LCOV - differential code coverage report
Current view: top level - src/include/access - tupmacs.h (source / functions) Coverage Total Hit UNC UBC GNC CBC DCB
Current: 0e5ff9b9b45a657aea12440478dc002e9b01f138 vs 0123ce131fca454009439dfa3b2266d1d40737d7 Lines: 88.0 % 50 44 2 4 19 25 4
Current Date: 2026-03-14 14:10:32 -0400 Functions: 100.0 % 4 4 3 1
Baseline: lcov-20260315-024220-baseline Branches: 60.9 % 23 14 3 6 4 10
Baseline Date: 2026-03-14 15:27:56 +0100 Line coverage date bins:
Legend: Lines:     hit not hit
Branches: + taken - not taken # not executed
(30,360] days: 90.5 % 21 19 2 19
(360..) days: 86.2 % 29 25 4 25
Function coverage date bins:
(30,360] days: 100.0 % 1 1 1
(360..) days: 100.0 % 3 3 2 1
Branch coverage date bins:
(30,360] days: 57.1 % 7 4 3 4
(360..) days: 62.5 % 16 10 6 10

 Age         Owner                    Branch data    TLA  Line data    Source code
                                  1                 :                : /*-------------------------------------------------------------------------
                                  2                 :                :  *
                                  3                 :                :  * tupmacs.h
                                  4                 :                :  *    Tuple macros used by both index tuples and heap tuples.
                                  5                 :                :  *
                                  6                 :                :  *
                                  7                 :                :  * Portions Copyright (c) 1996-2026, PostgreSQL Global Development Group
                                  8                 :                :  * Portions Copyright (c) 1994, Regents of the University of California
                                  9                 :                :  *
                                 10                 :                :  * src/include/access/tupmacs.h
                                 11                 :                :  *
                                 12                 :                :  *-------------------------------------------------------------------------
                                 13                 :                :  */
                                 14                 :                : #ifndef TUPMACS_H
                                 15                 :                : #define TUPMACS_H
                                 16                 :                : 
                                 17                 :                : #include "catalog/pg_type_d.h"    /* for TYPALIGN macros */
                                 18                 :                : 
                                 19                 :                : 
                                 20                 :                : /*
                                 21                 :                :  * Check a tuple's null bitmap to determine whether the attribute is null.
                                 22                 :                :  * Note that a 0 in the null bitmap indicates a null, while 1 indicates
                                 23                 :                :  * non-null.
                                 24                 :                :  */
                                 25                 :                : static inline bool
 1336 peter@eisentraut.org       26                 :CBC   422971035 : att_isnull(int ATT, const bits8 *BITS)
                                 27                 :                : {
                                 28                 :      422971035 :     return !(BITS[ATT >> 3] & (1 << (ATT & 0x07)));
                                 29                 :                : }
                                 30                 :                : 
                                 31                 :                : #ifndef FRONTEND
                                 32                 :                : /*
                                 33                 :                :  * Given an attbyval and an attlen from either a Form_pg_attribute or
                                 34                 :                :  * CompactAttribute and a pointer into a tuple's data area, return the
                                 35                 :                :  * correct value or pointer.
                                 36                 :                :  *
                                 37                 :                :  * We return a Datum value in all cases.  If attbyval is false,  we return the
                                 38                 :                :  * same pointer into the tuple data area that we're passed.  Otherwise, we
                                 39                 :                :  * return the correct number of bytes fetched from the data area and extended
                                 40                 :                :  * to Datum form.
                                 41                 :                :  *
                                 42                 :                :  * Note that T must already be properly aligned for this to work correctly.
                                 43                 :                :  */
                                 44                 :                : #define fetchatt(A,T) fetch_att(T, (A)->attbyval, (A)->attlen)
                                 45                 :                : 
                                 46                 :                : /*
                                 47                 :                :  * Same, but work from byval/len parameters rather than Form_pg_attribute.
