VbzCart/docs/pieces/catalog/building: Difference between revisions

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==Navigation==
[[VbzCart]]: [[VbzCart catalog building|catalog building]]
==Version==
==Version==
This is being revised yet again for the 2007 VbzCart-MySQL migration project; the previous version is here: [[vbzwiki:VbzCart catalog building 2006|VbzCart catalog building 2006]].
This is a tricky process which has been revised multiple times.
==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.
# Update the list of all catalog-based items ([calc Items Updates saved])
#* [[#(Step 1) qryVb_Items_updates_append]] -- Add any new items to [calc Items Updates saved]
#** [[#(Step 1a) qryVb_Items_updates_new]] -- in-print items that are new
#*** [[#(Step 1aa) qryVb_Items_updates]] -- all the items currently available from suppliers (in print)
#** [[#(Step 1b) qryVb_Items_updates_copy_fields]]
# 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]
#* [[#(Step 2) qryVb_Items_results_append]] -- 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.
#** [[#(Step 2a) qryVb_Items_results]]
# 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).
# Copy calculated item data over to [cat_items]:
#* [[#(Step 4) qryVb_Items_results_update]]
# 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
# Housekeeping: mark table as updated so cached tables get recalculated
#* [[#(Step 6) qryVb_Items_mark_updated]]


==SQL==
* {{l/sub|2017}} version - 2016 code apparently never really got finished, and the Items table needs some flag changes
These are from the MS Access 97 version.
* {{l/sub|2016}} version - webified version of 2010, with rules finally documented
===qryCatNum_Depts===
* '''2010''' version: see {{l/vbzcart/code|maint/build-cat.php}}
<sql>SELECT
* {{l/sub|2009}} version - SQL statements executed directly from PHP code
  d.ID,
* {{l/sub|2008}} version - started in 2007 - a set of stored queries called from a stored procedure
  d.name,
* {{l/sub|2006}} version
  d.sort,
  d.CatKey,
  ID_Supplier,
  s.CatKey&iif(d.CatKey IS NULL,"","-"&d.CatKey) AS CatNum,
  d.CatKey AS DeptCatKey
FROM Depts AS d LEFT JOIN Suppliers AS s ON d.ID_Supplier=s.ID;</sql>


===qryCatNum_Titles===
It's interesting to note that I originally thought of SCM Groups as groups ''of Titles'' -- an explanation from the [[VbzCart/tables]] page on 2008-02-17 (and only removed on 2016-02-01) says:
v_titles has much the same information, but depends on _titles and so may not be up-to-date.
<blockquote>The key concept here is "catalog title groups" (CTGs). A CTG is a set of titles which are all available with the same set of options (e.g. sizes) at the same prices (e.g. $10 S, $11 M-XL, $12 2XL). The final vbz catalog (cat_items) is the result of a sort of vector multiplication of Titles (cat_titles) and CTGs plus any items in stock.
<sql>SELECT
</blockquote>
  t.ID,
This conceptualization no longer works, as a SCM Title may have one or more SCM Groups -- e.g. if it has a set of standard sizes (like S-3X) but is also available in super-large sizes (4X+).
  t.Name,
  d.CatNum&"-"&t.CatKey AS CatNum,
  d.DeptCatKey,
  t.CatKey AS TitleCatKey,
  ID_Dept,
  d.ID_Supplier
FROM
  Titles AS t
  LEFT JOIN qryCatNum_Depts AS d
    ON t.ID_dept=d.ID</sql>
 
===(Step 1aa) qryVb_Items_updates===
<sql>SELECT
  BuildOption(g.Code,gt.GroupCode,o.CatKey) AS CatSfx,
  t.ID&CatSfx AS IDS_Update,
  t.CatNum&CatSfx AS CatNum,
  t.ID AS ID_Title,
  g.ID AS ID_TGroup,
  gt.ID AS ID_TGTitle,
  gi.ID AS ID_TGItem,
  gi.ID_ItemType AS ID_ItTyp,
  gi.ID_Option AS ID_ItOpt
FROM
( ( ( ( qryCatNum_Titles AS t
        LEFT JOIN [TGroup Titles] AS gt
          ON gt.ID_Title=t.ID
      )
      LEFT JOIN TGroups AS g
        ON g.ID=gt.ID_TGroup
    )
    LEFT JOIN qryCatalogs_Active AS c
      ON gt.ID_Catalog=c.ID
  )
  LEFT JOIN [TGroup Items] AS gi
    ON gi.ID_TGroup=g.ID
)
LEFT JOIN Options AS o
  ON gi.ID_Option=o.ID
WHERE
  (c.ID IS NOT NULL)
  AND g.Active
  AND gt.Active
  AND ((gt.WhenDiscont IS NULL) OR (gt.WhenDiscont>Now))
  AND gi.Active;</sql>
 
