Difference between revisions of "VbzCart/pieces/catalog/building"

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(→‎SQL - queries: SQL - queries - 2008: qryCtg_src_sub)
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   ) LEFT JOIN cat_ittyps AS it ON gi.ID_ItTyp = it.ID;</mysql>
 
   ) LEFT JOIN cat_ittyps AS it ON gi.ID_ItTyp = it.ID;</mysql>
 
<section end=sql />
 
<section end=sql />
 +
===qryCtg_src===
 +
<section begin=sql /><mysql>CREATE OR REPLACE VIEW qryCtg_src AS
 +
SELECT
 +
  b.*,
 +
  CONCAT_WS('-',b.ID_Title,b.CatSfx) AS IDS_Item,
 +
  CONCAT_WS('-',t.CatNum,b.CatSfx) AS CatNum,
 +
  IFNULL(ItOpt_Descr_part,NameSng) AS ItOpt_Descr
 +
FROM qryCtg_src_sub AS b LEFT JOIN qryCat_Titles AS t ON b.ID_Title=t.ID;</mysql>
 +
<section end=sql />
 +
 
==SQL - queries==
 
==SQL - queries==
 
These are from the MS Access 97 version, gradually being honed down for migration to MySQL
 
These are from the MS Access 97 version, gradually being honed down for migration to MySQL

Revision as of 17:45, 15 March 2008

Navigation

VbzCart: catalog building

Version

This is being revised yet again for the 2007 VbzCart-MySQL migration project; the previous version is here: VbzCart catalog building 2006.

Process

This is only a draft, as the process is still being worked out. Right now this process does not "recycle" junked records in cat_items; perhaps that was a bad idea to begin with, or perhaps some other use can be found for junked records that isn't part of catalog-building. There probably should be some process which removes junked records from use so they aren't taking up space and CPU cycles.

  1. Update the list of all catalog-based items ([calc Items Updates saved])
  2. For all items in [calc Items Updates saved] where ID_Item IS NULL, create new records in cat_items and update the corresponding records in [calc Items Updates saved]
  3. Fill in any blank ID_Item fields in [calc Items Updates saved] records:
    • #(Step 3) qryVb_Items_updates_index_new -- plugs the Item ID back into the calculated temp table. It assumes (1) 1:1 correspondence between Item IDs and catalog numbers, and (2) catalog numbers won't be changed during the course of a build (though they can change in general).
  4. Copy calculated item data over to [cat_items]:
  5. Final flag updates:
    • #(Step 5) qryVb_Items_update_final
      • Clear isInPrint flag for cat_items not found in calculated in-print listing
      • Set isForSale for cat_items with stock for sale
      • Update stock quantities for all cat_items
  6. Housekeeping: mark table as updated so cached tables get recalculated

SQL - queries - 2008

2008-03-15: Completely rewriting the building sequence again...

qryCtg_src_sub

<mysql>CREATE OR REPLACE VIEW qryCtg_src_sub AS SELECT

   NULLIF(CONCAT_WS('/',g.Code,gt.GroupCode,o.CatKey),) AS CatSfx,
   c.isCloseOut,
   gt.ID AS ID_CTG_Title,
   gi.ID AS ID_CTG_Item,
   gt.ID_Title,
   gi.ID_ItTyp,
   gi.ID_ItOpt,
   gi.ID_ShipCost,
   gi.PriceBuy,
   gi.PriceSell,
   gi.PriceList,
   IFNULL(gi.Descr,CONCAT_WS(' / ',gt.GroupDescr,o.Descr)) AS ItOpt_Descr_part,
   it.NameSng,
   gi.Descr AS GrpItmDescr,
   gt.GroupDescr AS TitleGroupDescr,
   o.Descr AS OptionDescr,
   CONCAT(g.Sort,it.Sort,o.Sort) AS ItOpt_Sort,
   gt.GroupCode AS GrpCode,
   gt.GroupDescr AS GrpDescr,
   gt.GroupSort AS GrpSort
 FROM
 (
   (
     (
       (
         qryCtg_Titles_active AS gt LEFT JOIN ctg_groups AS g ON g.ID=gt.ID_Group
        ) LEFT JOIN qryCtg_Sources_active AS c ON gt.ID_Source=c.ID
      ) LEFT JOIN ctg_items AS gi ON gi.ID_Group=g.ID
    ) LEFT JOIN cat_ioptns AS o ON gi.ID_ItOpt=o.ID
  ) LEFT JOIN cat_ittyps AS it ON gi.ID_ItTyp = it.ID;</mysql>

qryCtg_src

<mysql>CREATE OR REPLACE VIEW qryCtg_src AS SELECT

 b.*,
 CONCAT_WS('-',b.ID_Title,b.CatSfx) AS IDS_Item,
 CONCAT_WS('-',t.CatNum,b.CatSfx) AS CatNum,
 IFNULL(ItOpt_Descr_part,NameSng) AS ItOpt_Descr