                                 48                 :                :  */
                                 49                 :                : static inline Datum
                                 50                 :      925221427 : fetch_att(const void *T, bool attbyval, int attlen)
                                 51                 :                : {
                                 52         [ +  + ]:      925221427 :     if (attbyval)
                                 53                 :                :     {
                                 54   [ +  +  +  +  :      775135054 :         switch (attlen)
                                                 - ]
                                 55                 :                :         {
                                 56                 :       85934289 :             case sizeof(char):
                                 57                 :       85934289 :                 return CharGetDatum(*((const char *) T));
                                 58                 :       41677571 :             case sizeof(int16):
                                 59                 :       41677571 :                 return Int16GetDatum(*((const int16 *) T));
                                 60                 :      618240203 :             case sizeof(int32):
                                 61                 :      618240203 :                 return Int32GetDatum(*((const int32 *) T));
  214 tgl@sss.pgh.pa.us          62                 :GNC    29282991 :             case sizeof(int64):
                                 63                 :       29282991 :                 return Int64GetDatum(*((const int64 *) T));
 1336 peter@eisentraut.org       64                 :UBC           0 :             default:
                                 65         [ #  # ]:              0 :                 elog(ERROR, "unsupported byval length: %d", attlen);
                                 66                 :                :                 return 0;
                                 67                 :                :         }
                                 68                 :                :     }
                                 69                 :                :     else
 1336 peter@eisentraut.org       70                 :CBC   150086373 :         return PointerGetDatum(T);
                                 71                 :                : }
                                 72                 :                : #endif                          /* FRONTEND */
                                 73                 :                : 
                                 74                 :                : /*
                                 75                 :                :  * typalign_to_alignby: map a TYPALIGN_xxx value to the numeric alignment
                                 76                 :                :  * value it represents.  (We store TYPALIGN_xxx codes not the real alignment
                                 77                 :                :  * values mainly so that initial catalog contents can be machine-independent.)
                                 78                 :                :  */
                                 79                 :                : static inline uint8
   41 tgl@sss.pgh.pa.us          80                 :GNC  1718629977 : typalign_to_alignby(char typalign)
                                 81                 :                : {
                                 82                 :                :     uint8       alignby;
                                 83                 :                : 
                                 84   [ +  +  +  +  :     1718629977 :     switch (typalign)
                                                 - ]
                                 85                 :                :     {
                                 86                 :      267794228 :         case TYPALIGN_CHAR:
                                 87                 :      267794228 :             alignby = sizeof(char);
                                 88                 :      267794228 :             break;
                                 89                 :       72667405 :         case TYPALIGN_SHORT:
                                 90                 :       72667405 :             alignby = ALIGNOF_SHORT;
                                 91                 :       72667405 :             break;
                                 92                 :     1269665779 :         case TYPALIGN_INT:
                                 93                 :     1269665779 :             alignby = ALIGNOF_INT;
                                 94                 :     1269665779 :             break;
                                 95                 :      108502565 :         case TYPALIGN_DOUBLE:
                                 96                 :      108502565 :             alignby = ALIGNOF_DOUBLE;
                                 97                 :      108502565 :             break;
   41 tgl@sss.pgh.pa.us          98                 :UNC           0 :         default:
                                 99                 :                : #ifndef FRONTEND
                                100         [ #  # ]:              0 :             elog(ERROR, "invalid typalign value: %c", typalign);
                                101                 :                : #else
                                102                 :                :             fprintf(stderr, "invalid typalign value: %c\n", typalign);
                                103                 :                :             exit(1);
                                104                 :                : #endif
                                105                 :                :             alignby = 0;
                                106                 :                :             break;
                                107                 :                :     }
   41 tgl@sss.pgh.pa.us         108                 :GNC  1718629977 :     return alignby;
                                109                 :                : }
                                110                 :                : 
                                111                 :                : /*
                                112                 :                :  * att_align_datum aligns the given offset as needed for a datum of alignment
                                113                 :                :  * requirement attalign and typlen attlen.  attdatum is the Datum variable
                                114                 :                :  * we intend to pack into a tuple (it's only accessed if we are dealing with
                                115                 :                :  * a varlena type).  Note that this assumes the Datum will be stored as-is;
                                116                 :                :  * callers that are intending to convert non-short varlena datums to short
                                117                 :                :  * format have to account for that themselves.
