cloud-fan commented on code in PR #49726:
URL: https://github.com/apache/spark/pull/49726#discussion_r1955489998
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sql/core/src/main/scala/org/apache/spark/sql/scripting/SqlScriptingExecutionNode.scala:
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@@ -1020,3 +1024,107 @@ class ExceptionHandlerExec(
override def reset(): Unit = body.reset()
}
+
+/**
+ * Executable node for Signal Statement.
+ * @param errorCondition Name of the error condition/SQL State for error that
will be thrown.
+ * @param sqlState SQL State of the error that will be thrown.
+ * @param message Error message (either string or variable name).
+ * @param isBuiltinError Whether the error condition is a builtin condition.
+ * @param msgArguments Error message parameters for builtin conditions.
+ * @param session Spark session that SQL script is executed within.
+ * @param origin Origin descriptor for the statement.
+ */
+class SignalStatementExec(
+ val errorCondition: String,
+ val sqlState: String,
+ val message: Either[String, UnresolvedAttribute],
+ val msgArguments: Option[UnresolvedAttribute],
+ val isBuiltinError: Boolean,
+ val session: SparkSession,
+ override val origin: Origin)
+ extends LeafStatementExec
+ with ColumnResolutionHelper with WithOrigin {
Review Comment:
The execution node of SIGNAL just gets the string value by calling `.eval()`
of the message expression, which can be either literal or variables.
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