Procedures — Initial guide to creating them in RPGLE
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In this example we will provide an example of how to get date values in a multitude of formats.
You may pass it a date — or — don’t pass and the procedure will use current date.
Note: The definition of the date types can be set to a specific format.
Example:
1 | d WorkIsodate s d datfmt(*ISO) |
We will start with the procedure code, this will include both the source for the procedure and a copy book of the PR.
Placing the datastructures/arrays in the copy book, make them available to the main program when calling the procedure.
We will not be discussing service programs here.
create your source member to use for storage of code
1 | crtsrcpf jjflib/qprcsrc rcdlen(112) |
Procedure first (getdate):
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 | H NOMAIN EXPROPTS(*RESDECPOS) * PROGRAM - getdate * PURPOSE - Subprocedure to format date into multiple formats * WRITTEN - September 05 2007 * AUTHOR - jamie flanary * Parameters * Indate Char 8 input * Insubdays dec 6 input * Inweekends Char 1 input (Y=include weekends) * Inholidays Char 1 input (Y=include holidays) * * if inweekends and/or inholidays not passed then default to "N" * Indicator Usage * None * The getdatE_CP copy member should be used by programs that call this subprocedure * to obtain the procedure prototype fields. /copy qprcsrc,getdate_cp d a s 5 0 d y s 5 0 d m s 5 0 d char10 s 10 d Dateinerror s 1 inz('N') d DayCount s 6 0 inz d DayOf s 1 0 inz d DayOfweek s 1 0 inz d decimal6 s 6 0 inz d f1 s 7 0 d f2 s 7 0 d f3 s 7 0 d f4 s 7 0 d f5 s 7 0 d formatBack s 65535A varying d holidaycount s 6 0 d indate s 10a d Lilian s 10i 0 d NewDate s 52a d outdate s 8 d work6 s 6 0 d work7 s 7 0 d work8 s 8 0 d workIso s D d workIso0 s 8 0 d workdate s 8 d workdays s 6 0 d workholidays s 1 d workweekends s 1 * * Begin Procedure P getdate B export * Procedure Interface d getdate pi 512 d indate 8 const options(*nopass) d indays 6 0 const options(*nopass) d inweekends 1 const options(*nopass) d inholidays 1 const options(*nopass) /free Exec SQL set option datfmt= *iso; //all parms are optional so check to see what was passed if %parms >= 1; workdate = indate; else; clear workdate; endif; if %parms >= 2; workdays = indays; else; clear workdays; endif; if %parms >= 3; workweekends = inweekends; else; workweekends = 'N'; endif; if %parms >= 4; workholidays = inholidays; else; workholidays = 'N'; endif; exsr $checkdate; // if valid date passed in (or *blanks) then process if dateinerror = 'N'; if workdays <> *zeros; exsr $checkdatemath; endif; exsr $formatdate; endif; dateds.error = 'N'; if dateinerror = 'Y'; dateds.error = 'Y'; endif; return dateDS; //-------------------------------------------------------- // $checkdate - figure out what format the date is in // if format found then validate. //-------------------------------------------------------- begsr $checkdate; // make sure that passed in parameter contains all digits (or blanks) if %check(' 0123456789 ': workdate) = 0; // get the length of workdate this will help determine // what format the date is in if blank then workdate // will be Today. ==> get date into *ISO format for