C++ ExprNode::getChild方法代码示例

short CmpStatement::getDDLExprAndNode(char * sqlStr, Lng32 inputCS,
                                      DDLExpr* &ddlExpr, ExprNode* &ddlNode)
{

  ddlNode = NULL;
  ddlExpr = NULL;
      
  if (! sqlStr)
    return 0;

  // C control character embedded in sqlStr is not handled.  Now replace 
  // control characters tabs, line feeds, spaces with spaces. (no longer 
  // substitute for \n so we can recognized embedded comments)
  for (Int32 i = 0; sqlStr[i]; i++)
    if (sqlStr[i] != '\n' && isSpace8859_1((unsigned char)sqlStr[i])) sqlStr[i] = ' ';
  
  // skip leading blanks
  NAString ns(sqlStr);
  ns = ns.strip(NAString::leading, ' ');
  
  ReturnStatus status = CmpStatement_SUCCESS;
  CmpMain::ReturnStatus rs = CmpMain::SUCCESS;
  
  QueryText qText(sqlStr, inputCS);
  
  //  CmpMessageReplyCode
  //    *bound = new(outHeap_) CmpMessageReplyCode(outHeap_, statement.id(), 0, 0, outHeap_);
  
  Set_SqlParser_Flags(DELAYED_RESET);	// sqlcompCleanup resets for us
  Parser parser(CmpCommon::context());
  BindWA bindWA(ActiveSchemaDB(), CmpCommon::context(), TRUE);

  ExprNode *boundDDL = NULL;
  RelExpr * rRoot = NULL;
  
  // save parser flags
  Int32 savedParserFlags = Get_SqlParser_Flags (0xFFFFFFFF);
  ExprNode * exprNode = NULL;
  if (parser.parseDML(qText, &exprNode, NULL))
    {
      error(arkcmpErrorNoDiags, sqlStr);
      sqlTextStr_=NULL;
      goto label_error;
    }
  
  if (exprNode->getOperatorType() EQU STM_QUERY)
    {
      rRoot = (RelRoot*)exprNode->getChild(0);
    }
  else if (exprNode->getOperatorType() EQU REL_ROOT)
    {
      rRoot = (RelRoot*)exprNode;
    }
  
  CMPASSERT(rRoot);
  
  boundDDL = rRoot->bindNode(&bindWA);
  CMPASSERT(boundDDL);
  
  if (CmpCommon::diags()->getNumber(DgSqlCode::ERROR_))
    {
      goto label_error;
    }
  
  ddlExpr = (DDLExpr*)rRoot->getChild(0);
  ddlNode = ddlExpr->getDDLNode();
  
  if (ddlNode)
    {
      boundDDL = ddlNode->castToStmtDDLNode()->bindNode(&bindWA);
      CMPASSERT(boundDDL);
      
      if (CmpCommon::diags()->getNumber(DgSqlCode::ERROR_))
        {
          goto label_error;
        }
      
      ddlNode = boundDDL;
    }

  Set_SqlParser_Flags (savedParserFlags);
  return 0;

 label_error:  
  // reset saved flags
  Set_SqlParser_Flags (savedParserFlags);
  return CmpStatement_ERROR;
}

//.........这里部分代码省略.........
      sqlTextLen_ = 0;
      
      if (recompControlInfo)
	restoreRecompControlInfo(recompControlInfo);
      return CmpStatement_SUCCESS;
    }

  ReturnStatus status = CmpStatement_SUCCESS;
  if (statement.getCmpCompileInfo()->isHbaseDDL())
    {
      CmpMain::ReturnStatus rs = CmpMain::SUCCESS;
      
      QueryText qText(sqlStr, inputCS);

      CmpMessageReplyCode
	*bound = new(outHeap_) CmpMessageReplyCode(outHeap_, statement.id(), 0, 0, outHeap_);

      //      CmpMain cmpmain;
      Set_SqlParser_Flags(DELAYED_RESET);	// sqlcompCleanup resets for us
      Parser parser(CmpCommon::context());
      BindWA bindWA(ActiveSchemaDB(), CmpCommon::context(), TRUE);

      // save parser flags
      Int32 savedParserFlags = Get_SqlParser_Flags (0xFFFFFFFF);
      ExprNode * exprNode = NULL;
      if (parser.parseDML(qText, &exprNode, NULL))
	{
	  error(arkcmpErrorNoDiags, statement.data());
	  sqlTextStr_=NULL;
	  return CmpStatement_ERROR;
	}

      RelExpr * rRoot = NULL;
      if (exprNode->getOperatorType() EQU STM_QUERY)
	{
	  rRoot = (RelRoot*)exprNode->getChild(0);
	}
      else if (exprNode->getOperatorType() EQU REL_ROOT)
	{
	  rRoot = (RelRoot*)exprNode;
	}
      
      CMPASSERT(rRoot);

      ExprNode *boundDDL = rRoot->bindNode(&bindWA);
      CMPASSERT(boundDDL);

      if (CmpCommon::diags()->getNumber(DgSqlCode::ERROR_))
	{
	  return CmpStatement_ERROR;
	}
      
      ExprNode * ddlNode = NULL;
      DDLExpr * ddlExpr = NULL;

      ddlExpr = (DDLExpr*)rRoot->getChild(0);
      ddlNode = ddlExpr->getDDLNode();

      if (ddlNode)
	{
	  boundDDL = ddlNode->castToStmtDDLNode()->bindNode(&bindWA);
	  CMPASSERT(boundDDL);

	  if (CmpCommon::diags()->getNumber(DgSqlCode::ERROR_))
	    {
	      return CmpStatement_ERROR;
	    }
 	  
	  ddlNode = boundDDL;
	}

      // reset saved flags
      Set_SqlParser_Flags (savedParserFlags);
      CmpSeabaseDDL cmpSBD(heap_);
      if (cmpSBD.executeSeabaseDDL(ddlExpr, ddlNode,
				   currCatName, currSchName))
      {
        Set_SqlParser_Flags(0);
	return CmpStatement_ERROR;
      }
      Set_SqlParser_Flags (0);

      // TEMPTEMP.
      // Until support for metadata invalidation is in, clear up query cache for
      // this process. That way statements issued later from this session will
      // not see stale definitions.
      // This also helps in running tests where tables are modified and accessed from
      // the same session.
      // This does not solve the issue of stale definition seen by other processes,
      // that will be fixed once we have metadata invalidation.
      CURRENTQCACHE->makeEmpty();

      return CmpStatement_SUCCESS;
    } // hbaseDDL

  // This is a normal DDL request, call Catalog manager
  *diags() << DgSqlCode(-4222)
           << DgString0("SQL Compiler DDL");
  return CmpStatement_ERROR;
}