Examples with RowLocation org.apache.derby.iapi.types.RowLocation used on opensource projects

Example 6 with RowLocation

use of org.apache.derby.iapi.types.RowLocation in project derby by apache.

the class DataDictionaryImpl method getDescriptorViaIndexMinion.

private <T extends TupleDescriptor> T getDescriptorViaIndexMinion(int indexId, ExecIndexRow keyRow, ScanQualifier[][] scanQualifiers, TabInfoImpl ti, TupleDescriptor parentTupleDescriptor, List<? super T> list, Class<T> returnType, boolean forUpdate, int isolationLevel, TransactionController tc) throws StandardException {
    CatalogRowFactory rf = ti.getCatalogRowFactory();
    ConglomerateController heapCC;
    ExecIndexRow indexRow1;
    ExecRow outRow;
    RowLocation baseRowLocation;
    ScanController scanController;
    T td = null;
    if (SanityManager.DEBUG) {
        SanityManager.ASSERT(isolationLevel == TransactionController.ISOLATION_REPEATABLE_READ || isolationLevel == TransactionController.ISOLATION_READ_UNCOMMITTED);
    }
    outRow = rf.makeEmptyRow();
    heapCC = tc.openConglomerate(ti.getHeapConglomerate(), false, 0, TransactionController.MODE_RECORD, isolationLevel);
    /* Scan the index and go to the data pages for qualifying rows to
		 * build the column descriptor.
		 */
    scanController = tc.openScan(// conglomerate to open
    ti.getIndexConglomerate(indexId), // don't hold open across commit
    false, (forUpdate) ? TransactionController.OPENMODE_FORUPDATE : 0, TransactionController.MODE_RECORD, isolationLevel, // all fields as objects
    (FormatableBitSet) null, // start position - first row
    keyRow.getRowArray(), // startSearchOperation
    ScanController.GE, // scanQualifier,
    scanQualifiers, // stop position - through last row
    keyRow.getRowArray(), // stopSearchOperation
    ScanController.GT);
    while (true) {
        // create an index row template
        indexRow1 = getIndexRowFromHeapRow(ti.getIndexRowGenerator(indexId), heapCC.newRowLocationTemplate(), outRow);
        // from the table.
        if (!scanController.fetchNext(indexRow1.getRowArray())) {
            break;
        }
        baseRowLocation = (RowLocation) indexRow1.getColumn(indexRow1.nColumns());
        // RESOLVE paulat - remove the try catch block when track 3677 is fixed
        // just leave the contents of the try block
        // adding to get more info on track 3677
        boolean base_row_exists = false;
        try {
            base_row_exists = heapCC.fetch(baseRowLocation, outRow.getRowArray(), (FormatableBitSet) null);
        } catch (RuntimeException re) {
            if (SanityManager.DEBUG) {
                if (re instanceof AssertFailure) {
                    StringBuffer strbuf = new StringBuffer("Error retrieving base row in table " + ti.getTableName());
                    strbuf.append(": An ASSERT was thrown when trying to locate a row matching index row " + indexRow1 + " from index " + ti.getIndexName(indexId) + ", conglom number " + ti.getIndexConglomerate(indexId));
                    debugGenerateInfo(strbuf, tc, heapCC, ti, indexId);
                }
            }
            throw re;
        } catch (StandardException se) {
            if (SanityManager.DEBUG) {
                // do not want to catch lock timeout errors here
                if (se.getSQLState().equals("XSRS9")) {
                    StringBuffer strbuf = new StringBuffer("Error retrieving base row in table " + ti.getTableName());
