标签：spark-sql

2012-04-19admin阅读(1340)赞(0)

Cost-Based Optimization (CBO) of Logical Query Plan

2012-04-18admin阅读(1311)赞(0)

EquivalentExpressions EquivalentExpressions is…​FIXME Table 1. EquivalentExpressions’s Interna ...

2012-04-17admin阅读(1807)赞(0)

Subexpression Elimination In Code-Generated Expression Evaluation (Common Expression Reuse)

2012-04-16admin阅读(1477)赞(0)

Adaptive Query Execution Adaptive Query Execution (aka Adaptive Query Optimisation or Adaptive Optimisation) is an ...

2012-04-15admin阅读(1488)赞(0)

Hint Framework Structured queries can be optimized using Hint Framework that allows for specifying query hints. ...

2012-04-14admin阅读(1513)赞(0)

Subqueries (Subquery Expressions) As of Spark 2.0, Spark SQL supports subqueries. A subquery (aka subquery expre ...

2012-04-13admin阅读(1368)赞(0)

DataSource API V2 DataSource API V2 (aka DataSource V2) is a new Data Source API (that will eventually replace the ...

2012-04-12admin阅读(1639)赞(0)

SpecificParquetRecordReaderBase — Hadoop RecordReader

2012-04-11admin阅读(2121)赞(0)

VectorizedParquetRecordReader VectorizedParquetRecordReader is a SpecificParquetRecordReaderBase for parquet file ...

2012-04-10admin阅读(2609)赞(0)

Vectorized Parquet Reader Vectorized Parquet Reader (aka Vectorized Parquet Decoding) allows for reading datasets ...