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Dynamics 365
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Temporary Tables (AX 2012)

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 from 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 either the setTmpData() method
  • For TempDB tables, the linkPhysicalTableInstance() method replaces the setTmpData() call.

Code Examples:

– Open AOT/Data Dictonaries/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. “);

}

1) 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. “);

}

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