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

Example 36 with DataDictionary

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

the class CreateTableConstantAction method executeConstantAction.

// INTERFACE METHODS
/**
 *	This is the guts of the Execution-time logic for CREATE TABLE.
 *
 *	@see ConstantAction#executeConstantAction
 *
 * @exception StandardException		Thrown on failure
 */
public void executeConstantAction(Activation activation) throws StandardException {
    TableDescriptor td;
    UUID toid;
    SchemaDescriptor schemaDescriptor;
    ColumnDescriptor columnDescriptor;
    ExecRow template;
    LanguageConnectionContext lcc = activation.getLanguageConnectionContext();
    DataDictionary dd = lcc.getDataDictionary();
    DependencyManager dm = dd.getDependencyManager();
    TransactionController tc = lcc.getTransactionExecute();
    /* Mark the activation as being for create table */
    activation.setForCreateTable();
    // setup for create conglomerate call:
    // o create row template to tell the store what type of rows this
    // table holds.
    // o create array of collation id's to tell collation id of each
    // column in table.
    template = RowUtil.getEmptyValueRow(columnInfo.length, lcc);
    int[] collation_ids = new int[columnInfo.length];
    for (int ix = 0; ix < columnInfo.length; ix++) {
        ColumnInfo col_info = columnInfo[ix];
        if (col_info.defaultValue != null) {
            /* If there is a default value, use it, otherwise use null */
            template.setColumn(ix + 1, col_info.defaultValue);
        } else {
            template.setColumn(ix + 1, col_info.dataType.getNull());
        }
        // get collation info for each column.
        collation_ids[ix] = col_info.dataType.getCollationType();
    }
    /* create the conglomerate to hold the table's rows
		 * RESOLVE - If we ever have a conglomerate creator
		 * that lets us specify the conglomerate number then
		 * we will need to handle it here.
		 */
    long conglomId = tc.createConglomerate(// we're requesting a heap conglomerate
    "heap", // row template
    template.getRowArray(), // column sort order - not required for heap
    null, collation_ids, // properties
    properties, tableType == TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE ? (TransactionController.IS_TEMPORARY | TransactionController.IS_KEPT) : TransactionController.IS_DEFAULT);
    /*
		** Inform the data dictionary that we are about to write to it.
		** There are several calls to data dictionary "get" methods here
		** that might be done in "read" mode in the data dictionary, but
		** it seemed safer to do this whole operation in "write" mode.
		**
		** We tell the data dictionary we're done writing at the end of
		** the transaction.
		*/
    if (tableType != TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE)
        dd.startWriting(lcc);
    SchemaDescriptor sd;
    if (tableType == TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE)
        sd = dd.getSchemaDescriptor(schemaName, tc, true);
    else
        sd = DDLConstantAction.getSchemaDescriptorForCreate(dd, activation, schemaName);
    // 
    // Create a new table descriptor.
    // 
    DataDescriptorGenerator ddg = dd.getDataDescriptorGenerator();
    if (tableType != TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE) {
        td = ddg.newTableDescriptor(tableName, sd, tableType, lockGranularity);
        dd.addDescriptor(td, sd, DataDictionary.SYSTABLES_CATALOG_NUM, false, tc);
    } else {
        td = ddg.newTableDescriptor(tableName, sd, tableType, onCommitDeleteRows, onRollbackDeleteRows);
        td.setUUID(dd.getUUIDFactory().createUUID());
    }
    toid = td.getUUID();
    // Save the TableDescriptor off in the Activation
    activation.setDDLTableDescriptor(td);
    /* NOTE: We must write the columns out to the system
		 * tables before any of the conglomerates, including
		 * the heap, since we read the columns before the
		 * conglomerates when building a TableDescriptor.
		 * This will hopefully reduce the probability of
		 * a deadlock involving those system tables.
		 */
    // for each column, stuff system.column
