VbzCart/tables/stk history
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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
- ID_Event: where known, this is the ID of the corresponding event in event_log
- This is a sort of first step towards making this log part of the unified event log.
- WhoSystem: is optional and possibly redundant, but seems to be useful for marking imported/migrated records.
Future:
- Rename QtyBefore and QtyAfter to QtyLineBefore and QtyLineAfter.
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.
- 2010-12-01 Added ID_Event field -- working towards including this in unified event logging
- 2014-05-26 Made fields DEFAULT NULL instead of NOT NULL so we don't have to know all of them before the event is started: ID_StkLine, ID_OthCont, ID_OthLine, IDS_OthCont
- Left these as NOT NULL: ID_StkBin, CH_OthType -- Bins must be explicitly created by an administrator, and we should always know what type of container the Other is.
- 2014-06-26 Lengthened What from 63 chars to 255 because descriptions were being cut off.
- 2016-02-24 Apparently I never changed the actual DB; this time, lengthened What from 63 chars to TEXT.
- 2016-03-03
- No NULL values found in ID_StkLine (or in legacy data), so changing it to NOT NULL.
- Setting additional NOT NULL fields to DEFAULT NULL in order to accommodate stk_history_legacy data: QtyBefore, QtyBinBefore
- I decided it was better to tolerate incomplete event-record data than to risk losing the record altogether when an event-write attempt doesn't include all the required fields, since there's currently no guarantee that a failed write will generate an alert anywhere.
- Officially changing engine to INNODB. Migrated data from stk_history_legacy and then (what is now) `stk_history OLD 2`.
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).
SQL
CREATE TABLE `stk_history` (
`ID` INT NOT NULL AUTO_INCREMENT,
`ID_Event` INT DEFAULT NULL COMMENT "ID of corresponding event in unified log",
`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 DEFAULT NULL COMMENT "[container type's table].ID of the Other place",
`ID_OthLine` INT DEFAULT NULL COMMENT "[container type's line table].ID of of the Other place",
`IDS_OthCont` VARCHAR(31) DEFAULT NULL COMMENT "container.IDS of the Other place",
`ID_Item` INT NOT NULL COMMENT "cat_items.ID of item being moved",
`QtyBefore` INT DEFAULT 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 NULL COMMENT "quantity remaining in this stock line after the move",
`QtyBinBefore` INT DEFAULT NULL COMMENT "quantity of this ID_Item in the current bin before the move",
`QtyBinAfter` INT DEFAULT NULL 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` TEXT DEFAULT NULL COMMENT "automatic, succinct 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) NOT NULL COMMENT "network name or IP address of client machine",
`Notes` TINYTEXT COMMENT "optional human-added explanatory notes",
PRIMARY KEY(`ID`)
) ENGINE = INNODB;
Migration
The following was used to migrate records from what is now "stk_history OLD 2":
INSERT INTO stk_history_new (
ID_Event,
ID_StkBin,
ID_StkLine,
CH_OthType,
ID_OthCont,
ID_OthLine,
IDS_OthCont,
ID_Item,
QtyBefore,
QtyAdded,
QtyAfter,
QtyBinBefore,
QtyBinAfter,
WhenStarted,
WhenFinished,
What,
WhoAdmin,
WhoSystem,
WhoNetwork,
Notes
)
SELECT
ID_Event,
ID_StkBin,
ID_StkLine,
CH_OthType,
ID_OthCont,
ID_OthLine,
IDS_OthCont,
ID_Item,
QtyBefore,
QtyAdded,
QtyAfter,
QtyBinBefore,
QtyBinAfter,
WhenStarted,
WhenFinished,
What,
WhoAdmin,
'from old stk_history',
WhoNetwork,
Notes
FROM stk_history
There were no errors or warnings.