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

Example 1 with DataValueDescriptor

use of org.apache.derby.iapi.types.DataValueDescriptor 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 DataValueDescriptor

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

the class EmbedPreparedStatement method setScale.

/**
 * Set the scale of a parameter.
 *
 * @param parameterIndex The first parameter is 1, the second is 2, ...
 * @param scale	The scale
 * @exception SQLException thrown on failure.
 */
private void setScale(int parameterIndex, int scale) throws SQLException {
    checkStatus();
    if (scale < 0)
        throw newSQLException(SQLState.BAD_SCALE_VALUE, scale);
    try {
        ParameterValueSet pvs = getParms();
        /* JDBC is one-based, DBMS is zero-based */
        DataValueDescriptor value = pvs.getParameter(parameterIndex - 1);
        int origvaluelen = value.getLength();
        ((VariableSizeDataValue) value).setWidth(VariableSizeDataValue.IGNORE_PRECISION, scale, false);
        if (value.getLength() < origvaluelen) {
            activation.addWarning(StandardException.newWarning(SQLState.LANG_VALUE_TRUNCATED, value.getString()));
        }
    } catch (StandardException t) {
        throw EmbedResultSet.noStateChangeException(t);
    }
}

Example 3 with DataValueDescriptor

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

the class EmbedResultSet method adjustScale.

/**
 * <p>
 * Adjust the scale of a type.
 * </p>
 */
protected void adjustScale(int columnIndex, int scale) throws SQLException {
    /*
		* If the parameter type is DECIMAL or NUMERIC, then
		* we need to set them to the passed scale.
		*/
    int colType = getColumnType(columnIndex);
    if ((colType == Types.DECIMAL) || (colType == Types.NUMERIC)) {
        if (scale < 0)
            throw newSQLException(SQLState.BAD_SCALE_VALUE, scale);
        try {
            DataValueDescriptor value = updateRow.getColumn(columnIndex);
            int origvaluelen = value.getLength();
            ((VariableSizeDataValue) value).setWidth(VariableSizeDataValue.IGNORE_PRECISION, scale, false);
        } catch (StandardException t) {
            throw EmbedResultSet.noStateChangeException(t);
        }
    }
}

Example 4 with DataValueDescriptor

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

the class EmbedResultSet method getObject.

/**
 * <p>Get the value of a column in the current row as a Java object.
 *
 * <p>This method will return the value of the given column as a
 * Java object.  The type of the Java object will be the default
 * Java Object type corresponding to the column's SQL type,
 * following the mapping specified in the JDBC spec.
 *
 * <p>This method may also be used to read datatabase specific abstract
 * data types.
 *
 * JDBC 2.0
 *
 * New behavior for getObject().
 * The behavior of method getObject() is extended to materialize
 * data of SQL user-defined types.  When the column @columnIndex is
 * a structured or distinct value, the behavior of this method is as
 * if it were a call to: getObject(columnIndex,
 * this.getStatement().getConnection().getTypeMap()).
 *
 * @param columnIndex the first column is 1, the second is 2, ...
 * @return A java.lang.Object holding the column value.
 * @exception SQLException thrown on failure.
 */
public final Object getObject(int columnIndex) throws SQLException {
    checkIfClosed("getObject");
    // need special handling for some types.
    int colType = getColumnType(columnIndex);
    switch(colType) {
        case Types.CHAR:
        case Types.VARCHAR:
        case Types.LONGVARCHAR:
            // handles maxfield size correctly
            return getString(columnIndex);
        case Types.CLOB:
            return getClob(columnIndex);
        case Types.BINARY:
        case Types.VARBINARY:
        case Types.LONGVARBINARY:
            // handles maxfield size correctly
            return getBytes(columnIndex);
        case Types.BLOB:
            return getBlob(columnIndex);
        default:
            break;
    }
    try {
        DataValueDescriptor dvd = getColumn(columnIndex);
        if (wasNull = dvd.isNull())
            return null;
        return dvd.getObject();
    } catch (StandardException t) {
        throw noStateChangeException(t);
    }
}

Example 5 with DataValueDescriptor

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

the class EmbedResultSet method getBytes.

/**
 * Get the value of a column in the current row as a Java byte array.
 * The bytes represent the raw values returned by the driver.
 *
 * @param columnIndex the first column is 1, the second is 2, ...
 * @return the column value; if the value is SQL NULL, the result is null
 * @exception SQLException thrown on failure.
 */
public final byte[] getBytes(int columnIndex) throws SQLException {
    checkIfClosed("getBytes");
    int columnType = getColumnType(columnIndex);
    if (columnType == Types.BLOB) {
        checkLOBMultiCall(columnIndex);
    // If the above didn't fail, this is the first getter invocation,
    // or only getBytes has been invoked previously. The special
    // treatment of this getter is allowed for backwards compatibility.
    }
    try {
        DataValueDescriptor dvd = getColumn(columnIndex);
        if (wasNull = dvd.isNull())
            return null;
        byte[] value = dvd.getBytes();
        // check for the max field size limit
        if (maxFieldSize > 0 && isMaxFieldSizeType(columnType)) {
            if (value.length > maxFieldSize) {
                byte[] limited_value = new byte[maxFieldSize];
                System.arraycopy(value, 0, limited_value, 0, maxFieldSize);
                value = limited_value;
            }
        }
        return value;
    } catch (StandardException t) {
        throw noStateChangeException(t);
    }
}