Home
SQL programmingYou can use the HCL OneDB™ implementation of the SQL language to develop applications for HCL OneDB™ database servers.
Guide to SQL: SyntaxThe HCL OneDB™ Guide to SQL: Syntax describes the syntax of the statements, data types, expressions, operators, and built-in functions of the HCL OneDB™ dialect of the SQL language.
SQL statementsThis chapter describes the syntax and semantics of SQL statements that are recognized by HCL OneDB™.
ALTER FRAGMENT statementUse the ALTER FRAGMENT statement to change the distribution strategy or the storage location of an existing table or index. This statement is an extension to the ANSI/ISO standard for the SQL language.
INIT ClauseThe INIT clause of the ALTER FRAGMENT statement can define or modify the fragmentation strategy or the storage location of an existing table or an existing index.
FRAGMENT BY Clause for TablesUse the FRAGMENT BY option of the INIT clause of the ALTER FRAGMENT statement to fragment an existing nonfragmented table, or to convert one table fragmentation strategy to another.
Defining a Fragmentation Strategy on a Nonfragmented Table

Defining a Fragmentation Strategy on a Nonfragmented Table

The INIT clause can define a fragmentation strategy on a nonfragmented table, regardless of whether the table was created with a storage option.

CREATE TABLE balances (col1 INT, col2 INT) IN dbsp1;
ALTER FRAGMENT ON TABLE balances INIT 
   FRAGMENT BY EXPRESSION col1 <= 500 IN dbsp1,
      col1 > 500 AND col1 <=1000 IN dbsp2, REMAINDER IN dbsp3;

When you use the INIT clause to fragment an existing nonfragmented table, all indexes on the table become fragmented in the same way as the table.

Have feedback?
Google Analytics is used to store comments and ratings. To provide a comment or rating for a topic, click Accept All Cookies or Allow All in Cookie Preferences in the footer of this page.