com.datastax.driver.core.querybuilder.Select.perPartitionLimit()方法的使用及代码示例

x33g5p2x  于2022-01-30 转载在 其他  
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本文整理了Java中com.datastax.driver.core.querybuilder.Select.perPartitionLimit()方法的一些代码示例，展示了Select.perPartitionLimit()的具体用法。这些代码示例主要来源于Github/Stackoverflow/Maven等平台，是从一些精选项目中提取出来的代码，具有较强的参考意义，能在一定程度帮忙到你。Select.perPartitionLimit()方法的具体详情如下：
包路径：com.datastax.driver.core.querybuilder.Select
类名称：Select
方法名：perPartitionLimit

Select.perPartitionLimit介绍

[英]Adds a PER PARTITION LIMIT clause to this statement.

Note: support for PER PARTITION LIMIT clause is only available from Cassandra 3.6 onwards.
[中]将每个分区的限制子句添加到此语句中。
注：对每个分区限制条款的支持仅在Cassandra 3.6之后提供。

代码示例

代码示例来源：origin: com.datastax.cassandra/cassandra-driver-core

/**
 * Adds a bind marker for the {@code PER PARTITION LIMIT} clause to the {@code SELECT} statement
 * this {@code WHERE} clause is part of.
 *
 * <p>Note: support for {@code PER PARTITION LIMIT} clause is only available from Cassandra 3.6
 * onwards.
 *
 * @param limit the bind marker to use as limit per partition.
 * @return the {@code SELECT} statement this {@code WHERE} clause is part of.
 * @throws IllegalStateException if a {@code PER PARTITION LIMIT} clause has already been
 *     provided.
 * @throws IllegalStateException if this statement is a {@code SELECT DISTINCT} statement.
 */
public Select perPartitionLimit(BindMarker limit) {
 return statement.perPartitionLimit(limit);
}

代码示例来源：origin: com.datastax.cassandra/cassandra-driver-core

/**
 * Adds a {@code PER PARTITION LIMIT} clause to the {@code SELECT} statement this {@code WHERE}
 * clause is part of.
 *
 * <p>Note: support for {@code PER PARTITION LIMIT} clause is only available from Cassandra 3.6
 * onwards.
 *
 * @param perPartitionLimit the limit to set per partition.
 * @return the {@code SELECT} statement this {@code WHERE} clause is part of.
 * @throws IllegalArgumentException if {@code perPartitionLimit <= 0}.
 * @throws IllegalStateException if a {@code PER PARTITION LIMIT} clause has already been
 *     provided.
 * @throws IllegalStateException if this statement is a {@code SELECT DISTINCT} statement.
 */
public Select perPartitionLimit(int perPartitionLimit) {
 return statement.perPartitionLimit(perPartitionLimit);
}

代码示例来源：origin: com.facebook.presto.cassandra/cassandra-driver

/**
 * Adds a bind marker for the {@code PER PARTITION LIMIT} clause to the {@code SELECT} statement this
 * {@code WHERE} clause if part of.
 * <p>
 * Note: support for {@code PER PARTITION LIMIT} clause is only available from
 * Cassandra 3.6 onwards.
 *
 * @param limit the bind marker to use as limit per partition.
 * @return the {@code SELECT} statement this {@code WHERE} clause if part of.
 * @throws IllegalStateException if a {@code PER PARTITION LIMIT} clause has already been
 *                               provided.
 * @throws IllegalStateException if this statement is a {@code SELECT DISTINCT} statement.
 */
public Select perPartitionLimit(BindMarker limit) {
  return statement.perPartitionLimit(limit);
}

