Examples with ColumnDescriptorList org.apache.derby.iapi.sql.dictionary.ColumnDescriptorList used on opensource projects

Example 1 with ColumnDescriptorList

use of org.apache.derby.iapi.sql.dictionary.ColumnDescriptorList in project derby by apache.

the class ConsistencyChecker method checkTable.

/**
 * Check the named table, ensuring that all of its indexes are consistent
 * with the base table.
 * Use this
 *  method only within an SQL-J statement; do not call it directly.
 * <P>When tables are consistent, the method returns true. Otherwise, the method throws an exception.
 * <p>To check the consistency of a single table:
 * <p><code>
 * VALUES ConsistencyChecker::checkTable(<i>SchemaName</i>, <i>TableName</i>)</code></p>
 * <P>For example, to check the consistency of the table <i>APP.Flights</i>:
 * <p><code>
 * VALUES ConsistencyChecker::checkTable('APP', 'FLIGHTS')</code></p>
 * <p>To check the consistency of all of the tables in the 'APP' schema,
 * stopping at the first failure:
 *
 * <P><code>SELECT tablename, ConsistencyChecker::checkTable(<br>
 * 'APP', tablename)<br>
 * FROM sys.sysschemas s, sys.systables t
 * WHERE s.schemaname = 'APP' AND s.schemaid = t.schemaid</code>
 *
 * <p> To check the consistency of an entire database, stopping at the first failure:
 *
 * <p><code>SELECT schemaname, tablename,<br>
 * ConsistencyChecker::checkTable(schemaname, tablename)<br>
 * FROM sys.sysschemas s, sys.systables t<br>
 * WHERE s.schemaid = t.schemaid</code>
 *
 * @param schemaName	The schema name of the table.
 * @param tableName		The name of the table
 *
 * @return	true, if the table is consistent, exception thrown if inconsistent
 *
 * @exception	SQLException	Thrown if some inconsistency
 *									is found, or if some unexpected
 *									exception is thrown..
 */
public static boolean checkTable(String schemaName, String tableName) throws SQLException {
    DataDictionary dd;
    TableDescriptor td;
    long baseRowCount = -1;
    TransactionController tc;
    ConglomerateDescriptor heapCD;
    ConglomerateDescriptor indexCD;
    ExecRow baseRow;
    ExecRow indexRow;
    RowLocation rl = null;
    RowLocation scanRL = null;
    ScanController scan = null;
    int[] baseColumnPositions;
    int baseColumns = 0;
    DataValueFactory dvf;
    long indexRows;
    ConglomerateController baseCC = null;
    ConglomerateController indexCC = null;
    SchemaDescriptor sd;
    ConstraintDescriptor constraintDesc;
    LanguageConnectionContext lcc = ConnectionUtil.getCurrentLCC();
    tc = lcc.getTransactionExecute();
    try {
        // make sure that application code doesn't bypass security checks
        // by calling this public entry point
        SecurityUtil.authorize(Securable.CHECK_TABLE);
        dd = lcc.getDataDictionary();
        dvf = lcc.getDataValueFactory();
        ExecutionFactory ef = lcc.getLanguageConnectionFactory().getExecutionFactory();
        sd = dd.getSchemaDescriptor(schemaName, tc, true);
        td = dd.getTableDescriptor(tableName, sd, tc);
        if (td == null) {
            throw StandardException.newException(SQLState.LANG_TABLE_NOT_FOUND, schemaName + "." + tableName);
        }
        /* Skip views */
        if (td.getTableType() == TableDescriptor.VIEW_TYPE) {
            return true;
        }
        /* Open the heap for reading */
        baseCC = tc.openConglomerate(td.getHeapConglomerateId(), false, 0, TransactionController.MODE_TABLE, TransactionController.ISOLATION_SERIALIZABLE);
        /* Check the consistency of the heap */
        baseCC.checkConsistency();
        heapCD = td.getConglomerateDescriptor(td.getHeapConglomerateId());
        /* Get a row template for the base table */
        baseRow = ef.getValueRow(td.getNumberOfColumns());
        /* Fill the row with nulls of the correct type */
        ColumnDescriptorList cdl = td.getColumnDescriptorList();