    int index = 1;
    ColumnDescriptor[] cdlArray = new ColumnDescriptor[columnInfo.length];
    for (int ix = 0; ix < columnInfo.length; ix++) {
        UUID defaultUUID = columnInfo[ix].newDefaultUUID;
        /* Generate a UUID for the default, if one exists
			 * and there is no default id yet.
			 */
        if (columnInfo[ix].defaultInfo != null && defaultUUID == null) {
            defaultUUID = dd.getUUIDFactory().createUUID();
        }
        if (// dealing with autoinc column
        columnInfo[ix].autoincInc != 0) {
            columnDescriptor = new ColumnDescriptor(columnInfo[ix].name, index++, columnInfo[ix].dataType, columnInfo[ix].defaultValue, columnInfo[ix].defaultInfo, td, defaultUUID, columnInfo[ix].autoincStart, columnInfo[ix].autoincInc, columnInfo[ix].autoinc_create_or_modify_Start_Increment, columnInfo[ix].autoincCycle);
            // 
            if (dd.checkVersion(DataDictionary.DD_VERSION_DERBY_10_11, null)) {
                CreateSequenceConstantAction csca = makeCSCA(columnInfo[ix], TableDescriptor.makeSequenceName(toid));
                csca.executeConstantAction(activation);
            }
        } else {
            columnDescriptor = new ColumnDescriptor(columnInfo[ix].name, index++, columnInfo[ix].dataType, columnInfo[ix].defaultValue, columnInfo[ix].defaultInfo, td, defaultUUID, columnInfo[ix].autoincStart, columnInfo[ix].autoincInc, columnInfo[ix].autoincCycle);
        }
        cdlArray[ix] = columnDescriptor;
    }
    if (tableType != TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE) {
        dd.addDescriptorArray(cdlArray, td, DataDictionary.SYSCOLUMNS_CATALOG_NUM, false, tc);
    }
    // now add the column descriptors to the table.
    ColumnDescriptorList cdl = td.getColumnDescriptorList();
    for (int i = 0; i < cdlArray.length; i++) cdl.add(cdlArray[i]);
    // 
    // Create a conglomerate desciptor with the conglomId filled in and
    // add it.
    // 
    // RESOLVE: Get information from the conglomerate descriptor which
    // was provided.
    // 
    ConglomerateDescriptor cgd = ddg.newConglomerateDescriptor(conglomId, null, false, null, false, null, toid, sd.getUUID());
    if (tableType != TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE) {
        dd.addDescriptor(cgd, sd, DataDictionary.SYSCONGLOMERATES_CATALOG_NUM, false, tc);
    }
    // add the newly added conglomerate to the table descriptor
    ConglomerateDescriptorList conglomList = td.getConglomerateDescriptorList();
    conglomList.add(cgd);
    /* Create any constraints */
    if (constraintActions != null) {
        /*
			** Do everything but FK constraints first,
			** then FK constraints on 2nd pass.
			*/
        for (int conIndex = 0; conIndex < constraintActions.length; conIndex++) {
            // skip fks
            if (!constraintActions[conIndex].isForeignKeyConstraint()) {
                constraintActions[conIndex].executeConstantAction(activation);
            }
        }
        for (int conIndex = 0; conIndex < constraintActions.length; conIndex++) {
            // only foreign keys
            if (constraintActions[conIndex].isForeignKeyConstraint()) {
                constraintActions[conIndex].executeConstantAction(activation);
            }
        }
    }
    // 
    for (int ix = 0; ix < columnInfo.length; ix++) {
        addColumnDependencies(lcc, dd, td, columnInfo[ix]);
    }
    // 
    // The table itself can depend on the user defined types of its columns.
    // 
    adjustUDTDependencies(lcc, dd, td, columnInfo, false);
    if (tableType == TableDescriptor.GLOBAL_TEMPORARY_TABLE_TYPE) {
        lcc.addDeclaredGlobalTempTable(td);
    }
    // Indicate that the CREATE TABLE statement itself depends on the
    // table it is creating. Normally such statement dependencies are
    // added during compilation, but here we have a bootstrapping issue
    // because the table doesn't exist until the CREATE TABLE statement
    // has been executed, so we had to defer the creation of this
    // dependency until now. (DERBY-4479)
    dd.getDependencyManager().addDependency(activation.getPreparedStatement(), td, lcc.getContextManager());
}

