External Table With Null String Passed in OPTIONALLY ENCLOSED BY Clause Hangs
Last updated on JANUARY 16, 2017
Applies to:
Oracle Database - Enterprise Edition - Version 9.2.0.8 to 12.1.0.2 [Release 9.2 to 12.1]Information in this document applies to any platform.
Symptoms
You created an external table with a field termination clause of OPTIONALLY ENCLOSED BY '' that is accepted by the ORACLE_LOADER access driver:
create table test_ext
(
field1 varchar2(10),
field2 varchar2(10),
field3 varchar2(10)
)
organization external
(
type oracle_loader
default directory ext
access parameters
(
records delimited by newline
fields terminated by ','
optionally enclosed by ''
missing field values are null
(
field1 char(10),
field2 char(10),
field3 char(10)
)
)
location ( 'test.csv' )
);
(
field1 varchar2(10),
field2 varchar2(10),
field3 varchar2(10)
)
organization external
(
type oracle_loader
default directory ext
access parameters
(
records delimited by newline
fields terminated by ','
optionally enclosed by ''
missing field values are null
(
field1 char(10),
field2 char(10),
field3 char(10)
)
)
location ( 'test.csv' )
);
-- write input file test.csv in directory EXT with this content:
"FIELD1","FIELD2","FIELD3"
When the external table is selected in a SQL*Plus session, then this will hang forever and consume CPU:
SQL> select * from test_ext;
Cause
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