PostgreSQL:外部 table 和丢弃的记录

PostgreSQL: foreign table and discarded records

PostgreSQL 在哪里存储在 select 期间从外部 table 丢弃的记录?我有以下 table:

CREATE FOREIGN TABLE ext.alternatenamesext (
  altid BIGINT,
  geoid BIGINT,
  isolanguage VARCHAR(7),
  alternatename TEXT,
  ispreferredname INTEGER,
  isshortname INTEGER,
  iscolloquial INTEGER,
  ishistoric INTEGER
) 
SERVER edrive_server
OPTIONS (
  delimiter E'\t',
  encoding 'UTF-8',
  filename '/mnt/storage/edrive/data/alternateNames.txt',
  format 'csv');

alternateNames.txt 包含约 1100 万条记录。但是当我 "SELECT * FROM ext.alternatenamesext" 它 returns 只有 ~950 万条记录。剩下的200万在哪里?有没有办法把它们放到单独的文件中,就像 Oracle 的 sql*ldr?

问题已通过以下语法 CREATE FOREIGN TABLE...:[=​​11=] 解决

CREATE FOREIGN TABLE ext.alternatenamesext (
  altid BIGINT,
  geoid BIGINT,
  isolanguage VARCHAR(7),
  alternatename VARCHAR(400),
  isPreferredName INT,
  isShortName INT,
  isColloquial INT,
  isHistoric INT
)
SERVER edrive_server
OPTIONS (
  delimiter E'\t',
  encoding 'UTF-8',
  filename '/mnt/storage/edrive/data/alternateNames.txt',
  format 'text',  -- not 'csv'!
  null '');  -- eliminate null values (some kind of TRAILING NULLCOLLS in Oracle I guess)