Add \crosstabview

[jonbiemond]

🚀 Feature request

Add support for meta-command \crosstabview.
psql docs: https://www.postgresql.org/docs/9.6/app-psql.html#APP-PSQL-META-COMMANDS-CROSSTABVIEW

This feature is also requested here: dbcli/pgcli#1378
But since it's a meta-command, I supposed it should be implemented in this repo.

[pyhedgehog]

I'm not sure. In pg it can be implemented using crosstab() function. I recall something like that in Oracle (with completely different syntax of-cause). What about other RDBMS?