Package org.h2.index

Examples of org.h2.index.Index

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        }
        lastModificationId = database.getNextModificationDataId();
        int i = indexes.size() - 1;
        try {
            for (; i >= 0; i--) {
                Index index = indexes.get(i);
                index.remove(session, row);
                checkRowCount(session, index, -1);
            }
            rowCount--;
        } catch (Throwable e) {
            try {
                while (++i < indexes.size()) {
                    Index index = indexes.get(i);
                    index.add(session, row);
                    checkRowCount(session, index, 0);
                }
            } catch (DbException e2) {
                // this could happen, for example on failure in the storage
                // but if that is not the case it means there is something wrong
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        while (tablesAndViews != null && tablesAndViews.size() > 0) {
            Table obj = (Table) tablesAndViews.values().toArray()[0];
            database.removeSchemaObject(session, obj);
        }
        while (indexes != null && indexes.size() > 0) {
            Index obj = (Index) indexes.values().toArray()[0];
            database.removeSchemaObject(session, obj);
        }
        while (sequences != null && sequences.size() > 0) {
            Sequence obj = (Sequence) sequences.values().toArray()[0];
            database.removeSchemaObject(session, obj);
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     * @param session the session
     * @param name the object name
     * @return the object or null
     */
    public Index findIndex(Session session, String name) {
        Index index = indexes.get(name);
        if (index == null) {
            index = session.findLocalTempTableIndex(name);
        }
        return index;
    }
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    }

    public void truncate(Session session) {
        lastModificationId = database.getNextModificationDataId();
        for (int i = indexes.size() - 1; i >= 0; i--) {
            Index index = indexes.get(i);
            index.truncate(session);
        }
        rowCount = 0;
        changesSinceAnalyze = 0;
    }
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     * @param name the index name
     * @return the index
     * @throws DbException if no such object exists
     */
    public Index getIndex(String name) {
        Index index = indexes.get(name);
        if (index == null) {
            throw DbException.get(ErrorCode.INDEX_NOT_FOUND_1, name);
        }
        return index;
    }
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            database.lockMeta(session);
        }
        super.removeChildrenAndResources(session);
        // go backwards because database.removeIndex will call table.removeIndex
        while (indexes.size() > 1) {
            Index index = indexes.get(1);
            if (index.getName() != null) {
                database.removeSchemaObject(session, index);
            }
        }
        if (SysProperties.CHECK) {
            for (SchemaObject obj : database.getAllSchemaObjects(DbObject.INDEX)) {
                Index index = (Index) obj;
                if (index.getTable() == this) {
                    DbException.throwInternalError("index not dropped: " + index.getName());
                }
            }
        }
        scanIndex.remove(session);
        database.removeMeta(session, getId());
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                AlterTableDropConstraint command = new AlterTableDropConstraint(session, getSchema(), ifExists);
                command.setConstraintName(constraintName);
                return command;
            } else if (readIf("PRIMARY")) {
                read("KEY");
                Index idx = table.getPrimaryKey();
                DropIndex command = new DropIndex(session, table.getSchema());
                command.setIndexName(idx.getName());
                return command;
            } else {
                readIf("COLUMN");
                boolean ifExists = readIfExists(false);
                AlterTableAlterColumn command = new AlterTableAlterColumn(session, table.getSchema());
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        }
        ArrayList<Index> indexesToDrop = New.arrayList();
        ArrayList<Index> indexes = getIndexes();
        if (indexes != null) {
            for (int i = 0, size = indexes.size(); i < size; i++) {
                Index index = indexes.get(i);
                if (index.getCreateSQL() == null) {
                    continue;
                }
                if (index.getColumnIndex(col) < 0) {
                    continue;
                }
                if (index.getColumns().length == 1) {
                    indexesToDrop.add(index);
                } else {
                    throw DbException.get(ErrorCode.COLUMN_IS_REFERENCED_1, index.getSQL());
                }
            }
        }
        for (Constraint c : constraintsToDrop) {
            session.getDatabase().removeSchemaObject(session, c);
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        item.setIndex(getScanIndex(session));
        item.cost = item.getIndex().getCost(session, null);
        ArrayList<Index> indexes = getIndexes();
        if (indexes != null && masks != null) {
            for (int i = 1, size = indexes.size(); i < size; i++) {
                Index index = indexes.get(i);
                double cost = index.getCost(session, masks);
                if (cost < item.cost) {
                    item.cost = cost;
                    item.setIndex(index);
                }
            }
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     */
    public Index findPrimaryKey() {
        ArrayList<Index> indexes = getIndexes();
        if (indexes != null) {
            for (int i = 0, size = indexes.size(); i < size; i++) {
                Index idx = indexes.get(i);
                if (idx.getIndexType().isPrimaryKey()) {
                    return idx;
                }
            }
        }
        return null;
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