Oracle renaming auto generated list paritions - oracle

Question

I have several environments where automatic list partitioning is implemented.
Some product managers don't like the system GENERATED partition name, which is being GENERATED and want to reference the partition by a more meaningful name.
In an effort to address those concerns I'm trying to create a procedure, which will rename the partition based on the high_value. In the example below I am partitioning by state so the names I want to generate are P_OHIO, P_IOWA..
In the procedure below I am getting the following error:
ORA-14048: a partition maintenance operation may not be combined with other operations ORA-06512:
Can someone please advise me on why I am getting this error and how to rectify it.
Thanks in advance for your help and expertise.
CREATE TABLE T21
(
seq_num NUMBER GENERATED BY DEFAULT AS IDENTITY (START WITH 1) NOT NULL,
num NUMBER(*,0),
state VARCHAR2(20)
)
SEGMENT CREATION DEFERRED
PARTITION BY LIST (state) AUTOMATIC
(PARTITION P_CALIFORNIA VALUES ('CALIFORNIA')
);
insert into t21 (num, state)
select
level * round(dbms_random.value(1,50)),
case round(dbms_random.value(1,50))
when 1 then 'Alabama'
when 2 then 'Alaska'
when 3 then 'Arizona'
when 4 then 'Arkansas'
when 5 then 'California'
when 6 then 'Colorado'
when 7 then 'Connecticut'
when 8 then 'Delaware'
when 9 then 'Florida'
when 10 then 'Georgia'
when 11 then 'Hawaii'
when 12 then 'Idaho'
when 13 then 'Illinois'
when 14 then 'Indiana'
when 15 then 'Iowa'
when 16 then 'Kansas'
when 17 then 'Kentucky'
when 18 then 'Louisiana'
when 19 then 'Maine'
when 20 then 'Maryland'
when 21 then 'Massachusetts'
when 22 then 'Michigan'
when 23 then 'Minnesota'
when 24 then 'Mississippi'
when 25 then 'Missouri'
when 26 then 'Montana'
when 27 then 'Nebraska'
when 28 then 'Nevada'
when 29 then 'New Hampshire'
when 30 then 'New Jersey'
when 31 then 'New Mexico'
when 32 then 'New York'
when 33 then 'North Carolina'
when 34 then 'North Dakota'
when 35 then 'Ohio'
when 36 then 'Oklahoma'
when 37 then 'Oregon'
when 38 then 'Pennsylvania'
when 39 then 'Rhode Island'
when 40 then 'South Carolina'
when 41 then 'South Dakota'
when 42 then 'Tennessee'
when 43 then 'Texas'
when 44 then 'Utah'
when 45 then 'Vermont'
when 46 then 'Virginia'
when 47 then 'Washington'
when 48 then 'West Virginia'
when 49 then 'Wisconsin'
when 50 then 'Wyoming'
end
from dual
connect by level <= 100;
SELECT TABLE_NAME, PARTITION_NAME, HIGH_VALUE FROM USER_TAB_PARTITIONS WHERE TABLE_NAME ='T21';
CREATE OR REPLACE PROCEDURE RenameListPartitions
IS
CURSOR PartTables IS
SELECT TABLE_NAME
FROM USER_PART_TABLES
WHERE PARTITIONING_TYPE = 'LIST'
ORDER BY TABLE_NAME;
CURSOR TabParts(aTableName VARCHAR2) IS
SELECT PARTITION_NAME, HIGH_VALUE
FROM USER_TAB_PARTITIONS
WHERE regexp_like(partition_name,'^SYS_P[[:digit:]]{1,10}') AND
TABLE_NAME = aTableName AND
table_name not like 'BIN$%'
ORDER BY PARTITION_POSITION;
newPartName VARCHAR2(30);
BEGIN
FOR aTab IN PartTables LOOP
FOR aPart IN TabParts(aTab.TABLE_NAME) LOOP
execute immediate 'select ' || aPart.HIGH_VALUE || ' from dual' into newPartName;
IF newPartName <> aPart.PARTITION_NAME THEN
EXECUTE IMMEDIATE 'ALTER TABLE '||aTab.TABLE_NAME||' RENAME PARTITION '||aPart.PARTITION_NAME||' TO '||newPartName;
END IF;
END LOOP;
END LOOP;
END RenameListPartitions;
/
EXEC RenameListPartitions;

Answer 1

Some of your partition values have spaces - like 'New York' - so you need to quote the identifiers for the partitions:
EXECUTE IMMEDIATE 'ALTER TABLE '||aTab.TABLE_NAME
||' RENAME PARTITION '||aPart.PARTITION_NAME
||' TO "'||newPartName||'"';
db<>fiddle
Of course, that means you also need to quote them when you refer to them explicitly in the future; it might be better to, say, replace spaces with underscores and change to uppercase, so you get NEW_YORK:
EXECUTE IMMEDIATE 'ALTER TABLE '||aTab.TABLE_NAME
||' RENAME PARTITION '||aPart.PARTITION_NAME
||' TO '||upper(replace(newPartName,' ','_'));
db<>fiddle