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Java TableNode.useIndex方法代碼示例

本文整理匯總了Java中com.taobao.tddl.optimizer.core.ast.query.TableNode.useIndex方法的典型用法代碼示例。如果您正苦於以下問題:Java TableNode.useIndex方法的具體用法?Java TableNode.useIndex怎麽用?Java TableNode.useIndex使用的例子?那麽, 這裏精選的方法代碼示例或許可以為您提供幫助。您也可以進一步了解該方法所在com.taobao.tddl.optimizer.core.ast.query.TableNode的用法示例。


在下文中一共展示了TableNode.useIndex方法的8個代碼示例,這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚,您的評價將有助於係統推薦出更棒的Java代碼示例。

示例1: build

import com.taobao.tddl.optimizer.core.ast.query.TableNode; //導入方法依賴的package包/類
private void build(TableNode table) {
    table.build();

    Map<String, Object> extraCmd = new HashMap<String, Object>();
    extraCmd.put(ConnectionProperties.CHOOSE_INDEX, true);
    IndexMeta index = IndexChooser.findBestIndex(table.getTableMeta(),
        new ArrayList<ISelectable>(),
        FilterUtils.toDNFNode(table.getWhereFilter()),
        table.getTableName(),
        extraCmd);

    table.useIndex(index);

    Map<FilterType, IFilter> result = FilterSpliter.splitByIndex(FilterUtils.toDNFNode(table.getWhereFilter()),
        table);

    table.setKeyFilter(result.get(FilterType.IndexQueryKeyFilter));
    table.setIndexQueryValueFilter(result.get(FilterType.IndexQueryValueFilter));
    table.setResultFilter(result.get(FilterType.ResultFilter));
}
 
開發者ID:loye168,項目名稱:tddl5,代碼行數:21,代碼來源:JoinChooserTest.java

示例2: build

import com.taobao.tddl.optimizer.core.ast.query.TableNode; //導入方法依賴的package包/類
private void build(TableNode table) {
    table.build();

    Map<String, Object> extraCmd = new HashMap<String, Object>();
    extraCmd.put(ExtraCmd.CHOOSE_INDEX, true);
    IndexMeta index = IndexChooser.findBestIndex(table.getTableMeta(),
        new ArrayList<ISelectable>(),
        FilterUtils.toDNFNode(table.getWhereFilter()),
        table.getTableName(),
        extraCmd);

    table.useIndex(index);

    Map<FilterType, IFilter> result = FilterSpliter.splitByIndex(FilterUtils.toDNFNode(table.getWhereFilter()),
        table);

    table.setKeyFilter(result.get(FilterType.IndexQueryKeyFilter));
    table.setIndexQueryValueFilter(result.get(FilterType.IndexQueryValueFilter));
    table.setResultFilter(result.get(FilterType.ResultFilter));
}
 
開發者ID:beebeandwer,項目名稱:TDDL,代碼行數:21,代碼來源:JoinChooserTest.java

示例3: build

import com.taobao.tddl.optimizer.core.ast.query.TableNode; //導入方法依賴的package包/類
private void build(TableNode table) {
    table.build();

    Map<String, Object> extraCmd = new HashMap<String, Object>();
    extraCmd.put(ConnectionProperties.CHOOSE_INDEX, true);
    IndexMeta index = IndexChooser.findBestIndex(table.getTableMeta(),
        new ArrayList<ISelectable>(),
        FilterUtils.toDNFNode(table.getWhereFilter()),
        table.getTableName(),
        extraCmd);

    table.useIndex(index);
}
 
開發者ID:loye168,項目名稱:tddl5,代碼行數:14,代碼來源:FilterSpliterTest.java

示例4: TableNode

import com.taobao.tddl.optimizer.core.ast.query.TableNode; //導入方法依賴的package包/類
@Test
public void testChooseIndex手動指定索引() {
    TableNode table = new TableNode("TABLE9");
    table.build();
    table.useIndex(table.getTableMeta().getIndexs().get(0));
    table.build();
    System.out.println(table.toDataNodeExecutor());
}
 
開發者ID:loye168,項目名稱:tddl5,代碼行數:9,代碼來源:IndexChooserTest.java

示例5: build

import com.taobao.tddl.optimizer.core.ast.query.TableNode; //導入方法依賴的package包/類
private void build(TableNode table) {
    table.build();

    Map<String, Object> extraCmd = new HashMap<String, Object>();
    extraCmd.put(ExtraCmd.CHOOSE_INDEX, true);
    IndexMeta index = IndexChooser.findBestIndex(table.getTableMeta(),
        new ArrayList<ISelectable>(),
        FilterUtils.toDNFNode(table.getWhereFilter()),
        table.getTableName(),
        extraCmd);

    table.useIndex(index);
}
 
開發者ID:beebeandwer,項目名稱:TDDL,代碼行數:14,代碼來源:FilterSpliterTest.java

示例6: TableNode

import com.taobao.tddl.optimizer.core.ast.query.TableNode; //導入方法依賴的package包/類
@Test
public void testChooseIndex手動指定索引() throws QueryException {
    TableNode table = new TableNode("TABLE9");
    table.build();
    table.useIndex(table.getTableMeta().getIndexs().get(0));
    table.build();
    System.out.println(table.toDataNodeExecutor());
}
 
開發者ID:beebeandwer,項目名稱:TDDL,代碼行數:9,代碼來源:IndexChooserTest.java

示例7: splitByDNF

import com.taobao.tddl.optimizer.core.ast.query.TableNode; //導入方法依賴的package包/類
/**
 * 根據where中的所有條件按照or進行分隔,生成多個query請求. (主要考慮部分存儲引擎不支持or語法)
 */
public static List<QueryTreeNode> splitByDNF(TableNode node, Map<String, Object> extraCmd) {
    if (node.getWhereFilter() == null) {
        return new LinkedList<QueryTreeNode>();
    }

    if (!FilterUtils.isDNF(node.getWhereFilter())) {
        throw new IllegalArgumentException("not dnf!!! fuck!!\n" + node.getWhereFilter());
    }

