I finally figured it out as follows:1. modified the corresponding data type of the columns to the csv file2. if null values existed, defined the data type to varchar. The null values cause problem too.
so 1100 culumns work well now. This problem wasted me three days. I have lots of csv data to COPY.
pgsql-general by date:
Соглашаюсь с условиями обработки персональных данных