Bypass getParameterType by default for PostgreSQL and SQL Server drivers

Closes gh-25679

Author: jhoeller

spring-jdbc/src/main/java/org/springframework/jdbc/core/StatementCreatorUtils.java

@@ -81,12 +81,13 @@ public abstract class StatementCreatorUtils {
 	public static final String IGNORE_GETPARAMETERTYPE_PROPERTY_NAME = "spring.jdbc.getParameterType.ignore";
 
 
-	static boolean shouldIgnoreGetParameterType = SpringProperties.getFlag(IGNORE_GETPARAMETERTYPE_PROPERTY_NAME);
-
 	private static final Log logger = LogFactory.getLog(StatementCreatorUtils.class);
 
 	private static final Map<Class<?>, Integer> javaTypeToSqlTypeMap = new HashMap<>(64);
 
+	@Nullable
+	static Boolean shouldIgnoreGetParameterType;
+
 	static {
 		javaTypeToSqlTypeMap.put(boolean.class, Types.BOOLEAN);
 		javaTypeToSqlTypeMap.put(Boolean.class, Types.BOOLEAN);
@@ -114,6 +115,11 @@ public abstract class StatementCreatorUtils {
 		javaTypeToSqlTypeMap.put(java.sql.Timestamp.class, Types.TIMESTAMP);
 		javaTypeToSqlTypeMap.put(Blob.class, Types.BLOB);
 		javaTypeToSqlTypeMap.put(Clob.class, Types.CLOB);
+
+		String flag = SpringProperties.getProperty(IGNORE_GETPARAMETERTYPE_PROPERTY_NAME);
+		if (flag != null) {
+			shouldIgnoreGetParameterType = Boolean.valueOf(flag);
+		}
 	}
 
 
@@ -250,9 +256,26 @@ private static void setNull(PreparedStatement ps, int paramIndex, int sqlType, @
 			throws SQLException {
 
 		if (sqlType == SqlTypeValue.TYPE_UNKNOWN || (sqlType == Types.OTHER && typeName == null)) {
+			boolean callGetParameterType = false;
 			boolean useSetObject = false;
 			Integer sqlTypeToUse = null;
-			if (!shouldIgnoreGetParameterType) {
+			if (shouldIgnoreGetParameterType != null) {
+				callGetParameterType = !shouldIgnoreGetParameterType;
+			}
+			else {
+				String jdbcDriverName = ps.getConnection().getMetaData().getDriverName();
+				if (jdbcDriverName.startsWith("PostgreSQL")) {
+					sqlTypeToUse = Types.NULL;
+				}
+				else if (jdbcDriverName.startsWith("Microsoft") && jdbcDriverName.contains("SQL Server")) {
+					sqlTypeToUse = Types.NULL;
+					useSetObject = true;
+				}
+				else {
+					callGetParameterType = true;
+				}
+			}
+			if (callGetParameterType) {
 				try {
 					sqlTypeToUse = ps.getParameterMetaData().getParameterType(paramIndex);
 				}