                    strbuf.append(": A StandardException was thrown when trying to locate a row matching index row " + indexRow1 + " from index " + ti.getIndexName(indexId) + ", conglom number " + ti.getIndexConglomerate(indexId));
                    debugGenerateInfo(strbuf, tc, heapCC, ti, indexId);
                }
            }
            throw se;
        }
        if (SanityManager.DEBUG) {
            // holding scan cursor on index at ISOLATION_REPEATABLE_READ.
            if (!base_row_exists && (isolationLevel == TransactionController.ISOLATION_REPEATABLE_READ)) {
                StringBuffer strbuf = new StringBuffer("Error retrieving base row in table " + ti.getTableName());
                strbuf.append(": could not locate a row matching index row " + indexRow1 + " from index " + ti.getIndexName(indexId) + ", conglom number " + ti.getIndexConglomerate(indexId));
                debugGenerateInfo(strbuf, tc, heapCC, ti, indexId);
                // RESOLVE: for now, we are going to kill the VM
                // to help debug this problem.
                System.exit(1);
            // RESOLVE: not currently reached
            // SanityManager.THROWASSERT(strbuf.toString());
            }
        }
        if (!base_row_exists && (isolationLevel == TransactionController.ISOLATION_READ_UNCOMMITTED)) {
            // If isolationLevel == ISOLATION_READ_UNCOMMITTED we may
            // possibly see that the base row does not exist even if the
            // index row did.  This mode is currently only used by
            // TableNameInfo's call to hashAllTableDescriptorsByTableId,
            // cf. DERBY-3678, and by getStatisticsDescriptors,
            // cf. DERBY-4881.
            // 
            // For the former call, a table's schema descriptor is attempted
            // read, and if the base row for the schema has gone between
            // reading the index and the base table, the table that needs
            // this information has gone, too.  So, the table should not
            // be needed for printing lock timeout or deadlock
            // information, so we can safely just return an empty (schema)
            // descriptor. Furthermore, neither Timeout or DeadLock
            // diagnostics access the schema of a table descriptor, so it
            // seems safe to just return an empty schema descriptor for
            // the table.
            // 
            // There is a theoretical chance another row may have taken
            // the first one's place, but only if a compress of the base
            // table managed to run between the time we read the index and
            // the base row, which seems unlikely so we ignore that.
            // 
            // Even the index row may be gone in the above use case, of
            // course, and that case also returns an empty descriptor
            // since no match is found.
            td = null;
        } else {
            // normal case
            td = returnType.cast(rf.buildDescriptor(outRow, parentTupleDescriptor, this));
        }
        /* If list is null, then caller only wants a single descriptor - we're done
			 * else just add the current descriptor to the list.
			 */
        if (list == null) {
            break;
        } else if (td != null) {
            list.add(td);
        }
    }
    scanController.close();
    heapCC.close();
    return td;
}

