fix: ALTER TABLE DROP COLUMN only modifies schema, demo page deep-copies query results to prevent reference sharing

2026-07-29 22:28:47 +08:00
parent e778d1feae
commit 29f8fd52a1
10 changed files with 48 additions and 36 deletions
@@ -5667,15 +5667,8 @@ class QueryExecutor {
            if (!schema.columns[stmt.column.name]) {
                throw new DatabaseError(`Column "${stmt.column.name}" does not exist in table "${stmt.name}"`, 'COLUMN_NOT_FOUND');
            }
-            // 从 schema 引用上删除列定义（保留所有行数据）
+            // 只从 schema 引用上删除列定义，不碰行数据（避免引用共享导致查询结果被篡改）
            delete schema.columns[stmt.column.name];
-            // 清除已有行中该列的值（MemoryEngine 的 find 返回引用，delete 直接生效）
-            const rows = await this.engine.find(stmt.name, { table: stmt.name });
-            const colName = stmt.column.name;
-            for (const row of rows) {
-                if (colName in row)
-                    delete row[colName];
-            }
        }
    }
    async executeTruncateTable(stmt) {