Inventory tables

Inventory Tables
MTL_PARAMETERS:

It maintains a set of default options like general ledger accounts; locator, lot, and serial controls; inter–organization options; costing method; etc. for each organization defined in Oracle Inventory.

Each organization’s item master organization (MASTER_ORGANIZATION_ID) and costing organization (COST_ORGANIZATION_ID) are maintained here. You specify which manufacturing calendar the organization will use (CALENDAR_CODE), as well as the set of exceptions to this calendar (CALENDAR_EXCEPTION_SET_ID).

NEGATIVE_INV_RECEIPT_CODE indicates whether this organization will allow negative balances in inventory. It is used in the transaction system to ensure, for example, that you do not over–issue a particular item (if you have indicated that negative balances are not allowed). For lot number and serial number auto–generation, you can specify whether you want the numbers generated from defaults defined at the organization level or the item level (LOT_NUMBER_GENERATION,

SERIAL_NUMBER_GENERATION). You can also specify uniqueness constraints for lot numbers (LOT_NUMBER_UNIQUENESS) and serial numbers (SERIAL_NUMBER_TYPE). Among the accounting defaults that can be defined here are valuation accounts, receiving accounts, profit and loss accounts, and inter– organization transfer accounts.


MTL_SYSTEM_ITEMS:

This is the definition table for items. This table holds the definitions for inventory items, engineering items, and purchasing items. You can specify item–related information in fields such as: Bill of Material, Costing, Purchasing, Receiving, Inventory, Physical attributes, General Planning, MPS/MRP Planning, Lead times, Work in Process, Order Management, and Invoicing. You can set up the item with multiple segments, since it is implemented as a flex field. Use the standard ’System Items’ flex field that is shipped with the product to configure your item flex field. The flex field code is MSTK.


The primary key for an item is the INVENTORY_ITEM_ID and ORGANIZATION_ID. Therefore, the same item can be defined in more than one organization. Each item is initially defined in an item master organization. The user then assigns the item to other Organizations that need to recognize this item; a row is inserted for each new organization the item is assigned to. Many columns such as MTL_TRANSACTIONS_ENABLED_FLAG and BOM_ENABLED_FLAG correspond to item attributes defined in then MTL_ITEM_ATTRIBUTES table.

Two units of measure columns are stored in MTL_SYSTEM_ITEMS table. PRIMARY_UOM_CODE is the 3–character unit that is used throughout Oracle Manufacturing. PRIMARY_UNIT_OF_MEASURE is the 25–character unit that is used throughout Oracle Purchasing. Items now support multilingual description. MLS is implemented with a pair of tables: MTL_SYSTEM_ITEMS_B and MTL_SYSTEM_ITEMS_TL. Translations table (MTL_SYSTEM_ITEMS_TL) holds item descriptions in multiple languages. DESCRIPTION column in the base table (MTL_SYSTEM_ITEMS_B) is for backward compatibility and is maintained in the installation base language only.




MTL_ITEM_STATUS

MTL_ITEM_STATUS is the definition table for material status codes. Status code is a required item attribute. It indicates the status of an item, i.e., Active, Pending, Obsolete. The status optionally controls several ’function controlling’ item attributes (status attributes) and can be used to disable the item from being used by the various application products.


MTL_UNITS_OF_MEASURE_TL

MTL_UNITS_OF_MEASURE_TL is the definition table for both the 25–character and the 3–character units of measure. The base_uom_flag indicates if the unit of measure is the primary unit of measure for the uom_class. Oracle Inventory uses this table to keep track of the units of measure used to transact an item. This table is also used by Oracle Purchasing, Oracle Order Management and Oracle Shipping Execution.


MTL_ITEM_LOCATIONS

MTL_ITEM_LOCATIONS is the definition table for stock locators. The associated attributes describe which sub inventory this locator belongs to, what the locator physical capacity is, etc. The locator is a key flex field. The Flex field Code is MTLL.


Entity 2
MTL_ITEM_CATEGORIES

This table stores the item assignments to categories within a category set. For each category assignment, this table stores the item, the category set, and the category. Items may be assigned to multiple categories and category sets but may be assigned to only one category in a given category set. This table may be populated through the Master Items and Organization items windows. It can also be populated by performing item assignments when a category set is defined. It is also populated when an item is transferred from engineering to manufacturing.

MTL_CATEGORIES

This is the code combinations table for item categories. Items are grouped into categories within the context of a category set to provide flexible grouping schemes. The item category is a key flexfield with a flex code of MCAT. Item categories now support multilingual category description. MLS is implemented with a pair of tables: MTL_CATEGORIES_B and MTL_CATEGORIES_TL.


MTL_CATEGORY_SETS

MTL_CATEGORY_SETS contains the entity definition for category sets. A category set is a categorization scheme for a group of items. Items may be assigned to different categories in different category sets to represent the different groupings of items used for different purposes. An item may be assigned to only one category within a category set, however, STRUCTURE_ID identifies the flexfield structure associated with the category set. Only categories with the same flexfield structure may be grouped into a category set.

