Пример #1
0
  /** @return true if all tuples match rowType; otherwise, assert on mismatch */
  private boolean assertRowType() {
    for (List<RexLiteral> tuple : tuples) {
      assert tuple.size() == rowType.getFieldCount();
      for (Pair<RexLiteral, RelDataTypeField> pair : Pair.zip(tuple, rowType.getFieldList())) {
        RexLiteral literal = pair.left;
        RelDataType fieldType = pair.right.getType();

        // TODO jvs 19-Feb-2006: strengthen this a bit.  For example,
        // overflow, rounding, and padding/truncation must already have
        // been dealt with.
        if (!RexLiteral.isNullLiteral(literal)) {
          assert (SqlTypeUtil.canAssignFrom(fieldType, literal.getType()));
        }
      }
    }
    return true;
  }
Пример #2
0
 /**
  * Returns whether a node represents the NULL value or a series of nested CAST(NULL as <TYPE>)
  * calls<br>
  * For Example:<br>
  * isNull(CAST(CAST(NULL as INTEGER) AS VARCHAR(1))) returns true
  */
 public static boolean isNull(RexNode node) {
   /* Checks to see if the RexNode is null */
   return RexLiteral.isNullLiteral(node)
       || ((node.getKind() == RexKind.Cast) && isNull(((RexCall) node).operands[0]));
 }