PostgreSQL Source Code  git master
execute.c
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1 /* src/interfaces/ecpg/ecpglib/execute.c */
2 
3 /*
4  * The aim is to get a simpler interface to the database routines.
5  * All the tedious messing around with tuples is supposed to be hidden
6  * by this function.
7  */
8 /* Author: Linus Tolke
9  (actually most if the code is "borrowed" from the distribution and just
10  slightly modified)
11  */
12 
13 /* Taken over as part of PostgreSQL by Michael Meskes <meskes@postgresql.org>
14  on Feb. 5th, 1998 */
15 
16 #define POSTGRES_ECPG_INTERNAL
17 #include "postgres_fe.h"
18 
19 #include <math.h>
20 
21 #include "catalog/pg_type_d.h"
22 
23 #include "ecpgtype.h"
24 #include "ecpglib.h"
25 #include "ecpgerrno.h"
26 #include "ecpglib_extern.h"
27 #include "sqlca.h"
28 #include "sqlda-native.h"
29 #include "sqlda-compat.h"
30 #include "sql3types.h"
31 #include "pgtypes_numeric.h"
32 #include "pgtypes_date.h"
33 #include "pgtypes_timestamp.h"
34 #include "pgtypes_interval.h"
35 
36 /*
37  * This function returns a newly malloced string that has ' and \
38  * escaped.
39  */
40 static char *
41 quote_postgres(char *arg, bool quote, int lineno)
42 {
43  char *res;
44  size_t length;
45  size_t escaped_len;
46  size_t buffer_len;
47 
48  /*
49  * if quote is false we just need to store things in a descriptor they
50  * will be quoted once they are inserted in a statement
51  */
52  if (!quote)
53  return arg;
54  else
55  {
56  length = strlen(arg);
57  buffer_len = 2 * length + 1;
58  res = (char *) ecpg_alloc(buffer_len + 3, lineno);
59  if (!res)
60  return res;
61  escaped_len = PQescapeString(res + 1, arg, buffer_len);
62  if (length == escaped_len)
63  {
64  res[0] = res[escaped_len + 1] = '\'';
65  res[escaped_len + 2] = '\0';
66  }
67  else
68  {
69  /*
70  * We don't know if the target database is using
71  * standard_conforming_strings, so we always use E'' strings.
72  */
73  memmove(res + 2, res + 1, escaped_len);
74  res[0] = ESCAPE_STRING_SYNTAX;
75  res[1] = res[escaped_len + 2] = '\'';
76  res[escaped_len + 3] = '\0';
77  }
78  ecpg_free(arg);
79  return res;
80  }
81 }
82 
83 static void
84 free_variable(struct variable *var)
85 {
86  struct variable *var_next;
87 
88  while (var)
89  {
90  var_next = var->next;
91  ecpg_free(var);
92  var = var_next;
93  }
94 }
95 
96 static void
97 free_statement(struct statement *stmt)
98 {
99  if (stmt == NULL)
100  return;
101  free_variable(stmt->inlist);
102  free_variable(stmt->outlist);
103  ecpg_free(stmt->command);
104  ecpg_free(stmt->name);
105 #ifdef HAVE_USELOCALE
106  if (stmt->clocale)
107  freelocale(stmt->clocale);
108 #else
109  ecpg_free(stmt->oldlocale);
110 #endif
111  ecpg_free(stmt);
112 }
113 
114 static int
115 next_insert(char *text, int pos, bool questionmarks, bool std_strings)
116 {
117  bool string = false;
118  int p = pos;
119 
120  for (; text[p] != '\0'; p++)
121  {
122  if (string && !std_strings && text[p] == '\\') /* escape character */
123  p++;
124  else if (text[p] == '\'')
125  string = string ? false : true;
126  else if (!string)
127  {
128  if (text[p] == '$' && isdigit((unsigned char) text[p + 1]))
129  {
130  /* this can be either a dollar quote or a variable */
131  int i;
132 
133  for (i = p + 1; isdigit((unsigned char) text[i]); i++)
134  /* empty loop body */ ;
135  if (!isalpha((unsigned char) text[i]) &&
136  isascii((unsigned char) text[i]) &&text[i] != '_')
137  /* not dollar delimited quote */
138  return p;
139  }
140  else if (questionmarks && text[p] == '?')
141  {
142  /* also allow old style placeholders */
143  return p;
144  }
145  }
146  }
147 
148  return -1;
149 }
150 
151 static bool
152 ecpg_type_infocache_push(struct ECPGtype_information_cache **cache, int oid, enum ARRAY_TYPE isarray, int lineno)
153 {
154  struct ECPGtype_information_cache *new_entry
155  = (struct ECPGtype_information_cache *) ecpg_alloc(sizeof(struct ECPGtype_information_cache), lineno);
156 
157  if (new_entry == NULL)
158  return false;
159 
160  new_entry->oid = oid;
161  new_entry->isarray = isarray;
162  new_entry->next = *cache;
163  *cache = new_entry;
164  return true;
165 }
166 
167 static enum ARRAY_TYPE
168 ecpg_is_type_an_array(int type, const struct statement *stmt, const struct variable *var)
169 {
170  char *array_query;
171  enum ARRAY_TYPE isarray = ECPG_ARRAY_NOT_SET;
172  PGresult *query;
173  struct ECPGtype_information_cache *cache_entry;
174 
175  if ((stmt->connection->cache_head) == NULL)
176  {
177  /*
178  * Text like types are not an array for ecpg, but postgres counts them
179  * as an array. This define reminds you to not 'correct' these values.
180  */
181 #define not_an_array_in_ecpg ECPG_ARRAY_NONE
182 
183  /* populate cache with well known types to speed things up */
184  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), BOOLOID, ECPG_ARRAY_NONE, stmt->lineno))
185  return ECPG_ARRAY_ERROR;
186  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), BYTEAOID, ECPG_ARRAY_NONE, stmt->lineno))
187  return ECPG_ARRAY_ERROR;
188  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), CHAROID, ECPG_ARRAY_NONE, stmt->lineno))
189  return ECPG_ARRAY_ERROR;
190  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), NAMEOID, not_an_array_in_ecpg, stmt->lineno))
191  return ECPG_ARRAY_ERROR;
192  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INT8OID, ECPG_ARRAY_NONE, stmt->lineno))
193  return ECPG_ARRAY_ERROR;
194  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INT2OID, ECPG_ARRAY_NONE, stmt->lineno))
195  return ECPG_ARRAY_ERROR;
196  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INT2VECTOROID, ECPG_ARRAY_VECTOR, stmt->lineno))
197  return ECPG_ARRAY_ERROR;
198  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INT4OID, ECPG_ARRAY_NONE, stmt->lineno))
199  return ECPG_ARRAY_ERROR;
200  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), REGPROCOID, ECPG_ARRAY_NONE, stmt->lineno))
201  return ECPG_ARRAY_ERROR;
202  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TEXTOID, ECPG_ARRAY_NONE, stmt->lineno))
203  return ECPG_ARRAY_ERROR;
204  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), OIDOID, ECPG_ARRAY_NONE, stmt->lineno))
205  return ECPG_ARRAY_ERROR;
206  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TIDOID, ECPG_ARRAY_NONE, stmt->lineno))
207  return ECPG_ARRAY_ERROR;
208  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), XIDOID, ECPG_ARRAY_NONE, stmt->lineno))
209  return ECPG_ARRAY_ERROR;
210  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), CIDOID, ECPG_ARRAY_NONE, stmt->lineno))
211  return ECPG_ARRAY_ERROR;
212  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), OIDVECTOROID, ECPG_ARRAY_VECTOR, stmt->lineno))
213  return ECPG_ARRAY_ERROR;
214  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), POINTOID, ECPG_ARRAY_VECTOR, stmt->lineno))
215  return ECPG_ARRAY_ERROR;
216  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), LSEGOID, ECPG_ARRAY_VECTOR, stmt->lineno))
217  return ECPG_ARRAY_ERROR;
218  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), PATHOID, ECPG_ARRAY_NONE, stmt->lineno))
219  return ECPG_ARRAY_ERROR;
220  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), BOXOID, ECPG_ARRAY_VECTOR, stmt->lineno))
221  return ECPG_ARRAY_ERROR;
222  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), POLYGONOID, ECPG_ARRAY_NONE, stmt->lineno))
223  return ECPG_ARRAY_ERROR;
224  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), LINEOID, ECPG_ARRAY_VECTOR, stmt->lineno))
225  return ECPG_ARRAY_ERROR;
226  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), FLOAT4OID, ECPG_ARRAY_NONE, stmt->lineno))
227  return ECPG_ARRAY_ERROR;
228  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), FLOAT8OID, ECPG_ARRAY_NONE, stmt->lineno))
229  return ECPG_ARRAY_ERROR;
230  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), UNKNOWNOID, ECPG_ARRAY_NONE, stmt->lineno))
231  return ECPG_ARRAY_ERROR;
232  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), CIRCLEOID, ECPG_ARRAY_NONE, stmt->lineno))
233  return ECPG_ARRAY_ERROR;
234  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), CASHOID, ECPG_ARRAY_NONE, stmt->lineno))
235  return ECPG_ARRAY_ERROR;
236  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INETOID, ECPG_ARRAY_NONE, stmt->lineno))
237  return ECPG_ARRAY_ERROR;
238  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), CIDROID, ECPG_ARRAY_NONE, stmt->lineno))
239  return ECPG_ARRAY_ERROR;
240  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), BPCHAROID, ECPG_ARRAY_NONE, stmt->lineno))
241  return ECPG_ARRAY_ERROR;
242  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), VARCHAROID, ECPG_ARRAY_NONE, stmt->lineno))
243  return ECPG_ARRAY_ERROR;
244  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), DATEOID, ECPG_ARRAY_NONE, stmt->lineno))
245  return ECPG_ARRAY_ERROR;
246  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TIMEOID, ECPG_ARRAY_NONE, stmt->lineno))
247  return ECPG_ARRAY_ERROR;