===(Step 1a) qryVb_Items_updates_new===
<sql>SELECT c.*
  FROM qryVb_Items_Updates AS c
  LEFT JOIN [calc Item Updates saved] AS s
    ON c.IDS_Update=s.IDS_Update
    WHERE s.IDS_Update IS NULL;</sql>
 
===(Step 1) qryVb_Items_updates_append===
<sql>INSERT INTO [calc Item Updates saved] (
  ID_Item,
  IDS_Update,
  ID_Title,
  ID_TGroup,
  ID_TGTitle,
  ID_TGItem,
  ID_ItTyp,
  ID_ItOpt )
SELECT
  NULL,
  IDS_Update,
  ID_Title,
  ID_TGroup,
  ID_TGTitle,
  ID_TGItem,
  ID_ItTyp,
  ID_ItOpt
FROM qryVb_Items_Updates_new;</sql>
===(Step 1b) qryVb_Items_updates_copy_fields===
<sql>UPDATE
  [calc Item Updates saved] AS s
  LEFT JOIN qryVb_Items_updates AS u
    ON s.IDS_Update=u.IDS_Update
  SET
    s.ID_ItTyp = u.ID_ItTyp,
    s.ID_ItOpt = u.ID_ItOpt;</sql>
===(Step 2a) qryVb_Items_results===
<sql>SELECT
  s.ID_Item,
  s.CatNum,
  (
    tg.Active AND
    (
      (tgt.WhenDiscont Is Null)
    OR
      (tgt.WhenDiscont>Now())
    )
  AND tgt.Active AND tgi.Active AND (c.ID_Supercede Is Null)
  ) AS isForSale,
  isForSale AND NOT c.isCloseOut AS isInPrint,
  c.isCloseOut,
  s.ID_Title,
  tgi.ID_ItemType AS ID_ItTyp,
  tgi.ID_Option AS ID_ItOpt,
  tgi.ID_ShipCode AS ID_ShipCost,
  tgi.PriceBuy*100 AS PriceBuy,
  tgi.PriceSell*100 AS PriceSell,
  tgi.PriceList*100 AS PriceList,
  IIF(tgi.Descr Is Null,OptionJoin(tgt.GroupDescr,o.Descr," / "),tgi.Descr) AS ItOpt_Descr,
  s.CatSfx,
  tg.TitleSort & it.Sort & o.Sort AS ItOpt_Sort
FROM
( ( ( ( ( [calc Item Updates saved] AS s
          LEFT JOIN TGroups AS tg
            ON s.ID_TGroup = tg.ID
        ) LEFT JOIN [TGroup Titles] AS tgt
            ON s.ID_TGTitle = tgt.ID
      ) LEFT JOIN [TGroup Items] AS tgi
          ON s.ID_TGItem = tgi.ID
    ) LEFT JOIN [Supplier Catalogs] AS c
        ON tgt.ID_Catalog = c.ID
  ) LEFT JOIN Options AS o
      ON tgi.ID_Option = o.ID
) LEFT JOIN [Item Types] AS it
    ON tgi.ID_ItemType = it.ID;</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
  qryVb_Items_Results 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
  [calc Item Updates saved] AS s
  LEFT JOIN cat_items AS i
    ON i.CatNum=s.CatNum
  SET s.ID_Item = i.ID
  WHERE s.ID_Item IS NULL;</sql>
 
===(Step 4) qryVb_Items_results_update===
<sql>UPDATE
  qryVb_Items_Results 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
  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 qryVb_Items_Results 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 (s.QtyForSale > 0),
    i.qtyInStock = s.QtyForSale;</sql>
===(Step 6) qryVb_Items_mark_updated===
<sql>UPDATE
  data_tables
SET WhenUpdated=Now()
WHERE Name="cat_items"</sql>

Latest revision as of 01:53, 25 February 2024

Version

This is a tricky process which has been revised multiple times.

  • 2017 version - 2016 code apparently never really got finished, and the Items table needs some flag changes
  • 2016 version - webified version of 2010, with rules finally documented
  • 2010 version: see Template:L/vbzcart/code
  • 2009 version - SQL statements executed directly from PHP code
  • 2008 version - started in 2007 - a set of stored queries called from a stored procedure
  • 2006 version

It's interesting to note that I originally thought of SCM Groups as groups of Titles -- an explanation from the VbzCart/tables page on 2008-02-17 (and only removed on 2016-02-01) says:

The key concept here is "catalog title groups" (CTGs). A CTG is a set of titles which are all available with the same set of options (e.g. sizes) at the same prices (e.g. $10 S, $11 M-XL, $12 2XL). The final vbz catalog (cat_items) is the result of a sort of vector multiplication of Titles (cat_titles) and CTGs plus any items in stock.

This conceptualization no longer works, as a SCM Title may have one or more SCM Groups -- e.g. if it has a set of standard sizes (like S-3X) but is also available in super-large sizes (4X+).

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