sql - Differences between TdOleDb and Teradata .NET provider -


in converting of our old apps tdoledb provider .net provider, i've discovered number of differences in sql that's supported. 1 of 2 examples i've come across how tdoledb allows this:

substring('abcd',2,2)

the .net provider, however, throws exception. have convert 1 of teradata's 2 supported substring functions this:

substr('abcd',2,2) substring('abcd' 2, 2)

is there way identify known differences in how parser works between these 2 providers? plan on testing everything, miss 1 or 2 sql executions, being able search our apps unsupported sql great help.

edit

here's other example found 2 providers behave differently. old oledb code executing macro commandtype.storedprocedure:

cmdquote = new oledb.oledbcommand cmdquote.connection = conquote  cmdquote.commandtype = commandtype.storedprocedure cmdquote.commandtext = "mydb.mymacro"

when change of oledb classes of .net provider, teradata throws exception:

[teradata database] [5494] 'mymacro' not stored procedure

to work .net provider, have convert this:

cmdquote = new tdcommand cmdquote.connection = conquote  cmdquote.commandtext = "execute mydb.mymacro(?)" cmdquote.parameters.add(myparam)

seems oledb supports (at least some) odbc-syntax, see

scalar functions


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