Wildcards in table mapping - excluding `_`

Question

I want to exclude several tables (Aurora Postgres) from DMS replication. All the tables I want to exclude have suffixes `__f` or `__b`. Where `_` is special char for DMS table mappings. I try to use regex as : 
- `%#_#_b`
- `%[_][_]b`

**None of the above is working for me.**

Example of my mapping rule:
>     {
>            "object-locator": {
>                "schema-name": "%",
>                "table-name": "%[_][_]b"
>            },
>            "rule-action": "exclude",
>            "rule-id": "1",
>            "rule-name": "exclude_b",
>            "rule-type": "selection"
>  },

Answer

Hi, I am afraid that '%' is greedy here: it eats all characters up to the end including the suffixes that you are looking for.

So, you may want to try something like `_______[_][_]b` with _______ matching the exact number of chars of 1 of your tables with suffix _b to exclude to confirm the greedyness of %.

If confirmed, you can create such an exclusion rule for all possible name lengths of your use case. Yes, I know that it it not elegant but at least it's a workaround.   In parallel, I would open a ticket with AWS Support to see if they have a better solution or can fix the greedyness of %.

Best,

Didier

Wildcards in table mapping - excluding `_`

Relevant content