示例#1
0
  public JE_Table(TableMeta schema, IRepository repo) {
    super(schema, repo);
    indexCodecMap = new HashMap<String, KVCodec>();

    KVCodec pkCodec = null;
    IndexMeta pkIndex = getSchema().getPrimaryIndex();

    if (pkCodec == null) {
      pkCodec = new KVCodec();
      pkCodec.setKey_codec(
          CodecFactory.getInstance(CodecFactory.FIXED_LENGTH).getCodec((pkIndex.getKeyColumns())));
      if (pkIndex.getValueColumns() != null) {
        pkCodec.setValue_codec(
            CodecFactory.getInstance(CodecFactory.FIXED_LENGTH)
                .getCodec((pkIndex.getValueColumns())));
      }
    }

    indexCodecMap.put(pkIndex.getName(), pkCodec);

    for (IndexMeta secondIndex : getSchema().getSecondaryIndexes()) {
      KVCodec secCodec = new KVCodec();
      secCodec.setKey_codec(
          CodecFactory.getInstance(CodecFactory.FIXED_LENGTH)
              .getCodec((secondIndex.getKeyColumns())));
      if (secondIndex.getValueColumns() != null) {
        secCodec.setValue_codec(
            CodecFactory.getInstance(CodecFactory.FIXED_LENGTH)
                .getCodec((secondIndex.getValueColumns())));
      }
      indexCodecMap.put(secondIndex.getName(), secCodec);
    }
  }
示例#2
0
  /**
   * NAME=1的选择性显然比SCHOOL>1好,所以选择二级索引NAME
   *
   * @throws QueryException
   */
  @Test
  public void testChooseIndex列出现的顺序不影响索引选择() throws QueryException {
    TableNode table1 = new TableNode("TABLE1");
    QueryTreeNode qn1 = table1.query("SCHOOL>1&&NAME=1");
    qn1.build();

    IndexMeta index =
        IndexChooser.findBestIndex(
            table1.getTableMeta(),
            table1.getColumnsRefered(),
            toDNFFilter(table1.getWhereFilter()),
            table1.getTableName(),
            extraCmd);

    Assert.assertNotNull(index);
    Assert.assertEquals(index.getName(), "TABLE1._NAME");

    TableNode table2 = new TableNode("TABLE1");
    QueryTreeNode qn2 = table2.query("NAME=1&&SCHOOL>1");
    qn2.build();

    index =
        IndexChooser.findBestIndex(
            table2.getTableMeta(),
            table2.getColumnsRefered(),
            toDNFFilter(table2.getWhereFilter()),
            table2.getTableName(),
            extraCmd);

    Assert.assertNotNull(index);
    Assert.assertEquals(index.getName(), "TABLE1._NAME");
  }
示例#3
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  @Override
  public CloneableRecord get(
      ExecutionContext context, CloneableRecord key, IndexMeta indexMeta, String dbName) {

    DatabaseEntry keyEntry = new DatabaseEntry();
    DatabaseEntry valueEntry = new DatabaseEntry();
    keyEntry.setData(indexCodecMap.get(indexMeta.getName()).getKey_codec().encode(key));
    OperationStatus status =
        getDatabase(dbName)
            .get(
                context.getTransaction() == null
                    ? null
                    : ((JE_Transaction) context.getTransaction()).txn,
                keyEntry,
                valueEntry,
                LockMode.DEFAULT);
    if (OperationStatus.SUCCESS != status) {
      return null;
    }
    if (valueEntry.getSize() != 0) {
      return indexCodecMap.get(indexMeta.getName()).getValue_codec().decode(valueEntry.getData());
    } else {
      return null;
    }
  }
示例#4
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  /**
   * todo:触发更新二级索引
   *
   * @param key
   * @param value
   * @throws TddlException
   */
  @Override
  public void put(
      ExecutionContext context,
      CloneableRecord key,
      CloneableRecord value,
      IndexMeta indexMeta,
      String dbName)
      throws TddlException {
    DatabaseEntry keyEntry = new DatabaseEntry();
    DatabaseEntry valueEntry = new DatabaseEntry();
    keyEntry.setData(indexCodecMap.get(indexMeta.getName()).getKey_codec().encode(key));

