alamb commented on code in PR #4149:
URL: https://github.com/apache/arrow-datafusion/pull/4149#discussion_r1020749024
##########
datafusion/optimizer/src/unwrap_cast_in_comparison.rs:
##########
@@ -292,6 +296,25 @@ fn is_support_data_type(data_type: &DataType) -> bool {
)
}
+fn is_decimal_type(dt: &DataType) -> bool {
+ matches!(dt, DataType::Decimal128(_, _))
+}
+
+fn is_unsigned_type(dt: &DataType) -> bool {
+ matches!(
+ dt,
+ DataType::UInt8 | DataType::UInt16 | DataType::UInt32 |
DataType::UInt64
+ )
+}
+
+/// Until https://github.com/apache/arrow-rs/issues/1043 is done
+/// (support for unsigned <--> decimal casts) we also don't do that
+/// kind of cast in this optimizer
+fn is_unsupported_cast(dt1: &DataType, dt2: &DataType) -> bool {
Review Comment:
I found this with the test (which failed when it tried to invoke the arrow
cast kernels for decimal <--> unsigned)
##########
datafusion/core/tests/sql/joins.rs:
##########
@@ -1428,9 +1428,9 @@ async fn reduce_left_join_1() -> Result<()> {
"Explain [plan_type:Utf8, plan:Utf8]",
" Projection: t1.t1_id, t1.t1_name, t1.t1_int, t2.t2_id, t2.t2_name,
t2.t2_int [t1_id:UInt32;N, t1_name:Utf8;N, t1_int:UInt32;N, t2_id:UInt32;N,
t2_name:Utf8;N, t2_int:UInt32;N]",
" Inner Join: t1.t1_id = t2.t2_id [t1_id:UInt32;N, t1_name:Utf8;N,
t1_int:UInt32;N, t2_id:UInt32;N, t2_name:Utf8;N, t2_int:UInt32;N]",
- " Filter: CAST(t1.t1_id AS Int64) < Int64(100) [t1_id:UInt32;N,
t1_name:Utf8;N, t1_int:UInt32;N]",
Review Comment:
🎉 the casts have been removed!
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