Examples with Limit com.dangdang.ddframe.rdb.sharding.parser.result.merger.Limit used on opensource projects

Example 1 with Limit

use of com.dangdang.ddframe.rdb.sharding.parser.result.merger.Limit in project sharding-jdbc by dangdangdotcom.

the class AbstractBaseParseTest method getDataParameter.

private static Object[] getDataParameter(final Assert assertObj) {
    Object[] result = new Object[6];
    result[0] = assertObj.getId();
    result[1] = assertObj.getSql();
    result[2] = assertObj.getExpectedSQL();
    result[3] = Lists.transform(assertObj.getTables(), new Function<com.dangdang.ddframe.rdb.sharding.parser.jaxb.Table, Table>() {

        @Override
        public Table apply(final com.dangdang.ddframe.rdb.sharding.parser.jaxb.Table input) {
            return new Table(input.getName(), input.getAlias());
        }
    });
    if (null == assertObj.getConditionContexts()) {
        result[4] = Collections.<ConditionContext>emptyList();
    } else {
        result[4] = Lists.transform(assertObj.getConditionContexts(), new Function<com.dangdang.ddframe.rdb.sharding.parser.jaxb.ConditionContext, ConditionContext>() {

            @Override
            public ConditionContext apply(final com.dangdang.ddframe.rdb.sharding.parser.jaxb.ConditionContext input) {
                ConditionContext result = new ConditionContext();
                if (null == input.getConditions()) {
                    return result;
                }
                for (com.dangdang.ddframe.rdb.sharding.parser.jaxb.Condition each : input.getConditions()) {
                    Condition condition = new Condition(new Column(each.getColumnName(), each.getTableName()), BinaryOperator.valueOf(each.getOperator().toUpperCase()));
                    condition.getValues().addAll(Lists.transform(each.getValues(), new Function<Value, Comparable<?>>() {

                        @Override
                        public Comparable<?> apply(final Value input) {
                            return input.getValueWithType();
                        }
                    }));
                    if (null != each.getValueIndices()) {
                        condition.getValueIndices().addAll(each.getValueIndices());
                    }
                    result.add(condition);
                }
                return result;
            }
        });
    }
    MergeContext mergeContext = new MergeContext();
    if (null != assertObj.getOrderByColumns()) {
        mergeContext.getOrderByColumns().addAll(Lists.transform(assertObj.getOrderByColumns(), new Function<com.dangdang.ddframe.rdb.sharding.parser.jaxb.OrderByColumn, OrderByColumn>() {

            @Override
            public OrderByColumn apply(final com.dangdang.ddframe.rdb.sharding.parser.jaxb.OrderByColumn input) {
                return Strings.isNullOrEmpty(input.getName()) ? new OrderByColumn(input.getIndex(), OrderByType.valueOf(input.getOrderByType().toUpperCase())) : new OrderByColumn(Optional.fromNullable(input.getOwner()), input.getName(), Optional.fromNullable(input.getAlias()), OrderByType.valueOf(input.getOrderByType().toUpperCase()));
            }
        }));
    }
    if (null != assertObj.getGroupByColumns()) {
        mergeContext.getGroupByColumns().addAll(Lists.transform(assertObj.getGroupByColumns(), new Function<com.dangdang.ddframe.rdb.sharding.parser.jaxb.GroupByColumn, GroupByColumn>() {

            @Override
            public GroupByColumn apply(final com.dangdang.ddframe.rdb.sharding.parser.jaxb.GroupByColumn input) {
                return new GroupByColumn(Optional.fromNullable(input.getOwner()), input.getName(), Optional.fromNullable(input.getAlias()), OrderByType.valueOf(input.getOrderByType().toUpperCase()));
            }
        }));
    }
    if (null != assertObj.getAggregationColumns()) {
        mergeContext.getAggregationColumns().addAll(Lists.transform(assertObj.getAggregationColumns(), new Function<com.dangdang.ddframe.rdb.sharding.parser.jaxb.AggregationColumn, AggregationColumn>() {

            @Override
            public AggregationColumn apply(final com.dangdang.ddframe.rdb.sharding.parser.jaxb.AggregationColumn input) {
                AggregationColumn result = new AggregationColumn(input.getExpression(), AggregationType.valueOf(input.getAggregationType().toUpperCase()), Optional.fromNullable(input.getAlias()), Optional.fromNullable(input.getOption()));
                if (null != input.getIndex()) {
                    result.setColumnIndex(input.getIndex());
                }
                for (com.dangdang.ddframe.rdb.sharding.parser.jaxb.AggregationColumn each : input.getDerivedColumns()) {
                    result.getDerivedColumns().add(new AggregationColumn(each.getExpression(), AggregationType.valueOf(each.getAggregationType().toUpperCase()), Optional.fromNullable(each.getAlias()), Optional.fromNullable(each.getOption())));
                }
                return result;
            }
        }));
    }
    if (null != assertObj.getLimit()) {
        mergeContext.setLimit(new Limit(assertObj.getLimit().getOffset(), assertObj.getLimit().getRowCount(), assertObj.getLimit().getOffsetParameterIndex(), assertObj.getLimit().getRowCountParameterIndex()));
    }
    result[5] = mergeContext;
    return result;
}

