Java SqlSingleValueAggFunction类代码示例

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本文整理汇总了Java中org.apache.calcite.sql.fun.SqlSingleValueAggFunction类的典型用法代码示例。如果您正苦于以下问题：Java SqlSingleValueAggFunction类的具体用法？Java SqlSingleValueAggFunction怎么用？Java SqlSingleValueAggFunction使用的例子？那么恭喜您, 这里精选的类代码示例或许可以为您提供帮助。

SqlSingleValueAggFunction类属于org.apache.calcite.sql.fun包，在下文中一共展示了SqlSingleValueAggFunction类的8个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于我们的系统推荐出更棒的Java代码示例。

示例1: visit

import org.apache.calcite.sql.fun.SqlSingleValueAggFunction; //导入依赖的package包/类
@Override
public RelNode visit(LogicalAggregate aggregate) {
  for(AggregateCall aggregateCall : aggregate.getAggCallList()) {
    if(aggregateCall.getAggregation() instanceof SqlSingleValueAggFunction) {
      unsupportedOperatorCollector.setException(SqlUnsupportedException.ExceptionType.FUNCTION,
          "Non-scalar sub-query used in an expression\n" +
          "See Apache Drill JIRA: DRILL-1937");
      throw new UnsupportedOperationException();
    }
  }

  return visitChild(aggregate, 0, aggregate.getInput());
}

开发者ID:skhalifa，项目名称:QDrill，代码行数:14，代码来源:PreProcessLogicalRel.java

示例2: visit

import org.apache.calcite.sql.fun.SqlSingleValueAggFunction; //导入依赖的package包/类
@Override
public RelNode visit(LogicalAggregate aggregate) {
  for(AggregateCall aggregateCall : aggregate.getAggCallList()) {
    if(aggregateCall.getAggregation() instanceof SqlSingleValueAggFunction) {
      // see DRILL-1937
      unsupportedOperatorCollector.setException(SqlUnsupportedException.ExceptionType.FUNCTION,
          "Dremio doesn't currently support non-scalar sub-queries used in an expression");
      throw new UnsupportedOperationException();
    }
  }
  return visitChild(aggregate, 0, aggregate.getInput());
}

开发者ID:dremio，项目名称:dremio-oss，代码行数:13，代码来源:PreProcessRel.java

示例3: onMatch

import org.apache.calcite.sql.fun.SqlSingleValueAggFunction; //导入依赖的package包/类
public void onMatch(RelOptRuleCall call) {
	LogicalAggregate singleAggregate = call.rel(0);
	LogicalProject project = call.rel(1);
	LogicalAggregate aggregate = call.rel(2);

	// check singleAggRel is single_value agg
	if ((!singleAggregate.getGroupSet().isEmpty()) || (singleAggregate.getAggCallList().size() != 1) || !(singleAggregate.getAggCallList().get(0).getAggregation() instanceof SqlSingleValueAggFunction)) {
		return;
	}

	// check projRel only projects one expression
	// check this project only projects one expression, i.e. scalar
	// subqueries.
	List<RexNode> projExprs = project.getProjects();
	if (projExprs.size() != 1) {
		return;
	}

	// check the input to projRel is an aggregate on the entire input
	if (!aggregate.getGroupSet().isEmpty()) {
		return;
	}

	// singleAggRel produces a nullable type, so create the new
	// projection that casts proj expr to a nullable type.
	final RelOptCluster cluster = project.getCluster();
	RelNode newProject = RelOptUtil.createProject(aggregate, ImmutableList.of(rexBuilder.makeCast(cluster.getTypeFactory().createTypeWithNullability(projExprs.get(0).getType(), true), projExprs.get(0))), null);
	call.transformTo(newProject);
}

