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https://issues.apache.org/jira/browse/CALCITE-4865?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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JING ZHANG updated CALCITE-4865:
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Description:
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
was:
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 semanticsa) Row semantics
means that the the result of the PTF is decided on a row-by-row basis.
b) 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.
# 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
> 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
>
> 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
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