248  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TIMESTAMPOID, ECPG_ARRAY_NONE, stmt->lineno))
249  return ECPG_ARRAY_ERROR;
250  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TIMESTAMPTZOID, ECPG_ARRAY_NONE, stmt->lineno))
251  return ECPG_ARRAY_ERROR;
252  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), INTERVALOID, ECPG_ARRAY_NONE, stmt->lineno))
253  return ECPG_ARRAY_ERROR;
254  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), TIMETZOID, ECPG_ARRAY_NONE, stmt->lineno))
255  return ECPG_ARRAY_ERROR;
256  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), BITOID, ECPG_ARRAY_NONE, stmt->lineno))
257  return ECPG_ARRAY_ERROR;
258  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), VARBITOID, ECPG_ARRAY_NONE, stmt->lineno))
259  return ECPG_ARRAY_ERROR;
260  if (!ecpg_type_infocache_push(&(stmt->connection->cache_head), NUMERICOID, ECPG_ARRAY_NONE, stmt->lineno))
261  return ECPG_ARRAY_ERROR;
262  }
263 
264  for (cache_entry = (stmt->connection->cache_head); cache_entry != NULL; cache_entry = cache_entry->next)
265  {
266  if (cache_entry->oid == type)
267  return cache_entry->isarray;
268  }
269 
270  array_query = (char *) ecpg_alloc(strlen("select typlen from pg_type where oid= and typelem<>0") + 11, stmt->lineno);
271  if (array_query == NULL)
272  return ECPG_ARRAY_ERROR;
273 
274  sprintf(array_query, "select typlen from pg_type where oid=%d and typelem<>0", type);
275  query = PQexec(stmt->connection->connection, array_query);
276  ecpg_free(array_query);
277  if (!ecpg_check_PQresult(query, stmt->lineno, stmt->connection->connection, stmt->compat))
278  return ECPG_ARRAY_ERROR;
279  else if (PQresultStatus(query) == PGRES_TUPLES_OK)
280  {
281  if (PQntuples(query) == 0)
282  isarray = ECPG_ARRAY_NONE;
283  else
284  {
285  isarray = (atol((char *) PQgetvalue(query, 0, 0)) == -1) ? ECPG_ARRAY_ARRAY : ECPG_ARRAY_VECTOR;
286  if (ecpg_dynamic_type(type) == SQL3_CHARACTER ||
287  ecpg_dynamic_type(type) == SQL3_CHARACTER_VARYING)
288  {
289  /*
290  * arrays of character strings are not yet implemented
291  */
292  isarray = ECPG_ARRAY_NONE;
293  }
294  }
295  PQclear(query);
296  }
297  else
298  return ECPG_ARRAY_ERROR;
299 
300  ecpg_type_infocache_push(&(stmt->connection->cache_head), type, isarray, stmt->lineno);
301  ecpg_log("ecpg_is_type_an_array on line %d: type (%d); C (%d); array (%s)\n", stmt->lineno, type, var->type, ECPG_IS_ARRAY(isarray) ? "yes" : "no");
302  return isarray;
303 }
304 
305 
306 bool
307 ecpg_store_result(const PGresult *results, int act_field,
308  const struct statement *stmt, struct variable *var)
309 {
310  enum ARRAY_TYPE isarray;
311  int act_tuple,
312  ntuples = PQntuples(results);
313  bool status = true;
314 
315  if ((isarray = ecpg_is_type_an_array(PQftype(results, act_field), stmt, var)) == ECPG_ARRAY_ERROR)
316  {
317  ecpg_raise(stmt->lineno, ECPG_OUT_OF_MEMORY, ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
318  return false;
319  }
320 
321  if (isarray == ECPG_ARRAY_NONE)
322  {
323  /*
324  * if we don't have enough space, we cannot read all tuples
325  */
326  if ((var->arrsize > 0 && ntuples > var->arrsize) || (var->ind_arrsize > 0 && ntuples > var->ind_arrsize))
327  {
328  ecpg_log("ecpg_store_result on line %d: incorrect number of matches; %d don't fit into array of %ld\n",
329  stmt->lineno, ntuples, var->arrsize);
330  ecpg_raise(stmt->lineno, INFORMIX_MODE(stmt->compat) ? ECPG_INFORMIX_SUBSELECT_NOT_ONE : ECPG_TOO_MANY_MATCHES, ECPG_SQLSTATE_CARDINALITY_VIOLATION, NULL);
331  return false;
332  }
333  }
334  else
335  {
336  /*
337  * since we read an array, the variable has to be an array too
338  */
339  if (var->arrsize == 0)
340  {
341  ecpg_raise(stmt->lineno, ECPG_NO_ARRAY, ECPG_SQLSTATE_DATATYPE_MISMATCH, NULL);
342  return false;
343  }
344  }
345 
346  /*
347  * allocate memory for NULL pointers
348  */
349  if ((var->arrsize == 0 || var->varcharsize == 0) && var->value == NULL)
350  {
351  int len = 0;
352 
353  if (!PQfformat(results, act_field))
354  {
355  switch (var->type)
356  {
357  case ECPGt_char:
358  case ECPGt_unsigned_char:
359  case ECPGt_string:
360  if (!var->varcharsize && !var->arrsize)
361  {
362  /* special mode for handling char**foo=0 */
363  for (act_tuple = 0; act_tuple < ntuples; act_tuple++)
364  len += strlen(PQgetvalue(results, act_tuple, act_field)) + 1;
365  len *= var->offset; /* should be 1, but YMNK */
366  len += (ntuples + 1) * sizeof(char *);
367  }
368  else
369  {
370  var->varcharsize = 0;
371  /* check strlen for each tuple */
372  for (act_tuple = 0; act_tuple < ntuples; act_tuple++)
373  {
374  int len = strlen(PQgetvalue(results, act_tuple, act_field)) + 1;
375 
376  if (len > var->varcharsize)
377  var->varcharsize = len;
378  }
379  var->offset *= var->varcharsize;
380  len = var->offset * ntuples;
381  }
382  break;
383  case ECPGt_varchar:
384  len = ntuples * (var->varcharsize + sizeof(int));
385  break;
386  default:
387  len = var->offset * ntuples;
388  break;
389  }
390  }
391  else
392  {
393  for (act_tuple = 0; act_tuple < ntuples; act_tuple++)
394  len += PQgetlength(results, act_tuple, act_field);
395  }
396 
397  ecpg_log("ecpg_store_result on line %d: allocating memory for %d tuples\n", stmt->lineno, ntuples);
398  var->value = (char *) ecpg_auto_alloc(len, stmt->lineno);
399  if (!var->value)
400  return false;
401  *((char **) var->pointer) = var->value;
402  }
403 
404  /* allocate indicator variable if needed */
405  if ((var->ind_arrsize == 0 || var->ind_varcharsize == 0) && var->ind_value == NULL && var->ind_pointer != NULL)
406  {
407  int len = var->ind_offset * ntuples;
408 
409  var->ind_value = (char *) ecpg_auto_alloc(len, stmt->lineno);
410  if (!var->ind_value)
411  return false;
412  *((char **) var->ind_pointer) = var->ind_value;
413  }
414 
415  /* fill the variable with the tuple(s) */
416  if (!var->varcharsize && !var->arrsize &&
417  (var->type == ECPGt_char || var->type == ECPGt_unsigned_char || var->type == ECPGt_string))
418  {
419  /* special mode for handling char**foo=0 */
420 
421  /* filling the array of (char*)s */
422  char **current_string = (char **) var->value;
423 
424  /* storing the data (after the last array element) */
425  char *current_data_location = (char *) &current_string[ntuples + 1];
426 
427  for (act_tuple = 0; act_tuple < ntuples && status; act_tuple++)
428  {
429  int len = strlen(PQgetvalue(results, act_tuple, act_field)) + 1;
430 
431  if (!ecpg_get_data(results, act_tuple, act_field, stmt->lineno,
432  var->type, var->ind_type, current_data_location,
433  var->ind_value, len, 0, var->ind_offset, isarray, stmt->compat, stmt->force_indicator))
434  status = false;
435  else
436  {
437  *current_string = current_data_location;
438  current_data_location += len;
439  current_string++;
440  }
441  }
442 
443  /* terminate the list */
444  *current_string = NULL;
445  }
446  else
447  {
448  for (act_tuple = 0; act_tuple < ntuples && status; act_tuple++)
449  {
450  if (!ecpg_get_data(results, act_tuple, act_field, stmt->lineno,
451  var->type, var->ind_type, var->value,
452  var->ind_value, var->varcharsize, var->offset, var->ind_offset, isarray, stmt->compat, stmt->force_indicator))
453  status = false;
454  }
455  }
456  return status;
457 }
458 
459 static void
460 sprintf_double_value(char *ptr, double value, const char *delim)
461 {
462  if (isnan(value))
463  sprintf(ptr, "%s%s", "NaN", delim);
464  else if (isinf(value))
465  {
466  if (value < 0)
467  sprintf(ptr, "%s%s", "-Infinity", delim);
468  else
469  sprintf(ptr, "%s%s", "Infinity", delim);
470  }
471  else
472  sprintf(ptr, "%.15g%s", value, delim);
473 }
474 
475 static void
476 sprintf_float_value(char *ptr, float value, const char *delim)
477 {
478  if (isnan(value))
479  sprintf(ptr, "%s%s", "NaN", delim);
480  else if (isinf(value))
481  {
482  if (value < 0)
483  sprintf(ptr, "%s%s", "-Infinity", delim);
484  else
485  sprintf(ptr, "%s%s", "Infinity", delim);
486  }
487  else
488  sprintf(ptr, "%.15g%s", value, delim);
489 }
490 
491 static char *
492 convert_bytea_to_string(char *from_data, int from_len, int lineno)
493 {
494  char *to_data;
495  int to_len = ecpg_hex_enc_len(from_len) + 4 + 1; /* backslash + 'x' +
496  * quote + quote */
497 
498  to_data = ecpg_alloc(to_len, lineno);
499  if (!to_data)
500  return NULL;
501 
502  strcpy(to_data, "'\\x");
503  ecpg_hex_encode(from_data, from_len, to_data + 3);
504  strcpy(to_data + 3 + ecpg_hex_enc_len(from_len), "\'");
505 
506  return to_data;
507 }
508 
509 bool
510 ecpg_store_input(const int lineno, const bool force_indicator, const struct variable *var,
511  char **tobeinserted_p, bool quote)
512 {
513  char *mallocedval = NULL;
514  char *newcopy = NULL;
515 
516  /*
517  * arrays are not possible unless the column is an array, too FIXME: we do
518  * not know if the column is an array here array input to singleton column
519  * will result in a runtime error
520  */
521 
522  /*
523  * Some special treatment is needed for records since we want their
524  * contents to arrive in a comma-separated list on insert (I think).
