fix install issue with database 23c free

Author: ogobrecht

docs/getting-started.md

@@ -28,7 +28,7 @@
 We recommend to install the package `om_tapigen` in a central tools schema. Because the package runs with invokers rights you need to create a private or public synonym for SQL functions inside the package.
 
 1. Download the [latest version](https://github.com/OraMUC/table-api-generator/releases/latest) and unzip the source code
-1. Run the SQL script `install.sql` in the root folder
+1. Run the SQL script `om_tapigen_install.sql` in the root folder
 1. If installed in a central tools schema
     - grant execute rights: `GRANT EXECUTE ON om_tapigen TO PUBLIC;`
     - create synonym - public in tools schema: `CREATE PUBLIC SYNONYM om_tapigen FOR om_tapigen;`

om_tapigen_install.sql

@@ -9,7 +9,7 @@ prompt Set compiler flags
 declare
   v_db_version varchar2(10);
 begin
-  select replace(regexp_substr(version, '\d+\.\d+'), '.', null) as db_version
+  select replace(regexp_substr(min(version), '\d+\.\d+'), '.', null) as db_version
     into v_db_version
     from product_component_version
    where product like 'Oracle Database%';

src/om_tapigen_install.sql

@@ -9,7 +9,7 @@ prompt Set compiler flags
 declare
   v_db_version varchar2(10);
 begin
-  select replace(regexp_substr(version, '\d+\.\d+'), '.', null) as db_version
+  select replace(regexp_substr(min(version), '\d+\.\d+'), '.', null) as db_version
     into v_db_version
     from product_component_version
    where product like 'Oracle Database%';