예제 #1
0
  /**
   * @see org.teiid.query.resolver.CommandResolver#resolveCommand(org.teiid.query.sql.lang.Command,
   *     TempMetadataAdapter, boolean)
   */
  @Override
  public void resolveCommand(
      Command command, TempMetadataAdapter metadata, boolean resolveNullLiterals) throws Exception {

    DynamicCommand dynamicCmd = (DynamicCommand) command;

    Iterator columns = dynamicCmd.getAsColumns().iterator();

    Set<GroupSymbol> groups = new HashSet<GroupSymbol>();

    // if there is no into group, just create temp metadata ids
    if (dynamicCmd.getIntoGroup() == null) {
      while (columns.hasNext()) {
        ElementSymbol column = (ElementSymbol) columns.next();
        column.setMetadataID(new TempMetadataID(column.getShortName(), column.getType()));
      }
    } else if (dynamicCmd.getIntoGroup().isTempGroupSymbol()) {
      while (columns.hasNext()) {
        ElementSymbol column = (ElementSymbol) columns.next();
        GroupSymbol gs = getTeiidParser().createASTNode(ASTNodes.GROUP_SYMBOL);
        gs.setName(dynamicCmd.getIntoGroup().getName());
        column.setGroupSymbol(gs);
      }
    }

    ResolverVisitor visitor = new ResolverVisitor(getTeiidParser().getVersion());
    visitor.resolveLanguageObject(
        dynamicCmd, groups, dynamicCmd.getExternalGroupContexts(), metadata);
    String sqlType = getDataTypeManager().getDataTypeName(dynamicCmd.getSql().getType());
    String targetType = DataTypeManagerService.DefaultDataTypes.STRING.getId();

    if (!targetType.equals(sqlType)
        && !getDataTypeManager().isImplicitConversion(sqlType, targetType)) {
      throw new QueryResolverException(Messages.gs(Messages.TEIID.TEIID30100, sqlType));
    }

    if (dynamicCmd.getUsing() != null && !dynamicCmd.getUsing().isEmpty()) {
      for (SetClause clause : dynamicCmd.getUsing().getClauses()) {
        ElementSymbol id = clause.getSymbol();
        GroupSymbol gs = getTeiidParser().createASTNode(ASTNodes.GROUP_SYMBOL);
        gs.setName(ProcedureReservedWords.DVARS);
        id.setGroupSymbol(gs);
        id.setType(clause.getValue().getType());
        id.setMetadataID(new TempMetadataID(id.getName(), id.getType()));
      }
    }

    GroupSymbol intoSymbol = dynamicCmd.getIntoGroup();
    if (intoSymbol != null) {
      if (!intoSymbol.isImplicitTempGroupSymbol()) {
        ResolverUtil.resolveGroup(intoSymbol, metadata);
      } else {
        List symbols = dynamicCmd.getAsColumns();
        ResolverUtil.resolveImplicitTempGroup(metadata, intoSymbol, symbols);
      }
    }
  }
 /**
  * NOTE: we specifically don't need to visit the as columns or the using identifiers. These will
  * be resolved by the dynamic command resolver instead.
  *
  * @see LanguageVisitor#visit(org.teiid.query.sql.lang.DynamicCommand)
  */
 @Override
 public void visit(DynamicCommand obj) {
   preVisitVisitor(obj);
   visitNode(obj.getSql());
   visitNode(obj.getIntoGroup());
   if (obj.getUsing() != null) {
     for (SetClause setClause : obj.getUsing().getClauses()) {
       visitNode(setClause.getValue());
     }
   }
   postVisitVisitor(obj);
 }