525  */
526 
527  *tobeinserted_p = "";
528 
529  /* check for null value and set input buffer accordingly */
530  switch (var->ind_type)
531  {
532  case ECPGt_short:
533  case ECPGt_unsigned_short:
534  if (*(short *) var->ind_value < 0)
535  *tobeinserted_p = NULL;
536  break;
537  case ECPGt_int:
538  case ECPGt_unsigned_int:
539  if (*(int *) var->ind_value < 0)
540  *tobeinserted_p = NULL;
541  break;
542  case ECPGt_long:
543  case ECPGt_unsigned_long:
544  if (*(long *) var->ind_value < 0L)
545  *tobeinserted_p = NULL;
546  break;
547 #ifdef HAVE_LONG_LONG_INT
548  case ECPGt_long_long:
549  case ECPGt_unsigned_long_long:
550  if (*(long long int *) var->ind_value < (long long) 0)
551  *tobeinserted_p = NULL;
552  break;
553 #endif /* HAVE_LONG_LONG_INT */
554  case ECPGt_NO_INDICATOR:
555  if (force_indicator == false)
556  {
557  if (ECPGis_noind_null(var->type, var->value))
558  *tobeinserted_p = NULL;
559  }
560  break;
561  default:
562  break;
563  }
564  if (*tobeinserted_p != NULL)
565  {
566  int asize = var->arrsize ? var->arrsize : 1;
567 
568  switch (var->type)
569  {
570  int element;
571 
572  case ECPGt_short:
573  if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
574  return false;
575 
576  if (asize > 1)
577  {
578  strcpy(mallocedval, "{");
579 
580  for (element = 0; element < asize; element++)
581  sprintf(mallocedval + strlen(mallocedval), "%hd,", ((short *) var->value)[element]);
582 
583  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
584  }
585  else
586  sprintf(mallocedval, "%hd", *((short *) var->value));
587 
588  *tobeinserted_p = mallocedval;
589  break;
590 
591  case ECPGt_int:
592  if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
593  return false;
594 
595  if (asize > 1)
596  {
597  strcpy(mallocedval, "{");
598 
599  for (element = 0; element < asize; element++)
600  sprintf(mallocedval + strlen(mallocedval), "%d,", ((int *) var->value)[element]);
601 
602  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
603  }
604  else
605  sprintf(mallocedval, "%d", *((int *) var->value));
606 
607  *tobeinserted_p = mallocedval;
608  break;
609 
610  case ECPGt_unsigned_short:
611  if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
612  return false;
613 
614  if (asize > 1)
615  {
616  strcpy(mallocedval, "{");
617 
618  for (element = 0; element < asize; element++)
619  sprintf(mallocedval + strlen(mallocedval), "%hu,", ((unsigned short *) var->value)[element]);
620 
621  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
622  }
623  else
624  sprintf(mallocedval, "%hu", *((unsigned short *) var->value));
625 
626  *tobeinserted_p = mallocedval;
627  break;
628 
629  case ECPGt_unsigned_int:
630  if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
631  return false;
632 
633  if (asize > 1)
634  {
635  strcpy(mallocedval, "{");
636 
637  for (element = 0; element < asize; element++)
638  sprintf(mallocedval + strlen(mallocedval), "%u,", ((unsigned int *) var->value)[element]);
639 
640  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
641  }
642  else
643  sprintf(mallocedval, "%u", *((unsigned int *) var->value));
644 
645  *tobeinserted_p = mallocedval;
646  break;
647 
648  case ECPGt_long:
649  if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
650  return false;
651 
652  if (asize > 1)
653  {
654  strcpy(mallocedval, "{");
655 
656  for (element = 0; element < asize; element++)
657  sprintf(mallocedval + strlen(mallocedval), "%ld,", ((long *) var->value)[element]);
658 
659  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
660  }
661  else
662  sprintf(mallocedval, "%ld", *((long *) var->value));
663 
664  *tobeinserted_p = mallocedval;
665  break;
666 
667  case ECPGt_unsigned_long:
668  if (!(mallocedval = ecpg_alloc(asize * 20, lineno)))
669  return false;
670 
671  if (asize > 1)
672  {
673  strcpy(mallocedval, "{");
674 
675  for (element = 0; element < asize; element++)
676  sprintf(mallocedval + strlen(mallocedval), "%lu,", ((unsigned long *) var->value)[element]);
677 
678  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
679  }
680  else
681  sprintf(mallocedval, "%lu", *((unsigned long *) var->value));
682 
683  *tobeinserted_p = mallocedval;
684  break;
685 #ifdef HAVE_LONG_LONG_INT
686  case ECPGt_long_long:
687  if (!(mallocedval = ecpg_alloc(asize * 30, lineno)))
688  return false;
689 
690  if (asize > 1)
691  {
692  strcpy(mallocedval, "{");
693 
694  for (element = 0; element < asize; element++)
695  sprintf(mallocedval + strlen(mallocedval), "%lld,", ((long long int *) var->value)[element]);
696 
697  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
698  }
699  else
700  sprintf(mallocedval, "%lld", *((long long int *) var->value));
701 
702  *tobeinserted_p = mallocedval;
703  break;
704 
705  case ECPGt_unsigned_long_long:
706  if (!(mallocedval = ecpg_alloc(asize * 30, lineno)))
707  return false;
708 
709  if (asize > 1)
710  {
711  strcpy(mallocedval, "{");
712 
713  for (element = 0; element < asize; element++)
714  sprintf(mallocedval + strlen(mallocedval), "%llu,", ((unsigned long long int *) var->value)[element]);
715 
716  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
717  }
718  else
719  sprintf(mallocedval, "%llu", *((unsigned long long int *) var->value));
720 
721  *tobeinserted_p = mallocedval;
722  break;
723 #endif /* HAVE_LONG_LONG_INT */
724  case ECPGt_float:
725  if (!(mallocedval = ecpg_alloc(asize * 25, lineno)))
726  return false;
727 
728  if (asize > 1)
729  {
730  strcpy(mallocedval, "{");
731 
732  for (element = 0; element < asize; element++)
733  sprintf_float_value(mallocedval + strlen(mallocedval), ((float *) var->value)[element], ",");
734 
735  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
736  }
737  else
738  sprintf_float_value(mallocedval, *((float *) var->value), "");
739 
740  *tobeinserted_p = mallocedval;
741  break;
742 
743  case ECPGt_double:
744  if (!(mallocedval = ecpg_alloc(asize * 25, lineno)))
745  return false;
746 
747  if (asize > 1)
748  {
749  strcpy(mallocedval, "{");
750 
751  for (element = 0; element < asize; element++)
752  sprintf_double_value(mallocedval + strlen(mallocedval), ((double *) var->value)[element], ",");
753 
754  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
755  }
756  else
757  sprintf_double_value(mallocedval, *((double *) var->value), "");
758 
759  *tobeinserted_p = mallocedval;
760  break;
761 
762  case ECPGt_bool:
763  if (!(mallocedval = ecpg_alloc(var->arrsize + sizeof("{}"), lineno)))
764  return false;
765 
766  if (var->arrsize > 1)
767  {
768  strcpy(mallocedval, "{");
769 
770  for (element = 0; element < asize; element++)
771  sprintf(mallocedval + strlen(mallocedval), "%c,", (((bool *) var->value)[element]) ? 't' : 'f');
772 
773  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
774  }
775  else
776  {
777  if (var->offset == sizeof(char))
778  sprintf(mallocedval, "%c", (*((char *) var->value)) ? 't' : 'f');
779  else if (var->offset == sizeof(int))
780  sprintf(mallocedval, "%c", (*((int *) var->value)) ? 't' : 'f');
781  else
782  ecpg_raise(lineno, ECPG_CONVERT_BOOL, ECPG_SQLSTATE_DATATYPE_MISMATCH, NULL);
783  }
784 
785  *tobeinserted_p = mallocedval;
786  break;
787 
788  case ECPGt_char:
789  case ECPGt_unsigned_char:
790  case ECPGt_string:
791  {
792  /* set slen to string length if type is char * */
793  int slen = (var->varcharsize == 0) ? strlen((char *) var->value) : (unsigned int) var->varcharsize;
794 
795  if (!(newcopy = ecpg_alloc(slen + 1, lineno)))
796  return false;
797 
798  strncpy(newcopy, (char *) var->value, slen);
799  newcopy[slen] = '\0';
800 
801  mallocedval = quote_postgres(newcopy, quote, lineno);
802  if (!mallocedval)
803  {
804  ecpg_free(newcopy);
805  return false;
806  }
807 
808  *tobeinserted_p = mallocedval;
809  }
810  break;
811  case ECPGt_const:
812  case ECPGt_char_variable:
813  {
814  int slen = strlen((char *) var->value);
815 
816  if (!(mallocedval = ecpg_alloc(slen + 1, lineno)))
817  return false;
818 
819  strncpy(mallocedval, (char *) var->value, slen);
820  mallocedval[slen] = '\0';
821 
822  *tobeinserted_p = mallocedval;
823  }
824  break;
825 
826  case ECPGt_bytea:
827  {
828  struct ECPGgeneric_varchar *variable =
829  (struct ECPGgeneric_varchar *) (var->value);
830 
