Feng Zhu created CALCITE-3077:
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Summary: Rewrite CUBE&ROLLUP&CUBE queries in SparkSqlDialect
Key: CALCITE-3077
URL: https://issues.apache.org/jira/browse/CALCITE-3077
Project: Calcite
Issue Type: Bug
Components: core
Affects Versions: 1.20.0
Reporter: Feng Zhu
*Backgroung:* we are building a platform that adopts Calcite to process (i.e.,
parse&validate&convert&optimize) SQL queries and then regenerate the final SQL.
For the purpose of handling large volume data, we use the popular SparkSQL
engine to execute the generated SQL query.
However, we found a great part of real-world test cases failed, due to syntax
differences of
*_CUBE/ROLLUP/GROUPING SETS_* clauses. Spark SQL dialect supports only "WITH
ROLLUP&CUBE" in the "GROUP BY" clause. The corresponding grammer [1] is defined
as below.
{code:java}
aggregation
: GROUP BY groupingExpressions+=expression (','
groupingExpressions+=expression)* (
WITH kind=ROLLUP
| WITH kind=CUBE
| kind=GROUPING SETS '(' groupingSet (',' groupingSet)* ')')?
| GROUP BY kind=GROUPING SETS '(' groupingSet (',' groupingSet)* ')'
;
{code}
[1]https://github.com/apache/spark/blob/master/sql/catalyst/src/main/antlr4/org/apache/spark/sql/catalyst/parser/SqlBase.g4
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