Github user gatorsmile commented on a diff in the pull request:
https://github.com/apache/spark/pull/18869#discussion_r131754182
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/predicates.scala
---
@@ -484,7 +501,20 @@ object Equality {
}
@ExpressionDescription(
- usage = "expr1 _FUNC_ expr2 - Returns true if `expr1` equals `expr2`, or
false otherwise.")
+ usage = "expr1 _FUNC_ expr2 - Returns true if `expr1` equals `expr2`, or
false otherwise.",
+ arguments = """
+ Arguments:
+ * expr1, expr2 - the two expressions must be same type.
--- End diff --
Regarding the type issues, could you check whether this statement is true?
I think we can support different types.
```SQL
SELECT 1 = '1'
```
This will return true.
Also, could you add a test case?
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