831  if (!(mallocedval = (char *) ecpg_alloc(variable->len, lineno)))
832  return false;
833 
834  memcpy(mallocedval, variable->arr, variable->len);
835  *tobeinserted_p = mallocedval;
836  }
837  break;
838 
839  case ECPGt_varchar:
840  {
841  struct ECPGgeneric_varchar *variable =
842  (struct ECPGgeneric_varchar *) (var->value);
843 
844  if (!(newcopy = (char *) ecpg_alloc(variable->len + 1, lineno)))
845  return false;
846 
847  strncpy(newcopy, variable->arr, variable->len);
848  newcopy[variable->len] = '\0';
849 
850  mallocedval = quote_postgres(newcopy, quote, lineno);
851  if (!mallocedval)
852  {
853  ecpg_free(newcopy);
854  return false;
855  }
856 
857  *tobeinserted_p = mallocedval;
858  }
859  break;
860 
861  case ECPGt_decimal:
862  case ECPGt_numeric:
863  {
864  char *str = NULL;
865  int slen;
866  numeric *nval;
867 
868  if (var->arrsize > 1)
869  mallocedval = ecpg_strdup("{", lineno);
870  else
871  mallocedval = ecpg_strdup("", lineno);
872 
873  if (!mallocedval)
874  return false;
875 
876  for (element = 0; element < asize; element++)
877  {
878  int result;
879 
880  nval = PGTYPESnumeric_new();
881  if (!nval)
882  {
883  ecpg_free(mallocedval);
884  return false;
885  }
886 
887  if (var->type == ECPGt_numeric)
888  result = PGTYPESnumeric_copy(&(((numeric *) (var->value))[element]), nval);
889  else
890  result = PGTYPESnumeric_from_decimal(&(((decimal *) (var->value))[element]), nval);
891 
892  if (result != 0)
893  {
894  PGTYPESnumeric_free(nval);
895  ecpg_free(mallocedval);
896  return false;
897  }
898 
899  str = PGTYPESnumeric_to_asc(nval, nval->dscale);
900  slen = strlen(str);
901  PGTYPESnumeric_free(nval);
902 
903  if (!(newcopy = ecpg_realloc(mallocedval, strlen(mallocedval) + slen + 2, lineno)))
904  {
905  ecpg_free(mallocedval);
906  ecpg_free(str);
907  return false;
908  }
909  mallocedval = newcopy;
910 
911  /* also copy trailing '\0' */
912  memcpy(mallocedval + strlen(mallocedval), str, slen + 1);
913  if (var->arrsize > 1)
914  strcpy(mallocedval + strlen(mallocedval), ",");
915 
916  ecpg_free(str);
917  }
918 
919  if (var->arrsize > 1)
920  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
921 
922  *tobeinserted_p = mallocedval;
923  }
924  break;
925 
926  case ECPGt_interval:
927  {
928  char *str = NULL;
929  int slen;
930 
931  if (var->arrsize > 1)
932  mallocedval = ecpg_strdup("{", lineno);
933  else
934  mallocedval = ecpg_strdup("", lineno);
935 
936  if (!mallocedval)
937  return false;
938 
939  for (element = 0; element < asize; element++)
940  {
941  str = quote_postgres(PGTYPESinterval_to_asc(&(((interval *) (var->value))[element])), quote, lineno);
942  if (!str)
943  {
944  ecpg_free(mallocedval);
945  return false;
946  }
947 
948  slen = strlen(str);
949 
950  if (!(newcopy = ecpg_realloc(mallocedval, strlen(mallocedval) + slen + 2, lineno)))
951  {
952  ecpg_free(mallocedval);
953  ecpg_free(str);
954  return false;
955  }
956  mallocedval = newcopy;
957 
958  /* also copy trailing '\0' */
959  memcpy(mallocedval + strlen(mallocedval), str, slen + 1);
960  if (var->arrsize > 1)
961  strcpy(mallocedval + strlen(mallocedval), ",");
962 
963  ecpg_free(str);
964  }
965 
966  if (var->arrsize > 1)
967  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
968 
969  *tobeinserted_p = mallocedval;
970  }
971  break;
972 
973  case ECPGt_date:
974  {
975  char *str = NULL;
976  int slen;
977 
978  if (var->arrsize > 1)
979  mallocedval = ecpg_strdup("{", lineno);
980  else
981  mallocedval = ecpg_strdup("", lineno);
982 
983  if (!mallocedval)
984  return false;
985 
986  for (element = 0; element < asize; element++)
987  {
988  str = quote_postgres(PGTYPESdate_to_asc(((date *) (var->value))[element]), quote, lineno);
989  if (!str)
990  {
991  ecpg_free(mallocedval);
992  return false;
993  }
994 
995  slen = strlen(str);
996 
997  if (!(newcopy = ecpg_realloc(mallocedval, strlen(mallocedval) + slen + 2, lineno)))
998  {
999  ecpg_free(mallocedval);
1000  ecpg_free(str);
1001  return false;
1002  }
1003  mallocedval = newcopy;
1004 
1005  /* also copy trailing '\0' */
1006  memcpy(mallocedval + strlen(mallocedval), str, slen + 1);
1007  if (var->arrsize > 1)
1008  strcpy(mallocedval + strlen(mallocedval), ",");
1009 
1010  ecpg_free(str);
1011  }
1012 
1013  if (var->arrsize > 1)
1014  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
1015 
1016  *tobeinserted_p = mallocedval;
1017  }
1018  break;
1019 
1020  case ECPGt_timestamp:
1021  {
1022  char *str = NULL;
1023  int slen;
1024 
1025  if (var->arrsize > 1)
1026  mallocedval = ecpg_strdup("{", lineno);
1027  else
1028  mallocedval = ecpg_strdup("", lineno);
1029 
1030  if (!mallocedval)
1031  return false;
1032 
1033  for (element = 0; element < asize; element++)
1034  {
1035  str = quote_postgres(PGTYPEStimestamp_to_asc(((timestamp *) (var->value))[element]), quote, lineno);
1036  if (!str)
1037  {
1038  ecpg_free(mallocedval);
1039  return false;
1040  }
1041 
1042  slen = strlen(str);
1043 
1044  if (!(newcopy = ecpg_realloc(mallocedval, strlen(mallocedval) + slen + 2, lineno)))
1045  {
1046  ecpg_free(mallocedval);
1047  ecpg_free(str);
1048  return false;
1049  }
1050  mallocedval = newcopy;
1051 
1052  /* also copy trailing '\0' */
1053  memcpy(mallocedval + strlen(mallocedval), str, slen + 1);
1054  if (var->arrsize > 1)
1055  strcpy(mallocedval + strlen(mallocedval), ",");
1056 
1057  ecpg_free(str);
1058  }
1059 
1060  if (var->arrsize > 1)
1061  strcpy(mallocedval + strlen(mallocedval) - 1, "}");
1062 
1063  *tobeinserted_p = mallocedval;
1064  }
1065  break;
1066 
1067  case ECPGt_descriptor:
1068  case ECPGt_sqlda:
1069  break;
1070 
1071  default:
1072  /* Not implemented yet */
1073  ecpg_raise(lineno, ECPG_UNSUPPORTED, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, ecpg_type_name(var->type));
1074  return false;
1075  break;
1076  }
1077  }
1078  return true;
1079 }
1080 
1081 static void
1082 print_param_value(char *value, int len, int is_binary, int lineno, int nth)
1083 {
1084  char *value_s;
1085  bool malloced = false;
1086 
1087  if (value == NULL)
1088  value_s = "null";
1089  else if (!is_binary)
1090  value_s = value;
1091  else
1092  {
1093  value_s = ecpg_alloc(ecpg_hex_enc_len(len) + 1, lineno);
1094  if (value_s != NULL)
1095  {
1096  ecpg_hex_encode(value, len, value_s);
1097  value_s[ecpg_hex_enc_len(len)] = '\0';
1098  malloced = true;
1099  }
1100  else
1101  value_s = "no memory for logging of parameter";
1102  }
1103 
1104  ecpg_log("ecpg_free_params on line %d: parameter %d = %s\n",
1105  lineno, nth, value_s);
1106 
1107  if (malloced)
1108  ecpg_free(value_s);
1109 }
1110 
1111 void
1112 ecpg_free_params(struct statement *stmt, bool print)
1113 {
1114  int n;
1115 
1116  for (n = 0; n < stmt->nparams; n++)
1117  {
1118  if (print)
1119  print_param_value(stmt->paramvalues[n], stmt->paramlengths[n],
1120  stmt->paramformats[n], stmt->lineno, n + 1);
1121  ecpg_free(stmt->paramvalues[n]);
1122  }
1123  ecpg_free(stmt->paramvalues);
1124  ecpg_free(stmt->paramlengths);
1125  ecpg_free(stmt->paramformats);
1126  stmt->paramvalues = NULL;
1127  stmt->paramlengths = NULL;
1128  stmt->paramformats = NULL;
1129  stmt->nparams = 0;
1130 }
1131 
1132 static bool
1133 insert_tobeinserted(int position, int ph_len, struct statement *stmt, char *tobeinserted)
1134 {
1135  char *newcopy;
1136 
1137  if (!(newcopy = (char *) ecpg_alloc(strlen(stmt->command)
1138  + strlen(tobeinserted)
1139  + 1, stmt->lineno)))
1140  {
1141  ecpg_free(tobeinserted);
1142  return false;
1143  }
1144 
1145  strcpy(newcopy, stmt->command);
1146  strcpy(newcopy + position - 1, tobeinserted);
1147 
1148  /*
1149  * The strange thing in the second argument is the rest of the string from
1150  * the old string
1151  */
1152  strcat(newcopy,
1153  stmt->command
1154  + position
1155  + ph_len - 1);
1156 
1157  ecpg_free(stmt->command);
1158  stmt->command = newcopy;
1159 
1160  ecpg_free(tobeinserted);
1161  return true;
1162 }
1163 
1164 static bool
1165 store_input_from_desc(struct statement *stmt, struct descriptor_item *desc_item,
1166  char **tobeinserted)
1167 {
1168  struct variable var;
1169 
1170  /*
1171  * In case of binary data, only allocate memory and memcpy because binary
1172  * data have been already stored into desc_item->data with
1173  * ecpg_store_input() at ECPGset_desc().
