Stored Procedures& Operations Navigator

Week 10

SPL

SPL - Declarations

• SPL supports all data types available in the Create Table statement

• SPL does not support User Defined Types

• SPL does not support Arrays

Declare QtyToXfr Int Default 0;

Creates a variable called QtyToXfr as an integer and assigns 0 as the default value

SPL - Assignment

Set XfrQtyActual = 0;

• Test a local variable or parameter

If QtyToXfr is not Null then…

SPL – Data definition and Manipulation Statement

• Use SQL data definition and manipulation statements similar to embedded SQL.

• You don’t need to use Exec SQL and End-Exec.

• You don’t need to prefix variables with an ‘:’.

SPL – Conditional (Selection) Statements

• If statementsIf XfrPartId = 123 then

set QtyToXfr = 1;ElseIf XfrToRqs > 100 then

set QtyToXfr = 100;Else

set QtyToXfr = XfrQtyRqs;End if;

• The above statement has 3 possible conditions– If the part number = 123– If the XfrToRqs > 100– otherwise

SPL – Conditional (Selection) Statements

• Case StatementsCase PartId

When 123 thenSet QtrToXfr = 1;

When 234 then Set QtrToXfr = 10;

ElseSet QtyToXfr = XfrQtyRqs;

End Case;

• This statement has 3 conditions– If PartId = 123– If PartId = 234– otherwise

SPL – Conditional (Selection) Statements

• Case StatementsCase

When XfrPartId = 123 thenSet QtyToXfr = 1;

When XfrPartId = 234 thenSet QtyToXfr = 100;

ElseSet QtyToXfr = XfrQtyRqs;

End Case;

• This condition has 3 conditions– If XfrPartId = 123– If XfrpartId = 234– Otherwise

SPL – Loop Control Structures(Iteration)

• 4 loop structures– Loop

• infinite loop (use the Leave statement to exit)

– While • Test is at the beginning of the loop

– Repeat• Test is at the end of the loop

– For • Iterate over a set of rows

SPL – Loop Control Structures(Iteration)

• Loop

Read: Loop

If EOF = ‘Y’ then

Leave Read;

End If;

End Loop Read;

SPL – Loop Control Structures(Iteration)

• While

While (EOF = ‘N’) Do

End While;

SPL – Loop Control Structures(Iteration)

• Repeat

Repeat

Until (EOF = ‘Y’)

End Repeat;

SPL – Loop Control Structures(Iteration)

• For

For InvRow as InvCursor cursor for Select Qty

From InventoryWhere PartId = CurPartId

Do

End For;

• Builds a cursor full of data, reads a record from the cursor, process it, and then reads the next record. This loop continues until all the records in the cursor are processed.

Write a Stored Procedure that:

• Reads through ACTRANSPF and updates records as follows:– Trans Type BD – change to 500– Trans Type FD – increase by 5%– Trans Type LS – change to 40

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