SQL Server/T-SQL Tutorial/System Functions/sp describe cursor — различия между версиями

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Текущая версия на 13:24, 26 мая 2010

Execute sp_describe_cursor into the cursor variable

   <source lang="sql">

22> IF cursor_status("variable", "@Report") != 1 5> CREATE TABLE authors( 6> au_id varchar(11), 7> au_lname varchar(40) NOT NULL, 8> au_fname varchar(20) NOT NULL, 9> phone char(12) NOT NULL DEFAULT ("UNKNOWN"), 10> address varchar(40) NULL, 11> city varchar(20) NULL, 12> state char(2) NULL, 13> zip char(5) NULL, 14> contract bit NOT NULL 15> ) 16> GO 1> insert authors values("1", "Joe", "Abra", "111 111-1111", "6 St.", "Berkeley", "CA", "11111", 1) 2> insert authors values("2", "Jack", "Majo", "222 222-2222", "3 St.", "Oakland" , "CA", "22222", 1) 3> insert authors values("3", "Pink", "Cherry", "333 333-3333", "5 Ln.", "Vancouver", "BC", "33333", 1) 4> insert authors values("4", "Blue", "Albert", "444 444-4444", "7 Av.", "Vancouver", "BC", "44444", 1) 5> insert authors values("5", "Red", "Anne", "555 555-5555", "6 Av.", "Regina", "SK", "55555", 1) 6> insert authors values("6", "Black", "Michel", "666 666-6666", "3 Pl.", "Regina", "SK", "66666", 1) 7> insert authors values("7", "White", "Sylvia", "777 777-7777", "1 Pl.", "Rockville", "MD", "77777", 1) 8> insert authors values("8", "Yellow","Heather","888 888-8888", "3 Pu", "Vacaville", "CA", "88888", 0) 9> insert authors values("9", "Gold", "Dep", "999 999-9999", "5 Av.", "Oakland", "CA", "99999", 0) 10> insert authors values("10", "Siler", "Dean", "000 000-0000", "4 Av.", "Oakland", "CA", "00000", 1) 11> GO 1> 2> 3> DECLARE authors_cursor CURSOR KEYSET FOR 4> SELECT au_lname 5> FROM authors 6> WHERE au_lname LIKE "S%" 7> 8> OPEN authors_cursor 9> 10> 11> 12> DECLARE @Report CURSOR 13> 14> 15> EXEC master.dbo.sp_describe_cursor 16> @cursor_return = @Report OUTPUT, 17> @cursor_source = "global", 18> @cursor_identity = "authors_cursor" 19> 20> 21> 22> IF cursor_status("variable", "@Report") != 1 23> PRINT "No information available from the cursor" 24> 25> ELSE BEGIN 26> 27> WHILE (@@fetch_status = 0) 28> BEGIN 29> FETCH NEXT FROM @Report 30> END 31> END 32> 33> 34> IF cursor_status("variable", "@Report") >= -1 35> BEGIN 36> CLOSE @Report 37> DEALLOCATE @Report 38> END 39> GO 1> 2> 3> CLOSE authors_cursor 4> DEALLOCATE authors_cursor 5> GO 1> 2> drop table authors; 3> GO</source>