Using interval as a column name with :: results in ParseError

[Bilbottom]

Details (bug)

First off -- I love this library! It's super helpful 😄

What I've found looks like a bug, but it looks like it's because of an unquoted reserved keyword being used in the SQL that's being parsed.

The following SQL results in a ParseError after passing it to the sqlglot.parse function:

SELECT interval::INTEGER AS minute_interval
FROM staging.tracker

Here's a snippet of the error -- the sqlglot version used is 17.14.2 (latest):

Despite a reserved keyword being used, this is still valid SQL and the SQL will run correctly against the database (in this case, duckdb) so this is a false-positive error.

Additional Details

This is NOT an issue when, either:

• The interval column is quoted
• The CAST function is used instead of the :: syntax

Note that this also seems to only be the case for this special keyword -- I tried some others, like date, and they have all worked fine.

Here's an MWE to reproduce this error (and show that the other cases work fine):

import sqlglot  # 17.14.2

SQL_OK_1 = """\
SELECT CAST(interval AS INTEGER) AS time_interval
FROM staging.tracker
"""

SQL_OK_2 = """\
SELECT "interval"::INTEGER AS time_interval
FROM staging.tracker
"""

SQL_OK_3 = """\
SELECT date::DATE AS tracker_date
FROM staging.tracker
"""

SQL_ERROR = """\
SELECT interval::INTEGER AS time_interval
FROM staging.tracker
"""

# All fine
print(sqlglot.parse(SQL_OK_1, read="duckdb"))
print(sqlglot.parse(SQL_OK_2, read="duckdb"))
print(sqlglot.parse(SQL_OK_3, read="duckdb"))

# No likey
print(sqlglot.parse(SQL_ERROR, read="duckdb"))