update readme

[universalmind303]

closes #2394
I think this is a pretty comprehensive list.

I'd suggest reviewers to doublecheck just in case I accidentally marked some of them as supported that are not (or vice-versa).

[scsmithr]

Ship!

[tychoish]

I love this.

changes made

[vrongmeal]

We don’t support writes for:

1. Snowflake
2. BigQuery
3. Clickhouse

AND

Any of the file formats (in form of INSERT queries)

We do however support COPY TO for:

1. CSV
2. Newline Delimited JSON
3. Parquet
4. BSON

[universalmind303]

We do however support COPY TO for:
CSV
Newline Delimited JSON
Parquet
BSON

@vrongmeal

do you think we should add separate columns for insert/copy? I wanted to keep the table from getting too cluttered

[scsmithr]

We do however support COPY TO for:
CSV
Newline Delimited JSON
Parquet
BSON

@vrongmeal

do you think we should add separate columns for insert/copy? I wanted to keep the table from getting too cluttered

We could do asterisk, then have a "* COPY TO only" or something

[universalmind303]

@vrongmeal @scsmithr I made a change that addresses the copy/insert that i think is a bit cleaner.

[tychoish]

I'm surprised that we support inserts for persisted data in the apache arrow format, which seems worth double checking.

Because (I believe) all of the COPY TO - only supported formats also support globbing, you can get append-only modifications to existing tables by just adding new files that match the glob. I don't think this is expressible on this page, but it's not nothing.

stale