Example 2 with Limit

use of com.dangdang.ddframe.rdb.sharding.parser.result.merger.Limit in project sharding-jdbc by dangdangdotcom.

the class SQLParsedResultTest method generateMergeContext.

private void generateMergeContext(final MergeContext mergeContext) {
    mergeContext.getAggregationColumns().add(new AggregationColumn("COUNT(id)", AggregationType.COUNT, Optional.of("c"), Optional.<String>absent()));
    mergeContext.getOrderByColumns().add(new OrderByColumn(Optional.<String>absent(), "id", Optional.of("a"), OrderByType.DESC));
    mergeContext.getGroupByColumns().add(new GroupByColumn(Optional.<String>absent(), "id", Optional.of("d"), OrderByType.ASC));
    mergeContext.setLimit(new Limit(0, 10, -1, -1));
}

Example 3 with Limit

use of com.dangdang.ddframe.rdb.sharding.parser.result.merger.Limit in project sharding-jdbc by dangdangdotcom.

the class IteratorResultSetTest method assertNextWithLimitForPartData.

@Test
public void assertNextWithLimitForPartData() throws SQLException {
    MergeContext mergeContext = new MergeContext();
    mergeContext.setLimit(new Limit(1, 1, -1, -1));
    ResultSet resultSet = ResultSetFactory.getResultSet(Arrays.<ResultSet>asList(new MockResultSet<>(1), new MockResultSet<>(2, 4), new MockResultSet<Integer>()), mergeContext);
    int count = 0;
    while (resultSet.next()) {
        count++;
    }
    assertThat(count, is(1));
}

Example 4 with Limit

use of com.dangdang.ddframe.rdb.sharding.parser.result.merger.Limit in project sharding-jdbc by dangdangdotcom.

the class SQLRouteEngine method amendSQLAccordingToRouteResult.

private void amendSQLAccordingToRouteResult(final SQLParsedResult parsedResult, final List<Object> parameters, final SQLRouteResult result) {
    boolean isVarious = result.getExecutionUnits().size() > 1;
    Limit limit = result.getMergeContext().getLimit();
    SQLBuilder sqlBuilder = parsedResult.getRouteContext().getSqlBuilder();
    if (null != limit) {
        limit.replaceSQL(sqlBuilder, isVarious);
        limit.replaceParameters(parameters, isVarious);
    }
    if (!isVarious) {
        sqlBuilder.removeDerivedSQL();
    }
}

Example 5 with Limit

use of com.dangdang.ddframe.rdb.sharding.parser.result.merger.Limit in project sharding-jdbc by dangdangdotcom.

the class MySQLSelectVisitor method visit.

/**
     * LIMIT 解析.
     * 
     * @param x LIMIT表达式
     * @return false 停止遍历AST
     */
@Override
public boolean visit(final MySqlSelectQueryBlock.Limit x) {
    if (getParseContext().getParseContextIndex() > 0) {
        return super.visit(x);
    }
    print("LIMIT ");
    int offset = 0;
    int offSetIndex = -1;
    if (null != x.getOffset()) {
        if (x.getOffset() instanceof SQLNumericLiteralExpr) {
            offset = ((SQLNumericLiteralExpr) x.getOffset()).getNumber().intValue();
            printToken(Limit.OFFSET_NAME, String.valueOf(offset));
            print(", ");
        } else {
            offset = ((Number) getParameters().get(((SQLVariantRefExpr) x.getOffset()).getIndex())).intValue();
            offSetIndex = ((SQLVariantRefExpr) x.getOffset()).getIndex();
            print("?, ");
        }
    }
    int rowCount;
    int rowCountIndex = -1;
    if (x.getRowCount() instanceof SQLNumericLiteralExpr) {
        rowCount = ((SQLNumericLiteralExpr) x.getRowCount()).getNumber().intValue();
        printToken(Limit.COUNT_NAME, String.valueOf(rowCount));
    } else {
        rowCount = ((Number) getParameters().get(((SQLVariantRefExpr) x.getRowCount()).getIndex())).intValue();
        rowCountIndex = ((SQLVariantRefExpr) x.getRowCount()).getIndex();
        print("?");
    }
    if (offset < 0 || rowCount < 0) {
        throw new SQLParserException("LIMIT offset and row count can not be a negative value");
    }
    // "LIMIT {rowCount} OFFSET {offset}" will transform to "LIMIT {offset}, {rowCount}".So exchange parameter index
    if (offSetIndex > -1 && rowCountIndex > -1 && offSetIndex > rowCountIndex) {
        int tmp = rowCountIndex;
        rowCountIndex = offSetIndex;
        offSetIndex = tmp;
    }
    getParseContext().getParsedResult().getMergeContext().setLimit(new Limit(offset, rowCount, offSetIndex, rowCountIndex));
    return false;
}