    // 当临时表排序时候可能会用到临时表join,主键插入值为null
    // if (keyEntry.getData().length == 1 && !isTempTable) {
    // throw new RuntimeException("pk must not null.");
    // }

    if (value != null) {
      valueEntry.setData(indexCodecMap.get(indexMeta.getName()).getValue_codec().encode(value));
    } else {
      valueEntry = emptyValueEntry;
    }
    try {
      ITransaction transaction = context.getTransaction();
      com.sleepycat.je.Transaction txn = null;
      if (transaction != null && transaction instanceof JE_Transaction) {
        txn = ((JE_Transaction) transaction).txn;
      }
      OperationStatus operationStatus = getDatabase(dbName).put(txn, keyEntry, valueEntry);
      if (operationStatus.equals(OperationStatus.SUCCESS)) {
        return;
      }
    } catch (LockTimeoutException ex) {

      throw ex;
    } catch (ReplicaWriteException ex) {
      throw new TddlException(ExceptionErrorCodeUtils.Read_only, ex);
    }
  }
示例#5
0
  /** 虽然C1,C2上存在组合索引,但是由于范围查询的选择度不如等值查询 因此还是选择了单索引NAME=1 */
  @Test
  public void testChooseIndex单索引选择度好于组合索引() throws QueryException {
    TableNode table = new TableNode("TABLE9");
    QueryTreeNode qn = table.query("C1>10&&C2>3&&NAME=1");
    qn.build();

    IndexMeta index =
        IndexChooser.findBestIndex(
            table.getTableMeta(),
            table.getColumnsRefered(),
            toDNFFilter(table.getWhereFilter()),
            table.getTableName(),
            extraCmd);

    Assert.assertNotNull(index);
    Assert.assertEquals(index.getName(), "TABLE9._NAME");
  }
示例#6
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  @Test
  public void testChooseIndex() throws QueryException {
    TableNode table = new TableNode("TABLE1");
    QueryTreeNode qn = table.query("ID=1");
    qn.build();

    IndexMeta index =
        IndexChooser.findBestIndex(
            table.getTableMeta(),
            emptyColumns,
            toDNFFilter(table.getWhereFilter()),
            table.getTableName(),
            extraCmd);

    Assert.assertNotNull(index);
    Assert.assertEquals(index.getName(), "TABLE1");
  }
示例#7
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  /** C6,C7同时存在组合索引和倒排索引 同时有倒排和组合索引,并且选择度一样,优先选择组合 */
  @Test
  public void testChooseIndex选择度相同优先选组合() throws QueryException {
    TableNode table = new TableNode("TABLE9");
    QueryTreeNode qn = table.query("C6=10&&C7=3");
    qn.build();

    IndexMeta index =
        IndexChooser.findBestIndex(
            table.getTableMeta(),
            table.getColumnsRefered(),
            toDNFFilter(table.getWhereFilter()),
            table.getTableName(),
            extraCmd);

    Assert.assertNotNull(index);
    Assert.assertEquals(index.getName(), "TABLE9._C6_C7");
  }
示例#8
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  @Override
  public void delete(
      ExecutionContext context, CloneableRecord key, IndexMeta indexMeta, String dbName)
      throws TddlException {

    DatabaseEntry keyEntry = new DatabaseEntry();
    keyEntry.setData(indexCodecMap.get(indexMeta.getName()).getKey_codec().encode(key));
    try {
      getDatabase(dbName)
          .delete(
              context.getTransaction() == null
                  ? null
                  : ((JE_Transaction) context.getTransaction()).txn,
              keyEntry);
    } catch (LockTimeoutException ex) {

      throw ex;
    } catch (ReplicaWriteException ex) {
      throw new TddlException(ExceptionErrorCodeUtils.Read_only, ex);
    }
  }