        int cdlSize = cdl.size();
        for (int index = 0; index < cdlSize; index++) {
            ColumnDescriptor cd = (ColumnDescriptor) cdl.elementAt(index);
            baseRow.setColumn(cd.getPosition(), cd.getType().getNull());
        }
        /* Look at all the indexes on the table */
        ConglomerateDescriptor[] cds = td.getConglomerateDescriptors();
        for (int index = 0; index < cds.length; index++) {
            indexCD = cds[index];
            /* Skip the heap */
            if (!indexCD.isIndex())
                continue;
            /* Check the internal consistency of the index */
            indexCC = tc.openConglomerate(indexCD.getConglomerateNumber(), false, 0, TransactionController.MODE_TABLE, TransactionController.ISOLATION_SERIALIZABLE);
            indexCC.checkConsistency();
            indexCC.close();
            indexCC = null;
            if (indexCD.isConstraint()) {
                constraintDesc = dd.getConstraintDescriptor(td, indexCD.getUUID());
                if (constraintDesc == null) {
                    throw StandardException.newException(SQLState.LANG_OBJECT_NOT_FOUND, "CONSTRAINT for INDEX", indexCD.getConglomerateName());
                }
            }
            /*
				** Set the base row count when we get to the first index.
				** We do this here, rather than outside the index loop, so
				** we won't do the work of counting the rows in the base table
				** if there are no indexes to check.
				*/
            if (baseRowCount < 0) {
                scan = tc.openScan(heapCD.getConglomerateNumber(), // hold
                false, // not forUpdate
                0, TransactionController.MODE_TABLE, TransactionController.ISOLATION_SERIALIZABLE, RowUtil.EMPTY_ROW_BITSET, // startKeyValue
                null, // not used with null start posn.
                0, // qualifier
                null, // stopKeyValue
                null, // not used with null stop posn.
                0);
                /* Also, get the row location template for index rows */
                rl = scan.newRowLocationTemplate();
                scanRL = scan.newRowLocationTemplate();
                for (baseRowCount = 0; scan.next(); baseRowCount++) ;
                /* Empty statement */
                scan.close();
                scan = null;
            }
            baseColumnPositions = indexCD.getIndexDescriptor().baseColumnPositions();
            baseColumns = baseColumnPositions.length;
            FormatableBitSet indexColsBitSet = new FormatableBitSet();
            for (int i = 0; i < baseColumns; i++) {
                indexColsBitSet.grow(baseColumnPositions[i]);
                indexColsBitSet.set(baseColumnPositions[i] - 1);
            }
            /* Get one row template for the index scan, and one for the fetch */
            indexRow = ef.getValueRow(baseColumns + 1);
            /* Fill the row with nulls of the correct type */
            for (int column = 0; column < baseColumns; column++) {
                /* Column positions in the data dictionary are one-based */
                ColumnDescriptor cd = td.getColumnDescriptor(baseColumnPositions[column]);
                indexRow.setColumn(column + 1, cd.getType().getNull());
            }
            /* Set the row location in the last column of the index row */
            indexRow.setColumn(baseColumns + 1, rl);
            /* Do a full scan of the index */
            scan = tc.openScan(indexCD.getConglomerateNumber(), // hold
            false, // not forUpdate
            0, TransactionController.MODE_TABLE, TransactionController.ISOLATION_SERIALIZABLE, (FormatableBitSet) null, // startKeyValue
            null, // not used with null start posn.
            0, // qualifier
            null, // stopKeyValue
            null, // not used with null stop posn.
            0);
