danny0405 commented on a change in pull request #2230:
URL: https://github.com/apache/calcite/pull/2230#discussion_r512568956
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File path: core/src/main/java/org/apache/calcite/sql/fun/SqlItemOperator.java
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@@ -115,7 +115,8 @@ private SqlSingleOperandTypeChecker
getChecker(SqlCallBinding callBinding) {
@Override public String getAllowedSignatures(String name) {
return "<ARRAY>[<INTEGER>]\n"
- + "<MAP>[<VALUE>]";
+ + "<MAP>[<VALUE>]\n"
+ + "<ROW>[<CHARACTER>|<INTEGER>]";
}
Review comment:
I think we should use the expected data type instead of the attribute
name, so `<MAP>[< CHARACTER >]` seems better.
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