wangyum commented on a change in pull request #35220:
URL: https://github.com/apache/spark/pull/35220#discussion_r786429857
##########
File path:
sql/core/src/test/resources/sql-tests/results/typeCoercion/native/concat.sql.out
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@@ -40,16 +40,16 @@ FROM (
-- !query schema
struct<col:string>
-- !query output
-prefix_0120.0
-prefix_1231.0
-prefix_2342.0
-prefix_3453.0
-prefix_4564.0
-prefix_5675.0
-prefix_6786.0
-prefix_7897.0
-prefix_89108.0
-prefix_910119.0
+prefix_0120
+prefix_1231
+prefix_2342
+prefix_3453
+prefix_4564
+prefix_5675
+prefix_6786
+prefix_7897
+prefix_89108
+prefix_910119
Review comment:
It seems it is not safe when casting `IntegralType` to `DoubleType`.
```
spark.sql("create table t1(id long) using parquet")
spark.sql("insert into t1 values(1)")
spark.sql("insert into t1 values(92233720368547758L)")
spark.sql("select id, cast(cast(id as double) as string) from
t1").show(false)
```
Before this pr:
```
+-----------------+----------------------------------+
|id |CAST(CAST(id AS DOUBLE) AS STRING)|
+-----------------+----------------------------------+
|92233720368547758|9.223372036854776E16 |
|1 |1.0 |
+-----------------+----------------------------------+
```
After this pr:
```
+-----------------+----------------------------------+
|id |CAST(CAST(id AS DOUBLE) AS STRING)|
+-----------------+----------------------------------+
|1 |1 |
|92233720368547758|92233720368547758 |
+-----------------+----------------------------------+
```
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