            DataValueDescriptor[] baseRowIndexOrder = new DataValueDescriptor[baseColumns];
            DataValueDescriptor[] baseObjectArray = baseRow.getRowArray();
            for (int i = 0; i < baseColumns; i++) {
                baseRowIndexOrder[i] = baseObjectArray[baseColumnPositions[i] - 1];
            }
            /* Get the index rows and count them */
            for (indexRows = 0; scan.fetchNext(indexRow.getRowArray()); indexRows++) {
                /*
					** Get the base row using the RowLocation in the index row,
					** which is in the last column.  
					*/
                RowLocation baseRL = (RowLocation) indexRow.getColumn(baseColumns + 1);
                boolean base_row_exists = baseCC.fetch(baseRL, baseObjectArray, indexColsBitSet);
                /* Throw exception if fetch() returns false */
                if (!base_row_exists) {
                    String indexName = indexCD.getConglomerateName();
                    throw StandardException.newException(SQLState.LANG_INCONSISTENT_ROW_LOCATION, (schemaName + "." + tableName), indexName, baseRL.toString(), indexRow.toString());
                }
                /* Compare all the column values */
                for (int column = 0; column < baseColumns; column++) {
                    DataValueDescriptor indexColumn = indexRow.getColumn(column + 1);
                    DataValueDescriptor baseColumn = baseRowIndexOrder[column];
                    /*
						** With this form of compare(), null is considered equal
						** to null.
						*/
                    if (indexColumn.compare(baseColumn) != 0) {
                        ColumnDescriptor cd = td.getColumnDescriptor(baseColumnPositions[column]);
                        throw StandardException.newException(SQLState.LANG_INDEX_COLUMN_NOT_EQUAL, indexCD.getConglomerateName(), td.getSchemaName(), td.getName(), baseRL.toString(), cd.getColumnName(), indexColumn.toString(), baseColumn.toString(), indexRow.toString());
                    }
                }
            }
            /* Clean up after the index scan */
            scan.close();
            scan = null;
            /*
				** The index is supposed to have the same number of rows as the
				** base conglomerate.
				*/
            if (indexRows != baseRowCount) {
                throw StandardException.newException(SQLState.LANG_INDEX_ROW_COUNT_MISMATCH, indexCD.getConglomerateName(), td.getSchemaName(), td.getName(), Long.toString(indexRows), Long.toString(baseRowCount));
            }
        }
        /* check that all constraints have backing index */
        ConstraintDescriptorList constraintDescList = dd.getConstraintDescriptors(td);
        for (int index = 0; index < constraintDescList.size(); index++) {
            constraintDesc = constraintDescList.elementAt(index);
            if (constraintDesc.hasBackingIndex()) {
                ConglomerateDescriptor conglomDesc;
                conglomDesc = td.getConglomerateDescriptor(constraintDesc.getConglomerateId());
                if (conglomDesc == null) {
                    throw StandardException.newException(SQLState.LANG_OBJECT_NOT_FOUND, "INDEX for CONSTRAINT", constraintDesc.getConstraintName());
                }
            }
        }
    } catch (StandardException se) {
        throw PublicAPI.wrapStandardException(se);
    } finally {
        try {
            /* Clean up before we leave */
            if (baseCC != null) {
                baseCC.close();
                baseCC = null;
            }
            if (indexCC != null) {
                indexCC.close();
                indexCC = null;
            }
            if (scan != null) {
                scan.close();
                scan = null;
            }
        } catch (StandardException se) {
            throw PublicAPI.wrapStandardException(se);
        }
    }
    return true;
}