Example 37 with DataDictionary

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

the class CreateTriggerConstantAction method executeConstantAction.

/**
 * This is the guts of the Execution-time logic for CREATE TRIGGER.
 *
 * @see ConstantAction#executeConstantAction
 *
 * @exception StandardException		Thrown on failure
 */
public void executeConstantAction(Activation activation) throws StandardException {
    SPSDescriptor whenspsd = null;
    SPSDescriptor actionspsd;
    LanguageConnectionContext lcc = activation.getLanguageConnectionContext();
    DataDictionary dd = lcc.getDataDictionary();
    DependencyManager dm = dd.getDependencyManager();
    TransactionController tc = lcc.getTransactionExecute();
    /*
		** Indicate that we are about to modify the data dictionary.
		** 
		** We tell the data dictionary we're done writing at the end of
		** the transaction.
		*/
    dd.startWriting(lcc);
    SchemaDescriptor triggerSd = getSchemaDescriptorForCreate(dd, activation, triggerSchemaName);
    if (spsCompSchemaId == null) {
        SchemaDescriptor def = lcc.getDefaultSchema();
        if (def.getUUID() == null) {
            // Descriptor for default schema is stale,
            // look it up in the dictionary
            def = dd.getSchemaDescriptor(def.getDescriptorName(), tc, false);
        }
        /* 
			** It is possible for spsCompSchemaId to be null.  For instance, 
			** the current schema may not have been physically created yet but 
			** it exists "virtually".  In this case, its UUID will have the 
			** value of null meaning that it is not persistent.  e.g.:   
			**
			** CONNECT 'db;create=true' user 'ernie';
			** CREATE TABLE bert.t1 (i INT);
			** CREATE TRIGGER bert.tr1 AFTER INSERT ON bert.t1 
			**    FOR EACH STATEMENT MODE DB2SQL 
			**    SELECT * FROM SYS.SYSTABLES;
			**
			** Note that in the above case, the trigger action statement have a 
			** null compilation schema.  A compilation schema with null value 
			** indicates that the trigger action statement text does not have 
			** any dependencies with the CURRENT SCHEMA.  This means:
			**
			** o  It is safe to compile this statement in any schema since 
			**    there is no dependency with the CURRENT SCHEMA. i.e.: All 
			**    relevent identifiers are qualified with a specific schema.
			**
			** o  The statement cache mechanism can utilize this piece of 
			**    information to enable better statement plan sharing across 
			**    connections in different schemas; thus, avoiding unnecessary 
			**    statement compilation.
			*/
        if (def != null)
            spsCompSchemaId = def.getUUID();
    }
    String tabName;
    if (triggerTable != null) {
        triggerTableId = triggerTable.getUUID();
        tabName = triggerTable.getName();
    } else
        tabName = "with UUID " + triggerTableId;
    /* We need to get table descriptor again.  We simply can't trust the
		 * one we got at compile time, the lock on system table was released
		 * when compile was done, and the table might well have been dropped.
		 */
    triggerTable = dd.getTableDescriptor(triggerTableId);
    if (triggerTable == null) {
        throw StandardException.newException(SQLState.LANG_TABLE_NOT_FOUND_DURING_EXECUTION, tabName);