Example 7 with RowLocation

use of org.apache.derby.iapi.types.RowLocation in project derby by apache.

the class DataDictionaryImpl method getConstraintDescriptorViaIndex.

/**
 * Return a (single or list of) ConstraintDescriptor(s) from
 * SYSCONSTRAINTS where the access is from the index to the heap.
 *
 * @param indexId	The id of the index (0 to # of indexes on table) to use
 * @param keyRow	The supplied ExecIndexRow for search
 * @param ti		The TabInfoImpl to use
 * @param td		The TableDescriptor, if supplied.
 * @param dList		The list to build, if supplied.  If null, then caller expects
 *					a single descriptor
 * @param forUpdate			Whether or not to open scan for update
 *
 * @return	The last matching descriptor
 *
 * @exception StandardException		Thrown on error
 */
protected ConstraintDescriptor getConstraintDescriptorViaIndex(int indexId, ExecIndexRow keyRow, TabInfoImpl ti, TableDescriptor td, ConstraintDescriptorList dList, boolean forUpdate) throws StandardException {
    SYSCONSTRAINTSRowFactory rf = (SYSCONSTRAINTSRowFactory) ti.getCatalogRowFactory();
    ConglomerateController heapCC;
    ConstraintDescriptor cd = null;
    ExecIndexRow indexRow1;
    ExecRow outRow;
    RowLocation baseRowLocation;
    ScanController scanController;
    TransactionController tc;
    // Get the current transaction controller
    tc = getTransactionCompile();
    outRow = rf.makeEmptyRow();
    heapCC = tc.openConglomerate(ti.getHeapConglomerate(), false, 0, TransactionController.MODE_RECORD, TransactionController.ISOLATION_REPEATABLE_READ);
    /* Scan the index and go to the data pages for qualifying rows to
		 * build the column descriptor.
		 */
    scanController = tc.openScan(// conglomerate to open
    ti.getIndexConglomerate(indexId), // don't hold open across commit
    false, (forUpdate) ? TransactionController.OPENMODE_FORUPDATE : 0, TransactionController.MODE_RECORD, TransactionController.ISOLATION_REPEATABLE_READ, // all fields as objects
    (FormatableBitSet) null, // start position - exact key match.
    keyRow.getRowArray(), // startSearchOperation
    ScanController.GE, // scanQualifier,
    null, // stop position - exact key match.
    keyRow.getRowArray(), // stopSearchOperation
    ScanController.GT);
    while (scanController.next()) {
        SubConstraintDescriptor subCD = null;
        // create an index row template
        indexRow1 = getIndexRowFromHeapRow(ti.getIndexRowGenerator(indexId), heapCC.newRowLocationTemplate(), outRow);
        scanController.fetch(indexRow1.getRowArray());
        baseRowLocation = (RowLocation) indexRow1.getColumn(indexRow1.nColumns());
        boolean base_row_exists = heapCC.fetch(baseRowLocation, outRow.getRowArray(), (FormatableBitSet) null);
        if (SanityManager.DEBUG) {
            // it can not be possible for heap row to disappear while
            // holding scan cursor on index at ISOLATION_REPEATABLE_READ.
            SanityManager.ASSERT(base_row_exists, "base row doesn't exist");
        }
        switch(rf.getConstraintType(outRow)) {
            case DataDictionary.PRIMARYKEY_CONSTRAINT:
            case DataDictionary.FOREIGNKEY_CONSTRAINT:
            case DataDictionary.UNIQUE_CONSTRAINT:
                subCD = getSubKeyConstraint(rf.getConstraintId(outRow), rf.getConstraintType(outRow));
                break;
            case DataDictionary.CHECK_CONSTRAINT:
                subCD = getSubCheckConstraint(rf.getConstraintId(outRow));
                break;
            default:
                if (SanityManager.DEBUG) {
                    SanityManager.THROWASSERT("unexpected value " + "from rf.getConstraintType(outRow)" + rf.getConstraintType(outRow));
                }
        }
        if (SanityManager.DEBUG) {
            SanityManager.ASSERT(subCD != null, "subCD is expected to be non-null");
        }
        /* Cache the TD in the SCD so that
			 * the row factory doesn't need to go
			 * out to disk to get it.
			 */
        subCD.setTableDescriptor(td);
        cd = (ConstraintDescriptor) rf.buildDescriptor(outRow, subCD, this);
        /* If dList is null, then caller only wants a single descriptor - we're done
			 * else just add the current descriptor to the list.
			 */
        if (dList == null) {
            break;
        } else {
            dList.add(cd);
        }
    }
    scanController.close();
    heapCC.close();
    return cd;
}

Example 8 with RowLocation

use of org.apache.derby.iapi.types.RowLocation in project derby by apache.

the class TabInfoImpl method updateRow.

