[GitHub] [shardingsphere] FlyingZC opened a new issue, #27148: Support parsing Oracle FLASHBACK TABLE sql

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

FlyingZC opened a new issue, #27148:
URL: https://github.com/apache/shardingsphere/issues/27148

   # Background
   Hi community,
   This issue is for #26878.
   
   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 Oracle SQL parsing in ShardingSphere.
   
   More details:
   https://shardingsphere.apache.org/document/current/en/reference/sharding/parse/
   
   # Task
   This issue is to support more oracle sql parse, as follows:
   ```sql
   FLASHBACK TABLE BIN$yrMKlZaVMhfgNAgAIMenRA==$0 TO BEFORE DROP;
   ```
   
   ```sql
   FUNCTION ODCIIndexClose(
      self IN impltype, 
      env ODCIEnv) 
   RETURN NUMBER
   ```
   
   ```sql
   FUNCTION ODCIIndexFetch(
      self IN [OUT] impltype, 
      nrows IN NUMBER, 
      rids OUT ODCIRidList, 
      env ODCIEnv) 
   RETURN NUMBER
   ```
   
   ```sql
   FUNCTION ODCIIndexGetMetadata(
      ia IN ODCIIndexInfo, 
      version IN VARCHAR2, 
      new_block OUT PLS_INTEGER,
      env ODCIEnv) 
   RETURN VARCHAR2;
   ```
   
   ```sql
   FUNCTION ODCIIndexStart(
      sctx IN OUT <impltype>, 
      ia ODCIIndexInfo, 
      pi ODCIPredInfo, 
      qi ODCIQueryInfo, 
      strt <opbndtype>, 
      stop <opbndtype>, 
      <valargs>, 
      env ODCIEnv)
   RETURN NUMBER
   ```
   
   # Process
   1. First confirm that this is a correct oracle sql syntax, if not please ignore;
   2. Compare SQL definitions in Oficial 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 Statment 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 Oracle SQLs


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[GitHub] [shardingsphere] FlyingZC closed issue #27148: Support parsing Oracle FLASHBACK TABLE sql

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

FlyingZC closed issue #27148: Support parsing Oracle FLASHBACK TABLE sql
URL: https://github.com/apache/shardingsphere/issues/27148


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