i want some advice about ideas for gsoc. i don't konw if it is appropriate that i send a email here, so if you feel uncomfortable, please accept my apology.
1.release8.2 make COPY TO can copy the output of an arbitrary SELECT statement. so i think maybe COPY FROM can get data from output and 'insert into' some column that designated. the format of the command will be discussed.
2.this come from TODO list: COPY always behaviors like a unit of work thar consists of some insert commands, if any error, it rollback. but sometimes we only care the data should be inserted. in that situation, i used to use "try....catch...." insert row by row to skip the error, because it will take much time to examine every row. so: Allow COPY to report error lines and continue. this is a good idea.
3.sometimes, i want to copy data from one database to another. i think using COPY will simple the code. i want the content from COPY TO not store in the file, but in the memory, and i can COPY FROM the memory(i don't kown COPY with STDIN and STDOUT can do this or not.).