    }
    /* Lock the table for DDL.  Otherwise during our execution, the table
		 * might be changed, even dropped.  Beetle 4269
		 */
    lockTableForDDL(tc, triggerTable.getHeapConglomerateId(), true);
    /* get triggerTable again for correctness, in case it's changed before
		 * the lock is aquired
		 */
    triggerTable = dd.getTableDescriptor(triggerTableId);
    if (triggerTable == null) {
        throw StandardException.newException(SQLState.LANG_TABLE_NOT_FOUND_DURING_EXECUTION, tabName);
    }
    /*
		** Send an invalidate on the table from which
		** the triggering event emanates.  This it
		** to make sure that DML statements on this table
		** will be recompiled.  Do this before we create
		** our trigger spses lest we invalidate them just
		** after creating them.
		*/
    dm.invalidateFor(triggerTable, DependencyManager.CREATE_TRIGGER, lcc);
    /*
		** Lets get our trigger id up front, we'll use it when
	 	** we create our spses.
		*/
    UUID tmpTriggerId = dd.getUUIDFactory().createUUID();
    actionSPSId = (actionSPSId == null) ? dd.getUUIDFactory().createUUID() : actionSPSId;
    if (whenSPSId == null && whenText != null) {
        whenSPSId = dd.getUUIDFactory().createUUID();
    }
    DataDescriptorGenerator ddg = dd.getDataDescriptorGenerator();
    /*
		** Create the trigger descriptor first so the trigger action
		** compilation can pick up the relevant trigger especially in 
		** the case of self triggering.
		*/
    TriggerDescriptor triggerd = ddg.newTriggerDescriptor(triggerSd, tmpTriggerId, triggerName, eventMask, isBefore, isRow, isEnabled, triggerTable, whenSPSId, actionSPSId, makeCreationTimestamp(dd), referencedCols, referencedColsInTriggerAction, originalActionText, referencingOld, referencingNew, oldReferencingName, newReferencingName, originalWhenText);
    dd.addDescriptor(triggerd, triggerSd, DataDictionary.SYSTRIGGERS_CATALOG_NUM, false, tc);
    /*	
		** If we have a WHEN action we create it now.
		*/
    if (whenText != null) {
        // The WHEN clause is just a search condition and not a full
        // SQL statement. Turn in into a VALUES statement.
        String whenValuesStmt = "VALUES " + whenText;
        whenspsd = createSPS(lcc, ddg, dd, tc, tmpTriggerId, triggerSd, whenSPSId, spsCompSchemaId, whenValuesStmt, true, triggerTable);
    }
    /*
		** Create the trigger action
		*/
    actionspsd = createSPS(lcc, ddg, dd, tc, tmpTriggerId, triggerSd, actionSPSId, spsCompSchemaId, actionText, false, triggerTable);
    /*
		** Make underlying spses dependent on the trigger.
		*/
    if (whenspsd != null) {
        dm.addDependency(triggerd, whenspsd, lcc.getContextManager());
    }
    dm.addDependency(triggerd, actionspsd, lcc.getContextManager());
    dm.addDependency(triggerd, triggerTable, lcc.getContextManager());
    // from the triggered statement or the WHEN clause.
    for (ProviderInfo info : providerInfo) {
        Provider provider = (Provider) info.getDependableFinder().getDependable(dd, info.getObjectId());
        dm.addDependency(triggerd, provider, lcc.getContextManager());
    }
    // store trigger's dependency on various privileges in the dependeny system
    storeViewTriggerDependenciesOnPrivileges(activation, triggerd);
}