开发者ID:axbaretto，项目名称:flink，代码行数:30，代码来源:FlinkRelDecorrelator.java

示例4: visit

import org.apache.calcite.sql.fun.SqlSingleValueAggFunction; //导入依赖的package包/类
@Override
public RelNode visit(LogicalAggregate aggregate) {
  for(AggregateCall aggregateCall : aggregate.getAggCallList()) {
    if(aggregateCall.getAggregation() instanceof SqlSingleValueAggFunction) {
      unsupportedOperatorCollector.setException(SqlUnsupportedException.ExceptionType.FUNCTION,
          "Non-scalar sub-query used in an expression\n" +
          "See Apache Drill JIRA: DRILL-1937");
      throw new UnsupportedOperationException();
    }
  }
  return visitChild(aggregate, 0, aggregate.getInput());
}

开发者ID:axbaretto，项目名称:drill，代码行数:13，代码来源:PreProcessLogicalRel.java

示例5: implement

import org.apache.calcite.sql.fun.SqlSingleValueAggFunction; //导入依赖的package包/类
public JdbcImplementor.Result implement(JdbcImplementor implementor) {
    // "select a, b, sum(x) from ( ... ) group by a, b"
    final JdbcImplementor.Result x = implementor.visitChild(0, getInput());
    final JdbcImplementor.Builder builder =
            x.builder(this, JdbcImplementor.Clause.GROUP_BY);
    List<SqlNode> groupByList = Expressions.list();
    final List<SqlNode> selectList = new ArrayList<>();
    for (int group : groupSet) {
        final SqlNode field = builder.getContext().field(group);
        addSelect(selectList, field, getRowType());
        groupByList.add(field);
    }
    for (AggregateCall aggCall : aggCalls) {
        SqlNode aggCallSqlNode = builder.getContext().toSql(aggCall);
        if (aggCall.getAggregation() instanceof SqlSingleValueAggFunction) {
            aggCallSqlNode =
                    rewriteSingleValueExpr(aggCallSqlNode, implementor.getDialect());
        }
        addSelect(selectList, aggCallSqlNode, getRowType());
    }
    builder.setSelect(new SqlNodeList(selectList, POS));
    if (!groupByList.isEmpty() || aggCalls.isEmpty()) {
        // Some databases don't support "GROUP BY ()". We can omit it as long
        // as there is at least one aggregate function.
        builder.setGroupBy(new SqlNodeList(groupByList, POS));
    }
    return builder.result();
}

开发者ID:bitnine-oss，项目名称:octopus，代码行数:29，代码来源:JdbcRules.java

示例6: visitAggregate

import org.apache.calcite.sql.fun.SqlSingleValueAggFunction; //导入依赖的package包/类
public Result visitAggregate(Aggregate e) {
  // "select a, b, sum(x) from ( ... ) group by a, b"
  final Result x = visitChild(0, e.getInput());
  final Builder builder =
      x.builder(e, Clause.GROUP_BY);
  List<SqlNode> groupByList = Expressions.list();
  final List<SqlNode> selectList = new ArrayList<>();
  for (int group : e.getGroupSet()) {
    final SqlNode field = builder.context.field(group);
    addSelect(selectList, field, e.getRowType());
    groupByList.add(field);
  }
  for (AggregateCall aggCall : e.getAggCallList()) {
    SqlNode aggCallSqlNode = builder.context.toSql(aggCall);
    if (aggCall.getAggregation() instanceof SqlSingleValueAggFunction) {
      aggCallSqlNode =
          rewriteSingleValueExpr(aggCallSqlNode, dialect);
    }
    addSelect(selectList, aggCallSqlNode, e.getRowType());
  }
  builder.setSelect(new SqlNodeList(selectList, POS));
  if (!groupByList.isEmpty() || e.getAggCallList().isEmpty()) {
    // Some databases don't support "GROUP BY ()". We can omit it as long
    // as there is at least one aggregate function.
    builder.setGroupBy(new SqlNodeList(groupByList, POS));
  }
  return builder.result();
}