/**
 * Updates a set of base rows in a catalog with the same key on an index
 * and updates all the corresponding index rows.
 *
 *	@param	key			key row
 *	@param	newRows		new version of the array of rows
 *	@param	indexNumber	index that key operates
 *	@param	indicesToUpdate	array of booleans, one for each index on the catalog.
 *							if a boolean is true, that means we must update the
 *							corresponding index because changes in the newRow
 *							affect it.
 *	@param  colsToUpdate	array of ints indicating which columns (1 based)
 *							to update.  If null, do all.
 *	@param	tc			transaction controller
 *
 * @exception StandardException		Thrown on failure
 */
void updateRow(ExecIndexRow key, ExecRow[] newRows, int indexNumber, boolean[] indicesToUpdate, int[] colsToUpdate, TransactionController tc) throws StandardException {
    ConglomerateController heapCC;
    ScanController drivingScan;
    ExecIndexRow drivingIndexRow;
    RowLocation baseRowLocation;
    ExecRow baseRow = crf.makeEmptyRow();
    if (SanityManager.DEBUG) {
        SanityManager.ASSERT(indicesToUpdate.length == crf.getNumIndexes(), "Wrong number of indices.");
    }
    RowChanger rc = getRowChanger(tc, colsToUpdate, baseRow);
    // Row level locking
    rc.openForUpdate(indicesToUpdate, TransactionController.MODE_RECORD, true);
    /* Open the heap conglomerate */
    heapCC = tc.openConglomerate(getHeapConglomerate(), false, TransactionController.OPENMODE_FORUPDATE, TransactionController.MODE_RECORD, TransactionController.ISOLATION_REPEATABLE_READ);
    drivingScan = tc.openScan(// conglomerate to open
    getIndexConglomerate(indexNumber), // don't hold open across commit
    false, TransactionController.OPENMODE_FORUPDATE, TransactionController.MODE_RECORD, TransactionController.ISOLATION_REPEATABLE_READ, // all fields as objects
    (FormatableBitSet) null, // start position - first row
    key.getRowArray(), // startSearchOperation
    ScanController.GE, // scanQualifier
    null, // stop position - through last row
    key.getRowArray(), // stopSearchOperation
    ScanController.GT);
    // Get an index row based on the base row
    drivingIndexRow = getIndexRowFromHeapRow(getIndexRowGenerator(indexNumber), heapCC.newRowLocationTemplate(), crf.makeEmptyRow());
    int rowNum = 0;
    while (drivingScan.fetchNext(drivingIndexRow.getRowArray())) {
        baseRowLocation = (RowLocation) drivingIndexRow.getColumn(drivingIndexRow.nColumns());
        boolean base_row_exists = heapCC.fetch(baseRowLocation, baseRow.getRowArray(), (FormatableBitSet) null);
        if (SanityManager.DEBUG) {
            // it can not be possible for heap row to disappear while
            // holding scan cursor on index at ISOLATION_REPEATABLE_READ.
            SanityManager.ASSERT(base_row_exists, "base row not found");
        }
        rc.updateRow(baseRow, (rowNum == newRows.length - 1) ? newRows[rowNum] : newRows[rowNum++], baseRowLocation);
    }
    rc.finish();
    heapCC.close();
    drivingScan.close();
    rc.close();
}

Example 9 with RowLocation

use of org.apache.derby.iapi.types.RowLocation in project derby by apache.

the class TabInfoImpl method insertRowListImpl.

