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Changes In Branch month-truncate Excluding Merge-Ins

This is equivalent to a diff from 803481f250 to 296b46c529

2024-03-06
20:59
Fix two -Werror=lto-type-mismatch warnings reported in forum post ef62b57bd5. (check-in: d4e423f3a4 user: mistachkin tags: branch-3.45)
2024-03-02
21:02
New date/time modifiers "mnth" and "yr" work like "month" and "year" but resolve day-of-month overflow by truncating rather than rolling over into the next month. Forum thread 232d1abb5d (check-in: 5d392c16bb user: drh tags: trunk)
20:50
Change the magic time-interval names that do truncate-to-same-month to be "mnth" and "yr" - "month" and "year" without the vowels. (Closed-Leaf check-in: 296b46c529 user: drh tags: month-truncate)
20:39
Attempt to use less memory when handling a large VALUES clause attached to an INSERT statement. This branch is buggy. (check-in: 6d4f1ae2fc user: dan tags: exp-values-clause)
13:38
Proof-of-concept for new time-interval operator "pg-month" and "pg-year" that use the truncate-to-month algorithm for month overflow instead of the wrap-to-next-month algorithm that is used by SQLite by default. (check-in: b606c09657 user: drh tags: month-truncate)
2024-02-29
13:44
Add the ability to DROP one or more objects of the same class in a single statement by listing the objects as multiple arguments to the DROP command. (check-in: 2266086cf0 user: drh tags: multi-drop)
10:55
Fix two -Werror=lto-type-mismatch warnings reported in forum post ef62b57bd5. (check-in: 803481f250 user: stephan tags: trunk)
03:45
Fix two -Werror=lto-type-mismatch warnings reported in forum post ef62b57bd5. (Closed-Leaf check-in: 29f94610dc user: stephan tags: lto-type-mismatch)
2024-02-28
15:32
Add in a VdbeCoverage() macro needed by STAT4 that should have been part of check-in [63ef234e88857a65]. (check-in: d51c699ae4 user: drh tags: trunk)

Changes to src/date.c.
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*/
static const struct {
  u8 nName;           /* Length of the name */
  char zName[7];      /* Name of the transformation */
  float rLimit;       /* Maximum NNN value for this transform */
  float rXform;       /* Constant used for this transform */
} aXformType[] = {
  { 6, "second", 4.6427e+14,       1.0  },
  { 6, "minute", 7.7379e+12,      60.0  },
  { 4, "hour",   1.2897e+11,    3600.0  },
  { 3, "day",    5373485.0,    86400.0  },
  { 5, "month",  176546.0,   2592000.0  },
  { 4, "year",   14713.0,   31536000.0  },
  /* 0 */ { 6, "second",   4.6427e+14,         1.0  },
  /* 1 */ { 6, "minute",   7.7379e+12,        60.0  },
  /* 2 */ { 4, "hour",     1.2897e+11,      3600.0  },
  /* 3 */ { 3, "day",      5373485.0,      86400.0  },
  /* 4 */ { 5, "month",    176546.0,  30.0*86400.0  },
  /* 5 */ { 4, "mnth",     176546.0,  30.0*86400.0  },
  /* 6 */ { 4, "year",     14713.0,  365.0*86400.0  },
  /* 7 */ { 2, "yr",       14713.0,  365.0*86400.0  },
};

/*
** If the DateTime p is raw number, try to figure out if it is
** a julian day number of a unix timestamp.  Set the p value
** appropriately.
*/
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      }

