Newby Postgres questions

Howdy list members,

I'm new here and to Postgres.  I have 2 questions:

1.) Is there a list of the standard embedded SQL statements that Postgres
    recognizes?  I'm coming from an Ingres background, and I've already scanned
    over all of the docs.

2.) Does Postgres support dynamic embedded sql (such as sqlda)?  I want to
    dynamically construct SQL statements in my C code and have EGPC parse
    the embedded SQL that contains variables for what my SQL statement will
    be (at runtime, not compiletime).

Thanks,
stephen