Example: Updating a Table with an Implicit Isolated Load Operation - Analytics Database - Teradata Vantage

SQL Data Manipulation Language

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2024-04-05
dita:mapPath
pon1628111750298.ditamap
dita:ditavalPath
qkf1628213546010.ditaval
dita:id
esx1472246586715
lifecycle
latest
Product Category
Teradata Vantage™

For information on defining a load isolated table, see the WITH ISOLATED LOADING option for CREATE TABLE and ALTER TABLE in Teradata Vantage™ - SQL Data Definition Language Syntax and Examples, B035-1144.

Following is the table definition for the example.
CREATE TABLE ldi_table1,
     WITH CONCURRENT ISOLATED LOADING FOR ALL
     (a INTEGER,
      b INTEGER,
      c INTEGER)
PRIMARY INDEX ( a );
This statement performs an update on the load isolated tableldi_table1 as an implicit concurrent load isolated operation:
UPDATE WITH CONCURRENT ISOLATED LOADING ldi_table1 SET b = b + 1;

An EXPLAIN shows that the UPDATE step is performed as concurrent load isolated. The isolated load begins and performs a concurrent load isolated UPDATE of ldi_table1 (Load Uncommitted) with a condition of ("(ldi_table1.TD_ROWLOADID_DEL = 0) AND ((1=1))").