[PR] Fix unparseable multi-table DROP TABLE in Oracle parser example [shardingsphere]

["thswlsqls (via GitHub)" <gi...@apache.org>]

thswlsqls opened a new pull request, #39152:
URL: https://github.com/apache/shardingsphere/pull/39152

   Fixes #39150.
   
   Changes proposed in this pull request:
     - Change the Oracle example's `DDL_DROP_SQL` from `DROP TABLE table1, table2;` to `DROP TABLE table1;`.
     - The comma-separated multi-table form is MySQL syntax; Oracle's `dropTable` grammar (`DROP TABLE tableName (CASCADE CONSTRAINTS)? (PURGE)?`) accepts a single table only, so under the Oracle dialect the statement failed to parse and `OracleParserStatementExample.main()` threw before reaching the DROP and ALTER demos.
     - After the change, the example parses and visits all statements (SELECT, INSERT, UPDATE, DELETE, CREATE TABLE, DROP TABLE, ALTER TABLE) without exception; single-table DROP is the valid Oracle form and still demonstrates the DROP TABLE statement type.
   
   ---
   
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   - [x] I have self-reviewed the commit code.
   - [ ] I have (or in comment I request) added corresponding labels for the pull request.
   - [ ] I have passed maven check locally : `./mvnw clean install -B -T1C -Dmaven.javadoc.skip -Dmaven.jacoco.skip -e`.
   - [ ] I have made corresponding changes to the documentation.
   - [ ] I have added corresponding unit tests for my changes.
   - [ ] I have updated the Release Notes of the current development version.
   


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Re: [PR] Fix unparseable multi-table DROP TABLE in Oracle parser example [shardingsphere]

["terrymanu (via GitHub)" <gi...@apache.org>]

terrymanu merged PR #39152:
URL: https://github.com/apache/shardingsphere/pull/39152


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