Language: Java
Label: vulnerable
CWE: CWE-89 \u2014 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component.

Code:
    public Object visit(PropertyIsNull filter, Object extraData) {
        final PropertyName propertyName = (PropertyName) filter.getExpression();
        final String propertyTypesParam = propertyTypesParam(propertyName);

        StringBuilder builder =
                append(
                        extraData,
                        "(oid IN (SELECT oid FROM object_property WHERE property_type IN (:",
                        propertyTypesParam,
                        ") AND value IS NULL) OR oid NOT IN (SELECT oid FROM object_property WHERE property_type IN (:"
                                + propertyTypesParam
                                + "))) /* ",
                        filter.toString(),
                        " */\n");
        return builder;
    }