运行以下查询时：
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 = …