问题
When running the below query:
WITH sublevels AS (
SELECT 1 UNION ALL
SELECT 1 UNION ALL
SELECT 1), FIELDA AS (SELECT (ROW_NUMBER() OVER ())::INT sublevel
FROM sublevels sl1, sublevels sl2, sublevels sl3)
SELECT TOP 10
FIELDB,
sublevel, REPLACE(REGEXP_REPLACE(REGEXP_SUBSTR(UPPER(FIELDC), 'FROM \\S+', 1, sublevel), 'FROM ', ''),')','') ALIASA
FROM TABLEA
JOIN FIELDA ON sublevel <= REGEXP_COUNT(UPPER(FIELDC), 'FROM ')
WHERE ALIASA != 'ABC'
AND lower(split_part(ALIASA, '.', 2)) IN (
SELECT DISTINCT lower(t.table_name)
FROM information_schema.tables t
INNER JOIN information_schema.columns c on c.table_name = t.table_name AND c.table_schema = t.table_schema
WHERE lower(column_name) similar TO '%(aaa|bbb|ccc)%')
I am getting the following error:
ERROR: 0A000: Specified types or functions (one per INFO message) not supported on Redshift tables.
I have no idea why, if I run the queries individually they work fine:
Query1
WITH sublevels AS (
SELECT 1 UNION ALL
SELECT 1 UNION ALL
SELECT 1), FIELDA AS (SELECT (ROW_NUMBER() OVER ())::INT sublevel
FROM sublevels sl1, sublevels sl2, sublevels sl3)
SELECT TOP 10
FIELDB,
sublevel, REPLACE(REGEXP_REPLACE(REGEXP_SUBSTR(UPPER(FIELDC), 'FROM \\S+', 1, sublevel), 'FROM ', ''),')','') ALIASA
FROM TABLEA
JOIN FIELDA ON sublevel <= REGEXP_COUNT(UPPER(FIELDC), 'FROM ')
WHERE ALIASA != 'ABC'
Query2
SELECT DISTINCT lower(t.table_name)
FROM information_schema.tables t
INNER JOIN information_schema.columns c on c.table_name = t.table_name AND c.table_schema = t.table_schema
WHERE lower(column_name) similar TO '%(aaa|bbb|ccc)%'
回答1:
In Redshift:
- queries against information_schema run on the leader node only
- queries against any "normal" tables run on compute nodes only
You cannot mix and match 1. and 2.
来源：https://stackoverflow.com/questions/57326426/amazon-redshift-error-error-0a000-specified-types-or-functions-one-per-info