zhuqi-lucas commented on code in PR #14572:
URL: https://github.com/apache/datafusion/pull/14572#discussion_r1952860229
##########
datafusion/common/src/dfschema.rs:
##########
@@ -1028,21 +1028,41 @@ impl SchemaExt for Schema {
})
}
- fn logically_equivalent_names_and_types(&self, other: &Self) -> bool {
+ fn logically_equivalent_names_and_types(&self, other: &Self) -> Result<()>
{
if self.fields().len() != other.fields().len() {
- return false;
+ _plan_err!(
+ "Inserting query must have the same schema length as the
table. \
+ Expected table schema length: {}, got: {}",
+ self.fields().len(),
+ other.fields().len()
+ )
+ } else {
+ self.fields()
+ .iter()
+ .zip(other.fields().iter())
+ .try_for_each(|(f1, f2)| {
+ // only check the case when the table field is not
nullable and the insert data field is nullable
+ if !f1.is_nullable() && f2.is_nullable() {
Review Comment:
Thanks @jonahgao , got it now, this is a good example to explain.
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