处理columnSpecs为null的情况 #15
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在处理类似于
这种语句时,email这一行只有列名和类型,没有额外的约束,会导致代码中col.columnSpecs为null,抛出空指针异常,可以通过添加默认值的方式解决。
不过这种方式生成的puml文件也是没有默认值的(下面的email行),我不确定要不要把defaultValue初始化为“NULL”,不知道符不符合所有SQL语言的默认行为