July 25, 2023 #Query Manager, #SQL, #Development 10 minute read

Advanced Query Manager Development in SAP Business One

The Query Manager is a powerful tool in SAP Business One for creating complex queries and reports. This guide covers advanced techniques and best practices for Query Manager development.

1. Query Manager Architecture

Understanding the Query Manager's architecture is crucial for advanced development:

-- Basic Query Manager Structure
CREATE PROCEDURE CustomQueryManager
AS
BEGIN
    -- Parameter Declarations
    DECLARE @StartDate DATE
    DECLARE @EndDate DATE
    DECLARE @BusinessPartner VARCHAR(50)
    
    -- Query Logic
    SELECT 
        T0.DocEntry,
        T0.DocNum,
        T0.CardCode,
        T0.DocDate,
        T1.ItemCode,
        T1.Quantity,
        T1.Price,
        T1.LineTotal
    FROM ORDR T0 
    INNER JOIN RDR1 T1 ON T0.DocEntry = T1.DocEntry
    WHERE T0.DocDate BETWEEN @StartDate AND @EndDate
    AND (@BusinessPartner IS NULL OR T0.CardCode = @BusinessPartner)
END

2. Advanced Query Techniques

Implement advanced query features for better performance:

-- Advanced Query with Multiple Joins and Aggregations
WITH SalesData AS (
    SELECT 
        T0.DocEntry,
        T0.DocDate,
        T1.ItemCode,
        T1.Quantity,
        T1.LineTotal,
        ROW_NUMBER() OVER (PARTITION BY T0.CardCode 
                          ORDER BY T0.DocDate DESC) as RowNum
    FROM ORDR T0 
    INNER JOIN RDR1 T1 ON T0.DocEntry = T1.DocEntry
    WHERE T0.DocDate >= DATEADD(MONTH, -3, GETDATE())
),
ItemStats AS (
    SELECT 
        ItemCode,
        SUM(Quantity) as TotalQty,
        SUM(LineTotal) as TotalAmount,
        COUNT(DISTINCT DocEntry) as OrderCount
    FROM SalesData
    WHERE RowNum <= 10
    GROUP BY ItemCode
)
SELECT 
    I.ItemCode,
    T0.ItemName,
    I.TotalQty,
    I.TotalAmount,
    I.OrderCount,
    T0.AvgPrice
FROM ItemStats I
INNER JOIN OITM T0 ON I.ItemCode = T0.ItemCode
ORDER BY I.TotalAmount DESC

3. Parameter Management

Implement effective parameter handling:

CREATE PROCEDURE CustomQueryWithParameters
    @StartDate DATE,
    @EndDate DATE,
    @ItemGroup VARCHAR(20) = NULL,
    @Warehouse VARCHAR(8) = NULL
AS
BEGIN
    SET NOCOUNT ON;
    
    -- Parameter Validation
    IF @StartDate > @EndDate
        THROW 50000, 'Start date cannot be later than end date', 1;
        
    -- Dynamic SQL Construction
    DECLARE @SQL NVARCHAR(MAX)
    DECLARE @Params NVARCHAR(MAX)
    
    SET @SQL = N'
        SELECT 
            T0.ItemCode,
            T0.ItemName,
            T1.WhsCode,
            T1.OnHand,
            T1.IsCommited,
            T1.OnOrder
        FROM OITM T0
        INNER JOIN OITW T1 ON T0.ItemCode = T1.ItemCode
        WHERE 1=1'
        
    IF @ItemGroup IS NOT NULL
        SET @SQL = @SQL + N' AND T0.ItmsGrpCod = @ItemGroup'
        
    IF @Warehouse IS NOT NULL
        SET @SQL = @SQL + N' AND T1.WhsCode = @Warehouse'
        
    SET @Params = N'@ItemGroup VARCHAR(20), @Warehouse VARCHAR(8)'
    
    EXEC sp_executesql @SQL, @Params, 
                      @ItemGroup, @Warehouse
END

4. Performance Optimization

Optimize query performance with these techniques:

-- Optimized Query with Hints and Indexes
SELECT /*+ RECOMPILE */
    T0.DocEntry,
    T0.DocNum,
    T0.CardCode,
    T1.ItemCode,
    T1.Quantity
FROM ORDR T0 WITH (INDEX(PK_ORDR))
INNER JOIN RDR1 T1 WITH (INDEX(PK_RDR1))
    ON T0.DocEntry = T1.DocEntry
WHERE T0.DocDate >= DATEADD(MONTH, -1, GETDATE())
OPTION (OPTIMIZE FOR UNKNOWN)

-- Create Supporting Indexes
CREATE NONCLUSTERED INDEX IX_ORDR_DocDate
ON ORDR (DocDate)
INCLUDE (DocEntry, DocNum, CardCode)

CREATE NONCLUSTERED INDEX IX_RDR1_DocEntry
ON RDR1 (DocEntry)
INCLUDE (ItemCode, Quantity)

5. Best Practices

Follow these best practices for Query Manager development:

• Use appropriate indexing strategies
• Implement proper error handling
• Use parameter sniffing prevention when needed
• Optimize for specific use cases
• Implement proper security measures
• Use appropriate transaction management

Thanks,

Ahmed Aboalia