Question

尝试运行删除查询时，我遇到了一个奇怪的错误。

android.database.sqlite.SQLiteException: no such column: ITEMS_LINK (Sqlite code 1): , while compiling: DELETE FROM ITEMS_CONTENT_TABLE WHERE BASE_CATEGORY_NAME=? AND BASE_CATEGORY_SRC_PATH=?, (OS error - 2:No such file or directory)
W/System.err:     at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
W/System.err:     at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:910)
W/System.err:     at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:521)
W/System.err:     at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:603)
W/System.err:     at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:63)
W/System.err:     at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
W/System.err:     at android.database.sqlite.SQLiteDatabase.delete(SQLiteDatabase.java:1759)

但是可以注意到，删除查询中没有使用列ITEMS_LINK。

private boolean deleteChildContentFor(SQLiteDatabase db, String parentCategoryLink, String baseCategoryName, String baseCategorySrcPath)
{
    String columns[] = {ITEMS_LINK};
    String selection = PARENT_CATEGORY_LINK + "=? AND " + BASE_CATEGORY_NAME + "=? AND " + BASE_CATEGORY_SRC_PATH + "=?";
    String selectionArgs[] = {parentCategoryLink.trim(), baseCategoryName.trim(), baseCategorySrcPath.trim()};

    Cursor cursor = db.query(ITEMS_CONTENT_TABLE, columns, selection, selectionArgs, null, null, null);

    if (cursor != null && cursor.getCount() > 0) {
        cursor.moveToFirst();

        do {
            String itemsLink = cursor.getString(0);
            if (itemsLink != null && !itemsLink.isEmpty()) {
                deleteChildContentFor(db, itemsLink, baseCategoryName, baseCategorySrcPath);
            }
        } while (cursor.moveToNext());
    }

    if (cursor != null)
        cursor.close();

    String whereClause = PARENT_CATEGORY_LINK + "=? AND " + BASE_CATEGORY_NAME + "=? AND "
            + BASE_CATEGORY_SRC_PATH + "=?";
    String whereArgs[] = {parentCategoryLink.trim(), baseCategoryName.trim(), baseCategorySrcPath.trim()};
    db.delete(ITEMS_CONTENT_TABLE, whereClause, whereArgs);   // Where the error occurs.
}

我之前已经包含了一些语句，因为相同的db用于运行查询，其中提到了列db。（我认为值得一提的是，我也试图关闭数据库并获得另一个writableDatabase无效。

运行简单查询 在得到@MikeT的建议后，我尝试了一个简单的查询

String query = "DELETE FROM " + ITEMS_CONTENT_TABLE + " WHERE " + PARENT_CATEGORY_LINK + "='"
            + parentCategoryLink.trim() + "' AND " + BASE_CATEGORY_NAME + "='"
            + baseCategoryName.trim() + "' AND " + BASE_CATEGORY_SRC_PATH + "='" + baseCategorySrcPath.trim() + "';";

Log.d("Query", query);

db.execSQL(query);  //  Error on this line

记录的查询

D/Query: DELETE FROM ITEMS_CONTENT_TABLE WHERE PARENT_CATEGORY_LINK='_____' AND BASE_CATEGORY_NAME='_____' AND BASE_CATEGORY_SRC_PATH='_____';

这给出了大致相同的错误和堆栈跟踪，但现在PARENT_CATEGORY_LINK也包含在错误记录的查询中，这在以前是丢失的。

W/System.err: android.database.sqlite.SQLiteException: no such column: ITEMS_LINK (Sqlite code 1): , while compiling: DELETE FROM ITEMS_CONTENT_TABLE WHERE PARENT_CATEGORY_LINK='_______' AND BASE_CATEGORY_NAME='_______' AND BASE_CATEGORY_SRC_PATH='_______';, (OS error - 2:No such file or directory)
W/System.err:     at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
W/System.err:     at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:910)
W/System.err:     at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:521)
W/System.err:     at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:603)
W/System.err:     at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:63)
W/System.err:     at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
W/System.err:     at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1960)
W/System.err:     at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1885)

Answer 1

因为与@MikeT的讨论告诉我在问题中发布DB的Schema，所以刚刚找到了最奇怪的错误的原因。在这样做的过程中，我意识到有一些未注释的假设评论TRIGGER附加到ITEMS_CONTENT_TABLE。

我不会删除此问题，如果其他人遇到此问题，请发布此答案以提供帮助。

SQLite＆＃34;没有发现这样的列＆＃34;

1 个答案: