VbzCart/tables/ctg titles

About

• Purpose: Specifies which groups a SC title belongs to
• Future: Rename ID_Title field to ID_LCTitle, for disambiguation. Maybe ID_Group and ID_Source should be ID_SCGroup and ID_SCSource, for consistency.

Fields

• ID_Title: When the build process results in creating a new LC Title, this gets filled in with the Title's ID in order to prevent duplicates. If this field is NULL, then the Title is probably new, unless we have created LC Titles directly before entering them from the catalog. (Currently working out how to efficiently check for possible duplicates before creating new LC Titles.)
• Code: Still reconstructing what this is for.
• Descr: Still reconstructing what this is for. Documentation said "required if Code is used", but it is often NULL when Code is not NULL -- so changing that to "recommended if Code is used".

History

• 2016-02-04
  • Removing GroupSort -- I'm still figuring out how the former Group* fields are supposed to be used, and GroupSort is NULL in all existing records. If it's ever needed, document how it is supposed to work.
  • Renaming GroupCode and GroupDescr to Code and Descr to be consistent with naming in ctg_groups.

SQL

<mysql>CREATE TABLE `ctg_titles` (

 ID          INT NOT NULL AUTO_INCREMENT,
 ID_Title    INT DEFAULT NULL COMMENT "cat_titles.ID",
 ID_Group    INT DEFAULT NULL COMMENT "ctg_groups.ID",
 ID_Source  INT DEFAULT NULL COMMENT "ctg_sources.ID - source which enables this selection",
 WhenDiscont DATETIME DEFAULT NULL COMMENT "non-sourced discontinuation",
 Code   VARCHAR(7) DEFAULT NULL COMMENT "optional catalog code extension",
 Descr  VARCHAR(127) DEFAULT NULL COMMENT "description extension (recommended if Code is used)",
 isActive    BOOL DEFAULT FALSE COMMENT "this group-title membership is active?",
 Supp_CatNum VARCHAR(15) DEFAULT NULL COMMENT "catalog # for restock from supplier",
 Notes       VARCHAR(255) DEFAULT NULL COMMENT "notes about this particular title's availability in this group",
 PRIMARY KEY(`ID`)

) ENGINE = MYISAM;</mysql>