emeadaxsupport: Temporary Tables (AX 2012)

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Источник: http://blogs.msdn.com/b/axsupport/ar...s-ax-2012.aspx
==============

Set/Link Data on
Temporary Tables (AX 2012)

In Ax 2012, the Temporary property on tables was
replaced with a new property: TableType, which has three possible
values:

• Regular - a standard
  physical table
• InMemory - the type
  of temporary table which existed in the previous versions of Dynamics Ax.
  Such tables are held in memory and written to a local disk file once they
  grow beyond a certain point
• TempDB - a new
  option in Ax 2012. They are "physical" temporary tables held in
  the SQL Server database.

The new TempDB tables operate in a similar manner to InMemory
tables but support more features of standard physical tables:

• More powerful
  joins with physical tables are possible, and are properly supported by the
  database
• Can be
  per-company or global
• Support for
  normal tts transactions

To create
a new instance link (populating data/copying reference) from one table instance
variable to the other with Temporary type tables:

• For InMemory
  tables, by using the setTmpData() method
• For TempDB
  tables, the linkPhysicalTableInstance() method
  replaces the setTmpData() call.

Code Examples:

-
Open AOT/Data Dictonary/Tables

-
Create a New table, name it "TestTmp"

-
Expand it, create a new field of type string and name it "Id"

1)
InMemory:

- Set
the "TestTmp" table "TableType" property to
"InMemory", save

- Create
and run following job:

static void TestTmpInMemory(Args _args)

{

TestTmp tmp1, tmp2;

;

tmp1.Id = "1000";

tmp1.insert();



tmp2.setTmpData(tmp1);



info("Table
type: " + enum2Str(tmp1.getTableType()));



info("tmp1
data begin: ");



while
select tmp1

info(" Id " + tmp1.ID);



info("tmp1
data end.");



info("tmp2
data begin: ");



while
select tmp2

info(" Id " + tmp2.ID);



info("tmp2
data end.");

}



2)
TempDB:

- Set
the "TestTmp" table "TableType” property to "TempDB",
save

- Create
and run following job:

static void TestTmpTempDB(Args _args)

{

TestTmp tmp1, tmp2;

;

tmp1.Id = "1000";

tmp1.insert();



tmp2.linkPhysicalTableInstance(tmp1);



info("Table
type: " + enum2Str(tmp1.getTableType()));



info("tmp1
data begin: ");



while
select tmp1

info(" Id " + tmp1.ID);



info("tmp1
data end.");



info("tmp2
data begin: ");



while
select tmp2

info(" Id " + tmp2.ID);



info("tmp2
data end.");

}



Author: Mansour Yahya Mohammad

Date: 9/8-2012






Источник: http://blogs.msdn.com/b/axsupport/ar...s-ax-2012.aspx