You must code SQL statements within the margins that are specified by the MARGINS parameter on the CRTSQLCI or CRTSQLCPPI command.
If the MARGINS parameter is specified as *SRCFILE, the record length of the source file will be used. If a value is specified for the right margin and that value is larger than the source record length, the entire record will be read. The value will also apply to any included members. For example, if a right margin of 200 is specified and the source file has a record length of 80, only 80 columns of data will be read from the source file. If an included source member in the same precompile has a record length of 200, the entire 200 from the include will be read.
If EXEC SQL does not start within the specified margins, the SQL precompiler does not recognize the SQL statement.