如何在将数据从 CSV 文件加载到 Postgres Table 时删除尾随的白色 space？
How can I remove tailing white space while loading data from CSV file into an Postgres Table?
我想从 CSV 文件中删除尾随空格。
CSV 文件数据示例：(Delimitor=";")
X ;Y;Z
X1 ; Y1;Z1
X2;Y2; Z2
我会选择 SED 或 GREP 之类的东西，但文件很大，因此可能会因为预处理而影响性能.
我正在寻找一种仅在加载时删除这些空白的方法。
COPY 命令不支持预处理 - 你不能这样做 "at the time of loading "
https://www.postgresql.org/docs/current/static/sql-copy.html
In CSV format, all characters are significant. A quoted value
surrounded by white space, or any characters other than DELIMITER,
will include those characters. This can cause errors if you import
data from a system that pads CSV lines with white space out to some
fixed width. If such a situation arises you might need to preprocess
the CSV file to remove the trailing white space, before importing the
data into PostgreSQL.
我认为最好的解决方案是导入带空格的数据，然后
update t set attr = rtim(attr);
我想从 CSV 文件中删除尾随空格。
CSV 文件数据示例：(Delimitor=";")
X ;Y;Z
X1 ; Y1;Z1
X2;Y2; Z2
我会选择 SED 或 GREP 之类的东西，但文件很大，因此可能会因为预处理而影响性能.
我正在寻找一种仅在加载时删除这些空白的方法。
COPY 命令不支持预处理 - 你不能这样做 "at the time of loading "
https://www.postgresql.org/docs/current/static/sql-copy.html
In CSV format, all characters are significant. A quoted value surrounded by white space, or any characters other than DELIMITER, will include those characters. This can cause errors if you import data from a system that pads CSV lines with white space out to some fixed width. If such a situation arises you might need to preprocess the CSV file to remove the trailing white space, before importing the data into PostgreSQL.
我认为最好的解决方案是导入带空格的数据，然后
update t set attr = rtim(attr);