Example 2 with ColumnDescriptorList

use of org.apache.derby.iapi.sql.dictionary.ColumnDescriptorList in project derby by apache.

the class DataDictionaryImpl method addSystemTableToDictionary.

/**
 *		Add the required entries to the data dictionary for a System table.
 */
private void addSystemTableToDictionary(TabInfoImpl ti, SchemaDescriptor sd, TransactionController tc, DataDescriptorGenerator ddg) throws StandardException {
    CatalogRowFactory crf = ti.getCatalogRowFactory();
    String name = ti.getTableName();
    long conglomId = ti.getHeapConglomerate();
    SystemColumn[] columnList = crf.buildColumnList();
    UUID heapUUID = crf.getCanonicalHeapUUID();
    String heapName = crf.getCanonicalHeapName();
    TableDescriptor td;
    UUID toid;
    int columnCount;
    SystemColumn column;
    // add table to the data dictionary
    columnCount = columnList.length;
    td = ddg.newTableDescriptor(name, sd, TableDescriptor.SYSTEM_TABLE_TYPE, TableDescriptor.ROW_LOCK_GRANULARITY);
    td.setUUID(crf.getCanonicalTableUUID());
    addDescriptor(td, sd, SYSTABLES_CATALOG_NUM, false, tc);
    toid = td.getUUID();
    /* Add the conglomerate for the heap */
    ConglomerateDescriptor cgd = ddg.newConglomerateDescriptor(conglomId, heapName, false, null, false, heapUUID, toid, sd.getUUID());
    addDescriptor(cgd, sd, SYSCONGLOMERATES_CATALOG_NUM, false, tc);
    /* Create the columns */
    ColumnDescriptor[] cdlArray = new ColumnDescriptor[columnCount];
    for (int columnNumber = 0; columnNumber < columnCount; columnNumber++) {
        column = columnList[columnNumber];
        if (SanityManager.DEBUG) {
            if (column == null) {
                SanityManager.THROWASSERT("column " + columnNumber + " for table " + ti.getTableName() + " is null");
            }
        }
        cdlArray[columnNumber] = makeColumnDescriptor(column, columnNumber + 1, td);
    }
    addDescriptorArray(cdlArray, td, SYSCOLUMNS_CATALOG_NUM, false, tc);
    // now add the columns to the cdl of the table.
    ColumnDescriptorList cdl = td.getColumnDescriptorList();
    for (int i = 0; i < columnCount; i++) cdl.add(cdlArray[i]);
}

Example 3 with ColumnDescriptorList

use of org.apache.derby.iapi.sql.dictionary.ColumnDescriptorList in project derby by apache.

the class DataDictionaryImpl method getColumnDescriptorsScan.

/**
 * Populate the ColumnDescriptorList for the specified TableDescriptor.
 *
 * MT synchronization: it is assumed that the caller has synchronized
 * on the CDL in the given TD.
 *
 * @param uuid				The referencing UUID
 * @param cdl			The column descriptor list
 * @param td				The parent tuple descriptor
 *
 * @exception StandardException		Thrown on failure
 */
private void getColumnDescriptorsScan(UUID uuid, ColumnDescriptorList cdl, TupleDescriptor td) throws StandardException {
    ColumnDescriptor cd;
    ColumnDescriptorList cdlCopy = new ColumnDescriptorList();
    DataValueDescriptor refIDOrderable = null;
    TabInfoImpl ti = coreInfo[SYSCOLUMNS_CORE_NUM];
    /* Use refIDOrderable in both start and stop position for scan. */
    refIDOrderable = getIDValueAsCHAR(uuid);
    /* Set up the start/stop position for the scan */
    ExecIndexRow keyRow = exFactory.getIndexableRow(1);
    keyRow.setColumn(1, refIDOrderable);
    getDescriptorViaIndex(SYSCOLUMNSRowFactory.SYSCOLUMNS_INDEX1_ID, keyRow, (ScanQualifier[][]) null, ti, td, cdl, ColumnDescriptor.class, false);
    /* The TableDescriptor's column descriptor list must be ordered by
		 * columnNumber.  (It is probably not ordered correctly at this point due
		 * to the index on syscolumns being on (tableId, columnName).)  The
		 * cheapest way to reorder the list appears to be to copy it (above), and then
		 * walk the copy and put the elements back into the original in the
		 * expected locations.
		 */
    int cdlSize = cdl.size();
    for (int index = 0; index < cdlSize; index++) {
        cdlCopy.add(cdl.get(index));
    }
    for (int index = 0; index < cdlSize; index++) {
        cd = (ColumnDescriptor) cdlCopy.elementAt(index);
        cdl.set(cd.getPosition() - 1, cd);
    }
}

Example 4 with ColumnDescriptorList

use of org.apache.derby.iapi.sql.dictionary.ColumnDescriptorList in project derby by apache.

the class DataDictionaryImpl method getSPSParams.