the // rest of the process. reset dateinerror; workiso = *loval; select; when workdate = *blanks; workiso = %date(); when %len(%trim(workdate)) = 6; // *MDY or *YMD or *DMY work6 = %dec(workdate:6:0); test(de) *mdy work6; if not%error; WorkIso = %date(work6:*mdy); else; test(de) *ymd work6; if not%error; WorkIso = %date(work6:*ymd); else; test(de) *dmy work6; if not%error; WorkIso = %date(work6:*dmy); else; // date is 6 in length but not valid dateinerror = 'Y'; endif; endif; endif; when %len(%trim(workdate)) = 7; // *cymd work7 = %dec(workdate:7:0); test(de) *cymd work7; if not%error; WorkIso = %date(work7:*cymd); else; dateinerror = 'Y'; endif; when %len(%trim(workdate)) = 8; // *iso work8 = %dec(workdate:8:0); test(de) *iso work8; if not%error; WorkIso = %date(work8:*iso); else; dateinerror = 'Y'; endif; other; // date not in known format...... dateinerror = 'Y'; endsl; // date contains characters ...... else; dateinerror = 'Y'; endif; endsr; //-------------------------------------------------------- // $checkdatemath - check to see if user wants to add/sub // days from passed in date also check // to see if user wants to include // weekends in date math. //-------------------------------------------------------- begsr $checkdatemath; clear daycount; dou daycount = %abs(workdays); select; when workdays < *zeros; workiso -= %days(1); when workdays > *zeros; workiso += %days(1); endsl; exec sql values dayofweek(:workiso) into :dayofweek; clear holidaycount; workiso0 = %dec(workiso:*iso); exec sql select count(*) into :holidaycount from HOLIDAYS where HOLDATE = : workiso; if workweekends = 'Y' or workweekends = 'N' and dayofweek <> 1 and dayofweek <> 7; if workholidays = 'Y' or workholidays = 'N' and holidaycount = *zeros; daycount +=1; endif; endif; enddo; endsr; //-------------------------------------------------------- // $Formatdate - format the date into multiple formats //-------------------------------------------------------- begsr $Formatdate; // okay start the manipulation dateds.iso = workiso; // date 19390801 will validate as a "proper" // date but when you try to move to *MDY well // very bad things will happen. if %subdt(workiso:*years) < 1940; char10 = %char(workiso:*iso); decimal6 = %dec(%subst(char10:6:2) + %subst(char10:9:2) + %subst(char10:3:2):6:0); dateds.mdy = %date(decimal6:*mdy); else; dateds.mdy = workiso; endif; dateds.usa = workiso; dateds.iso0 = %dec(workiso:*iso); dateds.mdy0 = %dec(dateds.mdy:*mdy); dateds.usa0 = %dec(workiso:*usa); dateds.cymd0 = %dec(workiso:*cymd); // julian date - same date rules apply here // The range for a 2-digit year is 1940-2039 // The range for a 3-digit year is 1900-2899 // The range for a 4-digit year is 0001-9999 if %subdt(workiso:*years) < 1940; // 14 - months / 12 a = (14 - %subdt(workiso:*months)) / 12; if a < 1; a = *zeros; endif; // year + 4800 - a y = (%subdt(workiso:*years) + 4800) - a; // month + 12(a) - 3 m = (%subdt(workiso:*months) + (12*a) - 3); f1 = (153*m + 2) / 5; f2 = 365*y; f3 = y/4; f4 = y/100; f5 = y/400; dateds.jul0 = %subdt(workiso:*days) + f1 + f2 + f3 - f4 + f5 - 32045; else; exec sql values julian_day(:dateds.iso) into :dateds.jul0 ; endif; // get day of week exec sql values dayofweek(:dateds.iso) into :DayOf; dateds.dayname = Arr_Dayname(DayOf); // month name dateds.monthname = Arr_monname(%subdt(dateds.iso:*months)); // last day of current month exec sql set :dateds.lstdaycur = char(last_day(:dateds.iso), ISO); // last day of current month decimal 8 dateds.lstdaycuriso = %dec(%Date(dateds.lstdaycur): *Iso); // date 19390801 will validate as a "proper" // date but when you try to move to *MDY well // very bad things will happen. if %subdt(%date(dateds.lstdaycur:*iso):*years) < 1940; char10 = %char(%date(dateds.lstdaycur)); decimal6 = %dec(%subst(char10:6:2) + %subst(char10:9:2) + %subst(char10:3:2):6:0); dateds.lstdaycurmdy = %dec(%date(decimal6:*mdy):*mdy); else; dateds.lstdaycurmdy = %dec(%date(dateds.lstdaycur): *mdy); endif; dateds.lstdaycurcymd = %dec(%Date(dateds.lstdaycur): *cymd); // first day of current month workiso = dateds.iso - %days(%subdt(dateds.iso:*d)-1); dateds.fstdaycur = %char(workiso); // first day of current month decimal 8 dateds.fstdaycuriso = %dec(%Date(dateds.fstdaycur): *Iso); if %subdt(%date(dateds.fstdaycur:*iso):*years) < 1940; char10 = %char(%date(dateds.fstdaycur)); decimal6 = %dec(%subst(char10:6:2) + %subst(char10:9:2) + %subst(char10:3:2):6:0); dateds.fstdaycurmdy = %dec(%date(decimal6:*mdy):*mdy); else; dateds.fstdaycurmdy = %dec(%Date(dateds.fstdaycur): *mdy); endif; dateds.fstdaycurcymd = %dec(%Date(dateds.fstdaycur): *cymd); // last day of previous month dateds.workiso = dateds.iso - %months(1); exec sql set :dateds.lstdaylst = char(last_day(:dateds.workiso), ISO); dateds.lstdaylstiso = %dec(%Date(dateds.lstdaylst): *Iso); if %subdt(%date(dateds.lstdaylst:*iso):*years) < 1940; char10 = %char(%date(dateds.lstdaylst)); decimal6 = %dec(%subst(char10:6:2) + %subst(char10:9:2) + %subst(char10:3:2):6:0); dateds.lstdaylstmdy = %dec(%date(decimal6:*mdy):*mdy); else; dateds.lstdaylstmdy = %dec(%date(dateds.lstdaylst): *mdy); endif; dateds.lstdaylstcymd = %dec(%Date(dateds.lstdaylst): *cymd); // first day of previous month dateds.workiso = dateds.iso - %months(1); workiso = dateds.workiso - %days(%subdt(dateds.workiso:*d)-1); dateds.fstdaylst = %char(workiso); dateds.fstdaylstiso = %dec(%Date(dateds.fstdaylst): *Iso); if %subdt(%date(dateds.fstdaylst:*iso):*years) < 1940; char10 = %char(%date(dateds.fstdaylst)); decimal6 = %dec(%subst(char10:6:2) + %subst(char10:9:2) + %subst(char10:3:2):6:0); dateds.fstdaylstmdy = %dec(%date(decimal6:*mdy):*mdy); else; dateds.fstdaylstmdy = %dec(%Date(dateds.fstdaylst): *mdy); endif; dateds.fstdaylstcymd = %dec(%Date(dateds.fstdaylst): *cymd); // build a date string CEEDAYS(%char(dateds.iso): 'YYYY-MM-DD': lilian: *omit); CEEDATE(Lilian: 'DD Mmm YYYY': NewDate: *omit); dateds.string1 = newdate; // this ===> 24 Jun 2007 formatBack = 'Wwwwwwwwwz, DD Mmm YYYY'; CEEDATE(Lilian: Formatback : NewDate: *omit); dateds.string2 = newdate; // this ===> Wednesday, 27 Jun 2007 formatBack = 'Wwwwwwwwwz, DD Mmmmmmmmmz YYYY'; CEEDATE(Lilian: Formatback : NewDate: *omit); // this ===> Wednesday, 27 June 2007 dateds.string3 = newdate; // get timestamp dateds.time = %time(); exec sql values current_Timestamp into :Dateds.timestamp; endsr; //-------------------------------------------------------- /end-free p getdate E |
Copy Book Next (getdate_cp):