    List<QueryTreeNode> subQueries = new LinkedList<QueryTreeNode>();
    List<List<IFilter>> DNFNodes = FilterUtils.toDNFNodesArray(node.getWhereFilter());
    // 判斷是否要處理OR轉化為index merge,比如mysql可以push
    // 比如hbase/bdb這一類,OR條件目前隻能是主鍵索引,由執行器層麵去解決
    // 如果涉及多字段時就需要拆分為index merge,同時做uniq
    boolean needCopy = (DNFNodes.size() > 1);
    if (isOptimizeIndexMerge(extraCmd) || DNFNodes.size() == 1) {
        for (List<IFilter> DNFNode : DNFNodes) {
            List columns = Arrays.asList(FilterUtils.toColumnFiltersMap(DNFNode).keySet().toArray());
            String tablename = node.getTableName();
            IndexMeta index = IndexChooser.findBestIndex(node.getTableMeta(), columns, DNFNode, tablename, extraCmd);
            if (index == null) {
                index = node.getTableMeta().getPrimaryIndex();
            }
            // 如果找不到對應條件的主鍵,可能需要全表掃描
            TableNode subQuery = node;
            if (needCopy) {
                subQuery = node.deepCopy();
            }

            subQuery.useIndex(index);
            if (index == null) {// 如果無主鍵進行全表掃描
                subQuery.setFullTableScan(true);
            } else {
                subQuery.query((IFilter) null);// 清空where
            }

            Map<FilterType, IFilter> filters = splitByIndex(DNFNode, subQuery);
            subQuery.setKeyFilter(filters.get(FilterType.IndexQueryKeyFilter));
            subQuery.setIndexQueryValueFilter(filters.get(FilterType.IndexQueryValueFilter));
            subQuery.setResultFilter(filters.get(FilterType.ResultFilter));
            subQueries.add(subQuery);
        }
    } else {
        node.useIndex(node.getTableMeta().getPrimaryIndex());// 默認選中主鍵
        node.setResultFilter(node.getWhereFilter());
    }

    return subQueries;
}
 
開發者ID:loye168,項目名稱:tddl5,代碼行數:53,代碼來源:FilterSpliter.java

示例8: splitByDNF

import com.taobao.tddl.optimizer.core.ast.query.TableNode; //導入方法依賴的package包/類
/**
 * 根據where中的所有條件按照or進行分隔,生成多個query請求. (主要考慮部分存儲引擎不支持or語法)
 */
public static List<QueryTreeNode> splitByDNF(TableNode node, Map<String, Object> extraCmd) throws QueryException {
    if (node.getWhereFilter() == null) {
        return new LinkedList<QueryTreeNode>();
    }

    if (!FilterUtils.isDNF(node.getWhereFilter())) {
        throw new IllegalArgumentException("not dnf!!! fuck!!\n" + node.getWhereFilter());
    }

    List<QueryTreeNode> subQueries = new LinkedList<QueryTreeNode>();
    List<List<IFilter>> DNFNodes = FilterUtils.toDNFNodesArray(node.getWhereFilter());
    // 判斷是否要處理OR轉化為index merge,比如mysql可以push
    // 比如hbase/bdb這一類,OR條件目前隻能是主鍵索引,由執行器層麵去解決
    // 如果涉及多字段時就需要拆分為index merge,同時做uniq
    boolean needCopy = (DNFNodes.size() > 1);
    if (isOptimizeIndexMerge(extraCmd) || DNFNodes.size() == 1) {
        for (List<IFilter> DNFNode : DNFNodes) {
            List columns = Arrays.asList(FilterUtils.toColumnFiltersMap(DNFNode).keySet().toArray());
            String tablename = node.getTableName();
            IndexMeta index = IndexChooser.findBestIndex(node.getTableMeta(), columns, DNFNode, tablename, extraCmd);
            if (index == null) {
                index = node.getTableMeta().getPrimaryIndex();
            }
            // 如果找不到對應條件的主鍵,可能需要全表掃描
            TableNode subQuery = node;
            if (needCopy) {
                subQuery = node.deepCopy();
            }

            subQuery.useIndex(index);
            if (index == null) {// 如果無主鍵進行全表掃描
                subQuery.setFullTableScan(true);
            }

            Map<FilterType, IFilter> filters = splitByIndex(DNFNode, subQuery);
            subQuery.setKeyFilter(filters.get(FilterType.IndexQueryKeyFilter));
            subQuery.setIndexQueryValueFilter(filters.get(FilterType.IndexQueryValueFilter));
            subQuery.setResultFilter(filters.get(FilterType.ResultFilter));
            subQueries.add(subQuery);
        }
    } else {
        node.useIndex(node.getTableMeta().getPrimaryIndex());// 默認選中主鍵
        node.setResultFilter(node.getWhereFilter());
    }

    return subQueries;
}
 
開發者ID:beebeandwer,項目名稱:TDDL,代碼行數:51,代碼來源:FilterSpliter.java


注:本文中的com.taobao.tddl.optimizer.core.ast.query.TableNode.useIndex方法示例由純淨天空整理自Github/MSDocs等開源代碼及文檔管理平台,相關代碼片段篩選自各路編程大神貢獻的開源項目,源碼版權歸原作者所有,傳播和使用請參考對應項目的License;未經允許,請勿轉載。