[GitHub] [shardingsphere] FlyingZC opened a new issue, #27652: Support parsing openGauss SELECT sql

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

FlyingZC opened a new issue, #27652:
URL: https://github.com/apache/shardingsphere/issues/27652

   # Background
   Hi community,
   
   ShardingSphere parser engine helps users parse a SQL to get the AST (Abstract Syntax Tree) and visit this tree to get SQLStatement (Java Object). Currently, we are planning to enhance the support for openGauss SQL parsing in ShardingSphere.
   
   More details:
   https://shardingsphere.apache.org/document/current/en/reference/sharding/parse/
   
   # Task
   This issue is to support more openGauss sql parse, as follows:
   ```sql
    SELECT id, PREDICT BY point_kmeans (FEATURES position) as pos FROM (select * from kmeans_2d limit 10);
   ```
   
   ```sql
    Explain CREATE MODEL patient_logisitic_regression USING logistic_regression FEATURES second_attack, treatment TARGET trait_anxiety > 50 FROM patients WITH batch_size=10, learning_rate = 0.05;
   ```
   
   ```sql
    CREATE MODEL patient_linear_regression USING linear_regression FEATURES second_attack,treatment TARGET trait_anxiety  FROM patients WITH optimizer='aa';
   ```
   
   ```sql
    CREATE MODEL patient_linear_regression USING linear_regression FEATURES second_attack,treatment TARGET trait_anxiety  FROM patients;
   ```
   
   ```sql
    select id, PREDICT BY patient_logistic_regression (FEATURES second_attack,treatment) FROM patients;
   ```
   
   # Process
   1. First confirm that this is a correct openGauss sql syntax, if not please leave a message under the issue and ignore it;
   2. Compare SQL definitions in Official SQL Doc and ShardingSphere SQL Doc;
   3. If there is any difference in ShardingSphere SQL Doc, please correct them by referring to the Official SQL Doc;
   4. Run mvn install the current_file_module;
   5. Check whether there are any exceptions. If indeed, please fix them. (Especially xxxVisitor.class);
   6. Add new corresponding SQL case in SQL Cases and expected parsed result in Expected Statement XML;
   7. Run SQLParserParameterizedTest to make sure no exceptions.
   
   # Relevant Skills
   1. Master JAVA language
   2. Have a basic understanding of Antlr `g4` file
   3. Be familiar with openGauss SQLs


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[GitHub] [shardingsphere] strongduanmu closed issue #27652: Support parsing openGauss SELECT sql

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

strongduanmu closed issue #27652: Support parsing openGauss  SELECT sql
URL: https://github.com/apache/shardingsphere/issues/27652


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