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 | * What is returned * EVAL date * DATEDS.ERROR = 'N' 1 * DATEDS.ISO = '2007-08-01' 2-11 * DATEDS.MDY = '08/01/07' 12-19 * DATEDS.USA = '08/01/2007' 20-29 * DATEDS.ISO0 = 20070801. 30-37 * DATEDS.MDY0 = 080107. 38-43 * DATEDS.USA0 = 08012007. 44-51 * DATEDS.JUL0 = 2454314. 52-58 * DATEDS.DAYNAME = 'Wednesday' 59-67 * DATEDS.MONTHNAME = 'August ' 68-76 * DATEDS.LSTDAYCUR = '2007-08-31' 77-86 * DATEDS.LSTDAYCURISO = 20070831. 87-94 * DATEDS.LSTDAYCURMDY = 083107. 95-100 * DATEDS.LSTDAYCURCYMD = 1070831. 101-107 * DATEDS.FSTDAYCUR = '2007-08-01' 108-117 * DATEDS.FSTDAYCURISO = 20070801. 118-125 * DATEDS.FSTDAYCURMDY = 080107. 126-131 * DATE.DSFSTDAYCURCYMD = 1070801. 132-138 * * DATEDS.LSTDAYLST = '2007-07-31' 139-148 * DATEDS.LSTDAYLSTISO = 20070731. 149-156 * DATEDS.LSTDAYLSTMDY = 073107. 157-162 * DATEDS.LSTDAYLSTCYMD = 1070731. 163-169 * DATEDS.FSTDAYLST = '2007-07-01' 170-179 * DATEDS.FSTDAYLSTISO = 20070701. 180-187 * DATEDS.FSTDAYLSTMDY = 070107. 188-193 * DATEDS.FSTDAYLSTCYMD = 1070701. 194-200 * * DATEDS.STRING1 = '01 Aug 2007 ' 201-230 * DATEDS.STRING2 = 'Wednesday, 01 Aug 2007 ' 231-260 * DATEDS.STRING3 = 'Wednesday, 01 August 2007 ' 261-290 * DATEDS.TIME = '16.05.03' 291-298 * DATEDS.TIMESTAMP = '2007-08-01-16.05.03.000000' 299-324 * DATEDS.WORKISO = '2007-07-01' 325-334 * DATEDS.CYMD0 = 1070701 335-341 * getdat Format date into multiple formats d getdate pr 512 d Indate 8 const options(*nopass) d Indays 6 0 const options(*nopass) d Inweekends 1 const options(*nopass) d Inholidays 1 const options(*nopass) // the multiple formats of the date d dateDS ds qualified inz d error 1 inz('N') d iso d datfmt(*iso) d mdy d datfmt(*mdy) d usa d datfmt(*usa) d iso0 8 0 d mdy0 6 0 d usa0 8 0 d jul0 7 0 d dayname 9 d monthname 9 d lstdaycur 10 d lstdaycuriso 8 0 d lstdaycurmdy 6 0 d lstdaycurcymd 7 0 d fstdaycur 10 d fstdaycuriso 8 0 d fstdaycurmdy 6 0 d fstdaycurcymd 7 0 d lstdaylst 10 d lstdaylstiso 8 0 d lstdaylstmdy 6 0 d lstdaylstcymd 7 0 d fstdaylst 10 d fstdaylstiso 8 0 d fstdaylstmdy 6 0 d fstdaylstcymd 7 0 d string1 30 d string2 30 d string3 30 d time t d timestamp z d workiso d datfmt(*iso) d cymd0 7 0 d ds_Dayname ds d 9 Inz('Sunday') d 9 Inz('Monday') d 9 Inz('Tuesday') d 9 Inz('Wednesday') d 9 Inz('Thursday') d 9 Inz('Friday') d 9 Inz('Saturday') d arr_Dayname 9 Dim(8) OverLay(ds_Dayname) d ds_monname ds d 9 Inz('January') d 9 Inz('February') d 9 Inz('March') d 9 Inz('April') d 9 Inz('May') d 9 Inz('June') d 9 Inz('July') d 9 Inz('August') d 9 Inz('September') d 9 Inz('October') d 9 Inz('November') d 9 Inz('December') d arr_monname 9 Dim(12) OverLay(ds_monname) d CEEDAYS pr opdesc d InputDate 65535A const options(*varsize) d picture 65535A const options(*varsize) d Lilian 10i 0 d Feedback 12a options(*omit) d CEEDATE pr opdesc d Lilian 10i 0 d picture 65535A const options(*varsize) d OutputDate 65535A const options(*varsize) d Feedback 12a options(*omit) |
Once I have the code working and I compile it using: Create SQL ILE RPG Object (CRTSQLRPGI)
1 2 | CRTSQLRPGI OBJ(JJFLIB/GETDATE) SRCFILE(JJFLIB/QPRCSRC) OBJTYPE(*MODULE) DBGVIEW(*SOURCE) DBGENCKEY(*NONE) |
Now we meed to add the procedure to a binding directory.
