Re: CREATE TABLE AS standard?
От | Bruce Momjian |
---|---|
Тема | Re: CREATE TABLE AS standard? |
Дата | |
Msg-id | 200005011549.LAA19207@candle.pha.pa.us обсуждение исходный текст |
Ответ на | Re: CREATE TABLE AS standard? (Thomas Lockhart <lockhart@alumni.caltech.edu>) |
Список | pgsql-hackers |
> > I know I use that version my self a lot more than the SELECT INTO > > version. We probably got it 'free' from the CREATE VIEW semantics, > > as Tom suggested. I tend to use it to 'materialize' a new table when > > I'm altering schema (either denormalizing, or normalizing) and need to > > convert the type of a column. It's a little handier than separate CREATE > > TABLE and INSERT INTO statements, although it's semantically equivalent. > > I implemented CREATE TABLE AS as a semantically clearer version of > SELECT/INTO, which was (afaik) in the original Postgres95 and probably > earlier. > > They are equivalent. btw, I assume that Tom used the term "abuse" in > the supportive sense of the word? :) > I covered SELECT...INTO in my book, with a short paragraph showing CREATE TABLE...AS is equivalent. Which one should I use in my book as the preferred? -- Bruce Momjian | http://www.op.net/~candle pgman@candle.pha.pa.us | (610) 853-3000+ If your life is a hard drive, | 830 Blythe Avenue + Christ can be your backup. | Drexel Hill, Pennsylvania19026
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