1174  */
1175  if (desc_item->is_binary)
1176  {
1177  if (!(*tobeinserted = ecpg_alloc(desc_item->data_len, stmt->lineno)))
1178  return false;
1179  memcpy(*tobeinserted, desc_item->data, desc_item->data_len);
1180  return true;
1181  }
1182 
1183  var.type = ECPGt_char;
1184  var.varcharsize = strlen(desc_item->data);
1185  var.value = desc_item->data;
1186  var.pointer = &(desc_item->data);
1187  var.arrsize = 1;
1188  var.offset = 0;
1189 
1190  if (!desc_item->indicator)
1191  {
1192  var.ind_type = ECPGt_NO_INDICATOR;
1193  var.ind_value = var.ind_pointer = NULL;
1194  var.ind_varcharsize = var.ind_arrsize = var.ind_offset = 0;
1195  }
1196  else
1197  {
1198  var.ind_type = ECPGt_int;
1199  var.ind_value = &(desc_item->indicator);
1200  var.ind_pointer = &(var.ind_value);
1201  var.ind_varcharsize = var.ind_arrsize = 1;
1202  var.ind_offset = 0;
1203  }
1204 
1205  if (!ecpg_store_input(stmt->lineno, stmt->force_indicator, &var, tobeinserted, false))
1206  return false;
1207 
1208  return true;
1209 }
1210 
1211 /*
1212  * ecpg_build_params
1213  * Build statement parameters
1214  *
1215  * The input values are taken from user variables, and the results are stored
1216  * in arrays which can be used by PQexecParams().
1217  */
1218 bool
1219 ecpg_build_params(struct statement *stmt)
1220 {
1221  struct variable *var;
1222  int desc_counter = 0;
1223  int position = 0;
1224  const char *value;
1225  bool std_strings = false;
1226 
1227  /* Get standard_conforming_strings setting. */
1228  value = PQparameterStatus(stmt->connection->connection, "standard_conforming_strings");
1229  if (value && strcmp(value, "on") == 0)
1230  std_strings = true;
1231 
1232  /*
1233  * If the type is one of the fill in types then we take the argument and
1234  * enter it to our parameter array at the first position. Then if there
1235  * are any more fill in types we add more parameters.
1236  */
1237  var = stmt->inlist;
1238  while (var)
1239  {
1240  char *tobeinserted;
1241  int counter = 1;
1242  bool binary_format;
1243  int binary_length;
1244 
1245 
1246  tobeinserted = NULL;
1247  binary_length = 0;
1248  binary_format = false;
1249 
1250  /*
1251  * A descriptor is a special case since it contains many variables but
1252  * is listed only once.
1253  */
1254  if (var->type == ECPGt_descriptor)
1255  {
1256  /*
1257  * We create an additional variable list here, so the same logic
1258  * applies.
1259  */
1260  struct descriptor *desc;
1261  struct descriptor_item *desc_item;
1262 
1263  desc = ecpg_find_desc(stmt->lineno, var->pointer);
1264  if (desc == NULL)
1265  return false;
1266 
1267  desc_counter++;
1268  for (desc_item = desc->items; desc_item; desc_item = desc_item->next)
1269  {
1270  if (desc_item->num != desc_counter)
1271  continue;
1272 
1273  if (!store_input_from_desc(stmt, desc_item, &tobeinserted))
1274  return false;
1275 
1276  if (desc_item->is_binary)
1277  {
1278  binary_length = desc_item->data_len;
1279  binary_format = true;
1280  }
1281  break;
1282  }
1283  if (desc->count == desc_counter)
1284  desc_counter = 0;
1285  }
1286  else if (var->type == ECPGt_sqlda)
1287  {
1288  if (INFORMIX_MODE(stmt->compat))
1289  {
1290  struct sqlda_compat *sqlda = *(struct sqlda_compat **) var->pointer;
1291  struct variable desc_inlist;
1292  int i;
1293 
1294  if (sqlda == NULL)
1295  return false;
1296 
1297  desc_counter++;
1298  for (i = 0; i < sqlda->sqld; i++)
1299  {
1300  if (i + 1 == desc_counter)
1301  {
1302  desc_inlist.type = sqlda->sqlvar[i].sqltype;
1303  desc_inlist.value = sqlda->sqlvar[i].sqldata;
1304  desc_inlist.pointer = &(sqlda->sqlvar[i].sqldata);
1305  switch (desc_inlist.type)
1306  {
1307  case ECPGt_char:
1308  case ECPGt_varchar:
1309  desc_inlist.varcharsize = strlen(sqlda->sqlvar[i].sqldata);
1310  break;
1311  default:
1312  desc_inlist.varcharsize = 0;
1313  break;
1314  }
1315  desc_inlist.arrsize = 1;
1316  desc_inlist.offset = 0;
1317  if (sqlda->sqlvar[i].sqlind)
1318  {
1319  desc_inlist.ind_type = ECPGt_short;
1320  /* ECPG expects indicator value < 0 */
1321  if (*(sqlda->sqlvar[i].sqlind))
1322  *(sqlda->sqlvar[i].sqlind) = -1;
1323  desc_inlist.ind_value = sqlda->sqlvar[i].sqlind;
1324  desc_inlist.ind_pointer = &(sqlda->sqlvar[i].sqlind);
1325  desc_inlist.ind_varcharsize = desc_inlist.ind_arrsize = 1;
1326  desc_inlist.ind_offset = 0;
1327  }
1328  else
1329  {
1330  desc_inlist.ind_type = ECPGt_NO_INDICATOR;
1331  desc_inlist.ind_value = desc_inlist.ind_pointer = NULL;
1332  desc_inlist.ind_varcharsize = desc_inlist.ind_arrsize = desc_inlist.ind_offset = 0;
1333  }
1334  if (!ecpg_store_input(stmt->lineno, stmt->force_indicator, &desc_inlist, &tobeinserted, false))
1335  return false;
1336 
1337  break;
1338  }
1339  }
1340  if (sqlda->sqld == desc_counter)
1341  desc_counter = 0;
1342  }
1343  else
1344  {
1345  struct sqlda_struct *sqlda = *(struct sqlda_struct **) var->pointer;
1346  struct variable desc_inlist;
1347  int i;
1348 
1349  if (sqlda == NULL)
1350  return false;
1351 
1352  desc_counter++;
1353  for (i = 0; i < sqlda->sqln; i++)
1354  {
1355  if (i + 1 == desc_counter)
1356  {
1357  desc_inlist.type = sqlda->sqlvar[i].sqltype;
1358  desc_inlist.value = sqlda->sqlvar[i].sqldata;
1359  desc_inlist.pointer = &(sqlda->sqlvar[i].sqldata);
1360  switch (desc_inlist.type)
1361  {
1362  case ECPGt_char:
1363  case ECPGt_varchar:
1364  desc_inlist.varcharsize = strlen(sqlda->sqlvar[i].sqldata);
1365  break;
1366  default:
1367  desc_inlist.varcharsize = 0;
1368  break;
1369  }
1370  desc_inlist.arrsize = 1;
1371  desc_inlist.offset = 0;
1372  if (sqlda->sqlvar[i].sqlind)
1373  {
1374  desc_inlist.ind_type = ECPGt_short;
1375  /* ECPG expects indicator value < 0 */
1376  if (*(sqlda->sqlvar[i].sqlind))
1377  *(sqlda->sqlvar[i].sqlind) = -1;
1378  desc_inlist.ind_value = sqlda->sqlvar[i].sqlind;
1379  desc_inlist.ind_pointer = &(sqlda->sqlvar[i].sqlind);
1380  desc_inlist.ind_varcharsize = desc_inlist.ind_arrsize = 1;
1381  desc_inlist.ind_offset = 0;
1382  }
1383  else
1384  {
1385  desc_inlist.ind_type = ECPGt_NO_INDICATOR;