1 |
Now we are ready to test with a program (getdatetst):
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 |
returns for current date:
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 | // returns // EVAL dateds // DATEDS.ERROR = 'N' // DATEDS.ISO = '2018-12-17' // DATEDS.MDY = '12/17/18' // DATEDS.USA = '12/17/2018' // DATEDS.ISO0 = 20181217. // DATEDS.MDY0 = 121718. // DATEDS.USA0 = 12172018. // DATEDS.JUL0 = 2458470. // DATEDS.DAYNAME = 'Monday ' // DATEDS.MONTHNAME = 'December ' // DATEDS.LSTDAYCUR = '2018-12-31' // DATEDS.LSTDAYCURISO = 20181231. // DATEDS.LSTDAYCURMDY = 123118. // DATEDS.LSTDAYCURCYMD = 1181231. // DATEDS.FSTDAYCUR = '2018-12-01' // DATEDS.FSTDAYCURISO = 20181201. // DATEDS.FSTDAYCURMDY = 120118. // DATEDS.FSTDAYCURCYMD = 1181201. // DATEDS.LSTDAYLST = '2018-11-30' // DATEDS.LSTDAYLSTISO = 20181130. // DATEDS.LSTDAYLSTMDY = 113018. // DATEDS.LSTDAYLSTCYMD = 1181130. // DATEDS.FSTDAYLST = '2018-11-01' // DATEDS.FSTDAYLSTISO = 20181101. // DATEDS.FSTDAYLSTMDY = 110118. // DATEDS.FSTDAYLSTCYMD = 1181101. // DATEDS.STRING1 = '17 Dec 2018 ' // DATEDS.STRING2 = 'Monday, 17 Dec 2018 ' // DATEDS.STRING3 = 'Monday, 17 December 2018 ' // DATEDS.TIME = '08.45.25' // DATEDS.TIMESTAMP = '2018-12-17-08.45.25.252626' // DATEDS.WORKISO = '2018-11-17' // DATEDS.CYMD0 = 1181217. // |
Returns for January 1st 2019
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 | // EVAL dateds // DATEDS.ERROR = 'N' // DATEDS.ISO = '2019-01-01' // DATEDS.MDY = '01/01/19' // DATEDS.USA = '01/01/2019' // DATEDS.ISO0 = 20190101. // DATEDS.MDY0 = 010119. // DATEDS.USA0 = 01012019. // DATEDS.JUL0 = 2458485. // DATEDS.DAYNAME = 'Tuesday ' // DATEDS.MONTHNAME = 'January ' // DATEDS.LSTDAYCUR = '2019-01-31' // DATEDS.LSTDAYCURISO = 20190131. // DATEDS.LSTDAYCURMDY = 013119. // DATEDS.LSTDAYCURCYMD = 1190131. // DATEDS.FSTDAYCUR = '2019-01-01' // DATEDS.FSTDAYCURISO = 20190101. // DATEDS.FSTDAYCURMDY = 010119. // DATEDS.FSTDAYCURCYMD = 1190101. // DATEDS.LSTDAYLST = '2018-12-31' // DATEDS.LSTDAYLSTISO = 20181231. // DATEDS.LSTDAYLSTMDY = 123118. // DATEDS.LSTDAYLSTCYMD = 1181231. // DATEDS.FSTDAYLST = '2018-12-01' // DATEDS.FSTDAYLSTISO = 20181201. // DATEDS.FSTDAYLSTMDY = 120118. // DATEDS.FSTDAYLSTCYMD = 1181201. // DATEDS.STRING1 = '01 Jan 2019 ' // DATEDS.STRING2 = 'Tuesday, 01 Jan 2019 ' // DATEDS.STRING3 = 'Tuesday, 01 January 2019 ' // DATEDS.TIME = '08.46.23' // DATEDS.TIMESTAMP = '2018-12-17-08.46.23.423491' // DATEDS.WORKISO = '2018-12-01' // DATEDS.CYMD0 = 1190101. // |
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Very useful article. The only thing i’m missing is a week number with a weekday
Dec 17 2018 would give 2018/51/1 (EEYY/WW/D)
Jan 1 2019 would give 2019/01/2
Assuming the week starts with a monday.
Gr. Bert