# 22. Virtuoso Functions Guide - set_identity_column

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Functions Index

## set_identity_column

sets the sequence starting value for an identity column
integer set_identity_column (in table_name varchar, in column_name varchar, in new_value integer);
Description

This function takes the table name, the column name and the new sequence value as parameters. It checks for the existence of the identity column, and then sets the sequence value (using the sequence_set) and returns the old sequence value. The table and column names must be properly qualified to ensure the correct resource is located. The effect of calling this function is immediate.

Parameters
table_name – the fully qualified table name in the correct case exactly as it appears in the DB.DBA.SYS_KEYS table.
column_name – the exact column name as it appears in the DB.DBA.SYS_COLS table.
new_value – the new sequence value.
Return Types

the previous sequence value