For more information, see Chapter 8 of the Programmer's Guide to the Oracle Precompilers. However, if you use an indicator variable, PL/SQL sets it to the original length of the string. This might not be what you want, so be careful. FORTRAN datatypes must be compatible with the source/target database column. If your system uses file extensions but you do not specify one, the Pro*FORTRAN Precompiler assumes the default extension for source files (usually FOR or F). In the following example, three host arrays are declared, each with an upper dimension bound of 50 (the lower bound defaults to 1): You cannot specify a lower dimension bound for host arrays. where expression can be a constant, another variable or a formula (The card reader or keyboard was usually connected as unit 5). This chapter contains the following sections: This chapter provides the basic information you need to write a Pro*FORTRAN program, including: language-specific features and restrictions, how to declare and reference host variables, indicator variables, host arrays, and variable-length strings. You can also specify multiple paths on the command line, as follows: When multiple paths are specified, the precompiler searches the current directory first, then the path1 directory, then the path2 directory, and so on. When MODE=ORACLE, the program interface strips trailing blanks before sending the value to the database. You can place FORTRAN comment lines within SQL statements. The following example shows all three styles of comments: You cannot nest comments. Host variable equivalencing is useful in several ways. There is a separate Fortran
that may have constant value.
FORTRAN uses apostrophes to delimit string literals, as in, SQL also uses apostrophes to delimit string literals, as in, But SQL uses quotation marks to delimit identifiers containing special or lowercase characters, as in. One-dimensional arrays of FORTRAN types are also supported. length, blanks will be added (padded) on the right. To take advantage of the automatic logon feature, you simply pass a slash (/) character to the precompiler, as follows: This automatically connects you as user OPS$username. For example, the following usage is invalid: Also, you cannot dimension a host array in a COMMON statement.
information at compilation time only, and do not from left to right. For example, you can DECLARE a cursor in one program unit, OPEN it in another, FETCH from it in yet another, and CLOSE it in still another as long as they are in the same file. For example, if your operating system username is RHILL, and OPS$RHILL is a valid Oracle username, connecting with a slash (/) automatically logs you on to Oracle as user OPS$RHILL. You use the datatype names in datatype equivalencing, and you use the datatype codes in dynamic SQL Method 4. Inside a PL/SQL block, host variables are global to the entire block and can be used anywhere a PL/SQL variable is allowed.
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