代码示例来源：origin: io.prestosql.cassandra/cassandra-driver

/**
 * Adds a bind marker for the {@code PER PARTITION LIMIT} clause to the {@code SELECT} statement this
 * {@code WHERE} clause if part of.
 * <p>
 * Note: support for {@code PER PARTITION LIMIT} clause is only available from
 * Cassandra 3.6 onwards.
 *
 * @param limit the bind marker to use as limit per partition.
 * @return the {@code SELECT} statement this {@code WHERE} clause if part of.
 * @throws IllegalStateException if a {@code PER PARTITION LIMIT} clause has already been
 *                               provided.
 * @throws IllegalStateException if this statement is a {@code SELECT DISTINCT} statement.
 */
public Select perPartitionLimit(BindMarker limit) {
  return statement.perPartitionLimit(limit);
}

代码示例来源：origin: com.yugabyte/cassandra-driver-core

/**
 * Adds a bind marker for the {@code PER PARTITION LIMIT} clause to the {@code SELECT} statement this
 * {@code WHERE} clause if part of.
 * <p>
 * Note: support for {@code PER PARTITION LIMIT} clause is only available from
 * Cassandra 3.6 onwards.
 *
 * @param limit the bind marker to use as limit per partition.
 * @return the {@code SELECT} statement this {@code WHERE} clause if part of.
 * @throws IllegalStateException if a {@code PER PARTITION LIMIT} clause has already been
 *                               provided.
 * @throws IllegalStateException if this statement is a {@code SELECT DISTINCT} statement.
 */
public Select perPartitionLimit(BindMarker limit) {
  return statement.perPartitionLimit(limit);
}

代码示例来源：origin: com.yugabyte/cassandra-driver-core

/**
 * Adds a {@code PER PARTITION LIMIT} clause to the {@code SELECT} statement this
 * {@code WHERE} clause if part of.
 * <p>
 * Note: support for {@code PER PARTITION LIMIT} clause is only available from
 * Cassandra 3.6 onwards.
 *
 * @param perPartitionLimit the limit to set per partition.
 * @return the {@code SELECT} statement this {@code WHERE} clause if part of.
 * @throws IllegalArgumentException if {@code perPartitionLimit <= 0}.
 * @throws IllegalStateException    if a {@code PER PARTITION LIMIT} clause has already been
 *                                  provided.
 * @throws IllegalStateException    if this statement is a {@code SELECT DISTINCT} statement.
 */
public Select perPartitionLimit(int perPartitionLimit) {
  return statement.perPartitionLimit(perPartitionLimit);
}

代码示例来源：origin: com.facebook.presto.cassandra/cassandra-driver

/**
 * Adds a {@code PER PARTITION LIMIT} clause to the {@code SELECT} statement this
 * {@code WHERE} clause if part of.
 * <p>
 * Note: support for {@code PER PARTITION LIMIT} clause is only available from
 * Cassandra 3.6 onwards.
 *
 * @param perPartitionLimit the limit to set per partition.
 * @return the {@code SELECT} statement this {@code WHERE} clause if part of.
 * @throws IllegalArgumentException if {@code perPartitionLimit <= 0}.
 * @throws IllegalStateException    if a {@code PER PARTITION LIMIT} clause has already been
 *                                  provided.
 * @throws IllegalStateException    if this statement is a {@code SELECT DISTINCT} statement.
 */
public Select perPartitionLimit(int perPartitionLimit) {
  return statement.perPartitionLimit(perPartitionLimit);
}

代码示例来源：origin: io.prestosql.cassandra/cassandra-driver

/**
 * Adds a {@code PER PARTITION LIMIT} clause to the {@code SELECT} statement this
 * {@code WHERE} clause if part of.
 * <p>
 * Note: support for {@code PER PARTITION LIMIT} clause is only available from
 * Cassandra 3.6 onwards.
 *
 * @param perPartitionLimit the limit to set per partition.
 * @return the {@code SELECT} statement this {@code WHERE} clause if part of.
 * @throws IllegalArgumentException if {@code perPartitionLimit <= 0}.
 * @throws IllegalStateException    if a {@code PER PARTITION LIMIT} clause has already been
 *                                  provided.
 * @throws IllegalStateException    if this statement is a {@code SELECT DISTINCT} statement.
 */
public Select perPartitionLimit(int perPartitionLimit) {
  return statement.perPartitionLimit(perPartitionLimit);
}

