Обсуждение: name vs varchar vs text?
reading through the curent development docs, I've run accross a data type called "name", and it looks very similar to varchar or text, and I'm wondering if there is any atvantage to useing this data type over varchar or even text?
"mike" <mike@quadrent.net> writes: > reading through the curent development docs, I've run accross a data type called "name", and it looks very similar to varcharor text, and I'm wondering if there is any atvantage to useing this data type over varchar or even text? The NAME type is used to hold table and column names. It is a fixed length char field of length NAMEDATALEN in postgres_ext.h (default 32). If you happen to want a field which has a fixed size of 32 characters, you can use NAME. Or you can use CHAR(32). NAME is actually slightly different from CHAR(32), in that no length is stored with a NAME field. That probably makes NAME a bit more efficient. I don't know why a length is stored with a fixed length CHAR field, but it is. Ian