      /* If control reaches this point, it means the transformation is
      ** one of the forms like "+NNN days".  */
      z += n;
      while( sqlite3Isspace(*z) ) z++;
      n = sqlite3Strlen30(z);
      if( n>10 || n<3 ) break;
      if( n>10 || n<2 ) break;
      if( sqlite3UpperToLower[(u8)z[n-1]]=='s' ) n--;
      computeJD(p);
      assert( rc==1 );
      rRounder = r<0 ? -0.5 : +0.5;
      for(i=0; i<ArraySize(aXformType); i++){
        if( aXformType[i].nName==n
         && sqlite3_strnicmp(aXformType[i].zName, z, n)==0
         && r>-aXformType[i].rLimit && r<aXformType[i].rLimit
        ){
          int targetMonth = 0;
          switch( i ){
            case 4:
            case 4: { /* Special processing to add months */
              assert( strcmp(aXformType[i].zName,"month")==0 );
            case 5: { /* Special processing to add months */
              assert( strcmp(aXformType[4].zName,"month")==0 );
              assert( strcmp(aXformType[5].zName,"mnth")==0 );
              computeYMD_HMS(p);
              p->M += (int)r;
              x = p->M>0 ? (p->M-1)/12 : (p->M-12)/12;
              p->Y += x;
              p->M -= x*12;
              assert( p->M>=1 && p->M<=12 );
              if( i==5 ) targetMonth = p->M;
              p->validJD = 0;
              r -= (int)r;
              break;
            }
            case 6:
            case 5: { /* Special processing to add years */
            case 7: { /* Special processing to add years */
              int y = (int)r;
              assert( strcmp(aXformType[6].zName,"year")==0 );
              assert( strcmp(aXformType[i].zName,"year")==0 );
              assert( strcmp(aXformType[7].zName,"yr")==0 );
              computeYMD_HMS(p);
              assert( p->M>=1 && p->M<=12 );
              if( i==7 ) targetMonth = p->M;
              p->Y += y;
              p->validJD = 0;
              r -= (int)r;
              break;
            }
          }
          computeJD(p);
          if( targetMonth>0 ){
            p->validYMD = 0;
            computeYMD(p);
            if( p->M==targetMonth+1 ) p->iJD -= p->D*86400000;
            p->validYMD = 0;
          }
          p->iJD += (sqlite3_int64)(r*1000.0*aXformType[i].rXform + rRounder);
          rc = 0;
          break;
        }
      }
      clearYMD_HMS_TZ(p);
      break;
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Changes to test/date.test.
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datetest 2.47 {datetime('2003-10-22 12:24','8.6 seconds')} {2003-10-22 12:24:08}
datetest 2.48 {datetime('2003-10-22 12:24','9.4 second')} {2003-10-22 12:24:09}
datetest 2.49 {datetime('2003-10-22 12:24','0000 second')} {2003-10-22 12:24:00}
datetest 2.50 {datetime('2003-10-22 12:24','0001 second')} {2003-10-22 12:24:01}
datetest 2.51 {datetime('2003-10-22 12:24','nonsense')} NULL

datetest 2.60 {datetime('2023-02-31')} {2023-03-03 00:00:00}

datetest 2.70 {date('2024-01-31','+1 month')} {2024-03-02}
datetest 2.71 {date('2024-01-31','+1 mnth')} {2024-02-29}
datetest 2.72 {date('2023-01-31','+1 month')} {2023-03-03}
datetest 2.73 {date('2023-01-31','+1 mnth')} {2023-02-28}
datetest 2.74 {date('2024-02-29','+1 year')} {2025-03-01}
datetest 2.75 {date('2024-02-29','+1 yr')} {2025-02-28}
datetest 2.76 {date('2024-02-29','-110 years')} {1914-03-01}
datetest 2.77 {date('2024-02-29','-110 yrs')} {1914-02-28}

datetest 3.1 {strftime('%d','2003-10-31 12:34:56.432')} 31
datetest 3.2.1 {strftime('pre%fpost','2003-10-31 12:34:56.432')} pre56.432post
datetest 3.2.2 {strftime('%f','2003-10-31 12:34:59.9999999')} 59.999
datetest 3.3 {strftime('%H','2003-10-31 12:34:56.432')} 12
datetest 3.4 {strftime('%j','2003-10-31 12:34:56.432')} 304
datetest 3.5 {strftime('%J','2003-10-31 12:34:56.432')} 2452944.024264259
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