1386  desc_inlist.ind_value = desc_inlist.ind_pointer = NULL;
1387  desc_inlist.ind_varcharsize = desc_inlist.ind_arrsize = desc_inlist.ind_offset = 0;
1388  }
1389  if (!ecpg_store_input(stmt->lineno, stmt->force_indicator, &desc_inlist, &tobeinserted, false))
1390  return false;
1391 
1392  break;
1393  }
1394  }
1395  if (sqlda->sqln == desc_counter)
1396  desc_counter = 0;
1397  }
1398 
1399  }
1400  else
1401  {
1402  if (!ecpg_store_input(stmt->lineno, stmt->force_indicator, var, &tobeinserted, false))
1403  return false;
1404 
1405  if (var->type == ECPGt_bytea)
1406  {
1407  binary_length = ((struct ECPGgeneric_varchar *) (var->value))->len;
1408  binary_format = true;
1409  }
1410  }
1411 
1412  /*
1413  * now tobeinserted points to an area that contains the next
1414  * parameter; now find the position in the string where it belongs
1415  */
1416  if ((position = next_insert(stmt->command, position, stmt->questionmarks, std_strings) + 1) == 0)
1417  {
1418  /*
1419  * We have an argument but we don't have the matched up
1420  * placeholder in the string
1421  */
1422  ecpg_raise(stmt->lineno, ECPG_TOO_MANY_ARGUMENTS,
1423  ECPG_SQLSTATE_USING_CLAUSE_DOES_NOT_MATCH_PARAMETERS,
1424  NULL);
1425  ecpg_free_params(stmt, false);
1426  ecpg_free(tobeinserted);
1427  return false;
1428  }
1429 
1430  /*
1431  * if var->type=ECPGt_char_variable we have a dynamic cursor we have
1432  * to simulate a dynamic cursor because there is no backend
1433  * functionality for it
1434  */
1435  if (var->type == ECPGt_char_variable)
1436  {
1437  int ph_len = (stmt->command[position] == '?') ? strlen("?") : strlen("$1");
1438 
1439  if (!insert_tobeinserted(position, ph_len, stmt, tobeinserted))
1440  {
1441  ecpg_free_params(stmt, false);
1442  return false;
1443  }
1444  tobeinserted = NULL;
1445  }
1446 
1447  /*
1448  * if the placeholder is '$0' we have to replace it on the client side
1449  * this is for places we want to support variables at that are not
1450  * supported in the backend
1451  */
1452  else if (stmt->command[position] == '0')
1453  {
1454  if (stmt->statement_type == ECPGst_prepare ||
1455  stmt->statement_type == ECPGst_exec_with_exprlist)
1456  {
1457  /* Need to double-quote the inserted statement name. */
1458  char *str = ecpg_alloc(strlen(tobeinserted) + 2 + 1,
1459  stmt->lineno);
1460 
1461  if (!str)
1462  {
1463  ecpg_free(tobeinserted);
1464  ecpg_free_params(stmt, false);
1465  return false;
1466  }
1467  sprintf(str, "\"%s\"", tobeinserted);
1468  ecpg_free(tobeinserted);
1469  tobeinserted = str;
1470  }
1471 
1472  if (!insert_tobeinserted(position, 2, stmt, tobeinserted))
1473  {
1474  ecpg_free_params(stmt, false);
1475  return false;
1476  }
1477  tobeinserted = NULL;
1478  }
1479  else if (stmt->statement_type == ECPGst_exec_with_exprlist)
1480  {
1481  if (binary_format)
1482  {
1483  char *p = convert_bytea_to_string(tobeinserted,
1484  binary_length,
1485  stmt->lineno);
1486 
1487  ecpg_free(tobeinserted);
1488  if (!p)
1489  {
1490  ecpg_free_params(stmt, false);
1491  return false;
1492  }
1493  tobeinserted = p;
1494  }
1495 
1496  if (!insert_tobeinserted(position, 2, stmt, tobeinserted))
1497  {
1498  ecpg_free_params(stmt, false);
1499  return false;
1500  }
1501  tobeinserted = NULL;
1502  }
1503  else
1504  {
1505  if (!(stmt->paramvalues = (char **) ecpg_realloc(stmt->paramvalues, sizeof(char *) * (stmt->nparams + 1), stmt->lineno)))
1506  {
1507  ecpg_free_params(stmt, false);
1508  ecpg_free(tobeinserted);
1509  return false;
1510  }
1511  stmt->paramvalues[stmt->nparams] = tobeinserted;
1512 
1513  if (!(stmt->paramlengths = (int *) ecpg_realloc(stmt->paramlengths, sizeof(int) * (stmt->nparams + 1), stmt->lineno)))
1514  {
1515  ecpg_free_params(stmt, false);
1516  return false;
1517  }
1518  stmt->paramlengths[stmt->nparams] = binary_length;
1519 
1520  if (!(stmt->paramformats = (int *) ecpg_realloc(stmt->paramformats, sizeof(int) * (stmt->nparams + 1), stmt->lineno)))
1521  {
1522  ecpg_free_params(stmt, false);
1523  return false;
1524  }
1525  stmt->paramformats[stmt->nparams] = (binary_format ? 1 : 0);
1526  stmt->nparams++;
1527 
1528  /* let's see if this was an old style placeholder */
1529  if (stmt->command[position] == '?')
1530  {
1531  /* yes, replace with new style */
1532  int buffersize = sizeof(int) * CHAR_BIT * 10 / 3; /* a rough guess of the
1533  * size we need */
1534 
1535  if (!(tobeinserted = (char *) ecpg_alloc(buffersize, stmt->lineno)))
1536  {
1537  ecpg_free_params(stmt, false);
1538  return false;
1539  }
1540 
1541  snprintf(tobeinserted, buffersize, "$%d", counter++);
1542 
1543  if (!insert_tobeinserted(position, 2, stmt, tobeinserted))
1544  {
1545  ecpg_free_params(stmt, false);
1546  return false;
1547  }
1548  tobeinserted = NULL;
1549  }
1550  }
1551 
1552  if (desc_counter == 0)
1553  var = var->next;
1554  }
1555 
1556  /*
1557  * Check if there are unmatched things left. PREPARE AS has no parameter.
1558  * Check other statement.
1559  */
1560  if (stmt->statement_type != ECPGst_prepare &&
1561  next_insert(stmt->command, position, stmt->questionmarks, std_strings) >= 0)
1562  {
1563  ecpg_raise(stmt->lineno, ECPG_TOO_FEW_ARGUMENTS,
1564  ECPG_SQLSTATE_USING_CLAUSE_DOES_NOT_MATCH_PARAMETERS, NULL);
1565  ecpg_free_params(stmt, false);
1566  return false;
1567  }
1568 
1569  return true;
1570 }
1571 
1572 /*
1573  * ecpg_autostart_transaction
1574  * If we are in non-autocommit mode, automatically start a transaction.
1575  */
1576 bool
1577 ecpg_autostart_transaction(struct statement *stmt)
1578 {
1579  if (PQtransactionStatus(stmt->connection->connection) == PQTRANS_IDLE && !stmt->connection->autocommit)
1580  {
1581  stmt->results = PQexec(stmt->connection->connection, "begin transaction");
1582  if (!ecpg_check_PQresult(stmt->results, stmt->lineno, stmt->connection->connection, stmt->compat))
1583  {
1584  ecpg_free_params(stmt, false);
1585  return false;
1586  }
1587  PQclear(stmt->results);
1588  stmt->results = NULL;
1589  }
1590  return true;
1591 }
1592 
1593 /*
1594  * ecpg_execute
1595  * Execute the SQL statement.
