[
https://issues.apache.org/jira/browse/CALCITE-1515?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15886589#comment-15886589
]
Julian Hyde commented on CALCITE-1515:
--------------------------------------
Sorry, I misread {{RexNode}} as {{RelNode}}.
A table function is a {{RexCall}}, so its arguments are all {{RexNode}}s, even
those that represent relational expressions. So, you convert a {{RelNode}} as a
{{RexNode}} in order to pass it into the function. The convention is to use a
{{RexInputRef}} whose ordinal is the number of {{CURSOR}} arguments to the
current function seen so far, and whose type is the row type of the relational
expression. To see how it works, put a breakpoint in
{{SqlToRelConverterTest.convertCursor}} and run
{{SqlToRelConverterTest#testCollectionTableWithCursorParam}}.
> Support TableFunctionScan in RelBuilder
> ---------------------------------------
>
> Key: CALCITE-1515
> URL: https://issues.apache.org/jira/browse/CALCITE-1515
> Project: Calcite
> Issue Type: Bug
> Affects Versions: 1.10.0
> Reporter: Anton Mushin
> Assignee: Julian Hyde
> Priority: Minor
>
> Calcite has a TableFunctionScan, which is a RelNode, takes a function, 0 or
> more RelNode inputs, and 0 or more other arguments.
> RelBuilder does not support TableFunctionScan yet.
> add In RelBuilder TableFunctionScanFactory which will create
> LogicalTableFunctionScan like as for LogicalTableScan and factory for others
> RelNodes [
> [example|https://github.com/apache/calcite/blob/master/core/src/main/java/org/apache/calcite/tools/RelBuilder.java#L125]
> ]
> also adding a functionScan method, analogous to the scan method but for table
> functions.
--
This message was sent by Atlassian JIRA
(v6.3.15#6346)
