Update operand types for percentile approx to allow with addtional type hint

Signed-off-by: Yuanchun Shen <yuanchu@amazon.com>

Author: yuancu

core/src/main/java/org/opensearch/sql/calcite/utils/PPLOperandTypes.java

@@ -117,12 +117,15 @@ private PPLOperandTypes() {}
               (OperandTypes.family(SqlTypeFamily.NUMERIC, SqlTypeFamily.STRING))
                   .or(OperandTypes.family(SqlTypeFamily.STRING, SqlTypeFamily.STRING)));
 
-  public static final UDFOperandMetadata NUMERIC_NUMERIC_OPTIONAL_NUMERIC =
+  public static final UDFOperandMetadata NUMERIC_NUMERIC_OPTIONAL_NUMERIC_SYMBOL =
       UDFOperandMetadata.wrap(
-          (CompositeOperandTypeChecker)
-              OperandTypes.NUMERIC_NUMERIC.or(
+          OperandTypes.family(SqlTypeFamily.NUMERIC, SqlTypeFamily.NUMERIC, SqlTypeFamily.ANY)
+              .or(
                   OperandTypes.family(
-                      SqlTypeFamily.NUMERIC, SqlTypeFamily.NUMERIC, SqlTypeFamily.NUMERIC)));
+                      SqlTypeFamily.NUMERIC,
+                      SqlTypeFamily.NUMERIC,
+                      SqlTypeFamily.NUMERIC,
+                      SqlTypeFamily.ANY)));
   public static final UDFOperandMetadata NUMERIC_NUMERIC_NUMERIC =
       UDFOperandMetadata.wrap(
           OperandTypes.family(SqlTypeFamily.NUMERIC, SqlTypeFamily.NUMERIC, SqlTypeFamily.NUMERIC));

core/src/main/java/org/opensearch/sql/expression/function/PPLBuiltinOperators.java

@@ -465,7 +465,7 @@ public class PPLBuiltinOperators extends ReflectiveSqlOperatorTable {
           PercentileApproxFunction.class,
           "percentile_approx",
           ReturnTypes.ARG0_FORCE_NULLABLE,
-          PPLOperandTypes.NUMERIC_NUMERIC_OPTIONAL_NUMERIC);
+          PPLOperandTypes.NUMERIC_NUMERIC_OPTIONAL_NUMERIC_SYMBOL);
   public static final SqlAggFunction INTERNAL_PATTERN =
       createUserDefinedAggFunction(
           LogPatternAggFunction.class,