Example 38 with DataDictionary

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

the class UpdateNode method bindStatement.

/**
 * Bind this UpdateNode.  This means looking up tables and columns and
 * getting their types, and figuring out the result types of all
 * expressions, as well as doing view resolution, permissions checking,
 * etc.
 * <p>
 * Binding an update will also massage the tree so that
 * the ResultSetNode has a set of columns to contain the old row
 * value, followed by a set of columns to contain the new row
 * value, followed by a column to contain the RowLocation of the
 * row to be updated.
 *
 * @exception StandardException		Thrown on error
 */
@Override
public void bindStatement() throws StandardException {
    // We just need select privilege on the expressions
    getCompilerContext().pushCurrentPrivType(Authorizer.SELECT_PRIV);
    FromList fromList = new FromList(getOptimizerFactory().doJoinOrderOptimization(), getContextManager());
    TableName cursorTargetTableName = null;
    CurrentOfNode currentOfNode = null;
    ResultColumnList afterColumns = null;
    DataDictionary dataDictionary = getDataDictionary();
    // check if targetTable is a synonym
    if (targetTableName != null) {
        TableName synonymTab = resolveTableToSynonym(this.targetTableName);
        if (synonymTab != null) {
            this.synonymTableName = targetTableName;
            this.targetTableName = synonymTab;
        }
    }
    // 
    if (inMatchingClause()) {
        tagOriginalResultSetColumns();
    }
    // collect lists of objects which will require privilege checks
    ArrayList<String> explicitlySetColumns = getExplicitlySetColumns();
    List<CastNode> allCastNodes = collectAllCastNodes();
    tagPrivilegedNodes();
    // tell the compiler to only add privilege checks for nodes which have been tagged
    TagFilter tagFilter = new TagFilter(TagFilter.NEED_PRIVS_FOR_UPDATE_STMT);
    getCompilerContext().addPrivilegeFilter(tagFilter);
    bindTables(dataDictionary);
    // for positioned update, get the cursor's target table.
    if (SanityManager.DEBUG) {
        SanityManager.ASSERT((resultSet != null && resultSet instanceof SelectNode), "Update must have a select result set");
    }
    SelectNode sel;
    sel = (SelectNode) resultSet;
    targetTable = (FromTable) sel.fromList.elementAt(0);
    if (targetTable instanceof CurrentOfNode) {
        positionedUpdate = true;
        currentOfNode = (CurrentOfNode) targetTable;
        cursorTargetTableName = currentOfNode.getBaseCursorTargetTableName();
        // instead of an assert, we might say the cursor is not updatable.
        if (SanityManager.DEBUG) {
            SanityManager.ASSERT(cursorTargetTableName != null);
        }
    }
    if (targetTable instanceof FromVTI) {
        targetVTI = (FromVTI) targetTable;
        targetVTI.setTarget();
    } else {
        // we get it from the cursor supplying the position.
        if (targetTableName == null) {
            // verify we have current of
            if (SanityManager.DEBUG)
                SanityManager.ASSERT(cursorTargetTableName != null);
            targetTableName = cursorTargetTableName;
        } else // the named table is the same as the cursor's target.
        if (cursorTargetTableName != null) {
            // be the same as a correlation name in the cursor.
            if (!targetTableName.equals(cursorTargetTableName)) {
                throw StandardException.newException(SQLState.LANG_CURSOR_UPDATE_MISMATCH, targetTableName, currentOfNode.getCursorName());
            }
        }
    }
    // because we verified that the tables match
    // and we already bound the cursor or the select,
    // the table descriptor should always be found.
    verifyTargetTable();
    // add UPDATE_PRIV on all columns on the left side of SET operators
    addUpdatePriv(explicitlySetColumns);
    /* Verify that all underlying ResultSets reclaimed their FromList */
    if (SanityManager.DEBUG) {
        SanityManager.ASSERT(fromList.size() == 0, "fromList.size() is expected to be 0, not " + fromList.size() + " on return from RS.bindExpressions()");
    }
    // 
    // Add generated columns whose generation clauses mention columns
    // in the user's original update list.
    // 
    ColumnDescriptorList addedGeneratedColumns = new ColumnDescriptorList();
    ColumnDescriptorList affectedGeneratedColumns = new ColumnDescriptorList();
    addGeneratedColumns(targetTableDescriptor, resultSet, affectedGeneratedColumns, addedGeneratedColumns);
    /*
		** The current result column list is the one supplied by the user.
		** Mark these columns as "updated", so we can tell later which
		** columns are really being updated, and which have been added
		** but are not really being updated.
		*/
    resultSet.getResultColumns().markUpdated();
    /* Prepend CurrentRowLocation() to the select's result column list. */
    if (SanityManager.DEBUG)
