Julian Hyde created CALCITE-1073:
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Summary: Validate function arguments in RelBuilder
Key: CALCITE-1073
URL: https://issues.apache.org/jira/browse/CALCITE-1073
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
Assignee: Julian Hyde
RelBuilder should validate function arguments. For example, if you try to
create a call to SUBSTRING, RelBuilder should make sure that the arguments are
of type VARCHAR (or CHAR), INTEGER, INTEGER.
SqlOperator has the means to validate itself, but it's a bit tricky to use it,
because those means were intended for ASTs (SqlNode). In SqlNode format the
arguments are sometimes different (e.g. CAST has 2 arguments in SqlNode format
and only one in RexNode format).
RelBuilder should also insert implicit casts, and should resolve overloaded
operators.
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