Revise documentation notes on getParameterType performance issues

See gh-25679

Author: jhoeller

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

@@ -66,12 +66,11 @@ public abstract class StatementCreatorUtils {
 	 * completely, i.e. to never even attempt to retrieve {@link PreparedStatement#getParameterMetaData()}
 	 * for {@link StatementCreatorUtils#setNull} calls.
 	 * <p>The default is "false", trying {@code getParameterType} calls first and falling back to
-	 * {@link PreparedStatement#setNull} / {@link PreparedStatement#setObject} calls based on well-known
-	 * behavior of common databases. Spring records JDBC drivers with non-working {@code getParameterType}
-	 * implementations and won't attempt to call that method for that driver again, always falling back.
-	 * <p>Consider switching this flag to "true" if you experience misbehavior at runtime, e.g. with
-	 * a connection pool setting back the {@link PreparedStatement} instance in case of an exception
-	 * thrown from {@code getParameterType} (as reported on JBoss AS 7).
+	 * {@link PreparedStatement#setNull} / {@link PreparedStatement#setObject} calls based on
+	 * well-known behavior of common databases.
+	 * <p>Consider switching this flag to "true" if you experience misbehavior at runtime,
+	 * e.g. with connection pool issues in case of an exception thrown from {@code getParameterType}
+	 * (as reported on JBoss AS 7) or in case of performance problems (as reported on PostgreSQL).
 	 */
 	public static final String IGNORE_GETPARAMETERTYPE_PROPERTY_NAME = "spring.jdbc.getParameterType.ignore";
 
@@ -266,7 +265,7 @@ private static void setNull(PreparedStatement ps, int paramIndex, int sqlType, @
 				}
 				else if (databaseProductName.startsWith("DB2") ||
 						jdbcDriverName.startsWith("jConnect") ||
-						jdbcDriverName.startsWith("SQLServer")||
+						jdbcDriverName.startsWith("SQLServer") ||
 						jdbcDriverName.startsWith("Apache Derby")) {
 					sqlTypeToUse = Types.VARCHAR;
 				}

src/docs/asciidoc/data-access.adoc

@@ -3379,7 +3379,7 @@ While this usually works well, there is a potential for issues, e.g. with Map-co
 case which may be expensive with your JDBC driver. Please make sure to use a recent driver
 version, and consider setting the "spring.jdbc.getParameterType.ignore" property to "true"
 (as a JVM system property or in a `spring.properties` file in the root of your classpath)
-if you encounter a performance issue, e.g. as reported on Oracle 12c (SPR-16139).
+if you encounter a performance issue (as reported on Oracle 12c, JBoss and PostgreSQL).
 
 Alternatively, simply consider specifying the corresponding JDBC types explicitly:
 either via a 'BatchPreparedStatementSetter' as shown above, or via an explicit type