// Keep merging one by one just to check if there is
// any problem with types in strict mode
Schema tmpSchema = inputs.get(0).getSchema() ;
for (int i=1; i< inputs.size() ;i++) {
// Assume the first input's aliases take precedance
tmpSchema = tmpSchema.merge(inputs.get(i).getSchema(), false) ;
// if they cannot be merged, we just give up
if (tmpSchema == null) {
int errCode = 1054;
String msg = "Cannot merge schemas from inputs of UNION" ;