[PECOBLR-388] added real, numeric, char and bigint support in setObject method (#818)

* added real, numeric, char and long support in setObject method

* updated nextchangelog.md

* added comments

Author: shivam2680

NEXT_CHANGELOG.md

@@ -10,7 +10,7 @@
 - 
 
 ### Fixed
-- 
+- Fix: unsupported data types in `setObject(int,Object,int targetSqlType)` method in PreparedStatement
 
 ---
 *Note: When making changes, please add your change under the appropriate section with a brief description.* 

src/main/java/com/databricks/jdbc/common/util/DatabricksTypeUtil.java

@@ -53,6 +53,7 @@ public class DatabricksTypeUtil {
   public static final String ARRAY = "ARRAY";
   public static final String STRUCT = "STRUCT";
   public static final String VARIANT = "VARIANT";
+  public static final String CHAR = "CHAR";
   private static final ArrayList<ColumnInfoTypeName> SIGNED_TYPES =
       new ArrayList<>(
           Arrays.asList(
@@ -63,10 +64,12 @@ public class DatabricksTypeUtil {
               ColumnInfoTypeName.LONG,
               ColumnInfoTypeName.SHORT));
 
+  // only used for PreparedStatement
   public static ColumnInfoTypeName getColumnInfoType(String typeName) {
     switch (typeName) {
+      case DatabricksTypeUtil.CHAR:
       case DatabricksTypeUtil.STRING:
-        return ColumnInfoTypeName.STRING;
+        return ColumnInfoTypeName.STRING; // both char, string passed as STRING param
       case DatabricksTypeUtil.DATE:
       case DatabricksTypeUtil.TIMESTAMP:
       case DatabricksTypeUtil.TIMESTAMP_NTZ:
@@ -79,6 +82,7 @@ public static ColumnInfoTypeName getColumnInfoType(String typeName) {
       case DatabricksTypeUtil.INT:
         return ColumnInfoTypeName.INT;
       case DatabricksTypeUtil.BIGINT:
+      case DatabricksTypeUtil.LONG:
         return ColumnInfoTypeName.LONG;
       case DatabricksTypeUtil.FLOAT:
         return ColumnInfoTypeName.FLOAT;
@@ -359,6 +363,8 @@ public static Nullable getNullableFromValue(Integer isNullable) {
    */
   public static String getDatabricksTypeFromSQLType(int sqlType) {
     switch (sqlType) {
+      case Types.CHAR:
+        return DatabricksTypeUtil.CHAR;
       case Types.ARRAY:
         return ARRAY;
       case Types.BIGINT:
@@ -370,13 +376,15 @@ public static String getDatabricksTypeFromSQLType(int sqlType) {
       case Types.DATE:
         return DATE;
       case Types.DECIMAL:
-        return DECIMAL;
+      case Types.NUMERIC:
+        return DECIMAL; // Databricks treats NUMERIC as DECIMAL
       case Types.BIT:
       case Types.BOOLEAN:
         return BOOLEAN;
       case Types.DOUBLE:
         return DOUBLE;
       case Types.FLOAT:
+      case Types.REAL: // REAL is float(24)
         return FLOAT;
       case Types.INTEGER:
         return INT;

src/test/java/com/databricks/jdbc/common/util/DatabricksTypeUtilTest.java

@@ -158,6 +158,8 @@ void testGetDatabricksTypeFromSQLType() {
         DatabricksTypeUtil.INT, DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.INTEGER));
     assertEquals(
         DatabricksTypeUtil.STRING, DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.VARCHAR));
+    assertEquals(
+        DatabricksTypeUtil.CHAR, DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.CHAR));
     assertEquals(
         DatabricksTypeUtil.STRING,
         DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.LONGVARCHAR));
@@ -178,6 +180,8 @@ void testGetDatabricksTypeFromSQLType() {
     assertEquals(
         DatabricksTypeUtil.BINARY,
         DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.LONGVARBINARY));
+    assertEquals(
+        DatabricksTypeUtil.DECIMAL, DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.NUMERIC));
     assertEquals(
         DatabricksTypeUtil.DATE, DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.DATE));
     assertEquals(
@@ -188,6 +192,8 @@ void testGetDatabricksTypeFromSQLType() {
         DatabricksTypeUtil.DOUBLE, DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.DOUBLE));
     assertEquals(
         DatabricksTypeUtil.FLOAT, DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.FLOAT));
+    assertEquals(
+        DatabricksTypeUtil.FLOAT, DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.REAL));
     assertEquals(
         DatabricksTypeUtil.TIMESTAMP_NTZ,
         DatabricksTypeUtil.getDatabricksTypeFromSQLType(Types.TIMESTAMP));
@@ -234,6 +240,7 @@ void testInferDatabricksType() {
     "BYTE, BYTE",
     "INT, INT",
     "BIGINT, LONG",
+    "LONG, LONG",
     "FLOAT, FLOAT",
     "DOUBLE, DOUBLE",
     "BINARY, BINARY",
@@ -244,6 +251,7 @@ void testInferDatabricksType() {
     "VOID, NULL",
     "NULL, NULL",
     "MAP, MAP",
+    "CHAR, STRING",
     "UNKNOWN, USER_DEFINED_TYPE"
   })
   public void testGetColumnInfoType(String inputTypeName, String expectedTypeName) {