/**
 * Get all the parameter descriptors for an SPS.
 * Look up the params in SYSCOLUMNS and turn them
 * into parameter descriptors.
 *
 * @param spsd	sps descriptor
 * @param defaults list for storing column defaults
 *
 * @return array of data type descriptors
 *
 * @exception StandardException		Thrown on error
 */
public DataTypeDescriptor[] getSPSParams(SPSDescriptor spsd, List<DataValueDescriptor> defaults) throws StandardException {
    ColumnDescriptorList cdl = new ColumnDescriptorList();
    getColumnDescriptorsScan(spsd.getUUID(), cdl, spsd);
    int cdlSize = cdl.size();
    DataTypeDescriptor[] params = new DataTypeDescriptor[cdlSize];
    for (int index = 0; index < cdlSize; index++) {
        ColumnDescriptor cd = (ColumnDescriptor) cdl.elementAt(index);
        params[index] = cd.getType();
        if (defaults != null) {
            defaults.add(cd.getDefaultValue());
        }
    }
    return params;
}

Example 5 with ColumnDescriptorList

use of org.apache.derby.iapi.sql.dictionary.ColumnDescriptorList in project derby by apache.

the class InsertNode method generate.

/**
 * Code generation for insert
 * creates an expression for:
 *   ResultSetFactory.getInsertResultSet(resultSet.generate(ps), generationClausesResult, checkConstrainResult, this )
 *
 * @param acb	The ActivationClassBuilder for the class being built
 * @param mb the method  for the execute() method to be built
 *
 * @exception StandardException		Thrown on error
 */
@Override
void generate(ActivationClassBuilder acb, MethodBuilder mb) throws StandardException {
    // If the DML is on the temporary table, generate the code to
    // mark temporary table as modified in the current UOW. After
    // DERBY-827 this must be done in execute() since
    // createResultSet() will only be called once.
    generateCodeForTemporaryTable(acb);
    /* generate the parameters */
    generateParameterValueSet(acb);
    // Base table
    if (targetTableDescriptor != null) {
        /*
			** Generate the insert result set, giving it either the original
			** source or the normalize result set, the constant action,
			** and "this".
			*/
        acb.pushGetResultSetFactoryExpression(mb);
        // arg 1
        if (inMatchingClause()) {
            matchingClause.generateResultSetField(acb, mb);
        } else {
            resultSet.generate(acb, mb);
        }
        // arg 2 generate code to evaluate generation clauses
        generateGenerationClauses(resultColumnList, resultSet.getResultSetNumber(), false, acb, mb);
        // arg 3 generate code to evaluate CHECK CONSTRAINTS
        generateCheckConstraints(checkConstraints, acb, mb);
        // arg 4 row template used by bulk insert
        if (bulkInsert) {
            ColumnDescriptorList cdl = targetTableDescriptor.getColumnDescriptorList();
            ExecRowBuilder builder = new ExecRowBuilder(cdl.size(), false);
            for (int i = 0; i < cdl.size(); i++) {
                ColumnDescriptor cd = cdl.get(i);
                builder.setColumn(i + 1, cd.getType());
            }
            mb.push(acb.addItem(builder));
        } else {
            mb.push(-1);
        }
        // arg 5, 6 table name
        if (targetTableName.getSchemaName() == null) {
            mb.pushNull("java.lang.String");
        } else {
            mb.push(targetTableName.getSchemaName());
        }
        mb.push(targetTableName.getTableName());
        mb.callMethod(VMOpcode.INVOKEINTERFACE, (String) null, "getInsertResultSet", ClassName.ResultSet, 6);
    } else {
        /* Generate code for the VTI
			 * NOTE: we need to create a dummy cost estimate for the
			 * targetVTI since we never optimized it.
			 * RESOLVEVTI - we will have to optimize it in order to 
			 * push predicates into the VTI.
			 */
        targetVTI.assignCostEstimate(resultSet.getNewCostEstimate());
        /*
			** Generate the insert VTI result set, giving it either the original
			** source or the normalize result set, the constant action,
			*/
        acb.pushGetResultSetFactoryExpression(mb);
        // arg 1
        resultSet.generate(acb, mb);
        // arg 2
        targetVTI.generate(acb, mb);
        mb.callMethod(VMOpcode.INVOKEINTERFACE, (String) null, "getInsertVTIResultSet", ClassName.ResultSet, 2);
    }
}