ARGUMENTS:
Arg [a] Number of bytes in keydata
Arg [b] Number of bytes in the index layer of the leaf header
Arg [c] Number of columns in index search key structure
Arg [d] Number of columns in the index layer fo the leaf header
FUNCTIONALITY:
Kernel Data layer Index
索引问题，找到对应索引，重建，再验证表结构：ANALYZE TABLE xxxxx VALIDATE STRUCTURE CASCADE;
5 ora-00600 [25027] [7] [a] [b]
arg[a] Tablespace Number表空间号
arg[b] 十进制的相对数据块号Relative Data Block Address (RDBA)
表或者索引有问题，重建对应的表或者索引；
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