        SanityManager.ASSERT((resultSet.getResultColumns() != null), "resultColumns is expected not to be null at bind time");
    /* Normalize the SET clause's result column list for synonym */
    if (synonymTableName != null)
        normalizeSynonymColumns(resultSet.getResultColumns(), targetTable);
    /* Bind the original result columns by column name */
    normalizeCorrelatedColumns(resultSet.getResultColumns(), targetTable);
    resultSet.bindResultColumns(targetTableDescriptor, targetVTI, resultSet.getResultColumns(), this, fromList);
    // don't allow overriding of generation clauses
    forbidGenerationOverrides(resultSet.getResultColumns(), addedGeneratedColumns);
    // the code for old way of generating unique ids.
    if (dataDictionary.checkVersion(DataDictionary.DD_VERSION_DERBY_10_11, null)) {
        // Replace any DEFAULTs with the associated tree for the default if
        // allowed, otherwise throw an exception
        resultSet.getResultColumns().replaceOrForbidDefaults(targetTableDescriptor, resultSet.getResultColumns(), true);
        resultSet.getResultColumns().checkForInvalidDefaults();
        resultSet.getResultColumns().forbidOverrides(resultSet.getResultColumns());
    } else {
        LanguageConnectionContext lcc = getLanguageConnectionContext();
        if (lcc.getAutoincrementUpdate() == false)
            resultSet.getResultColumns().forbidOverrides(null);
    }
    /*
		** Mark the columns in this UpdateNode's result column list as
		** updateable in the ResultColumnList of the table being updated.
		** only do this for FromBaseTables - if the result table is a
		** CurrentOfNode, it already knows what columns in its cursor
		** are updateable.
		*/
    boolean allColumns = false;
    if (targetTable instanceof FromBaseTable) {
        ((FromBaseTable) targetTable).markUpdated(resultSet.getResultColumns());
    } else if ((targetTable instanceof FromVTI) || (targetTable instanceof FromSubquery)) {
        resultColumnList = resultSet.getResultColumns();
    } else {
        /*
			** Positioned update: WHERE CURRENT OF
			*/
        if (SanityManager.DEBUG) {
            SanityManager.ASSERT(currentOfNode != null, "currentOfNode is null");
        }
        ExecPreparedStatement cursorStmt = currentOfNode.getCursorStatement();
        /*
			** If there is no update column list, we need to build
			** out the result column list to have all columns.
			*/
        if (!cursorStmt.hasUpdateColumns()) {
            /*
				** Get the resultColumnList representing ALL of the columns in the 
				** base table.  This is the "before" portion of the result row.
				*/
            getResultColumnList();
            /*
				** Add the "after" portion of the result row.  This is the update
				** list augmented to include every column in the target table.
				** Those columns that are not being updated are set to themselves.
				** The expanded list will be in the order of the columns in the base
				** table.
				*/
            afterColumns = resultSet.getResultColumns().expandToAll(targetTableDescriptor, targetTable.getTableName());
            /*
				** Need to get all indexes here since we aren't calling
				** getReadMap().
				*/
            getAffectedIndexes(targetTableDescriptor, (ResultColumnList) null, (FormatableBitSet) null);
            allColumns = true;
        } else {
            /* Check the updatability */
            resultSet.getResultColumns().checkColumnUpdateability(cursorStmt, currentOfNode.getCursorName());
        }
    }
    changedColumnIds = getChangedColumnIds(resultSet.getResultColumns());
    // 
    // Trigger transition tables are implemented as VTIs. This short-circuits some
    // necessary steps if the source table of a MERGE statement is a trigger
    // transition table. The following boolean is meant to prevent that short-circuiting.
    // 
    boolean needBaseColumns = (targetVTI == null) || inMatchingClause();
    /*
		** We need to add in all the columns that are needed
		** by the constraints on this table.  
		*/
    if (!allColumns && needBaseColumns) {
        getCompilerContext().pushCurrentPrivType(Authorizer.NULL_PRIV);
        try {
            readColsBitSet = new FormatableBitSet();
            FromBaseTable fbt = getResultColumnList(resultSet.getResultColumns());
            afterColumns = resultSet.getResultColumns().copyListAndObjects();
            readColsBitSet = getReadMap(dataDictionary, targetTableDescriptor, afterColumns, affectedGeneratedColumns);
            afterColumns = fbt.addColsToList(afterColumns, readColsBitSet);
            resultColumnList = fbt.addColsToList(resultColumnList, readColsBitSet);
            /*
				** If all bits are set, then behave as if we chose all
				** in the first place
				*/
            int i = 1;
            int size = targetTableDescriptor.getMaxColumnID();
            for (; i <= size; i++) {
                if (!readColsBitSet.get(i)) {
                    break;
                }
            }
            if (i > size) {
                readColsBitSet = null;