CONTROL_LEVEL defines whether the category set is controlled at the item or the item/organization level. When an item is assigned to an item level category set within the item master organization, the category set assignment is propagated to all other organizations to which the item is assigned. VALIDATE_FLAG defines whether a list of valid categories is used to validate category usage within the set. Validated category sets will not allow item assignment to the category set in categories that are not in a predefined list of valid categories. Category Sets now support multilingual category set name and description. MLS is implemented with a pair of tables: MTL_CATEGORY_SETS_B and MTL_CATEGORY_SETS_TL.



Entity 3
MTL_DEMAND

This table stores demand and reservation information used in Available To Promise, Planning and other Manufacturing functions. There are three major row types stored in the table: Summary Demand rows, Open Demand Rows, and Reservation Rows.

Summary Demand is direct demand for an item within an organization on a particular date that originated from a particular source. For hard reservations there are several columns which further define what the reservation is for, and where it is being placed. Currently, four sources of demand are supported, Sales Order, Account, Account Alias, and User Defined transaction sources. Five different types of demand, denoted by DEMAND_TYPE column, are used. These five types are Model, Option Class, Option Item, Configuration Item and Derived. Derived demand rows are inserted by BOM Demand exploder when demanded item has ATP table components. Each Summary Demand row may be associated with one or more Reservation rows. Reservation may be placed against a particular inventory control (that is, specific sub inventory, locator, revision and lot) against any sources (that is, Account Number, Account Alias, Sales Order or even User–Defined sources). Each Summary Demand row may be associated with one or more detailed rows. The detailed rows consist of reservations and open demand. A reservation row represents a firm promise of a supply source. Currently, two types of reservation are supported, reservations to on–hand, and reservations to WIP jobs. Each summary demand row may be associated with one and only one open demand row. Open Demand rows represent the un–reserved portion of the Summary Demand.


MTL_SECONDARY_INVENTORIES

MTL_SECONDARY_INVENTORIES is the definition table for the sub inventory. A sub inventory is a section of inventory, i.e., raw material, finished goods, etc. Sub inventories are assigned to items (in a many to one relationship), indicating a list of valid places where this item will physically exist in inventory. Other attributes include general ledger accounts, demand picking order, locator type, availability type, and reservable type. You can also specify whether this sub inventory is an expense or asset sub inventory (ASSET_INVENTORY) or whether quantities are tracked (QUANTITY_TRACKED).


MTL_ONHAND_QUANTITIES

MTL_ONHAND_QUANTITIES stores quantity on hand information by control level and location. MTL_ONHAND_QUANTITIES is maintained as a stack of receipt records, which are consumed by issue transactions in FIFO order. The quantity on hand of an item at any particular control level and location can be found by summing TRANSACTION_QUANTITY for all records that match the criteria. Note that any transactions which are committed to the table MTL_MATERIAL_TRANSACTIONS_TEMP are considered to be played out as far as quantity on hand is concerned in Inventory transaction forms. All our Inquiry forms and ABC compile are only based on MTL_ONHAND_QUANTITIES.MTL_ONHAND_QUANTITIES has two columns, CREATE_TRANSACTION_ID and UPDATE_TRANSACTION_IDs to join to MTL_MATERIAL_TRANSACTIONS.TRANSACTION_ID the transactions that created the row and the transaction that last updated a row.





Entity 4

MTL_TRANSACTION_TYPES

MTL_TRANSACTION_TYPES contains seeded transaction types and the user defined ones. USER_DEFINED_FLAG will distinguish the two. The table also stores the TRANSACTION_ACTION_ID and TRANSACTION_SOURCE_TYPE_ID that is associated with each transaction type.


MTL_MATERIAL_TRANSACTIONS

MTL_MATERIAL_TRANSACTIONS stores a record of every material transaction or cost update performed in Inventory.

Records are inserted into this table either through the transaction processor or by the standard cost update program. The columns

TRANSACTION_TYPE_ID, TRANSACTION_ACTION_ID, TRANSACTION_SOURCE_TYPE_ID, TRANSACTION_SOURCE_ID and TRANSACTION_SOURCE_NAME describe what the transaction is and against what entity it was performed. All accounting journal entries for a given transaction are stored in MTL_TRANSACTION_ACCOUNTS, joined by the column TRANSACTION_ID. If the item is under lot control then the lot records are stored in

MTL_TRANSACTION_LOT_NUMBERS, joined by the column TRANSACTION_ID. If the item is under serial control then the serial records are stored in MTL_UNIT_TRANSACTIONS, joined by the column TRANSACTION_ID. The Item revision and locator control are stored in the columns REVISION and LOCATOR_ID respectively. Transfer transactions are represented as two single records in the table. They are related through the column TRANSFER_TRANSACTION_ID, which contains the TRANSACTION_ID of the other transaction in the transfer. The index MTL_MATERIAL_TRANSACTIONS_UPGD is used only during install and upgrade, and will be dropped during the course thereof, but is included here for completeness.