Your code fragment would work like this: DECLARE iterator float4 : 1 - we can init at declaration. Correct syntax for loops in PL/pgSQL in the manual. About the assignment operator in plpgsql: The forgotten assignment operator '' and the commonplace ':'. Other changes add apostrophes at right places.Python Dictionaries Access Items Change Items Add Items Remove Items Loop Dictionaries Copy Dictionaries Nested Dictionaries Dictionary Methods Dictionary Exercise Python If.Else Python While Loops Python For Loops Python Functions Python Lambda Python Arrays Python Classes/Objects Python Inheritance Python Iterators Python Polymorphism Python Scope Python Modules Python Dates Python Math Python JSON Python RegEx Python PIP Python Try. To increment a variable in plpgsql: iterator : iterator + 1 There is no ++ operator. Quotename is needed if you ever use special characters Instead of fetching twice, I rather set up no-exit loopįetch next from Tests into And then, if no row is fetched, exit the loop fast_forward enables some speed optimizationsĭeclare Tests cursor local fast_forward for ![]() Here is my function: create function foo () returns trigger as declare xyz cursor for select id from accounts begin LOOP if NEW. Hence, you cannot use the special syntax WHERE CURRENT OFcursor. The problem is in the LOOP statement, console spit out the error: CONTEXT: SQL statement in PL/PgSQL function 'foo' near line 7 LINE 1: move forward 1 from 1. Cursors are not visible inside the command. local means the cursor name is private to this code EXECUTE is not a 'clause', but a PL/pgSQL command to execute SQL strings. ![]() All table names are prefixed with "TestData". to by step loop statements end loop label If we analyse the above syntax: An integer variable. The cursor FOR LOOP statement implicitly declares its loop index as a record variable of the row type that a specified cursor returns, and then opens a. The syntax of the for loop statement to iterate over a range of integers: <<label> for loopcnt in reverse from.For loop to iterate over a range of integers. ![]() The columns occur in a variety of tables within the database. The different uses of the for loop in PostgreSQL are described below: 1. The script is designed to rename columns whose names match a pattern, in this case with a "pct" prefix. alertmesgrpad(INVAR1,20)rpad(INVAR2,20) END LOOP DBMSSQL. As a proof of concept, I am trying to simply iterate over the table, and set the value of the resid column to 1.0 in every row. prev in thread next in thread List: postgresql-sql Subject: SQL CURSOR EXAMPLE. The cursor FOR LOOP implicitly creates its loop index as a record variable with the row type in which the cursor returns and then opens the cursor. PL/PGSQL: Store the result of a loop in a table. A nice feature of the cursor FOR LOOP statement is that it allows you to fetch every row from a cursor without manually managing the execution cycle i.e., OPEN, FETCH, and CLOSE. Oracle stored procedure - Loop within cursor. Print sp_executeSQL next from Tests into Tests I then average the values of these points (this average is known as a residual), and add this value to the table in the resid column. Postgresql plpgsql stored procedure update statement in loop. Set = N'exec sp_rename ' + + N',' + + '_Pct' + N', column' SELECT COLUMN_NAME FROM INFORMATION_SCHEMA.COLUMNS WHERE COLUMN_NAME LIKE 'pct%' AND TABLE_NAME LIKE 'TestData%' How do I pass the table name to the rename sp ? I'm not sure how to do that since the column names are in one of many tables. What is wrong and how do I fix it ? I tried wrapping the column name in brackets, and double quotes "" like some of the search results suggested. Msg 15248, Level 11, State 1, Procedure sp_rename, Line 213Įither the parameter is ambiguous or the claimed (COLUMN) is wrong. But I would try to avoid all of these constructions, most of the time you dont need them to get your stuff done. ![]() You could use a recursive CTE or generateseries(), but I dont think that would be faster than a loop/cursor. The following example uses the continue statement in an unconditional loop to print out the odd numbers from 1 to 10: do declare counter int 0 begin loop counter counter + 1 - exit the loop if counter > 10 exit when counter > 10 - skip the current iteration if counter is an even number continue. I assume you want to actually return values. Cursor behaviour in SQL Server and PostgreSQL is very different. In pgAdmin, those would be output in the 'Messages' pane, not in the 'Data Output' pane. When I try to run the following SQL snippet inside a cursor loop, set = N'exec sp_rename ' + + N',' + '_Pct' + N',''COLUMN''' First of all, your function does not return anything, you just produce notices.
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