Re: executeQuery
От | Fernando Nasser |
---|---|
Тема | Re: executeQuery |
Дата | |
Msg-id | [email protected] обсуждение исходный текст |
Ответ на | executeQuery ("Lufkin, Brad" <[email protected]>) |
Список | pgsql-jdbc |
Lufkin, Brad wrote: > I'm executing an SQL query using the following code: > > Connection connection = > DriverManager.getConnection(url,user,password); > Statement statement = connection.createStatement(); > ResultSet resultSet = statement.executeQuery("SELECT * FROM > someTable"); > > This works except that the third statement doesn't return until the query is > complete. This contrasts with the behavior of other databases (such as > Informix) where the query returns immediately, thus allowing the result set > metadata to be analyzed before the result set is. > Is there any way to force the executeQuery to return immediately? > If not, is there some way to limit the results of the query to the first n > rows, where n is some reasonable number? > You can either use LIMIT <n> in the SELECT statement itself or use the setFetchSize() inside a transaction or with server-side prepared statements. -- Fernando Nasser Red Hat Canada Ltd. E-Mail: [email protected] 2323 Yonge Street, Suite #300 Toronto, Ontario M4P 2C9
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