FROM qryCtg_src_sub AS b LEFT JOIN qryCat_Titles AS t ON b.ID_Title=t.ID;</mysql>

SQL - queries

These are from the MS Access 97 version, gradually being honed down for migration to MySQL

(Step 1a) qryVb_Items_updates_new

<sql>SELECT c.* FROM qryCtg_Items_updates_joinable AS c LEFT JOIN ctg_updates AS s ON c.IDS_Item=s.IDS_Item WHERE s.IDS_Item IS NULL;</sql>

(Step 1) qryVb_Items_updates_append

<sql>INSERT INTO ctg_updates (

 ID_Item,
 IDS_Item,
 CatNum,
 CatSfx,
 ID_Title,
 ID_CTG_Group,
 ID_CTG_Title,
 ID_CTG_Item,
 ID_ItTyp,
 ID_ItOpt )

SELECT

 0 AS ID_Item,
 IDS_Item,
 CatNum,
 CatSfx,
 ID_Title,
 ID_TGroup,
 ID_TGTitle,
 ID_TGItem,
 ID_ItTyp,
 ID_ItOpt

FROM qryVb_Items_Updates_new; </sql>

(Step 2) qryVb_Items_results_append

This adds new cat_items rows for any calculated items not already cross-referenced. It doesn't cross-reference them, however. That is done by the next query. <sql>INSERT INTO cat_items (

 CatNum,
 isForSale,
 isMaster,
 isInPrint,
 isCloseOut,
 ID_ItTyp,
 ID_ItOpt,
 ItOpt_Descr,
 ItOpt_Sort,
 ID_ShipCost,
 PriceBuy,
 PriceSell,
 PriceList )

SELECT

 r.CatNum,
 r.isForSale,
 FALSE AS isMaster,
 r.isInPrint,
 r.isCloseOut,
 r.ID_ItTyp,
 r.ID_ItOpt,
 r.ItOpt_Descr,
 r.ItOpt_Sort,
 r.ID_ShipCost,
 r.PriceBuy,
 r.PriceSell,
 r.PriceList

FROM qryCtg_Items_updates AS r LEFT JOIN cat_items AS i ON r.ID_Item=i.ID WHERE i.ID IS NULL; </sql>

(Step 3) qryVb_Items_updates_index_new

This plugs the Item ID back into the calculated temp table. It assumes (1) 1:1 correspondence between Item IDs and catalog numbers, and (2) catalog numbers won't be changed during the course of a build (though they can change in general). <sql>UPDATE

 ctg_updates AS s LEFT JOIN
 cat_items AS i

ON i.CatNum=s.CatNum SET

 s.ID_Item = i.ID,
 isForSale = FALSE,
 isInPrint = FALSE

WHERE

 s.ID_Item IS NULL;

</sql>

(Step 4) qryVb_Items_results_update

<sql>UPDATE

 qryCtg_build AS r LEFT JOIN
 cat_items AS i

ON

 r.ID_Item=i.ID

SET

 i.CatNum = r.CatNum,
 i.isForSale = r.isForSale,
 i.isInPrint = r.isInPrint,
 i.isCloseOut = r.isCloseOut,
 i.isPulled = FALSE,
 i.isDumped = FALSE,
 i.ID_ItTyp = r.ID_ItTyp,
 i.ID_ItOpt = r.ID_ItOpt,
 i.ItOpt_Descr = iif(r.ItOpt_Descr IS NULL,i.ItOpt_Descr,r.ItOpt_Descr), 
 i.ItOpt_Sort = r.ItOpt_Sort,
 i.ID_ShipCost = r.ID_ShipCost,
 i.PriceBuy = r.PriceBuy,
 i.PriceSell = r.PriceSell,
 i.PriceList = r.PriceList,
 i.GrpCode = r.GrpCode,
 i.GrpDescr = r.GrpDescr,
 i.GrpSort = r.GrpSort,
 i.CatSfx = r.CatSfx

WHERE r.ID_Item IS NOT NULL; </sql>

Changes:

  • Must clear isPulled and isDumped, in case pulled items are returned to service

(Step 5) qryVb_Items_update_final

  • Clear isInPrint flag for cat_items not found in calculated in-print listing
  • Set isForSale for cat_items with stock for sale
  • Update stock quantities for all cat_items

<sql>UPDATE

 (cat_items AS i LEFT JOIN qryCtg_build AS r ON r.ID_Item=i.ID)
 LEFT JOIN v_stk_items_remaining AS s ON s.ID_Item=i.ID

SET

 i.isInPrint = nz(r.isInPrint),
 i.isCloseOut = nz(r.isCloseOut),
 i.isForSale = nz(r.isInPrint)
     OR nz(r.isCloseOut)
     OR (nz(s.QtyForSale) > 0),
 i.qtyInStock = nz(s.QtyForSale);

</sql>

(Step 6) qryVb_Items_mark_updated

<sql>UPDATE

 data_tables

SET WhenUpdated=Now() WHERE Name="cat_items"</sql>