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arrayaccess.h File Reference
#include "access/tupmacs.h"
#include "utils/array.h"
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Data Structures

struct  array_iter
 

Typedefs

typedef struct array_iter array_iter
 

Functions

static void array_iter_setup (array_iter *it, AnyArrayType *a)
 
static Datum array_iter_next (array_iter *it, bool *isnull, int i, int elmlen, bool elmbyval, char elmalign)
 

Typedef Documentation

◆ array_iter

typedef struct array_iter array_iter

Function Documentation

◆ array_iter_next()

static Datum array_iter_next ( array_iter it,
bool *  isnull,
int  i,
int  elmlen,
bool  elmbyval,
char  elmalign 
)
inlinestatic

Definition at line 81 of file arrayaccess.h.

83{
84 Datum ret;
85
86 if (it->datumptr)
87 {
88 ret = it->datumptr[i];
89 *isnull = it->isnullptr ? it->isnullptr[i] : false;
90 }
91 else
92 {
93 if (it->bitmapptr && (*(it->bitmapptr) & it->bitmask) == 0)
94 {
95 *isnull = true;
96 ret = (Datum) 0;
97 }
98 else
99 {
100 *isnull = false;
101 ret = fetch_att(it->dataptr, elmbyval, elmlen);
102 it->dataptr = att_addlength_pointer(it->dataptr, elmlen,
103 it->dataptr);
104 it->dataptr = (char *) att_align_nominal(it->dataptr, elmalign);
105 }
106 it->bitmask <<= 1;
107 if (it->bitmask == 0x100)
108 {
109 if (it->bitmapptr)
110 it->bitmapptr++;
111 it->bitmask = 1;
112 }
113 }
114
115 return ret;
116}
int i
Definition: isn.c:72
uintptr_t Datum
Definition: postgres.h:69
Datum * datumptr
Definition: arrayaccess.h:38
bits8 * bitmapptr
Definition: arrayaccess.h:43
bool * isnullptr
Definition: arrayaccess.h:39
char * dataptr
Definition: arrayaccess.h:42
#define att_align_nominal(cur_offset, attalign)
Definition: tupmacs.h:150
#define att_addlength_pointer(cur_offset, attlen, attptr)
Definition: tupmacs.h:185
static Datum fetch_att(const void *T, bool attbyval, int attlen)
Definition: tupmacs.h:53

References att_addlength_pointer, att_align_nominal, array_iter::bitmapptr, array_iter::bitmask, array_iter::dataptr, array_iter::datumptr, fetch_att(), i, and array_iter::isnullptr.

Referenced by array_cmp(), array_contain_compare(), array_eq(), array_map(), array_out(), array_send(), array_unnest(), hash_array(), and hash_array_extended().

◆ array_iter_setup()

static void array_iter_setup ( array_iter it,
AnyArrayType a 
)
inlinestatic

Definition at line 49 of file arrayaccess.h.

50{
52 {
53 if (a->xpn.dvalues)
54 {
55 it->datumptr = a->xpn.dvalues;
56 it->isnullptr = a->xpn.dnulls;
57 /* we must fill all fields to prevent compiler warnings */
58 it->dataptr = NULL;
59 it->bitmapptr = NULL;
60 }
61 else
62 {
63 /* Work with flat array embedded in the expanded datum */
64 it->datumptr = NULL;
65 it->isnullptr = NULL;
66 it->dataptr = ARR_DATA_PTR(a->xpn.fvalue);
67 it->bitmapptr = ARR_NULLBITMAP(a->xpn.fvalue);
68 }
69 }
70 else
71 {
72 it->datumptr = NULL;
73 it->isnullptr = NULL;
76 }
77 it->bitmask = 1;
78}
#define ARR_DATA_PTR(a)
Definition: array.h:322
#define ARR_NULLBITMAP(a)
Definition: array.h:300
#define VARATT_IS_EXPANDED_HEADER(PTR)
int a
Definition: isn.c:68

References a, ARR_DATA_PTR, ARR_NULLBITMAP, array_iter::bitmapptr, array_iter::bitmask, array_iter::dataptr, array_iter::datumptr, array_iter::isnullptr, and VARATT_IS_EXPANDED_HEADER.

Referenced by array_cmp(), array_contain_compare(), array_eq(), array_map(), array_out(), array_send(), array_unnest(), hash_array(), and hash_array_extended().