VbzCart/tables/stk history

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[edit] About

• Purpose: log of all stock movement
• Refers to: qryStock_containers, cat_items
• Rules:
  • Stock items must always be moved to or from a stock line. (The source/destination can be either another stock line or a line from a package or received restock.)
  • The sign of QtyAdded indicates whether the movement was to or from.
• Fields:
  • CH_OthType: appropriate type code -- see qryStock_containers for codes
  • IDS_OthCont: type code plus separator (period) plus ID unique to that type
• History:
  • 2008-12-26 Changed field names, added new fields:
    • QtyFound → QtyBefore – quantity in this stock line before moving
    • QtyDone → QtyAdded – quantity added to this stock line
    • QtyLeft → QtyAfter – quantity in this stock line after moving
    • + QtyTotBefore – total of item in this bin before move)
    • + QtyTotAfter – total of item in this bin after move)
  • 2008-12-27 More field name changes, to show grouping of local ("stock") and external ("other") locations:
    • ID_Stock → ID_StkLine
    • ID_Bin → ID_StkBin
    • ID_Cont → ID_OthCont
    • ID_Line → ID_OthLine
  • 2008-12-29 Final revisions to match what I ended up with in Access for the migration:
    • +CH_OthType
    • +ID_OthCont
    • Created stk_history_legacy to handle legacy data properly; turned on all NOT NULLs
  • 2009-12-20 Added fields WhoAdmin, WhoSystem, WhoNetwork
  • 2009-12-22 Renamed When -> WhenStarted; added WhenFinished; QtyAfter and QtyBinAfter can now be NULL so we can record them when the event is complete.
• Notes:
  • The IDS_Line* fields are somewhat redundant, but I decided that redundancy was a goal: one of the purposes of history data (including stk_history) is to help reconstruct what happened when something goes wrong. Maintenance of the _stk_containers table is also somewhat redundant, but should make displaying meaningful history reports quicker (i.e. it's basically a sort of cache, as are all the _* tables).

[edit] SQL

DROP TABLE IF EXISTS `stk_history`;
 
CREATE TABLE `stk_history` (
  `ID`           INT         NOT NULL AUTO_INCREMENT,
  `ID_StkBin`    INT         NOT NULL COMMENT "stock item is being moved to or from this bin",
  `ID_StkLine`   INT         NOT NULL COMMENT "stk_items.ID of item in this bin being moved",
  `CH_OthType`   CHAR        NOT NULL COMMENT "type for 'other' container & line",
  `ID_OthCont`   INT         NOT NULL COMMENT "[container type's table].ID of the Other place",
  `ID_OthLine`   INT         NOT NULL COMMENT "[container type's line table].ID of of the Other place",
  `IDS_OthCont`  VARCHAR(31) NOT NULL COMMENT "container.IDS of the Other place",
  `ID_Item`      INT         NOT NULL COMMENT "cat_items.ID of item being moved",
  `QtyBefore`    INT         NOT NULL COMMENT "quantity found in this stock line before the move",
  `QtyAdded`     INT         NOT NULL COMMENT "quantity moved (Qty fields at targ/dest may change value later)",
  `QtyAfter`     INT          DEFAULT COMMENT "quantity remaining in this stock line after the move",
  `QtyBinBefore` INT         NOT NULL COMMENT "quantity of this ID_Item in the current bin before the move",
  `QtyBinAfter`  INT          DEFAULT COMMENT "quantity of this ID_Item in the current bin after the move",
  `WhenStarted`  DATETIME         NOT NULL COMMENT "when the move was started",
  `WhenFinished` DATETIME     DEFAULT NULL COMMENT "when the move was completed",
  `What`         VARCHAR(63)  DEFAULT NULL COMMENT "brief automatic description of operation",
  `WhoAdmin`     VARCHAR(127)     NOT NULL COMMENT "VbzCart admin username",
  `WhoSystem`    VARCHAR(127) DEFAULT NULL COMMENT "who logged into the operating system, if using non-web client app",
  `WhoNetwork`   VARCHAR(64)          COMMENT "network name or IP address of client machine",
  `Notes`        TINYTEXT             COMMENT "optional human-added explanatory notes",
  PRIMARY KEY(`ID`)
) ENGINE = MYISAM;