Teradata Parallel Data Pump

Chapter 3: Teradata TPump Commands
DML
Sample Scripts
Teradata TPump converts INSERT, UPDATE, and DELETE statements into macro
equivalents, and, depending on the packing specified, submits multiple statements in one
request. Teradata TPump also supports the EXECUTE statement, which can be used to bypass
the macro creation step for frequently executed macros. For more information on the
EXECUTE statement, refer to EXECUTE in this chapter.
The maximum number of INSERT, UPDATE, and DELETE statements that can be referenced
in an IMPORT is 128. The 128th DML which would cause the insertion of the DML sequence
number of 128 for the DMLSEQ field in the error table could lead to Teradata Database 3520
error.
At the end of an IMPORT, an environmental variable is established for each DML command
executed. Teradata TPump variables are not limited to 30 characters. These variables contain
the activity counts associated with each statement. The variables created are of the form:
&IMP __
where
n = the number of the IMPORT, from one through four.
Apply label = the label of the clause containing the DML command in question.
x = the number of the statement within the containing APPLY clause.
Serialization
The SERIALIZEON keyword allows serialization to be turned on for the specified fields. The
SERIALIZEON keyword can be used before, after, or between any IGNORE or MARK
statements.
The SERIALIZEON keyword can also be used with the SERIALIZE keyword in the BEGIN
LOAD command and with the KEY keyword in the FIELD command. When it is used in this
way, the DML-level serialization ignores and overrides the BEGIN LOAD-level serialization.
In addition, the DML serialized APPLYs can be mixed with nonserialized DML APPLYs in the
same IMPORT command.
See “BEGIN LOAD” and “FIELD” for details about these commands.
The following is an example using the SERIALIZEON keyword:
.LOGTABLE TPLOG01;
.LOGON slugger/dbc,dbc;
.BEGIN LOAD
ERRLIMIT 100 50
CHECKPOINT 15
SESSIONS 20
TENACITY 2
ERRORTABLE TPERR01
PACK 30
ROBUST ON
NOMONITOR;
.LAYOUT LAY01;
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