The SA_LABEL_ADMIN.ALTER_LABEL procedure alters the string label definition associated with a label tag. The label itself cannot be altered.
If you alter the string associated with the label tag, the sensitivity of the data in the row alters accordingly. Make sure that when you specify a label to be altered, the label can be referenced by its label tag or string value.
Applicability
This topic applies only to OceanBase Database Enterprise Edition. OceanBase Database Community Edition provides only the MySQL mode.
Syntax
SA_LABEL_ADMIN.ALTER_LABEL (
policy_name IN VARCHAR,
label_tag IN BINARY_INTEGER,
new_label_value IN VARCHAR := NULL,
new_data_label IN BOOLEAN := NULL );
Parameters
Parameter |
Description |
|---|---|
| policy_name | The name of an existing policy. You can query the POLICY_NAME column of the ALL_SA_POLICIES data dictionary view for existing policies. |
| label_tag | The integer tag assigned to the to-be-altered label. You can query the LABEL_TAG column of the ALL_SA_LABELS view for existing labels. |
| new_label_value | The new string representation of the label value. If the value is NULL, the existing value is not changed. |
| new_data_label | The value of this parameter is TRUE if the label can be used to label row data. If the value is NULL, the existing value is not changed. |
Examples
The following example modifies the label_tag and label_value settings of shield_agent_policy:
BEGIN
SA_LABEL_ADMIN.ALTER_LABEL (
policy_name => 'shield_agent_policy',
label_tag => 60000,
new_label_value => 'L6',
new_data_label => TRUE);
END;
/