/** @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;
}
private static boolean canConvert(RelDataType fromType, RelDataType toType) {
return SqlTypeUtil.canAssignFrom(toType, fromType);
}