feature(athena): add SHOW

[theborch]

Parse the following Athena statements as SHOW:

SHOW COLUMNS
SHOW CREATE TABLE
SHOW CREATE VIEW
SHOW DATABASES
SHOW PARTITIONS
SHOW TABLES
SHOW TBLPROPERTIES
SHOW VIEWS

Example:

from sqlglot import parse_one

parse_one("show create table db.table;", dialect="athena")

Output:

Show(
  this=CREATE TABLE,
  target=Identifier(this=table, quoted=False),
  db=Identifier(this=db, quoted=False))

Notes:

1. if a regular expression is used in SHOW TABLES it needs to be prefixed with LIKE
   • this is valid athena syntax, despite missing from the current AWS docs.
2. SHOW TBLPROPERTIES does not currently parse the optional ('property_name').

[georgesittas]

Ηι @theborch, can you please fix the build?

[georgesittas]

@theborch, please open a new PR that only inludes changes related to the SHOW syntax. There's too much going on here and it's hard to review.

[georgesittas]

Please revert all the changes to this file, they're unrelated to the PR and it's not clear why they were made.

[georgesittas]

Again, please avoid making changes like these. It makes reviewing PRs harder. Stylistic changes need to be discussed with the core team first and, if accepted, reviewed separately.

[georgesittas]

Why were these added? This pattern is inconsistent with the rest of the codebase.

[georgesittas]

debug?