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Jing Zhang commented on CALCITE-4865: ------------------------------------- I'm very sorry for pushing. Please review the pull request when you have time. [~julianhyde][~danny0405] Thanks a lot. > Extends Table function to support Polymorphic Table Function > ------------------------------------------------------------ > > Key: CALCITE-4865 > URL: https://issues.apache.org/jira/browse/CALCITE-4865 > Project: Calcite > Issue Type: Sub-task > Components: core > Reporter: Jing Zhang > Priority: Major > Labels: pull-request-available > Attachments: image-2021-12-07-11-04-28-206.png > > Time Spent: 1h > Remaining Estimate: 0h > > This Jira aims to extend existed Table function in order to support > Polymorphic Table Function, including: > * Introduces generic input table parameter which has 3 characteristics: > ## Input tables have either row semantics or set semantics) > ### Row semantics means that the the result of the PTF is decided on a > row-by-row basis. > ### Set semantics means that the outcome of the function depends on how the > data is partitioned. > ## The second characteristic, which applies only to input tables with set > semantics, is whether the PTF can generate a result row even if the input > table is empty. > ## The third characteristic is whether the input table supports pass-through > columns or not. Pass-through columns is a mechanism enabling the PTF to copy > every column of an input row into columns of an output row. > * Introduces generic input table parameter which has 3 characteristics: > * Extends `SqlFunction` to support generic input table parameter > * Adds validator for table function > ## only input table parameter with set semantics could be partitioned or > ordered > ## At most has one input table parameter with row semantics > * Updates `Parser.jj` to allow partition by clause and order by clause > follow after input table parameter of table function > * Adds test -- This message was sent by Atlassian Jira (v8.20.1#820001)