normanj-bitquill commented on code in PR #3762:
URL: https://github.com/apache/calcite/pull/3762#discussion_r1571315674
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core/src/main/java/org/apache/calcite/sql/fun/SqlLibraryOperators.java:
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@@ -2216,7 +2216,39 @@ private static RelDataType
deriveTypeMapFromEntries(SqlOperatorBinding opBinding
@LibraryOperator(libraries = {BIG_QUERY, SPARK})
public static final SqlFunction POW =
- SqlStdOperatorTable.POWER.withName("POW");
+ SqlBasicFunction.create("POW",
+ ReturnTypes.DOUBLE_NULLABLE,
+ OperandTypes.NUMERIC_NUMERIC,
+ SqlFunctionCategory.NUMERIC);
+
+ /** The {@code POWER(numeric, numeric)} function.
+ *
+ * <p>The return type is always {@code DOUBLE} since we don't know
+ * what the result type will be by just looking at the operand types. For
+ * example {@code POWER(INTEGER, INTEGER)} can return a non-INTEGER if the
+ * second operand is negative.
+ */
+ @LibraryOperator(libraries = { BIG_QUERY, CALCITE, HIVE, MSSQL, MYSQL,
ORACLE, SNOWFLAKE,
+ SPARK })
+ public static final SqlFunction POWER =
+ SqlBasicFunction.create("POWER",
+ ReturnTypes.DOUBLE_NULLABLE,
+ OperandTypes.NUMERIC_NUMERIC,
+ SqlFunctionCategory.NUMERIC);
+
+ /** The {@code POWER(numeric, numeric)} function.
+ *
+ * <p>The return type is always {@code DOUBLE} since we don't know
Review Comment:
Updated the comment.
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