Use try-with-resources to manage JDBC Clob in

CSVPrinter.printRecords(ResultSet)

Author: garydgregory

src/changes/changes.xml

@@ -44,13 +44,14 @@
       <!-- ADD -->
       <action issue="CSV-308" type="fix" dev="ggregory" due-to="Buddhi De Silva, Gary Gregory">[Javadoc] Add example to CSVFormat#setHeaderComments() #344.</action>
       <!-- FIX -->
-      <action issue="CSV-306" type="fix" dev="ggregory" due-to="Sam Ng, Bruno P. Kinoshita">Replace deprecated method in user guide, update external link #324, #325.</action>
+      <action type="fix" issue="CSV-306" dev="ggregory" due-to="Sam Ng, Bruno P. Kinoshita">Replace deprecated method in user guide, update external link #324, #325.</action>
       <action type="fix" dev="ggregory" due-to="Seth Falco, Bruno P. Kinoshita">Document duplicate header behavior #309.</action>
       <action type="fix" dev="ggregory" due-to="jkbkupczyk">Add missing docs #328.</action>
       <action type="fix" dev="ggregory" due-to="step-security-bot">[StepSecurity] CI: Harden GitHub Actions #329, #330.</action>
       <action type="fix" issue="CSV-147" dev="ggregory" due-to="Steven Peterson, Benedikt Ritter, Gary Gregory, Joerg Schaible, Buddhi De Silva, Elliotte Rusty Harold">Better error message during faulty CSV record read #347.</action>
       <action type="fix" issue="CSV-310" dev="ggregory" due-to="Buddhi De Silva">Misleading error message when QuoteMode set to None #352.</action>
       <action type="fix" issue="CSV-311" dev="ggregory" due-to="Christian Feuersaenger, Gary Gregory">OutOfMemory for very long rows despite using column value of type Reader.</action>
+      <action type="fix" dev="ggregory" due-to="Gary Gregory">Use try-with-resources to manage JDBC Clob in CSVPrinter.printRecords(ResultSet).</action>
       <!-- UPDATE -->
       <action type="update" dev="ggregory" due-to="Gary Gregory">Bump commons-io:commons-io: from 2.11.0 to 2.15.1.</action>
       <action type="update" dev="ggregory" due-to="Gary Gregory, Dependabot">Bump commons-parent from 57 to 67.</action>

src/main/java/org/apache/commons/csv/CSVPrinter.java

@@ -24,6 +24,7 @@
 import java.io.Closeable;
 import java.io.Flushable;
 import java.io.IOException;
+import java.io.Reader;
 import java.sql.Clob;
 import java.sql.ResultSet;
 import java.sql.SQLException;
@@ -414,8 +415,13 @@ public void printRecords(final ResultSet resultSet) throws SQLException, IOExcep
         while (resultSet.next()) {
             for (int i = 1; i <= columnCount; i++) {
                 final Object object = resultSet.getObject(i);
-                // TODO Who manages the Clob? The JDBC driver or must we close it? Is it driver-dependent?
-                print(object instanceof Clob ? ((Clob) object).getCharacterStream() : object);
+                if (object instanceof Clob) {
+                    try (Reader reader = ((Clob) object).getCharacterStream()) {
+                        print(reader);
+                    }
+                } else {
+                    print(object);
+                }
             }
             println();
         }