17.05 - Example: Merging into a Table with an Implicit Isolated Load Operation - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Manipulation Language

Product
Advanced SQL Engine
Teradata Database
Release Number
17.05
Published
January 2021
Language
English (United States)
Last Update
2021-01-22
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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 are the table definitions for the example:
CREATE TABLE ldi_table1,
     WITH CONCURRENT ISOLATED LOADING FOR ALL
     (a INTEGER,
      b INTEGER,
      c INTEGER)
PRIMARY INDEX ( a );


CREATE TABLE t1
     (c1 INTEGER,
      c2 INTEGER,
      c3 INTEGER)
PRIMARY INDEX ( c1 );
This statement performs a merge into the load isolated table ldi_table1 from table t1 as an implicit concurrent load isolated operation:
MERGE WITH ISOLATED LOADING INTO ldi_table1
    USING t1 ON a=c1
    WHEN NOT MATCHED THEN INSERT
    VALUES (c1, c2, c3);