Fixed a bug in the Oracle driver of the gf framework where lowercase table names were not supported. #4312
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…Filter function caused lowercase table names to become unsupported.
…Filter function caused lowercase table names to become unsupported.
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背景：在Oracle中，双引号用于标识区分大小写的标识符，包括表名。当表名用双引号括起来时，Oracle会保留其大小写，否则，Oracle会将标识符转换为大写
问题：oracle_do_filter.go文件DoFilter函数中newSql, err = gregex.ReplaceString(""", "", newSql)会将sql语句中“”全部删除，导致无法支持表名为小写的表。
解决：删除newSql, err = gregex.ReplaceString(""", "", newSql)