@Override
    public Matcher visit(IsNull isNull) {
      return isNull
          .getField()
          .accept(
              new VisitorAdapter<Matcher>() {

                @Override
                public Matcher visit(final Field field) {
                  return new Matcher() {

                    @Override
                    public boolean match(DataRecord record) {
                      return record.get(field.getFieldMetadata()) == null;
                    }
                  };
                }

                @Override
                public Matcher visit(StagingBlockKey stagingBlockKey) {
                  return new Matcher() {

                    @Override
                    public boolean match(DataRecord record) {
                      return record
                              .getRecordMetadata()
                              .getRecordProperties()
                              .get(StagingStorage.METADATA_STAGING_BLOCK_KEY)
                          == null;
                    }
                  };
                }
              });
    }
Exemplo n.º 2
0
 @Override
 public void visit(IsNull obj) {
   visitNode(obj.getExpression());
   Column column = (Column) onGoingExpression.pop();
   // this will never be part of the rowid, as it can never be null, so scan
   this.doScanEvaluation = true;
 }
Exemplo n.º 3
0
  @SuppressWarnings("rawtypes")
  public static FilterConditionContext visit(
      IsNull obj, QueryBuilder queryBuilder, FilterConditionBeginContext fcbc) {
    LogManager.logTrace(LogConstants.CTX_CONNECTOR, "Parsing IsNull criteria."); // $NON-NLS-1$

    Expression exp = obj.getExpression();
    Column c = ((ColumnReference) exp).getMetadataObject();

    if (fcbc == null) {
      if (obj.isNegated()) {
        return queryBuilder.not().having(c.getSourceName()).isNull();
      }
      return queryBuilder.having(c.getSourceName()).isNull();
    }
    if (obj.isNegated()) {
      return fcbc.not().having(c.getSourceName()).isNull();
    }

    return fcbc.having(c.getSourceName()).isNull();
  }