代码示例来源：origin: com.datastax.cassandra/cassandra-driver-core

@Test(groups = "unit")
public void should_handle_per_partition_limit_clause() {
 assertThat(select().all().from("foo").perPartitionLimit(2).toString())
   .isEqualTo("SELECT * FROM foo PER PARTITION LIMIT 2;");
 assertThat(select().all().from("foo").perPartitionLimit(bindMarker()).toString())
   .isEqualTo("SELECT * FROM foo PER PARTITION LIMIT ?;");
 assertThat(select().all().from("foo").perPartitionLimit(bindMarker("limit")).toString())
   .isEqualTo("SELECT * FROM foo PER PARTITION LIMIT :limit;");
 assertThat(select().all().from("foo").perPartitionLimit(2).limit(bindMarker()).toString())
   .isEqualTo("SELECT * FROM foo PER PARTITION LIMIT 2 LIMIT ?;");
 assertThat(
       .where(eq("a", bindMarker()))
       .orderBy(desc("b"))
       .perPartitionLimit(2)
       .limit(3)
       .toString())
       .and(gt("b", bindMarker()))
       .orderBy(desc("b"))
       .perPartitionLimit(bindMarker())
       .limit(3)
       .allowFiltering()
     "SELECT * FROM foo WHERE a=? AND b>? ORDER BY b DESC PER PARTITION LIMIT ? LIMIT 3 ALLOW FILTERING;");
 try {
  select().distinct().all().from("foo").perPartitionLimit(3);
  fail("Should not allow DISTINCT + PER PARTITION LIMIT");
 } catch (Exception e) {

代码示例来源：origin: com.datastax.cassandra/cassandra-driver-core

.from(table)
        .groupBy("a", "b")
        .perPartitionLimit(1)))
.containsExactly(row(1, 2, 6, 2L, 12), row(2, 2, 6, 1L, 6), row(4, 8, 24, 1L, 24));
        .from(table)
        .groupBy("a", "b")
        .perPartitionLimit(1)
        .limit(2)))
.containsExactly(row(1, 2, 6, 2L, 12), row(2, 2, 6, 1L, 6));
        .where(eq("a", 1))
        .groupBy("a", "b", "c")
        .perPartitionLimit(2)))
.containsExactly(row(1, 2, 6, 1L, 6), row(1, 2, 12, 1L, 12));
        .groupBy("a", "b", "c")
        .orderBy(desc("b"), desc("c"))
        .perPartitionLimit(1)))
.containsExactly(row(1, 4, 24, 2L, 24));
        .where(in("a", 1, 2, 4))
        .groupBy("a", "b", "c")
        .perPartitionLimit(1)))
.containsExactly(row(1, 2, 6, 1L, 6), row(2, 2, 6, 1L, 6), row(4, 8, 24, 1L, 24));
        .where(in("a", 1, 2, 4))
        .groupBy("a", "b", "c")
        .perPartitionLimit(2)))

代码示例来源：origin: com.datastax.cassandra/cassandra-driver-core

@Test(groups = "short")
public void should_support_per_partition_limit() throws Exception {
 assertThat(session().execute(select().all().from("test_ppl").perPartitionLimit(2)))
   .contains(
     row(0, 0, 0),
     row(4, 1, 1));
 assertThat(session().execute(select().all().from("test_ppl").perPartitionLimit(2).limit(6)))
   .hasSize(6);
 assertThat(session().execute(select().all().from("test_ppl").perPartitionLimit(2).limit(5)))
   .contains(row(0, 0, 0), row(0, 1, 1), row(1, 0, 0), row(1, 1, 1), row(2, 0, 0));
           .where(eq("a", bindMarker()))
           .orderBy(desc("b"))
           .perPartitionLimit(bindMarker())
           .getQueryString(),
         2,
           .and(gt("b", bindMarker()))
           .orderBy(desc("b"))
           .perPartitionLimit(bindMarker())
           .allowFiltering()
           .getQueryString(),