1596  */
1597 bool
1598 ecpg_execute(struct statement *stmt)
1599 {
1600  ecpg_log("ecpg_execute on line %d: query: %s; with %d parameter(s) on connection %s\n", stmt->lineno, stmt->command, stmt->nparams, stmt->connection->name);
1601  if (stmt->statement_type == ECPGst_execute)
1602  {
1603  stmt->results = PQexecPrepared(stmt->connection->connection,
1604  stmt->name,
1605  stmt->nparams,
1606  (const char *const *) stmt->paramvalues,
1607  (const int *) stmt->paramlengths,
1608  (const int *) stmt->paramformats,
1609  0);
1610  ecpg_log("ecpg_execute on line %d: using PQexecPrepared for \"%s\"\n", stmt->lineno, stmt->command);
1611  }
1612  else
1613  {
1614  if (stmt->nparams == 0)
1615  {
1616  stmt->results = PQexec(stmt->connection->connection, stmt->command);
1617  ecpg_log("ecpg_execute on line %d: using PQexec\n", stmt->lineno);
1618  }
1619  else
1620  {
1621  stmt->results = PQexecParams(stmt->connection->connection,
1622  stmt->command, stmt->nparams, NULL,
1623  (const char *const *) stmt->paramvalues,
1624  (const int *) stmt->paramlengths,
1625  (const int *) stmt->paramformats,
1626  0);
1627 
1628  ecpg_log("ecpg_execute on line %d: using PQexecParams\n", stmt->lineno);
1629  }
1630 
1631  if (stmt->statement_type == ECPGst_prepare)
1632  {
1633  if (!ecpg_register_prepared_stmt(stmt))
1634  {
1635  ecpg_free_params(stmt, true);
1636  return false;
1637  }
1638  }
1639  }
1640 
1641  ecpg_free_params(stmt, true);
1642 
1643  if (!ecpg_check_PQresult(stmt->results, stmt->lineno, stmt->connection->connection, stmt->compat))
1644  return false;
1645 
1646  return true;
1647 }
1648 
1649 /*-------
1650  * ecpg_process_output
1651  *
1652  * Process the statement result and store it into application variables. This
1653  * function can be called repeatedly during the same statement in case cursor
1654  * readahead is used and the application does FETCH N which overflows the
1655  * readahead window.
1656  *
1657  * Parameters
1658  * stmt statement structure holding the PGresult and
1659  * the list of output variables
1660  * clear_result
1661  * PQclear() the result upon returning from this function
1662  *
1663  * Returns success as boolean. Also an SQL error is raised in case of failure.
1664  *-------
1665  */
1666 bool
1667 ecpg_process_output(struct statement *stmt, bool clear_result)
1668 {
1669  struct variable *var;
1670  bool status = false;
1671  char *cmdstat;
1672  PGnotify *notify;
1673  struct sqlca_t *sqlca = ECPGget_sqlca();
1674  int nfields,
1675  ntuples,
1676  act_field;
1677 
1678  if (sqlca == NULL)
1679  {
1680  ecpg_raise(stmt->lineno, ECPG_OUT_OF_MEMORY,
1681  ECPG_SQLSTATE_ECPG_OUT_OF_MEMORY, NULL);
1682  return false;
1683  }
1684 
1685  var = stmt->outlist;
1686  switch (PQresultStatus(stmt->results))
1687  {
1688  case PGRES_TUPLES_OK:
1689  nfields = PQnfields(stmt->results);
1690  sqlca->sqlerrd[2] = ntuples = PQntuples(stmt->results);
1691 
1692  ecpg_log("ecpg_process_output on line %d: correctly got %d tuples with %d fields\n", stmt->lineno, ntuples, nfields);
1693  status = true;
1694 
1695  if (ntuples < 1)
1696  {
1697  if (ntuples)
1698  ecpg_log("ecpg_process_output on line %d: incorrect number of matches (%d)\n",
1699  stmt->lineno, ntuples);
1700  ecpg_raise(stmt->lineno, ECPG_NOT_FOUND, ECPG_SQLSTATE_NO_DATA, NULL);
1701  status = false;
1702  break;
1703  }
1704 
1705  if (var != NULL && var->type == ECPGt_descriptor)
1706  {
1707  struct descriptor *desc = ecpg_find_desc(stmt->lineno, var->pointer);
1708 
1709  if (desc == NULL)
1710  status = false;
1711  else
1712  {
1713  if (desc->result)
1714  PQclear(desc->result);
1715  desc->result = stmt->results;
1716  clear_result = false;
1717  ecpg_log("ecpg_process_output on line %d: putting result (%d tuples) into descriptor %s\n",
1718  stmt->lineno, PQntuples(stmt->results), (const char *) var->pointer);
1719  }
1720  var = var->next;
1721  }
1722  else if (var != NULL && var->type == ECPGt_sqlda)
1723  {
1724  if (INFORMIX_MODE(stmt->compat))
1725  {
1726  struct sqlda_compat **_sqlda = (struct sqlda_compat **) var->pointer;
1727  struct sqlda_compat *sqlda = *_sqlda;
1728  struct sqlda_compat *sqlda_new;
1729  int i;
1730 
1731  /*
1732  * If we are passed in a previously existing sqlda (chain)
1733  * then free it.
1734  */
1735  while (sqlda)
1736  {
1737  sqlda_new = sqlda->desc_next;
1738  free(sqlda);
1739  sqlda = sqlda_new;
1740  }
1741  *_sqlda = sqlda = sqlda_new = NULL;
1742  for (i = ntuples - 1; i >= 0; i--)
1743  {
1744  /*
1745  * Build a new sqlda structure. Note that only
1746  * fetching 1 record is supported
1747  */
1748  sqlda_new = ecpg_build_compat_sqlda(stmt->lineno, stmt->results, i, stmt->compat);
1749 
1750  if (!sqlda_new)
1751  {
1752  /* cleanup all SQLDAs we created up */
1753  while (sqlda)
1754  {
1755  sqlda_new = sqlda->desc_next;
1756  free(sqlda);
1757  sqlda = sqlda_new;
1758  }
1759  *_sqlda = NULL;
1760 
1761  ecpg_log("ecpg_process_output on line %d: out of memory allocating a new sqlda\n", stmt->lineno);
1762  status = false;
1763  break;
1764  }
1765  else
1766  {
1767  ecpg_log("ecpg_process_output on line %d: new sqlda was built\n", stmt->lineno);
1768 
1769  *_sqlda = sqlda_new;
1770 
1771  ecpg_set_compat_sqlda(stmt->lineno, _sqlda, stmt->results, i, stmt->compat);
1772  ecpg_log("ecpg_process_output on line %d: putting result (1 tuple %d fields) into sqlda descriptor\n",
1773  stmt->lineno, PQnfields(stmt->results));
1774 
1775  sqlda_new->desc_next = sqlda;
1776  sqlda = sqlda_new;
1777  }
1778  }
1779  }
1780  else
1781  {
1782  struct sqlda_struct **_sqlda = (struct sqlda_struct **) var->pointer;
1783  struct sqlda_struct *sqlda = *_sqlda;
1784  struct sqlda_struct *sqlda_new;
1785  int i;
1786 
1787  /*
1788  * If we are passed in a previously existing sqlda (chain)
1789  * then free it.