            }
        } finally {
            getCompilerContext().popCurrentPrivType();
        }
    }
    ValueNode rowLocationNode;
    if (needBaseColumns) {
        /* Append the list of "after" columns to the list of "before" columns,
			 * preserving the afterColumns list.  (Necessary for binding
			 * check constraints.)
			 */
        resultColumnList.appendResultColumns(afterColumns, false);
        /* Generate the RowLocation column */
        rowLocationNode = new CurrentRowLocationNode(getContextManager());
    } else {
        rowLocationNode = new NumericConstantNode(TypeId.getBuiltInTypeId(Types.INTEGER), 0, getContextManager());
    }
    ResultColumn rowLocationColumn = new ResultColumn(COLUMNNAME, rowLocationNode, getContextManager());
    rowLocationColumn.markGenerated();
    /* Append to the ResultColumnList */
    resultColumnList.addResultColumn(rowLocationColumn);
    /*
		 * The last thing that we do to the generated RCL is to clear
		 * the table name out from each RC. See comment on 
		 * checkTableNameAndScrubResultColumns().
		 */
    checkTableNameAndScrubResultColumns(resultColumnList);
    /* Set the new result column list in the result set */
    resultSet.setResultColumns(resultColumnList);
    // 
    if (inMatchingClause()) {
        associateAddedColumns();
    }
    // SQL 2011, section 6.10, SR 4b.
    SelectNode.checkNoWindowFunctions(resultSet, "<update source>");
    /* Bind the expressions */
    super.bindExpressions();
    /* Bind untyped nulls directly under the result columns */
    resultSet.getResultColumns().bindUntypedNullsToResultColumns(resultColumnList);
    /* Bind the new ResultColumn */
    rowLocationColumn.bindResultColumnToExpression();
    resultColumnList.checkStorableExpressions();
    /* Insert a NormalizeResultSetNode above the source if the source
		 * and target column types and lengths do not match.
		 */
    if (!resultColumnList.columnTypesAndLengthsMatch()) {
        resultSet = new NormalizeResultSetNode(resultSet, resultColumnList, null, true, getContextManager());
        if (hasCheckConstraints(dataDictionary, targetTableDescriptor) || hasGenerationClauses(targetTableDescriptor)) {
            /* Get and bind all check constraints and generated columns on the columns
	 			 * being updated.  We want to bind the check constraints and
	 			 * generated columns against
	 			 * the after columns.  We need to bind against the portion of the
	 			 * resultColumns in the new NormalizeResultSet that point to 
	 			 * afterColumns.  Create an RCL composed of just those RCs in
	 			 * order to bind the check constraints.
	 			 */
            int afterColumnsSize = afterColumns.size();
            afterColumns = new ResultColumnList(getContextManager());
            ResultColumnList normalizedRCs = resultSet.getResultColumns();
            for (int index = 0; index < afterColumnsSize; index++) {
                afterColumns.addElement(normalizedRCs.elementAt(index + afterColumnsSize));
            }
        }
    }
    if (null != targetVTI && !inMatchingClause()) {
        deferred = VTIDeferModPolicy.deferIt(DeferModification.UPDATE_STATEMENT, targetVTI, resultColumnList.getColumnNames(), sel.getWhereClause());
    } else // not VTI
    {
        /* we always include triggers in core language */
        boolean hasTriggers = (getAllRelevantTriggers(dataDictionary, targetTableDescriptor, changedColumnIds, true).size() > 0);
        ResultColumnList sourceRCL = hasTriggers ? resultColumnList : afterColumns;
        /* bind all generation clauses for generated columns */
        parseAndBindGenerationClauses(dataDictionary, targetTableDescriptor, afterColumns, resultColumnList, true, resultSet);
        /* Get and bind all constraints on the columns being updated */
        checkConstraints = bindConstraints(dataDictionary, getOptimizerFactory(), targetTableDescriptor, null, sourceRCL, changedColumnIds, readColsBitSet, true, /* we always include triggers in core language */
        new boolean[1]);
        /* If the target table is also a source table, then
             * the update will have to be in deferred mode
             * For updates, this means that the target table appears in a
             * subquery.  Also, self referencing foreign keys are
             * deferred.  And triggers cause an update to be deferred.
             */
        if (resultSet.subqueryReferencesTarget(targetTableDescriptor.getName(), true) || requiresDeferredProcessing()) {
            deferred = true;
        }
        TransactionController tc = getLanguageConnectionContext().getTransactionCompile();
        autoincRowLocation = dataDictionary.computeAutoincRowLocations(tc, targetTableDescriptor);
    }
    identitySequenceUUIDString = getUUIDofSequenceGenerator();
    getCompilerContext().popCurrentPrivType();
    getCompilerContext().removePrivilegeFilter(tagFilter);
    // 
    for (CastNode value : allCastNodes) {
        addUDTUsagePriv(value);
    }
}