代码示例来源：origin: com.datastax.dse/dse-java-driver-core

@Test(groups = "unit")
public void should_handle_per_partition_limit_clause() {
 assertThat(select().all().from("foo").perPartitionLimit(2).toString())
   .isEqualTo("SELECT * FROM foo PER PARTITION LIMIT 2;");
 assertThat(select().all().from("foo").perPartitionLimit(bindMarker()).toString())
   .isEqualTo("SELECT * FROM foo PER PARTITION LIMIT ?;");
 assertThat(select().all().from("foo").perPartitionLimit(bindMarker("limit")).toString())
   .isEqualTo("SELECT * FROM foo PER PARTITION LIMIT :limit;");
 assertThat(select().all().from("foo").perPartitionLimit(2).limit(bindMarker()).toString())
   .isEqualTo("SELECT * FROM foo PER PARTITION LIMIT 2 LIMIT ?;");
 assertThat(
       .where(eq("a", bindMarker()))
       .orderBy(desc("b"))
       .perPartitionLimit(2)
       .limit(3)
       .toString())
       .and(gt("b", bindMarker()))
       .orderBy(desc("b"))
       .perPartitionLimit(bindMarker())
       .limit(3)
       .allowFiltering()
     "SELECT * FROM foo WHERE a=? AND b>? ORDER BY b DESC PER PARTITION LIMIT ? LIMIT 3 ALLOW FILTERING;");
 try {
  select().distinct().all().from("foo").perPartitionLimit(3);
  fail("Should not allow DISTINCT + PER PARTITION LIMIT");
 } catch (Exception e) {

代码示例来源：origin: com.datastax.dse/dse-java-driver-core

.from(table)
        .groupBy("a", "b")
        .perPartitionLimit(1)))
.containsExactly(row(1, 2, 6, 2L, 12), row(2, 2, 6, 1L, 6), row(4, 8, 24, 1L, 24));
        .from(table)
        .groupBy("a", "b")
        .perPartitionLimit(1)
        .limit(2)))
.containsExactly(row(1, 2, 6, 2L, 12), row(2, 2, 6, 1L, 6));
        .where(eq("a", 1))
        .groupBy("a", "b", "c")
        .perPartitionLimit(2)))
.containsExactly(row(1, 2, 6, 1L, 6), row(1, 2, 12, 1L, 12));
        .groupBy("a", "b", "c")
        .orderBy(desc("b"), desc("c"))
        .perPartitionLimit(1)))
.containsExactly(row(1, 4, 24, 2L, 24));
        .where(in("a", 1, 2, 4))
        .groupBy("a", "b", "c")
        .perPartitionLimit(1)))
.containsExactly(row(1, 2, 6, 1L, 6), row(2, 2, 6, 1L, 6), row(4, 8, 24, 1L, 24));
        .where(in("a", 1, 2, 4))
        .groupBy("a", "b", "c")
        .perPartitionLimit(2)))

代码示例来源：origin: com.datastax.dse/dse-java-driver-core

@Test(groups = "short")
public void should_support_per_partition_limit() throws Exception {
 assertThat(session().execute(select().all().from("test_ppl").perPartitionLimit(2)))
   .contains(
     row(0, 0, 0),
     row(4, 1, 1));
 assertThat(session().execute(select().all().from("test_ppl").perPartitionLimit(2).limit(6)))
   .hasSize(6);
 assertThat(session().execute(select().all().from("test_ppl").perPartitionLimit(2).limit(5)))
   .contains(row(0, 0, 0), row(0, 1, 1), row(1, 0, 0), row(1, 1, 1), row(2, 0, 0));
           .where(eq("a", bindMarker()))
           .orderBy(desc("b"))
           .perPartitionLimit(bindMarker())
           .getQueryString(),
         2,
           .and(gt("b", bindMarker()))
           .orderBy(desc("b"))
           .perPartitionLimit(bindMarker())
           .allowFiltering()
           .getQueryString(),

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