网格已经对文本型 MySQL
-  // BLOB 显示文本预览（AES_DECRYPT 这类表达式的结果列常报成 BLOB），显示 `secret`
-  // 却复制出 hex 与预览自相矛盾，因此 BLOB 家族并入同一闸门；严格往返校验与 hex
-  // 回退保持不变，MySQL BINARY、非 MySQL 的 blob/bytea 等现有语义不受影响。
+  // 覆盖上方注释里「严格限于 VARBINARY」的旧范围（#12413）：网格已经对文本型 BLOB
+  // 显示文本预览（MySQL 与 Oracle 家族；AES_DECRYPT 这类表达式的结果列常报成 BLOB），
+  // 显示 `secret` 却复制出 hex 与预览自相矛盾，因此并入同一闸门；严格往返校验与 hex
+  // 回退保持不变，MySQL BINARY、Oracle RAW、非预览库的 blob/bytea 等现有语义不受影响。
   const blobColumn = isBlobCellColumnType(columnType);
-  const decodableType = VARBINARY_TYPE_RE.test((columnType ?? "").trim()) || blobColumn;
-  if (databaseType !== "mysql" || !decodableType) return null;
+  // Blob columns follow the grid's inline text-preview gate: MySQL and the
+  // Oracle family preview text-like blobs as text, so copying hex from such a
+  // cell contradicts what the cell shows (#12413). MySQL VARBINARY keeps its
+  // #7471 contract; every other column stays lossless hex.
+  const decodableType = (databaseType === "mysql" && VARBINARY_TYPE_RE.test((columnType ?? "").trim())) || (blobColumn && isBlobTextPreviewDatabase(databaseType));
+  if (!decodableType) return null;
   // MySQL QueryResult 的 binary canonical form 是 `0x<hex>`；不要把普通的偶数长度
   // 文本（例如 "abcd"）猜测成 hex bytes。
   const bytes = typeof value === "string" ? parseBinaryCellHexValue(value) : null;

packages/app-tests/binaryCellDownload.test.ts

@@ -240,6 +240,15 @@ test("binaryCellClipboardText decodes textual MySQL varbinary and preserves arbi
   assert.equal(binaryCellClipboardText("0x616263", "BLOB", "mysql"), "abc");
   assert.equal(binaryCellClipboardText("0x616263", "LONGBLOB", "mysql"), "abc");
   assert.equal(binaryCellClipboardText("0xd6d0cec4", "LONGBLOB", "mysql"), null); // BLOB 不回退 GBK（与显示一致）
+  // Oracle 家族 BLOB 与内联显示预览共用同一闸门：文本型 BLOB 显示为文本，复制也必须
+  // 还原成同一份文本；只解严格 UTF-8（不回退 GBK），不可解码的 bytes 仍为 hex，
+  // 没有文本预览的库（如 sqlite）与 Oracle RAW 不受影响。
+  assert.equal(binaryCellClipboardText("0x616263", "BLOB", "oracle"), "abc");
+  assert.equal(binaryCellClipboardText("0x616263", "BLOB", "oceanbase-oracle"), "abc");
+  assert.equal(binaryCellClipboardText("0xd6d0cec4", "BLOB", "oracle"), null);
+  assert.equal(binaryCellClipboardText("0x00fffe", "BLOB", "oracle"), null);
+  assert.equal(binaryCellClipboardText("0x616263", "BLOB", "sqlite"), null);
+  assert.equal(binaryCellClipboardText("0x616263", "RAW", "oracle"), null);
   assert.equal(binaryCellClipboardText("0x616263", "BINARY(8)", "mysql"), null); // MySQL BINARY 不跟随
   assert.equal(binaryCellClipboardText("0x616263", "VARBINARY(128)", "sqlserver"), null); // SQL Server varbinary 不改
   assert.equal(binaryCellClipboardText("0x616263", "bytea", "postgres"), null); // Postgres bytea 不改