开发者ID:qubole，项目名称:quark，代码行数:29，代码来源:RelToSqlConverter.java

示例7: visit

import org.apache.calcite.sql.fun.SqlSingleValueAggFunction; //导入依赖的package包/类
/** @see #dispatch */
public Result visit(Aggregate e) {
  // "select a, b, sum(x) from ( ... ) group by a, b"
  final Result x = visitChild(0, e.getInput());
  final Builder builder;
  if (e.getInput() instanceof Project) {
    builder = x.builder(e);
    builder.clauses.add(Clause.GROUP_BY);
  } else {
    builder = x.builder(e, Clause.GROUP_BY);
  }
  List<SqlNode> groupByList = Expressions.list();
  final List<SqlNode> selectList = new ArrayList<>();
  for (int group : e.getGroupSet()) {
    final SqlNode field = builder.context.field(group);
    addSelect(selectList, field, e.getRowType());
    groupByList.add(field);
  }
  for (AggregateCall aggCall : e.getAggCallList()) {
    SqlNode aggCallSqlNode = builder.context.toSql(aggCall);
    if (aggCall.getAggregation() instanceof SqlSingleValueAggFunction) {
      aggCallSqlNode = dialect.
          rewriteSingleValueExpr(aggCallSqlNode);
    }
    addSelect(selectList, aggCallSqlNode, e.getRowType());
  }
  builder.setSelect(new SqlNodeList(selectList, POS));
  if (!groupByList.isEmpty() || e.getAggCallList().isEmpty()) {
    // Some databases don't support "GROUP BY ()". We can omit it as long
    // as there is at least one aggregate function.
    builder.setGroupBy(new SqlNodeList(groupByList, POS));
  }
  return builder.result();
}

开发者ID:apache，项目名称:calcite，代码行数:35，代码来源:RelToSqlConverter.java

示例8: onMatch

import org.apache.calcite.sql.fun.SqlSingleValueAggFunction; //导入依赖的package包/类
public void onMatch(RelOptRuleCall call) {
  LogicalAggregate singleAggregate = call.rel(0);
  LogicalProject project = call.rel(1);
  LogicalAggregate aggregate = call.rel(2);

  // check singleAggRel is single_value agg
  if ((!singleAggregate.getGroupSet().isEmpty())
      || (singleAggregate.getAggCallList().size() != 1)
      || !(singleAggregate.getAggCallList().get(0).getAggregation()
      instanceof SqlSingleValueAggFunction)) {
    return;
  }

  // check projRel only projects one expression
  // check this project only projects one expression, i.e. scalar
  // sub-queries.
  List<RexNode> projExprs = project.getProjects();
  if (projExprs.size() != 1) {
    return;
  }

  // check the input to project is an aggregate on the entire input
  if (!aggregate.getGroupSet().isEmpty()) {
    return;
  }

  // singleAggRel produces a nullable type, so create the new
  // projection that casts proj expr to a nullable type.
  final RelOptCluster cluster = project.getCluster();
  RelNode newProject =
      RelOptUtil.createProject(aggregate,
          ImmutableList.of(
              rexBuilder.makeCast(
                  cluster.getTypeFactory().createTypeWithNullability(
                      projExprs.get(0).getType(),
                      true),
                  projExprs.get(0))),
          null);
  call.transformTo(newProject);
}

开发者ID:apache，项目名称:calcite，代码行数:41，代码来源:RelDecorrelator.java

注：本文中的org.apache.calcite.sql.fun.SqlSingleValueAggFunction类示例整理自Github/MSDocs等源码及文档管理平台，相关代码片段筛选自各路编程大神贡献的开源项目，源码版权归原作者所有，传播和使用请参考对应项目的License；未经允许，请勿转载。

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Java SqlSingleValueAggFunction类代码示例

示例1: visit

示例2: visit

示例3: onMatch

示例4: visit

示例5: implement

示例6: visitAggregate

示例7: visit

示例8: onMatch

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