[FLINK-10263] User-defined function with LITERAL paramters yields CompileException

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6.1, 1.7.0
• Fix Version/s: 1.6.2, 1.7.0
• Component/s: Table SQL / API
• Labels: pull-request-available
• Assignee: Timo Walther
• Reporter: Fabian Hueske
• Created: 30/Aug/18 15:56
• Updated: 17/Oct/18 08:47
• Resolved: 26/Sep/18 08:18

Description

When using a user-defined scalar function only with literal parameters, a CompileException is thrown. For example

SELECT myFunc(CAST(40.750444 AS FLOAT), CAST(-73.993475 AS FLOAT))

public class MyFunc extends ScalarFunction {

	public int eval(float lon, float lat) {
		// do something
	}
}

results in

[ERROR] Could not execute SQL statement. Reason:
org.codehaus.commons.compiler.CompileException: Line 5, Column 10: Cannot determine simple type name "com"

The problem is probably caused by the expression reducer because it disappears if a regular attribute is added to a parameter expression.

Issue Links

• links to: GitHub Pull Request #6725