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Khai Tran commented on CALCITE-3122: ------------------------------------ The failed test is not critical. The reason is somehow CALCITE 3138 prevents my rule PigToSqlAggregateRule from being applied to produced a bit more optimized plan for multiset projection. But with the non-optimized plan, we can still execute and produce SQL for it. I added a TODO in [this commit|https://github.com/khaitranq/calcite-1/commit/200f5b5462bfa6439afecc1238ad2e63d3282462] as I'm not sure if it's worth to create a JIRA. We just miss a minor optimization for an uncommon use case. > Convert Pig Latin scripts into Calcite logical plan > ---------------------------------------------------- > > Key: CALCITE-3122 > URL: https://issues.apache.org/jira/browse/CALCITE-3122 > Project: Calcite > Issue Type: New Feature > Components: core, piglet > Reporter: Khai Tran > Assignee: Julian Hyde > Priority: Major > Labels: pull-request-available > Fix For: 1.21.0 > > Time Spent: 1h 10m > Remaining Estimate: 0h > > We create an internal Calcite repo at LinkedIn and develop APIs to parse any > Pig Latin scripts into Calcite logical plan. The code was tested in nearly > ~1000 Pig scripts written at LinkedIn. > Changes: > 1. piglet: main conversion code live there, include: > * APIs to convert any Pig scripts into RelNode plans or SQL statements > * Use Pig Grunt parser to parse Pig Latin scripts into Pig logical plan > (DAGs) > * Convert Pig schemas into RelDatatype > * Traverse through Pig expression plan and convert Pig expressions into > RexNodes > * Map some basic Pig UDFs to Calcite SQL operators > * Build Calcite UDFs for any other Pig UDFs, including UDFs written in both > Java and Python > * Traverse (DFS) through Pig logical plans to convert each Pig logical nodes > to RelNodes > * Have an optimizer rule to optimize Pig group/cogroup into Aggregate > operators > 2. core: > * Implement other RelNode in Rel2Sql so that Pig can be translated into SQL > * Other minor changes in a few other classes to make Pig to Calcite works -- This message was sent by Atlassian Jira (v8.3.2#803003)