ociap.h

能够连接各种数据库的API

  		1 if date1 > date2
DESCRIPTION:
The function OCIDateCompare compares two dates. It returns -1 if 
date1 is smaller than date2, 0 if they are equal, and 1 if date1 is 
greater than date2.
RETURNS:
       OCI_SUCCESS if the function completes successfully.
        OCI_INVALID_HANDLE if 'err' is NULL.
        OCI_ERROR if
  	  invalid date
	  input dates are not mutually comparable

------------------------------OCIDateTimeConvert----------------------
sword OCIDateTimeConvert(dvoid *hndl, OCIError *err, OCIDateTime *indate, 
				OCIDateTime *outdate);
NAME: OCIDateTimeConvert - Conversion between different DATETIME types
PARAMETERS:
hndl (IN) - Session/Env handle. 
err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
indate (IN) - pointer to input date
outdate (OUT) - pointer to output datetime 
DESCRIPTION: Converts one datetime type to another. The result type is
       the type of the 'outdate' descriptor.
RETURNS:
        OCI_SUCCESS if the function completes successfully.
        OCI_INVALID_HANDLE if 'err' is NULL.
	OCI_ERROR if
	    conversion not possible.
   
---------------------------- OCIDateTimeFromText-----------------------
sword OCIDateTimeFromText(dvoid *hndl, OCIError *err, CONST OraText *date_str, 
             size_t d_str_length, CONST OraText *fmt, ub1 fmt_length,
             CONST OraText *lang_name, size_t lang_length, OCIDateTime *date );
NAME: OCIDateTimeFromText - OCIDateTime convert String FROM Date
PARAMETERS:
hndl (IN) - Session/Env handle. If Session Handle is passed, the 
		    conversion takes place in session NLS_LANGUAGE and
		    session NLS_CALENDAR, otherwise the default is used.
err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
date_str (IN) - input string to be converted to Oracle date
d_str_length (IN) - size of the input string, if the length is -1
  		then 'date_str' is treated as a null terminated  string
fmt (IN) - conversion format; if 'fmt' is a null pointer, then
                the string is expected to be in the default format for
		the datetime type.
fmt_length (IN) - length of the 'fmt' parameter
lang_name (IN) - language in which the names and abbreviations of
  	        days and months are specified, if null i.e. (OraText *)0,
  		the default language of session is used, 
lang_length (IN) - length of the 'lang_name' parameter
date (OUT) - given string converted to date
DESCRIPTION:
  	Converts the given string to Oracle datetime type set in the 
        OCIDateTime descriptor according to the specified format. Refer to 
        "TO_DATE" conversion function described in "Oracle SQL Language 
        Reference Manual" for a description of format.
RETURNS:
        OCI_SUCCESS if the function completes successfully.
        OCI_INVALID_HANDLE if 'err' is NULL.
        OCI_ERROR if
  	  invalid format
  	  unknown language
  	  invalid input string

--------------------------- OCIDateTimeGetDate-------------------------
sword OCIDateTimeGetDate(dvoid *hndl, OCIError *err,  CONST OCIDateTime *date, 
	                   sb2 *year, ub1 *month, ub1 *day );
NAME: OCIDateTimeGetDate - OCIDateTime Get Date (year, month, day)  
				portion of DATETIME. 
PARAMETERS:
hndl (IN) - Session/Env handle. 
err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
datetime (IN) - Pointer to OCIDateTime 
year      (OUT) - year value
month     (OUT) - month value
day       (OUT) - day value

--------------------------- OCIDateTimeGetTime ------------------------
sword OCIDateTimeGetTime(dvoid *hndl, OCIError *err, OCIDateTime *datetime,
		 ub1 *hour, ub1 *minute, ub1 *sec, ub4 *fsec);
NAME: OCIDateTimeGetTime - OCIDateTime Get Time (hour, min, second, 
			fractional second)  of DATETIME. 
PARAMETERS:
hndl (IN) - Session/Env handle. 
err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
datetime (IN) - Pointer to OCIDateTime 
hour      (OUT) - hour value
minute       (OUT) - minute value
sec       (OUT) - second value
fsec      (OUT) - Fractional Second value

--------------------------- OCIDateTimeGetTimeZoneOffset ----------------------
sword OCIDateTimeGetTimeZoneOffset(dvoid *hndl,OCIError *err,CONST 
              OCIDateTime *datetime,sb1 *hour,sb1  *minute);

NAME: OCIDateTimeGetTimeZoneOffset - OCIDateTime Get TimeZone (hour, minute)  
                         portion of DATETIME. 
PARAMETERS:
hndl (IN) - Session/Env handle. 
err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
datetime (IN) - Pointer to OCIDateTime 
hour      (OUT) - TimeZone Hour value
minute     (OUT) - TimeZone Minute value

--------------------------- OCIDateTimeSysTimeStamp---------------------
sword OCIDateTimeSysTimeStamp(dvoid *hndl, OCIError *err, 
              OCIDateTime *sys_date );
 
NAME: OCIDateTimeSysTimeStamp - Returns system date/time as a TimeStamp with 
                      timezone
PARAMETERS:
hndl (IN) - Session/Env handle. 
err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
sys_date (OUT) - Pointer to output timestamp
 
DESCRIPTION: 
        Gets the system current date and time as a timestamp with timezone
RETURNS:
        OCI_SUCCESS if the function completes successfully.
        OCI_INVALID_HANDLE if 'err' is NULL.


