Load data via SQL * Loader in IDENTITY column in Oracle 12c

Question

I need to load data using SQL* Loader into Oracle table with GENERATE ALWAYS AS IDENTITY

CREATE TABLE tbl_identity
(
  col1 NUMBER(10,0) GENERATED ALWAYS AS IDENTITY(START WITH 7 INCREMENT BY 1)    NOT NULL,
  col2 VARCHAR2(20)
);

But when I try to load data in this table, I get an error

ORA-32795: cannot insert into a generated always identity column

Maybe there are any option in SQLLDR which skip IDENTITY for a while?

Or maybe there are any ideas how I can load data into GENERATED ALWAYS IDENTITY column using SQLLDR?

SQLLDR command

sqlldr userid=user/passw@TNS control=tbl_identity.ctl log=tbl_identity.log rows=1000 readsize=65535 bindsize=65535

CTL-file

OPTIONS(direct=false)
LOAD DATA
INFILE 'tbl_identity.txt'
INTO TABLE tbl_identity
INSERT
FIELDS TERMINATED BY ',' OPTIONALLY ENCLOSED BY '"' TRAILING NULLCOLS
(col1,
 col2)

Answer 1

将您的 DDL 从GENERATED ALWAYS更改为GENERATED BY DEFAULT

Answer 2

I use the following script before loading the data :

begin
  for rec in (
    select owner, table_name, column_name, generation_type
    from all_tab_identity_cols
    where owner = 'owner '
      and generation_type in ('ALWAYS')
      and table_name in ('','',......)
  )loop
     -- before load data
     if rec.generation_type = 'ALWAYS' then
       execute immediate 'alter table '||rec.owner||'.'||rec.table_name||' modify '||rec.column_name||' generated by default as identity';
     end if;
     if rec.generation_type = 'BY DEFAULT' then
     -- return (after data load)
       execute immediate 'alter table '||rec.owner||'.'||rec.table_name||' modify '||rec.column_name||' generated always as identity';
     end if;
  end loop;
end;            
/

and then return everything to the way it was.

Be careful, list the right tables in the query!