Compiled Python UDFs for Impala
2. Impala User-‐defined FuncAons (UDFs) • Tuple => Scalar value • Substring • sin, cos, pow, … • Machine-‐learning models • Supports Hive UDFs (Java) • RelaAvely unpleasurable • Slower • Impala (naAve) UDFs • C++ interface designed for efficiency • Similar to Postgres UDFs • Runs any LLVM-‐compiled code 2 4. LLVM: C++ example 4 bool StringEq(FunctionContext* context,! const StringVal& a
Hue - Hadoop User Experience - The Apache Hadoop UI — Tutorial: Executing Hive or Impala Queries with Python
Tutorial: Executing Hive or Impala Queries with Python This post talks about Hue, a UI for making Apache Hadoop easier to use. Hue uses a various set of interfaces for communicating with the Hadoop components. This post describes how Hue is implementing the Apache HiveServer2 Thrift API for executing Hive queries and listing tables. The same interface can also be used for talking to Cloudera Impal
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