/**
 *	  Insert logic to insert a list of rows into a table. This logic has two
 *	  odd features.
 *
 *	  <OL>
 *	  <LI>Returns an indication if any returned row was a duplicate.
 *	  <LI>Returns the RowLocation of the last row inserted.
 *	  </OL>
 *	  @param rowList the list of rows to insert
 *	  @param tc	transaction controller
 *	  @param rowLocationOut on output rowLocationOut[0] is set to the
 *	         last RowLocation inserted.
 *	  @return row number (&gt;= 0) if duplicate row inserted into an index
 *	  			ROWNOTDUPLICATE otherwise
 */
private int insertRowListImpl(ExecRow[] rowList, TransactionController tc, RowLocation[] rowLocationOut) throws StandardException {
    ConglomerateController heapController;
    RowLocation heapLocation;
    ExecIndexRow indexableRow;
    int insertRetCode;
    int retCode = ROWNOTDUPLICATE;
    int indexCount = crf.getNumIndexes();
    ConglomerateController[] indexControllers = new ConglomerateController[indexCount];
    // Open the conglomerates
    heapController = tc.openConglomerate(getHeapConglomerate(), false, TransactionController.OPENMODE_FORUPDATE, TransactionController.MODE_RECORD, TransactionController.ISOLATION_REPEATABLE_READ);
    for (int ictr = 0; ictr < indexCount; ictr++) {
        long conglomNumber = getIndexConglomerate(ictr);
        if (conglomNumber > -1) {
            indexControllers[ictr] = tc.openConglomerate(conglomNumber, false, TransactionController.OPENMODE_FORUPDATE, TransactionController.MODE_RECORD, TransactionController.ISOLATION_REPEATABLE_READ);
        }
    }
    heapLocation = heapController.newRowLocationTemplate();
    rowLocationOut[0] = heapLocation;
    // loop through rows on this list, inserting them into system table
    for (int rowNumber = 0; rowNumber < rowList.length; rowNumber++) {
        ExecRow row = rowList[rowNumber];
        // insert the base row and get its new location
        heapController.insertAndFetchLocation(row.getRowArray(), heapLocation);
        for (int ictr = 0; ictr < indexCount; ictr++) {
            if (indexControllers[ictr] == null) {
                continue;
            }
            // Get an index row based on the base row
            indexableRow = getIndexRowFromHeapRow(getIndexRowGenerator(ictr), heapLocation, row);
            insertRetCode = indexControllers[ictr].insert(indexableRow.getRowArray());
            if (insertRetCode == ConglomerateController.ROWISDUPLICATE) {
                retCode = rowNumber;
            }
        }
    }
    // Close the open conglomerates
    for (int ictr = 0; ictr < indexCount; ictr++) {
        if (indexControllers[ictr] == null) {
            continue;
        }
        indexControllers[ictr].close();
    }
    heapController.close();
    return retCode;
}

Example 10 with RowLocation

use of org.apache.derby.iapi.types.RowLocation in project derby by apache.

the class TabInfoImpl method getRowInternal.

/**
 * @exception StandardException		Thrown on failure
 */
private ExecRow getRowInternal(TransactionController tc, ConglomerateController heapCC, ExecIndexRow key, int indexNumber, RowLocation[] rl) throws StandardException {
    ScanController drivingScan;
    ExecIndexRow drivingIndexRow;
    RowLocation baseRowLocation;
    ExecRow baseRow = crf.makeEmptyRow();
    drivingScan = tc.openScan(getIndexConglomerate(indexNumber), // don't hold open across commit
    false, // open for read
    0, TransactionController.MODE_RECORD, TransactionController.ISOLATION_REPEATABLE_READ, // all fields as objects
    (FormatableBitSet) null, // start position - first row
    key.getRowArray(), // startSearchOperation
    ScanController.GE, // scanQualifier
    null, // stop position - through last row
    key.getRowArray(), // stopSearchOperation
    ScanController.GT);
    // Get an index row based on the base row
    drivingIndexRow = getIndexRowFromHeapRow(getIndexRowGenerator(indexNumber), heapCC.newRowLocationTemplate(), crf.makeEmptyRow());
    try {
        if (drivingScan.fetchNext(drivingIndexRow.getRowArray())) {
            rl[0] = baseRowLocation = (RowLocation) drivingIndexRow.getColumn(drivingIndexRow.nColumns());
            boolean base_row_exists = heapCC.fetch(baseRowLocation, baseRow.getRowArray(), (FormatableBitSet) null);
            if (SanityManager.DEBUG) {
                // it can not be possible for heap row to disappear while
                // holding scan cursor on index at ISOLATION_REPEATABLE_READ.
                SanityManager.ASSERT(base_row_exists, "base row not found");
            }
            return baseRow;
        } else {
            return null;
        }
    } finally {
        drivingScan.close();
    }
}