PostgreSQL Documentation 16 43 7 Cursors
OPEN unbound cursorvar NO SCROLL FOR query The cursor variable is opened and given the specified query to execute The cursor cannot be open already and it must have been declared as an unbound cursor variable that is as a simple refcursor variable The query must be a SELECT or something else that returns rows such as EXPLAIN The query is treated in the same way as other SQL
Dynamically generated CURSOR in Postgresql Stack Overflow, It is loop over implicit internal cursor for dynamic SQL FOR db rec IN EXECUTE v sql dynamic LOOP END LOOP Little bit more complex solution is described in documentation OPEN FOR EXECUTE do declare r refcursor rec record begin open r for execute select from pg class fetch next from r into rec while found loop raise notice
Sql Calling a function that returns a refcursor Stack Overflow
Calling a function that returns a refcursor I am using Postgresql 8 3 and have the following simple function that will return a refcursor to the client CREATE OR REPLACE FUNCTION function 1 RETURNS refcursor AS DECLARE ref cursor REFCURSOR BEGIN OPEN ref cursor FOR SELECT FROM some table RETURN ref cursor END LANGUAGE plpgsql
Postgresql How to use a Function Parameter in a Cursor that s , Created this Postgres Function which is working fine but the actual requirement is to pass the input parameter in the function to the Cursor which uses the dynamic SQL as follows The below is the Function
Plpgsql the cursor for loop in postgresql Stack Overflow
Plpgsql the cursor for loop in postgresql Stack Overflow, Now i have to rewrite this same procedure in pl pgsql PostgreSQL to achieve similar functionality Please help me and send that pl pgsql function PARENT C CURSOR FOR SELECT parent folder key FROM folder WHERE folder key new parent folder key BEGIN IF folder key new parent folder key THEN RAISE EXCEPTION ILLEGAL CYCLE END IF
Sql Server Cursor Attributes Create Example Vrogue
Postgresql dynamic cursor for record in EXECUTE field access
Postgresql dynamic cursor for record in EXECUTE field access Suppose the block below do declare v table name text table name v column name text column name v record record v sql dynamic text v enum xml xml v
PostgreSQL Precios Funciones Y Opiniones GetApp Colombia 2021
Cursor name The name of the cursor to be opened This can be an SQL identifier or a host variable value A value to be bound to a placeholder in the cursor This can be an SQL constant a host variable or a host variable with indicator descriptor name The name of a descriptor containing values to be bound to the placeholders in the cursor PostgreSQL Documentation 16 OPEN. However ECPG the embedded SQL preprocessor for PostgreSQL supports the standard SQL cursor conventions including those involving DECLARE and OPEN statements The server data structure underlying an open cursor is called a portal Portal names are exposed in the client protocol a client can fetch rows directly from an open portal if it PL pgSQL Cursors PL pgSQL supports the use of cursors to retrieve and manipulate result sets from SQL queries in PostgreSQL database Cursors are particularly useful when you need to work with large result sets or when you want to process rows one by one within a PL pgSQL function or procedure Declaring a Cursor You declare a cursor
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