As for compression/decompression, no data is lost. Right?
PS: How does the archive detect if the depository is compressed? Is it a status item?
What happened was that I first compressed (deleted my data), so I decompressed. Then I deleted the “data” table. I put dismount/mount, but cps did not appear, only read-only.
When the compression ends successfully, a record will be added in the LOG_DATA table in the archive DB that it has been compressed. When mounting the depository, it is determined whether there is a record. If so, it is compressed => it goes to the cdata and data0 tables.
If you decompressed (moved data from “cdata” to “data” table) and then erase the “data” table, you have an empty depository 