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sap abap parallel cursor method in nested loop
What is the difference between Sy index and Sy Tabix?
Sy-tabix vs Sy-index
Sy-tabix is used to find the current line in the internal table; it’s a current line index. Whereas sy-index in used to find the number of current pass in the loop statement.
What is the difference between loop and read in SAP ABAP?
LOOP: looop will read each and evry record in the inetrnal table. READ : statement will read only single record at at time and not more than that. Read statement will return Sy-subrc value. its always suggest to check the sy-subrc after the read statement.
How many types of internal tables are there?
There are three types of internal table. They are – Standard Tables, Sorted Tables, and Hashed Tables. – It has an internal linear index.
What is clear in SAP ABAP?
All rows in an internal table are deleted. This frees up the memory space required for the table, except for the initial memory requirement (see INITIAL SIZE). The statement FREE is used to release the memory space occupied by the rows of internal tables.
What is the use of describe table in SAP ABAP?
The statement DESCRIBE is used to determine the attributes of data objects of elementary data types. When DESCRIBE is used for structures or data objects of deep data types like strings, internal tables, or reference variables, only elementary attributes can be determined.
What is the use of open cursor in SAP ABAP?
OPEN CURSOR – ABAP Keyword Documentation. [abap_options]. The ABAP SQL statement OPEN CURSOR opens a database cursor for the result set of the main query defined after FOR and links a cursor variable dbcur with this database cursor. The results set of the main query can be read with the statement FETCH.
What is open cursor in SAP?
An open cursor is linked to a multiple-line selection in the database table. To read the data into a target area in the ABAP program, use the following: FETCH NEXT CURSOR c INTO target. This writes one line of the selection into the target area target, and the cursor moves one line further in the selection set.
What is open cursor and close cursor?
You must open a cursor before you can use it to read, write, or delete data: ## open cursor cursor_name [for readonly] When you open a cursor, it is positioned before the first row; the first retrieve cursor statement you issue advances the cursor to the first row and return its data.
What is the difference between cursor and select statement?
CURSOR is mainly used to extract data in segments or chunks from the DB table. Conversely for the SELECT statement and its variants, data is directly copied into a data object in the ABAP memory.
What is database cursor in ABAP?
A cursor is a database object which is used to manipulate data in a set of row by row. We can say that a cursor is a set of rows with a pointer and this pointer actually points to the current row.
What is parallel cursor in ABAP?
Parallel cursor is the technique to increase the perforamance of the program. For example if we use nested select in our program instead of For all entries addition, then definetly performance going down. In the same way the if we use nested loops in the program it will also leads to down the performance.
How do you implement a parallel cursor?
In Parallel Cursor, we first sort both inner and outer loop tables by the same key field and try to see if there is any entry in the second table inside the LOOP construct of the first table. We use READ .. WITH KEY .. BINARY SEARCH to check if an entry exists in the second table.
What is the use of open cursor in SAP ABAP?
OPEN CURSOR – ABAP Keyword Documentation. [abap_options]. The ABAP SQL statement OPEN CURSOR opens a database cursor for the result set of the main query defined after FOR and links a cursor variable dbcur with this database cursor. The results set of the main query can be read with the statement FETCH.
What is the use of at new in SAP ABAP?
AT NEW is triggered when a field left to control level changes. ON CHANGE OF is not triggered when a field left to control level changes. Values in the fields to the right of control level contains asterisks and zeros. Values in the fields to the right of control level contains original values.
What is parallel cursor technique?
Parallel cursor is the technique to increase the perforamance of the program. For example if we use nested select in our program instead of For all entries addition, then definetly performance going down. In the same way the if we use nested loops in the program it will also leads to down the performance.
What is the use of at new in SAP ABAP?
AT NEW is triggered when a field left to control level changes. ON CHANGE OF is not triggered when a field left to control level changes. Values in the fields to the right of control level contains asterisks and zeros. Values in the fields to the right of control level contains original values.
What is the purpose of at new statement?
Within the Loop command, AT NEW statement detects when the VBAP structure has a different VBELN (document number) then the previous one.
What is the use of AT END OF in SAP ABAP?
->at the end of the internal table (at end, at last). Control Level Statements , that helps in reducing the lines of code. Also the Internal Table is to be ‘Sorted’ before using the Control Level Statements.
What is the purpose of at first and at last?
AT FIRST triggers at the first loop iteration whereas AT LAST triggers at the last loop iteration. We can’t mention any particular field here as we can do in AT NEW or AT END OF. The main purpose of this control break is to write some header or footer information.
What is the difference between at new and on change of in SAP ABAP?
When we use At new for a field, it will trigger whenever there is any change in al lthe fields from the left to that of the particular field. But when we use On change of it triggers only when there is any change in the particular field. At new can only be used inside loop. On change of can used outside the loop.
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