                                118                 :                :  */
                                119                 :                : #define att_align_datum(cur_offset, attalign, attlen, attdatum) \
                                120                 :                : ( \
                                121                 :                :     ((attlen) == -1 && VARATT_IS_SHORT(DatumGetPointer(attdatum))) ? \
                                122                 :                :     (uintptr_t) (cur_offset) : \
                                123                 :                :     att_align_nominal(cur_offset, attalign) \
                                124                 :                : )
                                125                 :                : 
                                126                 :                : /*
                                127                 :                :  * Similar to att_align_datum, but accepts a number of bytes, typically from
                                128                 :                :  * CompactAttribute.attalignby to align the Datum by.
                                129                 :                :  */
                                130                 :                : #define att_datum_alignby(cur_offset, attalignby, attlen, attdatum) \
                                131                 :                :     ( \
                                132                 :                :     ((attlen) == -1 && VARATT_IS_SHORT(DatumGetPointer(attdatum))) ? \
                                133                 :                :     (uintptr_t) (cur_offset) : \
                                134                 :                :     TYPEALIGN(attalignby, cur_offset))
                                135                 :                : 
                                136                 :                : /*
                                137                 :                :  * att_align_pointer performs the same calculation as att_align_datum,
                                138                 :                :  * but is used when walking a tuple.  attptr is the current actual data
                                139                 :                :  * pointer; when accessing a varlena field we have to "peek" to see if we
                                140                 :                :  * are looking at a pad byte or the first byte of a 1-byte-header datum.
                                141                 :                :  * (A zero byte must be either a pad byte, or the first byte of a correctly
                                142                 :                :  * aligned 4-byte length word; in either case we can align safely.  A non-zero
                                143                 :                :  * byte must be either a 1-byte length word, or the first byte of a correctly
                                144                 :                :  * aligned 4-byte length word; in either case we need not align.)
                                145                 :                :  *
                                146                 :                :  * Note: some callers pass a "char *" pointer for cur_offset.  This is
                                147                 :                :  * a bit of a hack but should work all right as long as uintptr_t is the
                                148                 :                :  * correct width.
                                149                 :                :  */
                                150                 :                : #define att_align_pointer(cur_offset, attalign, attlen, attptr) \
                                151                 :                : ( \
                                152                 :                :     ((attlen) == -1 && VARATT_NOT_PAD_BYTE(attptr)) ? \
                                153                 :                :     (uintptr_t) (cur_offset) : \
                                154                 :                :     att_align_nominal(cur_offset, attalign) \
                                155                 :                : )
                                156                 :                : 
                                157                 :                : /*
                                158                 :                :  * Similar to att_align_pointer, but accepts a number of bytes, typically from
                                159                 :                :  * CompactAttribute.attalignby to align the pointer by.
                                160                 :                :  */
                                161                 :                : #define att_pointer_alignby(cur_offset, attalignby, attlen, attptr) \
                                162                 :                :     ( \
                                163                 :                :     ((attlen) == -1 && VARATT_NOT_PAD_BYTE(attptr)) ? \
                                164                 :                :     (uintptr_t) (cur_offset) : \
                                165                 :                :     TYPEALIGN(attalignby, cur_offset))
                                166                 :                : 
                                167                 :                : /*
                                168                 :                :  * att_align_nominal aligns the given offset as needed for a datum of alignment
                                169                 :                :  * requirement attalign, ignoring any consideration of packed varlena datums.
                                170                 :                :  * There are three main use cases for using this macro directly:
                                171                 :                :  *  * we know that the att in question is not varlena (attlen != -1);
                                172                 :                :  *    in this case it is cheaper than the above macros and just as good.
                                173                 :                :  *  * we need to estimate alignment padding cost abstractly, ie without
                                174                 :                :  *    reference to a real tuple.  We must assume the worst case that
                                175                 :                :  *    all varlenas are aligned.
                                176                 :                :  *  * within arrays and multiranges, we unconditionally align varlenas (XXX this
                                177                 :                :  *    should be revisited, probably).
                                178                 :                :  *
                                179                 :                :  * In performance-critical loops, avoid using this macro; instead use
                                180                 :                :  * att_nominal_alignby with a pre-computed alignby value.
                                181                 :                :  */
                                182                 :                : #define att_align_nominal(cur_offset, attalign) \
                                183                 :                :     att_nominal_alignby(cur_offset, typalign_to_alignby(attalign))
                                184                 :                : 
                                185                 :                : /*
                                186                 :                :  * Similar to att_align_nominal, but accepts a number of bytes, typically from
                                187                 :                :  * CompactAttribute.attalignby to align the offset by.