------------------------------OCIDateTimeIntervalAdd----------------------
sword OCIDateTimeIntervalAdd(dvoid *hndl, OCIError *err, OCIDateTime *datetime,
	 OCIInterval *inter, OCIDateTime *outdatetime);
NAME: OCIDateTimeIntervalAdd - Adds an interval to datetime
PARAMETERS:
hndl (IN) - Session/Env handle.
err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
datetime (IN) - pointer to input datetime
inter    (IN) - pointer to interval 
outdatetime (IN) - pointer to output datetime. The output datetime 
				will be of same type as input datetime
DESCRIPTION: 
	Adds an interval to a datetime to produce a resulting datetime
RETURNS:
        OCI_SUCCESS if the function completes successfully.
        OCI_INVALID_HANDLE if 'err' is NULL.
	OCI_ERROR if:
		resulting date is before Jan 1, -4713
		resulting date is after Dec 31, 9999

------------------------------OCIDateTimeIntervalSub----------------------
sword OCIDateTimeIntervalSub(dvoid *hndl, OCIError *err, OCIDateTime *datetime,
              OCIInterval *inter, OCIDateTime *outdatetime);
NAME: OCIDateTimeIntervalSub - Subtracts an interval from a datetime
PARAMETERS:
hndl (IN) - Session/Env handle. 
err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
datetime (IN) - pointer to input datetime
inter    (IN) - pointer to interval 
outdatetime (IN) - pointer to output datetime. The output datetime 
				will be of same type as input datetime
DESCRIPTION: 
 	Subtracts an interval from a datetime and stores the result in a
     	datetime
RETURNS:
        OCI_SUCCESS if the function completes successfully.
        OCI_INVALID_HANDLE if 'err' is NULL.
	OCI_ERROR if:
		resulting date is before Jan 1, -4713
		resulting date is after Dec 31, 9999

--------------------------- OCIDateTimeConstruct-------------------------
sword OCIDateTimeConstruct(dvoid  *hndl,OCIError *err,OCIDateTime *datetime,
               sb2 year,ub1 month,ub1 day,ub1 hour,ub1 min,ub1 sec,ub4 fsec,
               OraText  *timezone,size_t timezone_length);

NAME: OCIDateTimeConstruct - Construct an OCIDateTime. Only the relevant
       fields for the OCIDateTime descriptor types are used.
PARAMETERS:
        hndl (IN) - Session/Env handle. 
        err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
        datetime (IN) - Pointer to OCIDateTime 
        year      (IN) - year value
        month     (IN) - month value
        day       (IN) - day value        
        hour      (IN) - hour value
        min       (IN) - minute value
        sec       (IN) - second value
        fsec      (IN) - Fractional Second value
        timezone  (IN) - Timezone string
        timezone_length(IN) - Length of timezone string

DESCRIPTION:
       Constructs a DateTime descriptor. The type of the datetime is the
       type of the OCIDateTime descriptor. Only the relevant fields based
       on the type are used. For Types with timezone, the date and time
       fields are assumed to be in the local time of the specified timezone.
       If timezone is not specified, then session default timezone is
       assumed.
RETURNS:
        OCI_SUCCESS if the function completes successfully.
        OCI_ERROR if datetime is not valid.

------------------------------OCIDateTimeSubtract-----------------------
sword OCIDateTimeSubtract(dvoid *hndl, OCIError *err, OCIDateTime *indate1, 
		OCIDateTime *indate2, OCIInterval *inter);
NAME: OCIDateTimeSubtract - subtracts two datetimes to return an interval
PARAMETERS:
hndl (IN) - Session/Env handle. 
err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
indate1(IN) - pointer to subtrahend
indate2(IN) - pointer to minuend
inter  (OUT) - pointer to output interval
DESCRIPTION: 
	Takes two datetimes as input and stores their difference in an 
        interval. The type of the interval is the type of the 'inter'
        descriptor.
RETURNS:
        OCI_SUCCESS if the function completes successfully.
        OCI_INVALID_HANDLE if 'err' is NULL.
	OCI_ERROR if
	   datetimes are not comparable.

--------------------------- OCIDateTimeToText--------------------------
sword OCIDateTimeToText(dvoid *hndl, OCIError *err, CONST OCIDateTime *date, 
                        CONST OraText *fmt, ub1 fmt_length, ub1 fsprec, 
                        CONST OraText *lang_name, size_t lang_length, 
                        size_t *buf_size, OraText *buf );
NAME: OCIDateTimeToText - OCIDateTime convert date TO String 
PARAMETERS:
hndl (IN) - Session/Env handle. If Session Handle is passed, the 
		    conversion takes place in session NLS_LANGUAGE and
		    session NLS_CALENDAR, otherwise the default is used.
err (IN/OUT) - error handle. If there is an error, it is
                recorded in 'err' and this function returns OCI_ERROR.
                The error recorded in 'err' can be retrieved by calling
                OCIErrorGet().
date (IN) - Oracle datetime to be converted
fmt (IN) - conversion format, if null string pointer (OraText*)0, then
                the date is converted to a character string in the
                default format for that type.
fmt_length (IN) - length of the 'fmt' parameter
fsprec (IN) - specifies the fractional second precision in which the
               fractional seconds is returned.
lang_name (IN) - specifies the language in which the names and 
  	        abbreviations of months and days are returned;
  	        default language of session is used if 'lang_name' 
  		is null i.e. (OraText *)0
lang_length (IN) - length of the 'nls_params' parameter
buf_size (IN/OUT) - size of the buffer; size of the resulting string
                is returned via this parameter
buf (OUT) - buffer into which the converted string is placed
DESCRIPTION:
        Converts the given date to a string according to the specified format.
        Refer to "TO_DATE" conversion function described in