Viewing External Table Definitions: Quick Tip

Posted February 1, 2019 by James Knicely, Vertica Field Chief Technologist

An alternative to importing data into Vertica is to query it in place. For that we use external tables. Once an external table is created you can view its definition via the TABLES system table.

Example: dbadmin=> \! cat /home/dbadmin/ext.txt 1|TEST1 2|TEST2 dbadmin=> CREATE EXTERNAL TABLE ext (c1 INT, c2 VARCHAR(10)) AS COPY FROM '/home/dbadmin/ext.txt'; CREATE TABLE dbadmin=> SELECT * FROM ext; c1 | c2 ----+------- 1 | TEST1 2 | TEST2 (2 rows) dbadmin=> SELECT table_name, table_definition dbadmin-> FROM tables dbadmin-> WHERE table_name = 'ext'; table_name | table_definition ------------+----------------------------------- ext | COPY FROM '/home/dbadmin/ext.txt' (1 row) Helpful Links:

Have fun!