The future The initial release will see read-only cursors, but we're looking into extending that down the road with updateable cursors. Immediately I want to state the obvious, that this will have similar restrictions to the RequestLive property in TnxQuery: not all sql statements can be upda...
The direction clause can be any of the variants allowed in the SQL FETCH command. Omitting direction is the same as specifying NEXT. direction values that require moving backward are likely to fail unless the cursor was declared or opened with the SCROLL option. Examples: MOVE curs1; MOVE LAS...
The direction clause can be any of the variants allowed in the SQL FETCH command. Omitting direction is the same as specifying NEXT. direction values that require moving backward are likely to fail unless the cursor was declared or opened with the SCROLL option. Examples: MOVE curs1; MOVE LAS...
A cursor references a result set. The REF CURSOR allows you to pass a cursor reference from one PL/SQL program unit to another. In other words, it allows you to create a variable that will receive a cursor and enable access to its result set,but in this blog I am giving examples for...
Examples The following example processes data in a cursor. DECLARE MyCursor CURSOR FOR SELECT * FROM Table1 AS T1 INNER JOIN Table2 AS T2 ON T1.Col1 = T2.Col1; OPEN MyCursor; DECLARE @VarCursor1 VARCHAR(20); FETCH NEXT FROM MyCursor INTO @VarCursor1; WHIL...
All access to cursors in PL/pgSQL is performed through cursor variables, which are always of the refcursor data type. Examples Declare a Cursor The following table includes the DECLARE..CURSOR options that are Transact-SQL extended syntax have no equivalent in P...
Language –Language used to create a function to describe the cursor in PostgreSQL. Cursors actions in PostgreSQL We are using employee and customer tables to describe examples. Code: CREATE TABLE Employee ( emp_id INT NOT NULL, emp_name character(10) NOT NULL, emp_address character(20) NOT...
Cursors differ fromkeyset paginationandLIMIT/OFFSETin that: Each cursor is a stateful SQL object that is referred to by a unique name. Each cursor requires holding open its own dedicated (read-only)transaction. Each cursor operates on a snapshot of the database at the moment that cursor is ...
SQL Server Cursor – Examples Let’s now take a look at two cursor examples. While they are pretty simple, they nicely explain how cursors work. In the first example, we want to get all cities ids and names, together with their related country names. We’ll use the PRINT command to ...
Embedded SQL Control flow Errors & diagnostics Cursors PL/pgSQL to PL/vSQL migration guide Parameter modes Executing stored procedures Altering stored procedures Stored procedures: use cases & examples User-defined extensions Developing user-defined extensions (UDxs) Hadoop integration ...