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# Predefined Constants

The constants below are defined by this extension, and will only be available when the extension has either been compiled into PHP or dynamically loaded at runtime.

## db++ error codes

DB++ Error Codes
PHP Constant | db++ constant | meaning
--- | --- | ---
`DBPLUS_ERR_NOERR` (integer) | ERR_NOERR | Null error condition
`DBPLUS_ERR_DUPLICATE` (integer) | ERR_DUPLICATE | Tried to insert a duplicate tuple
`DBPLUS_ERR_EOSCAN` (integer) | ERR_EOSCAN | End of scan from rget()
`DBPLUS_ERR_EMPTY` (integer) | ERR_EMPTY | Relation is empty (server)
`DBPLUS_ERR_CLOSE` (integer) | ERR_CLOSE | The server can't close
`DBPLUS_ERR_WLOCKED` (integer) | ERR_WLOCKED | The record is write locked
`DBPLUS_ERR_LOCKED` (integer) | ERR_LOCKED | Relation was already locked
`DBPLUS_ERR_NOLOCK` (integer) | ERR_NOLOCK | Relation cannot be locked
`DBPLUS_ERR_READ` (integer) | ERR_READ | Read error on relation
`DBPLUS_ERR_WRITE` (integer) | ERR_WRITE | Write error on relation
`DBPLUS_ERR_CREATE` (integer) | ERR_CREATE | Create() system call failed
`DBPLUS_ERR_LSEEK` (integer) | ERR_LSEEK | Lseek() system call failed
`DBPLUS_ERR_LENGTH` (integer) | ERR_LENGTH | Tuple exceeds maximum length
`DBPLUS_ERR_OPEN` (integer) | ERR_OPEN | Open() system call failed
`DBPLUS_ERR_WOPEN` (integer) | ERR_WOPEN | Relation already opened for writing
`DBPLUS_ERR_MAGIC` (integer) | ERR_MAGIC | File is not a relation
`DBPLUS_ERR_VERSION` (integer) | ERR_VERSION | File is a very old relation
`DBPLUS_ERR_PGSIZE` (integer) | ERR_PGSIZE | Relation uses a different page size
`DBPLUS_ERR_CRC` (integer) | ERR_CRC | Invalid crc in the superpage
`DBPLUS_ERR_PIPE` (integer) | ERR_PIPE | Piped relation requires lseek()
`DBPLUS_ERR_NIDX` (integer) | ERR_NIDX | Too many secondary indices
`DBPLUS_ERR_MALLOC` (integer) | ERR_MALLOC | Malloc() call failed
`DBPLUS_ERR_NUSERS` (integer) | ERR_NUSERS | Error use of max users
`DBPLUS_ERR_PREEXIT` (integer) | ERR_PREEXIT | Caused by invalid usage
`DBPLUS_ERR_ONTRAP` (integer) | ERR_ONTRAP | Caused by a signal
`DBPLUS_ERR_PREPROC` (integer) | ERR_PREPROC | Error in the preprocessor
`DBPLUS_ERR_DBPARSE` (integer) | ERR_DBPARSE | Error in the parser
`DBPLUS_ERR_DBRUNERR` (integer) | ERR_DBRUNERR | Run error in db
`DBPLUS_ERR_DBPREEXIT` (integer) | ERR_DBPREEXIT | Exit condition caused by prexit() * procedure
`DBPLUS_ERR_WAIT` (integer) | ERR_WAIT | Wait a little (Simple only)
`DBPLUS_ERR_CORRUPT_TUPLE` (integer) | ERR_CORRUPT_TUPLE | A client sent a corrupt tuple
`DBPLUS_ERR_WARNING0` (integer) | ERR_WARNING0 | The Simple routines encountered a non fatal error which was corrected
`DBPLUS_ERR_PANIC` (integer) | ERR_PANIC | The server should not really die but after a disaster send ERR_PANIC to all its clients
`DBPLUS_ERR_FIFO` (integer) | ERR_FIFO | Can't create a fifo
`DBPLUS_ERR_PERM` (integer) | ERR_PERM | Permission denied
`DBPLUS_ERR_TCL` (integer) | ERR_TCL | TCL_error
`DBPLUS_ERR_RESTRICTED` (integer) | ERR_RESTRICTED | Only two users
`DBPLUS_ERR_USER` (integer) | ERR_USER | An error in the use of the library by an application programmer
`DBPLUS_ERR_UNKNOWN` (integer) | ERR_UNKNOWN |

Resource Types
DB++ Functions
DB++
PHP Manual