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From "Bryan Pendleton (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (DERBY-6884) SYSCS_IMPORT_TABLE_LOBS_FROM_EXTFILE can't import more than Integer.MAX_VALUE bytes of blob data
Date Sun, 01 May 2016 03:48:12 GMT

     [ https://issues.apache.org/jira/browse/DERBY-6884?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Bryan Pendleton updated DERBY-6884:
-----------------------------------
    Attachment: testForLargeDataSuite.diff

I've moved the test cases to their own test program, so that
they won't be run by the regular test suites, but can still be
run as desired.

Just as Knut Anders predicted, with 'trivial.diff' applied, the
behavior of the CLOB test case changes from the integer
parse error to a "Negative seek offset" error, due to casting
the value from a long to an int producing a negative value.

I'll try turning my attention to that detail later; for now I just
wanted to record the progress I'd made.

A snip from the stack trace is below.

Caused by: java.io.IOException: Negative seek offset
        at java.io.RandomAccessFile.seek(RandomAccessFile.java:555)
        at org.apache.derby.impl.load.ImportFileInputStream.seek(ImportLobFile.java:266)
        at org.apache.derby.impl.load.ImportLobFile.getString(ImportLobFile.java:132)
        at org.apache.derby.impl.load.ImportReadData.getClobColumnFromExtFileAsString(ImportReadData.java:959)


> SYSCS_IMPORT_TABLE_LOBS_FROM_EXTFILE can't import more than Integer.MAX_VALUE bytes of
blob data
> ------------------------------------------------------------------------------------------------
>
>                 Key: DERBY-6884
>                 URL: https://issues.apache.org/jira/browse/DERBY-6884
>             Project: Derby
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 10.11.1.1
>            Reporter: Edward Howe
>         Attachments: DerbyIssue.java, firstTryAtTest.diff, testForLargeDataSuite.diff,
trivial.diff
>
>
> Using SYSCS_EXPORT_TABLE_LOBS_TO_EXTFILE to export a table containing a blob column,
SYSCS_IMPORT_TABLE_LOBS_FROM_EXTFILE  will fail with a NumberFormatException if the offset
for a blob record is > Integer.MAX_VALUE.  This is because ImportReadData.initExternalLobFile()
is parsing the offset as an Integer.
> The stack trace and a program to reproduce are below.
> java.lang.NumberFormatException: For input string: "2147483770"
> 	at java.lang.NumberFormatException.forInputString(NumberFormatException.java:65) ~[na:1.8.0_45]
> 	at java.lang.Integer.parseInt(Integer.java:583) ~[na:1.8.0_45]
> 	at java.lang.Integer.parseInt(Integer.java:615) ~[na:1.8.0_45]
> 	at org.apache.derby.impl.load.ImportReadData.initExternalLobFile(Unknown Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.load.ImportReadData.getBlobColumnFromExtFile(Unknown Source)
~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.load.ImportAbstract.getBlob(Unknown Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.load.Import.getBlob(Unknown Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.iapi.types.SQLBlob.setValueFromResultSet(Unknown Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.sql.execute.VTIResultSet.populateFromResultSet(Unknown Source)
~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.sql.execute.VTIResultSet.getNextRowCore(Unknown Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.sql.execute.ProjectRestrictResultSet.getNextRowCore(Unknown
Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.sql.execute.NormalizeResultSet.getNextRowCore(Unknown Source)
~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.sql.execute.NoPutResultSetImpl.getNextRowFromRowSource(Unknown
Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.store.access.heap.HeapController.load(Unknown Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.store.access.heap.Heap.load(Unknown Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.store.access.RAMTransaction.loadConglomerate(Unknown Source)
~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.store.access.RAMTransaction.recreateAndLoadConglomerate(Unknown
Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.sql.execute.InsertResultSet.bulkInsertCore(Unknown Source)
~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.sql.execute.InsertResultSet.open(Unknown Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.sql.GenericPreparedStatement.executeStmt(Unknown Source) ~[derby-10.11.1.1.jar:na]
> 	at org.apache.derby.impl.sql.GenericPreparedStatement.execute(Unknown Source) ~[derby-10.11.1.1.jar:na]
> 	... 36 common frames omitted
> ==================================
> package blob;
> import java.io.BufferedInputStream;
> import java.io.File;
> import java.io.FileInputStream;
> import java.io.IOException;
> import java.sql.*;
> public final class DerbyIssue {
>     // derby url
>     public static final String DBURL = "jdbc:derby:testdb;create=true";
>     // any random binary file such as a large image or document
>     public static final String BLOB_DATA_FILE = "...";
>     public static final String EXPORT_TABLE_FILE = "table-data";
>     public static final String EXPORT_BLOB_FILE = "blob-data";
>     public static void main(String... args) throws Exception {
>         final DerbyIssue test = new DerbyIssue();
>         test.run();
>     }
>     public void run() throws Exception {
>         Class.forName("org.apache.derby.jdbc.ClientDriver").getConstructor().newInstance();
>         try(final Connection con = DriverManager.getConnection(DBURL)) {
>             try (final Statement stmt = con.createStatement()) {
>                 stmt.execute("CREATE TABLE TESTBLOB(id BIGINT, content BLOB)");
>             }
>             System.out.printf("inserting test data%n");
>             try (final PreparedStatement pstmt = con.prepareStatement("INSERT INTO TESTBLOB
(id, content) VALUES (?, ?)")) {
>                 long id = 1;
>                 long byteCount = 0;
>                 final File content = new File(BLOB_DATA_FILE);
>                 while (byteCount < Integer.MAX_VALUE) {
>                     insertBlob(pstmt, id, content);
>                     id++;
>                     byteCount += content.length();
>                     if (id % 100 == 0) {
>                         System.out.printf("%d%n", byteCount);
>                     }
>                 }
>                 insertBlob(pstmt, id, content);
>                 byteCount += content.length();
>                 System.out.printf("%d bytes written to testblob table%n", byteCount);
>             }
>             final File exportFile = new File(EXPORT_TABLE_FILE);
>             final File blobFile = new File(EXPORT_BLOB_FILE);
>             try (final CallableStatement stmt = con.prepareCall(
>                     "CALL SYSCS_UTIL.SYSCS_EXPORT_TABLE_LOBS_TO_EXTFILE (null, ?, ?,
null, null, null, ?)")) {
>                 stmt.setString(1, "TESTBLOB");
>                 stmt.setString(2, exportFile.toString());
>                 stmt.setString(3, blobFile.toString());
>                 stmt.execute();
>             }
>             System.out.printf("testblob table exported%n");
>             try (final Statement stmt = con.createStatement()) {
>                 stmt.execute("TRUNCATE TABLE TESTBLOB");
>             }
>             System.out.printf("testblob table truncated%n");
>             try (final CallableStatement stmt = con.prepareCall(
>                     "CALL SYSCS_UTIL.SYSCS_IMPORT_TABLE_LOBS_FROM_EXTFILE (null, ?, ?,
null, null, null, 0)")) {
>                 stmt.setString(1, "TESTBLOB");
>                 stmt.setString(2, exportFile.toString());
>                 stmt.execute();
>             }
>             System.out.printf("testblob data imported%n");
>         }
>     }
>     private void insertBlob(PreparedStatement pstmt, long id, File content) throws IOException,
SQLException {
>         try(BufferedInputStream contentStream = new BufferedInputStream(new FileInputStream(content)))
{
>             pstmt.setLong(1, id);
>             pstmt.setBinaryStream(2, contentStream);
>             pstmt.executeUpdate();
>         }
>     }
> }



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