pigstorage有第二个构造函数，它接受多个选项，其中一个是-schema。根据文档，创建一个隐藏文件.pig\u schema，其中包含您的模式，并在加载数据时从中加载您的模式。更多细节在这里https://pig.apache.org/docs/r0.10.0/api/org/apache/pig/builtin/pigstorage.html
以下是步骤：您需要做的第一件事是手动创建模式

// Load data by specifying schema
A = LOAD 'data' USING PigStorage(',') AS (name:chararray, amount:float);
// Now store data in with -schema option to create schema
STORE A INTO 'output' USING PigStorage(',', '-schema');
// above statement will create .pig_schema file in "output" directory. copy this file to your source directory 'data'
Now load data without specifying Schema

A_WITHOUT_SCHEMA = LOAD 'data' USING PigStorage(',');

// view the schema of relation by issuing describe statement.
DESCRIBE A_WITHOUT_SCHEMA;

// The output should be something like 
{name: chararray, amount: float}

我希望这能澄清问题的解决办法。