Bug fix: 提升MySQL 统计信息表的Decimal数据类型的精度 || Bug fix: Improve the precision of the Decimal data type of the MySQL statistics table

[ycw66]

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将MySQL 统计信息表的Decimal数据类型的精度从10调整到30

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Adjust the precision of the Decimal data type of the MySQL statistics table from 10 to 30

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