water32 opened a new issue, #1323:
URL: https://github.com/apache/cloudberry/issues/1323
### Apache Cloudberry version
2.0.1
### What happened
When there have some subpartition template in the database, an error occurs
when using pg_get_expr to read the template. This bug has been fixed in
Greenplum(open sorce code).
ERROR: unrecognized node type: 758 (ruleutils.c:9700)
### What you think should happen instead
In the new version(gp7), the pg_partition_rule system table is deprecated
and pg_get_expr is used for parsing it. But, this function does not provide
relevant code， it can refer to the open source gp code to solve.
### How to reproduce
how to repro：
--create partition table and subtemplate
CREATE TABLE test_subtemp
(
log_id integer,
log_date date,
log_type text
)
WITH (APPENDONLY=FALSE)
DISTRIBUTED RANDOMLY PARTITION BY RANGE(log_date);
-- Child table name: public.logs_1_prt_p1
CREATE TABLE test_subtemp_1_prt_p1 PARTITION OF test_subtemp FOR VALUES
FROM (MINVALUE) TO ('2025-07-31') PARTITION BY LIST(log_type) WITH
(APPENDONLY=FALSE);
-- Child table name: public.logs_1_prt_p1_2_prt_s1
CREATE TABLE test_subtemp_1_prt_p1_2_prt_s1 PARTITION OF
test_subtemp_1_prt_p1 FOR VALUES IN ('1', '2', '3') WITH (APPENDONLY=FALSE);
ALTER TABLE test_subtemp SET SUBPARTITION TEMPLATE
(
SUBPARTITION "1 2" VALUES ('1', '2', '3')
);
--query subtemplate
SELECT pg_get_expr(template, relid) FROM gp_partition_template;
--ERROR
ERROR: unrecognized node type: 758 (ruleutils.c:9700)
### Operating System
Red Hat Enterprise Linux Server release 7.7 (Maipo)
### Anything else
_No response_
### Are you willing to submit PR?
- [ ] Yes, I am willing to submit a PR!
### Code of Conduct
- [x] I agree to follow this project's [Code of
Conduct](https://github.com/apache/cloudberry/blob/main/CODE_OF_CONDUCT.md).
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