danny0405 commented on a change in pull request #1727: [CALCITE-3640] Oracle
EXISTSNODE Function Support
URL: https://github.com/apache/calcite/pull/1727#discussion_r363605077
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File path:
core/src/main/java/org/apache/calcite/sql/fun/SqlLibraryOperators.java
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@@ -190,6 +190,12 @@ private SqlLibraryOperators() {
ReturnTypes.cascade(ReturnTypes.VARCHAR_2000,
SqlTypeTransforms.FORCE_NULLABLE),
null, OperandTypes.STRING_STRING_OPTIONAL_STRING,
SqlFunctionCategory.SYSTEM);
+ @LibraryOperator(libraries = {ORACLE})
+ public static final SqlFunction EXISTS_NODE = new SqlFunction(
+ "EXISTSNODE", SqlKind.OTHER_FUNCTION,
+ ReturnTypes.cascade(ReturnTypes.INTEGER_NULLABLE,
SqlTypeTransforms.FORCE_NULLABLE),
+ null, OperandTypes.STRING_STRING_OPTIONAL_STRING,
SqlFunctionCategory.SYSTEM);
Review comment:
Do not need to cascade because `INTEGER_NULLABLE ` is nullable true.
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