fix some typos

datafusion/CHANGELOG.md

@@ -191,7 +191,7 @@
 - fix string coercion missing in Eq/NotEq operator [\#2258](https://github.com/apache/arrow-datafusion/pull/2258) ([WinkerDu](https://github.com/WinkerDu))
 - Update to Arrow 12.0.0, update tonic and prost [\#2253](https://github.com/apache/arrow-datafusion/pull/2253) ([alamb](https://github.com/alamb))
 - minor: move field\_util from `physical-expr` crate to `expr` crate [\#2250](https://github.com/apache/arrow-datafusion/pull/2250) ([andygrove](https://github.com/andygrove))
-- Move identifer case tests to `sql_integ`, add negative cases, Debug for `DataFrame` [\#2243](https://github.com/apache/arrow-datafusion/pull/2243) ([alamb](https://github.com/alamb))
+- Move identifier case tests to `sql_integ`, add negative cases, Debug for `DataFrame` [\#2243](https://github.com/apache/arrow-datafusion/pull/2243) ([alamb](https://github.com/alamb))
 - Implement sort-merge join [\#2242](https://github.com/apache/arrow-datafusion/pull/2242) ([richox](https://github.com/richox))
 - fix: find the right wider decimal datatype for comparison operation [\#2241](https://github.com/apache/arrow-datafusion/pull/2241) ([liukun4515](https://github.com/liukun4515))
 - Fix join without constraints [\#2240](https://github.com/apache/arrow-datafusion/pull/2240) ([Dandandan](https://github.com/Dandandan))

datafusion/core/src/sql/planner.rs

@@ -1681,7 +1681,7 @@ impl<'a, S: ContextProvider> SqlToRel<'a, S> {
                 } else {
                     // Don't use `col()` here because it will try to
                     // interpret names with '.' as if they were
-                    // compound indenfiers, but this is not a compound
+                    // compound identifiers, but this is not a compound
                     // identifier. (e.g. it is "foo.bar" not foo.bar)
                     Ok(Expr::Column(Column {
                         relation: None,

datafusion/core/src/sql/utils.rs

@@ -471,7 +471,7 @@ pub(crate) fn make_decimal_type(
     }
 }
 
-// Normalize an identifer to a lowercase string unless the identifier is quoted.
+// Normalize an identifier to a lowercase string unless the identifier is quoted.
 pub(crate) fn normalize_ident(id: &Ident) -> String {
     match id.quote_style {
         Some(_) => id.value.clone(),