Re: Identity column re-using existing numbers?

Hi Matt,

For this purpose we use the following SQL function:

CREATE OR REPLACE PROCEDURE
Sync_Identity_Counter
(
IN peSchemaName VARCHAR(128),
IN peTableName VARCHAR(128)
)
LANGUAGE SQL
BEGIN
DECLARE sqlcode INTEGER;
DECLARE maxid BIGINT;
DECLARE idcolname VARCHAR(128);
DECLARE stmttxt VARCHAR(1000);
DECLARE cur CURSOR FOR prepstm;

SET peTableName = UCASE(peTableName);
SET peSchemaName = UCASE(peSchemaName);
SELECT
sc.column_name
INTO
idcolname
FROM
qsys2/syscolumns AS sc
WHERE
sc.table_name = peTableName
AND
sc.table_schema = peSchemaName
AND
sc.is_identity = 'YES';
IF SQLCODE = 100 THEN
SIGNAL SQLSTATE '78000'
SET MESSAGE_TEXT = 'Cannot find identity column.';
END IF;
SET stmttxt = 'SELECT IFNULL(MAX("' ||
idcolname || '") , 0) FROM "' ||
peSchemaName || '"/"' || peTableName || '"';
PREPARE prepstm FROM stmttxt;
SET maxid = 0;
OPEN cur;
FETCH cur INTO maxid;
CLOSE cur;
SET stmttxt = 'ALTER TABLE "' || peSchemaName ||
'"/"' || peTableName ||
'" ALTER COLUMN "' || idcolname ||
'" RESTART WITH ' || CHAR(maxid + 1);
EXECUTE IMMEDIATE stmttxt;
END
;

Best regards,
-Arco
Op di 4 dec. 2018 om 20:18 schreef Matt Olson <Matt.Olson@xxxxxxxx>:

We migrated some of our tables to another partition for testing and we have noticed that their identity columns which should generate the next available number is infact generating an existing number and failing the primary key check. Has anyone see this before?

There some easy command to restart identity value to the next available number?

We are mystified why this didn't come over during the restore of that file...

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