TSQL debug breakpoint interoperability across heterogeneous project systems within an IDE can be provided. A user can set a breakpoint in the user's SQL source code and the breakpoint can be triggered by the code within another project. Breakpoints can be set and triggered within SQL source code tiles that reside in one or more SQL Database projects. Binding of the application project being debugged with one or more SQL Database projects that reside within the IDE session can be automated, SQL artifacts not found in any of the SQL Database projects can be debugged.