Example 39 with DataDictionary

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

the class GenericAuthorizer method authorize.

public void authorize(List<StatementPermission> requiredPermissionsList, Activation activation) throws StandardException {
    DataDictionary dd = lcc.getDataDictionary();
    // requiredPermissionsList for Database Owner
    if (requiredPermissionsList != null && !requiredPermissionsList.isEmpty() && !lcc.getCurrentUserId(activation).equals(dd.getAuthorizationDatabaseOwner())) {
        int ddMode = dd.startReading(lcc);
        /*
             * The system may need to read the permission descriptor(s) 
             * from the system table(s) if they are not available in the 
             * permission cache.  So start an internal read-only nested 
             * transaction for this.
             * 
             * The reason to use a nested transaction here is to not hold
             * locks on system tables on a user transaction.  e.g.:  when
             * attempting to revoke an user, the statement may time out
             * since the user-to-be-revoked transaction may have acquired 
             * shared locks on the permission system tables; hence, this
             * may not be desirable.  
             * 
             * All locks acquired by StatementPermission object's check()
             * method will be released when the system ends the nested 
             * transaction.
             * 
             * In Derby, the locks from read nested transactions come from
             * the same space as the parent transaction; hence, they do not
             * conflict with parent locks.
             */
        lcc.beginNestedTransaction(true);
        try {
            try {
                // perform the permission checking
                for (StatementPermission rp : requiredPermissionsList) {
                    rp.check(lcc, false, activation);
                }
            } finally {
                dd.doneReading(ddMode, lcc);
            }
        } finally {
            // make sure we commit; otherwise, we will end up with
            // mismatch nested level in the language connection context.
            lcc.commitNestedTransaction();
        }
    }
}

Example 40 with DataDictionary

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

the class RenameConstantAction method execGutsRenameColumn.

// do necessary work for rename column at execute time.
private void execGutsRenameColumn(TableDescriptor td, Activation activation) throws StandardException {
    ColumnDescriptor columnDescriptor = null;
    int columnPosition = 0;
    ConstraintDescriptorList constraintDescriptorList;
    ConstraintDescriptor constraintDescriptor;
    LanguageConnectionContext lcc = activation.getLanguageConnectionContext();
    DataDictionary dd = lcc.getDataDictionary();
    DependencyManager dm = dd.getDependencyManager();
    TransactionController tc = lcc.getTransactionExecute();
    /* get the column descriptor for column to be renamed and
		 * using it's position in the table, set the referenced
		 * column map of the table indicating which column is being
		 * renamed. Dependency Manager uses this to find out the
		 * dependents on the column.
		 */
    columnDescriptor = td.getColumnDescriptor(oldObjectName);
    if (columnDescriptor.isAutoincrement())
        columnDescriptor.setAutoinc_create_or_modify_Start_Increment(ColumnDefinitionNode.CREATE_AUTOINCREMENT);
    columnPosition = columnDescriptor.getPosition();
    FormatableBitSet toRename = new FormatableBitSet(td.getColumnDescriptorList().size() + 1);
    toRename.set(columnPosition);
    td.setReferencedColumnMap(toRename);
    dm.invalidateFor(td, DependencyManager.RENAME, lcc);
    // look for foreign key dependency on the column.
    constraintDescriptorList = dd.getConstraintDescriptors(td);
    for (int index = 0; index < constraintDescriptorList.size(); index++) {
        constraintDescriptor = constraintDescriptorList.elementAt(index);
        int[] referencedColumns = constraintDescriptor.getReferencedColumns();
        int numRefCols = referencedColumns.length;
        for (int j = 0; j < numRefCols; j++) {
            if ((referencedColumns[j] == columnPosition) && (constraintDescriptor instanceof ReferencedKeyConstraintDescriptor))
                dm.invalidateFor(constraintDescriptor, DependencyManager.RENAME, lcc);
        }
    }
    // Drop the column
    dd.dropColumnDescriptor(td.getUUID(), oldObjectName, tc);
    columnDescriptor.setColumnName(newObjectName);
    dd.addDescriptor(columnDescriptor, td, DataDictionary.SYSCOLUMNS_CATALOG_NUM, false, tc);
    // Need to do following to reload the cache so that table
    // descriptor now has new column name
    td = dd.getTableDescriptor(td.getObjectID());
}