Examples of org.lealone.dbobject.table.TableFilter

org.lealone.dbobject.table.TableFilter
A table filter represents a table that is used in a query. There is one such object whenever a table (or view) is used in a query. For example the following query has 2 table filters: SELECT * FROM TEST T1, TEST T2.

            parseSelectSimpleSelectPart(command);
            if (!readIf("FROM")) {
                // select without FROM: convert to SELECT ... FROM
                // SYSTEM_RANGE(1,1)
                Table dual = getDualTable(false);
                TableFilter filter = new TableFilter(session, dual, null, rightsChecked, currentSelect);
                command.addTableFilter(filter, true);
            } else {
                parseSelectSimpleFromPart(command);
            }
        }

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                                    leftCol.mapColumns(f, 0);
                                    rightCol.mapColumns(f, 0);
                                    f = f.getJoin();
                                }
                            }
                            TableFilter leftFilter = leftCol.getTableFilter();
                            TableFilter rightFilter = rightCol.getTableFilter();
                            r = new Comparison(session, compareType, r, right);
                            if (leftFilter != null && rightFilter != null) {
                                int idx = filters.indexOf(rightFilter);
                                if (idx >= 0) {
                                    filters.remove(idx);
                                    leftFilter.addJoin(rightFilter, true, false, r);
                                } else {
                                    rightFilter.mapAndAddFilter(r);
                                }
                                r = ValueExpression.get(ValueBoolean.get(true));
                            }
                        }
                    } else {

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    }


    private Select parseValues() {
        Select command = createSelect(session);
        currentSelect = command;
        TableFilter filter = parseValuesTable();
        ArrayList<Expression> list = New.arrayList();
        list.add(new Wildcard(null, null));
        command.setExpressions(list);
        command.addTableFilter(filter, true);
        command.init();

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            tf.setParameter(i, list);
        }
        tf.setColumns(columns);
        tf.doneWithParameters();
        Table table = new FunctionTable(mainSchema, session, tf, tf);
        TableFilter filter = new TableFilter(session, table, null, rightsChecked, currentSelect);
        return filter;
    }

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                    Wildcard c2 = new Wildcard(filter.getTable().getSchema().getName(), filter.getTableAlias());
                    expressions.add(i++, c2);
                }
                i = temp - 1;
            } else {
                TableFilter filter = null;
                for (TableFilter f : filters) {
                    if (db.equalsIdentifiers(tableAlias, f.getTableAlias())) {
                        if (schemaName == null || db.equalsIdentifiers(schemaName, f.getSchemaName())) {
                            filter = f;
                            break;
                        }
                    }
                }
                if (filter == null) {
                    throw DbException.get(ErrorCode.TABLE_OR_VIEW_NOT_FOUND_1, tableAlias);
                }
                Table t = filter.getTable();
                String alias = filter.getTableAlias();
                expressions.remove(i);
                Column[] columns = t.getColumns();
                for (Column c : columns) {
                    if (filter.isNaturalJoinColumn(c)) {
                        continue;
                    }
                    ExpressionColumn ec = new ExpressionColumn(session.getDatabase(), null, alias, c.getColumnFamilyName(),
                            c.getName());
                    expressions.add(i++, ec);

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        return set;
    }


    public void fireBeforeSelectTriggers() {
        for (int i = 0, size = filters.size(); i < size; i++) {
            TableFilter filter = filters.get(i);
            filter.getTable().fire(session, Trigger.SELECT, true);
        }
    }

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        for (; f != null; f = f.getJoin()) {
            f.setEvaluatable(f, true);
            if (condition != null) {
                condition.setEvaluatable(f, true);
            }
            TableFilter n = f.getNestedJoin();
            if (n != null) {
                setEvaluatableRecursive(n);
            }
            Expression on = f.getJoinCondition();
            if (on != null) {

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            buff.appendExceptFirst(",");
            buff.append('\n');
            buff.append(StringUtils.indent(exprList[i].getSQL(isDistributed), 4, false));
        }
        buff.append("\nFROM ");
        TableFilter filter = topTableFilter;
        if (filter != null) {
            buff.resetCount();
            int i = 0;
            do {
                buff.appendExceptFirst("\n");
                buff.append(filter.getPlanSQL(i++ > 0));
                filter = filter.getJoin();
            } while (filter != null);
        } else {
            buff.resetCount();
            int i = 0;
            for (TableFilter f : topFilters) {

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        case ExpressionVisitor.DETERMINISTIC: {
            if (isForUpdate) {
                return false;
            }
            for (int i = 0, size = filters.size(); i < size; i++) {
                TableFilter f = filters.get(i);
                if (!f.getTable().isDeterministic()) {
                    return false;
                }
            }
            break;
        }
        case ExpressionVisitor.SET_MAX_DATA_MODIFICATION_ID: {
            for (int i = 0, size = filters.size(); i < size; i++) {
                TableFilter f = filters.get(i);
                long m = f.getTable().getMaxDataModificationId();
                visitor.addDataModificationId(m);
            }
            break;
        }
        case ExpressionVisitor.EVALUATABLE: {
            if (!session.getDatabase().getSettings().optimizeEvaluatableSubqueries) {
                return false;
            }
            break;
        }
        case ExpressionVisitor.GET_DEPENDENCIES: {
            for (int i = 0, size = filters.size(); i < size; i++) {
                TableFilter f = filters.get(i);
                Table table = f.getTable();
                visitor.addDependency(table);
                table.addDependencies(visitor.getDependencies());
            }
            break;
        }

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                            if (ca == null) {
                                found = false;
                                if (filters != null) {
                                    // select id from test order by test.id
                                    for (int i = 0, size = filters.size(); i < size; i++) {
                                        TableFilter f = filters.get(i);
                                        if (db.equalsIdentifiers(f.getTableAlias(), tableAlias)) {
                                            found = true;
                                            break;
                                        }
                                    }
                                }

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Related Classes of org.lealone.dbobject.table.TableFilter

org.lealone.command.ddl.AlterTableAddConstraint

org.lealone.command.dml.Optimizer

org.lealone.command.dml.Query

org.lealone.command.dml.Select

org.lealone.command.Parser

org.lealone.dbobject.index.IndexCondition

org.lealone.dbobject.index.IndexCursor

org.lealone.expression.Aggregate

org.lealone.expression.ConditionAndOr

org.lealone.expression.Expression

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