USE [DocumedisLogs]
GO

/*
MDDOC-878

Purge of the table documedisLogs.dbo.Documedis_VaccinationCheck_LogData

Only records that are more than 7 months old and present as archived in [archivedRowsJournal]
will be purged.

Deletion is made in small batches to avoid locking.
*/
CREATE PROCEDURE [purge_Documedis_VaccinationCheck_LogData] AS
BEGIN
    DECLARE @cutoff DATE = DATEADD(MONTH, -7, CURRENT_TIMESTAMP);
    DECLARE @batch INT = 5000;
    DECLARE @row_count INT = 1
    DECLARE @tbl_to_del TABLE (DocumedisVaccinationCheckLogData_PK BIGINT NOT NULL );
    
    WHILE @row_count > 0 BEGIN
        TRUNCATE TABLE @tbl_to_del;
        
        -- region populate filter table
        INSERT INTO @tbl_to_del([DocumedisVaccinationCheckLogData_PK])
        SELECT TOP (@batch)
               [s].[DocumedisVaccinationCheckLogData_PK]
        FROM [dbo].[Documedis_VaccinationCheck_LogData] [s]
        WHERE [s].[LogDateTime] > @cutoff
          AND EXISTS(
            SELECT 1
            FROM [archivedRowsJournal] [a]
            WHERE [a].[tableName] = 'Documedis_VaccinationCheck_LogData'
              AND [a].[tableRowId] = [s].[DocumedisVaccinationCheckLogData_PK]
        );
        
        SELECT @row_count = COUNT(1)
        FROM @tbl_to_del;
        -- endregion
        
        -- region Documedis_VaccinationCheck_LogData
        DELETE [d]
        FROM @tbl_to_del d
            INNER JOIN [Documedis_VaccinationCheck_LogData] s ON [s].[DocumedisVaccinationCheckLogData_PK] = [d].[DocumedisVaccinationCheckLogData_PK];
        -- endregion
        
        -- region archivedRowsJournal
        DELETE j
        FROM [archivedRowsJournal] j
            INNER JOIN @tbl_to_del d ON [j].[tableRowId] = [d].[DocumedisVaccinationCheckLogData_PK]
        WHERE [j].[tableName]='Documedis_VaccinationCheck_LogData';
        -- endregion
        
    END
END