                                188                 :                :  */
                                189                 :                : #define att_nominal_alignby(cur_offset, attalignby) \
                                190                 :                :     TYPEALIGN(attalignby, cur_offset)
                                191                 :                : 
                                192                 :                : /*
                                193                 :                :  * att_addlength_datum increments the given offset by the space needed for
                                194                 :                :  * the given Datum variable.  attdatum is only accessed if we are dealing
                                195                 :                :  * with a variable-length attribute.
                                196                 :                :  */
                                197                 :                : #define att_addlength_datum(cur_offset, attlen, attdatum) \
                                198                 :                :     att_addlength_pointer(cur_offset, attlen, DatumGetPointer(attdatum))
                                199                 :                : 
                                200                 :                : /*
                                201                 :                :  * att_addlength_pointer performs the same calculation as att_addlength_datum,
                                202                 :                :  * but is used when walking a tuple --- attptr is the pointer to the field
                                203                 :                :  * within the tuple.
                                204                 :                :  *
                                205                 :                :  * Note: some callers pass a "char *" pointer for cur_offset.  This is
                                206                 :                :  * actually perfectly OK, but probably should be cleaned up along with
                                207                 :                :  * the same practice for att_align_pointer.
                                208                 :                :  */
                                209                 :                : #define att_addlength_pointer(cur_offset, attlen, attptr) \
                                210                 :                : ( \
                                211                 :                :     ((attlen) > 0) ? \
                                212                 :                :     ( \
                                213                 :                :         (cur_offset) + (attlen) \
                                214                 :                :     ) \
                                215                 :                :     : (((attlen) == -1) ? \
                                216                 :                :     ( \
                                217                 :                :         (cur_offset) + VARSIZE_ANY(attptr) \
                                218                 :                :     ) \
                                219                 :                :     : \
                                220                 :                :     ( \
                                221                 :                :         AssertMacro((attlen) == -2), \
                                222                 :                :         (cur_offset) + (strlen((const char *) (attptr)) + 1) \
                                223                 :                :     )) \
                                224                 :                : )
                                225                 :                : 
                                226                 :                : #ifndef FRONTEND
                                227                 :                : /*
                                228                 :                :  * store_att_byval is a partial inverse of fetch_att: store a given Datum
                                229                 :                :  * value into a tuple data area at the specified address.  However, it only
                                230                 :                :  * handles the byval case, because in typical usage the caller needs to
                                231                 :                :  * distinguish by-val and by-ref cases anyway, and so a do-it-all function
                                232                 :                :  * wouldn't be convenient.
                                233                 :                :  */
                                234                 :                : static inline void
 1336 peter@eisentraut.org      235                 :CBC   105877669 : store_att_byval(void *T, Datum newdatum, int attlen)
                                236                 :                : {
                                237   [ +  +  +  +  :      105877669 :     switch (attlen)
                                                 - ]
                                238                 :                :     {
                                239                 :       14014229 :         case sizeof(char):
                                240                 :       14014229 :             *(char *) T = DatumGetChar(newdatum);
                                241                 :       14014229 :             break;
                                242                 :        4847508 :         case sizeof(int16):
                                243                 :        4847508 :             *(int16 *) T = DatumGetInt16(newdatum);
                                244                 :        4847508 :             break;
                                245                 :       76553368 :         case sizeof(int32):
                                246                 :       76553368 :             *(int32 *) T = DatumGetInt32(newdatum);
                                247                 :       76553368 :             break;
  214 tgl@sss.pgh.pa.us         248                 :GNC    10462564 :         case sizeof(int64):
                                249                 :       10462564 :             *(int64 *) T = DatumGetInt64(newdatum);
 1336 peter@eisentraut.org      250                 :CBC    10462564 :             break;
 1336 peter@eisentraut.org      251                 :UBC           0 :         default:
                                252         [ #  # ]:              0 :             elog(ERROR, "unsupported byval length: %d", attlen);
                                253                 :                :     }
 1336 peter@eisentraut.org      254                 :CBC   105877669 : }
                                255                 :                : #endif                          /* FRONTEND */
                                256                 :                : 
                                257                 :                : #endif                          /* TUPMACS_H */
        

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