[Bug] When trino queries a table containing a decimal field, the metadata of that field is converted to a string

[v-kkhuang]

异常背景

使用trino查询包含decimal字段的表时，该字段元数据会被转换为string。

重现步骤

1.用户查询语句：select * from leebai_ind.test_alltype_null 2.查看openFile接口返回的元数据：发现decimal类型变为string

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Abnormal background

When using trino to query a table containing a decimal field, the metadata of that field is converted to a string.

Repro steps

1. User query statement: select * from leebai Ind. test Alltype_ Null
2. View the metadata returned by the openFile interface: found that the decimal type has changed to string

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