DATE library functions
The following date-manipulation functions are in the Informix®
ESQL/C library.
They convert dates between a string format and the internal DATE format.
| Function name | Description | See |
|---|---|---|
| rdatestr() | Converts an internal DATE to a character string format | The rdatestr() function |
| rdayofweek() | Returns the day of the week of a date in internal format | The rdayofweek() function |
| rdefmtdate() | Converts a specified string format to an internal DATE | The rdefmtdate() function |
| rfmtdate() | Converts an internal DATE to a specified string format | The rfmtdate() function |
| rjulmdy() | Returns month, day, and year from a specified DATE | The rjulmdy() function |
| rleapyear() | Determines whether specified year is a leap year | The rleapyear() function |
| rmdyjul() | Returns an internal DATE from month, day, and year | The rmdyjul() function |
| rstrdate() | Converts a character string format to an internal DATE | The rstrdate() function |
| rtoday() | Returns a system date as an internal DATE | The rtoday() function |
When you compile your Informix® ESQL/C program with the esql command, esql automatically links these functions into your program.