feat(EXPB-4894): Avoid caseinsensitive lookup of tables in case of mismatch

Author: kramerul

core/src/main/java/org/apache/calcite/sql/validate/IdentifierNamespace.java

@@ -142,7 +142,7 @@ private SqlValidatorNamespace resolveImpl(SqlIdentifier id) {
 
     // Failed to match.  If we're matching case-sensitively, try a more
     // lenient match. If we find something we can offer a helpful hint.
-    if (nameMatcher.isCaseSensitive()) {
+    if (nameMatcher.isCaseSensitive() && validator.config().offerNotFoundHint()) {
       final SqlNameMatcher liberalMatcher = SqlNameMatchers.liberal();
       resolved.clear();
       parentScope.resolveTable(names, liberalMatcher,

core/src/main/java/org/apache/calcite/sql/validate/SqlValidator.java

@@ -889,6 +889,12 @@ interface Config {
      */
     Config withIdentifierExpansion(boolean expand);
 
+    @Value.Default default boolean offerNotFoundHint() {
+      return true;
+    }
+
+    Config withOfferNotFoundHint(boolean expand);
+
     /**
      * Returns whether to treat the query being validated as embedded
      * (as opposed to top-level).