Adding Debug Points for Understanding / Partial Functions

Question

How to add debug points to expressions for understanding?

for {
  a <- sqlQuery1()
  b <- sqlQuery2()
} yield {
  // output
}

I want to check how each of the above requests is executed, but just adding debug points does not work. Queries are executed without hitting the debug points. I am not sure if this is a limitation of the library, language or IDE used.

Here is my setup:

• Scala
• IntelliJ IDEA 14.1.3
• Scala Plugin 1.5.200
• Library - Slick 3.0 (using DBIO actions)

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Update:

Case 1: with a sniff

Debug points do not work. Confirmed it again.

Case 2: without use

The debugger stops at the debugging points. But sometimes he evaluates expressions, and sometimes not. I noticed the following problems (in currying / anonymous functions):

• " =?"
• - " "
• - , ( )
• ': ...'

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, , .