### What problem does this PR solve?
fix show variable display wrong enable_nereids_planner value, introduced
by #49913
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [x] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [x] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
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- [ ] Add branch pick label <!-- Add branch pick label that this PR
should merge into -->
### What problem does this PR solve?
Problem Summary:
When fall back to old planner, the partition pruning of external table
will fail,
and NPE will be throw like:
```
2025-04-14 16:22:33,427 WARN (mysql-nio-pool-19697|237161) [HiveScanNode.getSplits():189] get file split failed for table: dwd_log_fact_channel_track_result_hi
java.lang.NullPointerException: null
at org.apache.doris.datasource.hive.source.HiveScanNode.getPartitions(HiveScanNode.java:137) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.datasource.hive.source.HiveScanNode.getSplits(HiveScanNode.java:171) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.datasource.FileQueryScanNode.createScanRangeLocations(FileQueryScanNode.java:366) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.datasource.FileQueryScanNode.doFinalize(FileQueryScanNode.java:222) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.datasource.FileQueryScanNode.finalize(FileQueryScanNode.java:208) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.planner.PlanNode.finalize(PlanNode.java:722) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.planner.JoinNodeBase.finalize(JoinNodeBase.java:456) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.planner.PlanNode.finalize(PlanNode.java:722) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.planner.JoinNodeBase.finalize(JoinNodeBase.java:456) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.planner.PlanNode.finalize(PlanNode.java:722) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.planner.AggregationNode.finalize(AggregationNode.java:402) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.planner.PlanNode.finalize(PlanNode.java:722) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.planner.SetOperationNode.finalize(SetOperationNode.java:158) ~[doris-fe.jar:1.2-SNAPSHOT]
at org.apache.doris.planner.PlanNode.finalize(PlanNode.java:722) ~[doris-fe.jar:1.2-SNAPSHOT]
```
This error msg is very confusing. So this PR return a more explicit
error msg.
### Release note
None
### What problem does this PR solve?
Issue Number: close #xxx
Related PR: #xxx
Problem Summary:
### Release note
Cherry-pick #50358
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR
should merge into -->
### What problem does this PR solve?
cherry-pick from master (#49381)
### Release note
None
### Check List (For Author)
- Test <!-- At least one of them must be included. -->
- [ ] Regression test
- [ ] Unit Test
- [ ] Manual test (add detailed scripts or steps below)
- [ ] No need to test or manual test. Explain why:
- [ ] This is a refactor/code format and no logic has been changed.
- [ ] Previous test can cover this change.
- [ ] No code files have been changed.
- [ ] Other reason <!-- Add your reason? -->
- Behavior changed:
- [ ] No.
- [ ] Yes. <!-- Explain the behavior change -->
- Does this need documentation?
- [ ] No.
- [ ] Yes. <!-- Add document PR link here. eg:
https://github.com/apache/doris-website/pull/1214 -->
### Check List (For Reviewer who merge this PR)
- [ ] Confirm the release note
- [ ] Confirm test cases
- [ ] Confirm document
- [ ] Add branch pick label <!-- Add branch pick label that this PR
should merge into -->
…ght, append_trailing_char_if_absent (#49127)
The url_encode function previously performed a modulus operation on a
signed number. Converting it to an unsigned number will fix the issue.
```
before
mysql> select url_encode('编码');
+----------------------+
| url_encode('编码') |
+----------------------+
| %5.%23%0-%5.%10%/( |
+----------------------+
now
mysql> select url_encode('编码');
+----------------------+
| url_encode('编码') |
+----------------------+
| %E7%BC%96%E7%A0%81 |
+----------------------+
```
The strright function did not calculate the length according to the
number of UTF-8 characters.
```
before
mysql> select strright("你好世界",5);
+----------------------------+
| strright("你好世界",5) |
+----------------------------+
| |
+----------------------------+
now
mysql> select strright("你好世界",5);
+----------------------------+
| strright("你好世界",5) |
+----------------------------+
| 你好世界 |
+----------------------------+
```
he case of inputting a UTF-8 character was not considered.
```
mysql> select append_trailing_char_if_absent('中文', '文');
+-------------------------------------------------+
| append_trailing_char_if_absent('中文', '文') |
+-------------------------------------------------+
| NULL |
+-------------------------------------------------+
now
mysql> select append_trailing_char_if_absent('中文', '文');
+-------------------------------------------------+
| append_trailing_char_if_absent('中文', '文') |
+-------------------------------------------------+
| 中文 |
+-------------------------------------------------+
```
