Zhengcy05 opened a new pull request, #38829:
URL: https://github.com/apache/shardingsphere/pull/38829
Fixes #38709.
### Changes
Changes proposed in this pull request:
- Preserve MySQL `TEMPORARY` semantics in `CreateTableStatement` and
`DropTableStatement`
- Populate the temporary-table flag in `MySQLDDLStatementVisitor`
- Preserve the temporary flag during statement binding
- Add a pre-execution guard in `KernelProcessor` to reject `CREATE
TEMPORARY TABLE` and `DROP TEMPORARY TABLE`
- Throw `UnsupportedSQLOperationException` before SQL is sent to backend
- Add regression tests for parser semantics, kernel guard behavior, and
proxy execution flow
### Tests
Added regression coverage for:
- MySQL parser / visitor temporary semantics
- kernel-level pre-execution rejection
- proxy execution flow to verify temporary table DDL does not enter metadata
refresh
Executed tests:
```bash
mvn -pl parser/sql/engine/dialect/mysql -am -Dtest=MySQLStatementVisitorTest
-Dsurefire.failIfNoSpecifiedTests=false -DfailIfNoTests=false test
mvn -pl infra/context -am -Dtest=KernelProcessorTest
-Dsurefire.failIfNoSpecifiedTests=false -DfailIfNoTests=false test
mvn -pl proxy/backend/core -am -Dtest=StandardDatabaseProxyConnectorTest
-Dsurefire.failIfNoSpecifiedTests=false -DfailIfNoTests=false test
```
---
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- [x] I have added corresponding unit tests for my changes.
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