1790  */
1791  while (sqlda)
1792  {
1793  sqlda_new = sqlda->desc_next;
1794  free(sqlda);
1795  sqlda = sqlda_new;
1796  }
1797  *_sqlda = sqlda = sqlda_new = NULL;
1798  for (i = ntuples - 1; i >= 0; i--)
1799  {
1800  /*
1801  * Build a new sqlda structure. Note that only
1802  * fetching 1 record is supported
1803  */
1804  sqlda_new = ecpg_build_native_sqlda(stmt->lineno, stmt->results, i, stmt->compat);
1805 
1806  if (!sqlda_new)
1807  {
1808  /* cleanup all SQLDAs we created up */
1809  while (sqlda)
1810  {
1811  sqlda_new = sqlda->desc_next;
1812  free(sqlda);
1813  sqlda = sqlda_new;
1814  }
1815  *_sqlda = NULL;
1816 
1817  ecpg_log("ecpg_process_output on line %d: out of memory allocating a new sqlda\n", stmt->lineno);
1818  status = false;
1819  break;
1820  }
1821  else
1822  {
1823  ecpg_log("ecpg_process_output on line %d: new sqlda was built\n", stmt->lineno);
1824 
1825  *_sqlda = sqlda_new;
1826 
1827  ecpg_set_native_sqlda(stmt->lineno, _sqlda, stmt->results, i, stmt->compat);
1828  ecpg_log("ecpg_process_output on line %d: putting result (1 tuple %d fields) into sqlda descriptor\n",
1829  stmt->lineno, PQnfields(stmt->results));
1830 
1831  sqlda_new->desc_next = sqlda;
1832  sqlda = sqlda_new;
1833  }
1834  }
1835  }
1836 
1837  var = var->next;
1838  }
1839  else
1840  for (act_field = 0; act_field < nfields && status; act_field++)
1841  {
1842  if (var != NULL)
1843  {
1844  status = ecpg_store_result(stmt->results, act_field, stmt, var);
1845  var = var->next;
1846  }
1847  else if (!INFORMIX_MODE(stmt->compat))
1848  {
1849  ecpg_raise(stmt->lineno, ECPG_TOO_FEW_ARGUMENTS, ECPG_SQLSTATE_USING_CLAUSE_DOES_NOT_MATCH_TARGETS, NULL);
1850  return false;
1851  }
1852  }
1853 
1854  if (status && var != NULL)
1855  {
1856  ecpg_raise(stmt->lineno, ECPG_TOO_MANY_ARGUMENTS, ECPG_SQLSTATE_USING_CLAUSE_DOES_NOT_MATCH_TARGETS, NULL);
1857  status = false;
1858  }
1859 
1860  break;
1861  case PGRES_COMMAND_OK:
1862  status = true;
1863  cmdstat = PQcmdStatus(stmt->results);
1864  sqlca->sqlerrd[1] = PQoidValue(stmt->results);
1865  sqlca->sqlerrd[2] = atol(PQcmdTuples(stmt->results));
1866  ecpg_log("ecpg_process_output on line %d: OK: %s\n", stmt->lineno, cmdstat);
1867  if (stmt->compat != ECPG_COMPAT_INFORMIX_SE &&
1868  !sqlca->sqlerrd[2] &&
1869  (strncmp(cmdstat, "UPDATE", 6) == 0
1870  || strncmp(cmdstat, "INSERT", 6) == 0
1871  || strncmp(cmdstat, "DELETE", 6) == 0))
1872  ecpg_raise(stmt->lineno, ECPG_NOT_FOUND, ECPG_SQLSTATE_NO_DATA, NULL);
1873  break;
1874  case PGRES_COPY_OUT:
1875  {
1876  char *buffer;
1877  int res;
1878 
1879  ecpg_log("ecpg_process_output on line %d: COPY OUT data transfer in progress\n", stmt->lineno);
1880  while ((res = PQgetCopyData(stmt->connection->connection,
1881  &buffer, 0)) > 0)
1882  {
1883  printf("%s", buffer);
1884  PQfreemem(buffer);
1885  }
1886  if (res == -1)
1887  {
1888  /* COPY done */
1889  PQclear(stmt->results);
1890  stmt->results = PQgetResult(stmt->connection->connection);
1891  if (PQresultStatus(stmt->results) == PGRES_COMMAND_OK)
1892  ecpg_log("ecpg_process_output on line %d: got PGRES_COMMAND_OK after PGRES_COPY_OUT\n", stmt->lineno);
1893  else
1894  ecpg_log("ecpg_process_output on line %d: got error after PGRES_COPY_OUT: %s", stmt->lineno, PQresultErrorMessage(stmt->results));
1895  }
1896  break;
1897  }
1898  default:
1899 
1900  /*
1901  * execution should never reach this code because it is already
1902  * handled in ecpg_check_PQresult()
1903  */
1904  ecpg_log("ecpg_process_output on line %d: unknown execution status type\n",
1905  stmt->lineno);
1906  ecpg_raise_backend(stmt->lineno, stmt->results, stmt->connection->connection, stmt->compat);
1907  status = false;
1908  break;
1909  }
1910 
1911  if (clear_result)
1912  {
1913  PQclear(stmt->results);
1914  stmt->results = NULL;
1915  }
1916 
1917  /* check for asynchronous returns */
1918  PQconsumeInput(stmt->connection->connection);
1919  while ((notify = PQnotifies(stmt->connection->connection)) != NULL)
1920  {
1921  ecpg_log("ecpg_process_output on line %d: asynchronous notification of \"%s\" from backend PID %d received\n",
1922  stmt->lineno, notify->relname, notify->be_pid);
1923  PQfreemem(notify);
1924  PQconsumeInput(stmt->connection->connection);
1925  }
1926 
1927  return status;
1928 }
1929 
1930 /*
1931  * ecpg_do_prologue
1932  *
1933  * Initialize various infrastructure elements for executing the statement:
1934  *
1935  * - create the statement structure
1936  * - set the C numeric locale for communicating with the backend
1937  * - preprocess the variable list of input/output parameters into
1938  * linked lists
1939  */
1940 bool
1941 ecpg_do_prologue(int lineno, const int compat, const int force_indicator,
1942  const char *connection_name, const bool questionmarks,
1943  enum ECPG_statement_type statement_type, const char *query,
1944  va_list args, struct statement **stmt_out)
1945 {
1946  struct statement *stmt = NULL;
1947  struct connection *con;
1948  enum ECPGttype type;
1949  struct variable **list;
1950  char *prepname;
1951  bool is_prepared_name_set;
1952 
1953  *stmt_out = NULL;
1954 
1955  if (!query)
1956  {
1957  ecpg_raise(lineno, ECPG_EMPTY, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, NULL);
1958  return false;
1959  }
1960 
1961  stmt = (struct statement *) ecpg_alloc(sizeof(struct statement), lineno);
1962 
1963  if (stmt == NULL)
1964  return false;
1965 
1966  /*
1967  * Make sure we do NOT honor the locale for numeric input/output since the
1968  * database wants the standard decimal point. If available, use
1969  * uselocale() for this because it's thread-safe. Windows doesn't have
1970  * that, but it usually does have _configthreadlocale(). In some versions
1971  * of MinGW, _configthreadlocale() exists but always returns -1 --- so
1972  * treat that situation as if the function doesn't exist.
1973  */
1974 #ifdef HAVE_USELOCALE
1975  stmt->clocale = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
1976  if (stmt->clocale == (locale_t) 0)
1977  {
1978  ecpg_do_epilogue(stmt);
1979  return false;
1980  }
1981  stmt->oldlocale = uselocale(stmt->clocale);
1982  if (stmt->oldlocale == (locale_t) 0)
1983  {
1984  ecpg_do_epilogue(stmt);
1985  return false;
1986  }
1987 #else
1988 #ifdef HAVE__CONFIGTHREADLOCALE
1989  stmt->oldthreadlocale = _configthreadlocale(_ENABLE_PER_THREAD_LOCALE);
1990 #endif
1991  stmt->oldlocale = ecpg_strdup(setlocale(LC_NUMERIC, NULL), lineno);
1992  if (stmt->oldlocale == NULL)
1993  {
1994  ecpg_do_epilogue(stmt);
1995  return false;
1996  }
1997  setlocale(LC_NUMERIC, "C");
1998 #endif
1999 
2000 #ifdef ENABLE_THREAD_SAFETY
2001  ecpg_pthreads_init();
2002 #endif
2003 
2004  con = ecpg_get_connection(connection_name);
2005 
2006  if (!ecpg_init(con, connection_name, lineno))
2007  {
2008  ecpg_do_epilogue(stmt);
2009  return false;
2010  }
2011 
2012  /*
2013  * If statement type is ECPGst_prepnormal we are supposed to prepare the
2014  * statement before executing them
2015  */
2016  if (statement_type == ECPGst_prepnormal)
2017  {
2018  if (!ecpg_auto_prepare(lineno, connection_name, compat, &prepname, query))
2019  {
2020  ecpg_do_epilogue(stmt);
2021  return false;
2022  }
2023 
2024  /*
2025  * statement is now prepared, so instead of the query we have to
2026  * execute the name
2027  */
2028  stmt->command = prepname;
2029  statement_type = ECPGst_execute;
2030  }
2031  else
2032  stmt->command = ecpg_strdup(query, lineno);
2033 
2034  stmt->name = NULL;
2035 
2036  if (statement_type == ECPGst_execute)
2037  {
2038  /* if we have an EXECUTE command, only the name is send */
2039  char *command = ecpg_prepared(stmt->command, con);
2040 
2041  if (command)
2042  {
2043  stmt->name = stmt->command;
2044  stmt->command = ecpg_strdup(command, lineno);
2045  }
2046  else
2047  {
2048  ecpg_raise(lineno, ECPG_INVALID_STMT, ECPG_SQLSTATE_INVALID_SQL_STATEMENT_NAME, stmt->command);
2049  ecpg_do_epilogue(stmt);
2050  return false;
2051  }
2052  }
2053  /* name of PREPARE AS will be set in loop of inlist */
2054 
2055  stmt->connection = con;
2056  stmt->lineno = lineno;
2057  stmt->compat = compat;
2058  stmt->force_indicator = force_indicator;
2059  stmt->questionmarks = questionmarks;
2060  stmt->statement_type = statement_type;
2061 
2062  /*------
2063  * create a list of variables
2064  *
2065  * The variables are listed with input variables preceding output
2066  * variables. The end of each group is marked by an end marker.
2067  * Per variable we list:
2068  *
2069  * type - as defined in ecpgtype.h
2070  * value - where to store the data
2071  * varcharsize - length of string in case we have a stringvariable, else 0
2072  * arraysize - 0 for pointer (we don't know the size of the array), 1 for
2073  * simple variable, size for arrays
2074  * offset - offset between ith and (i+1)th entry in an array, normally
2075  * that means sizeof(type)
2076  * ind_type - type of indicator variable
2077  * ind_pointer - pointer to indicator variable
2078  * ind_varcharsize - empty
2079  * ind_arrsize - arraysize of indicator array
2080  * ind_offset - indicator offset
2081  *------
2082  */
2083 
2084  is_prepared_name_set = false;
2085 
2086  list = &(stmt->inlist);
2087 
2088  type = va_arg(args, enum ECPGttype);
2089 
2090  while (type != ECPGt_EORT)
2091  {
2092  if (type == ECPGt_EOIT)
2093  list = &(stmt->outlist);
2094  else
2095  {
2096  struct variable *var,
2097  *ptr;
2098 
2099  if (!(var = (struct variable *) ecpg_alloc(sizeof(struct variable), lineno)))
2100  {
2101  ecpg_do_epilogue(stmt);
2102  return false;
2103  }
2104 
2105  var->type = type;
2106  var->pointer = va_arg(args, char *);
2107 
2108  var->varcharsize = va_arg(args, long);
2109  var->arrsize = va_arg(args, long);
2110  var->offset = va_arg(args, long);
2111 
2112  /*
2113  * Unknown array size means pointer to an array. Unknown
2114  * varcharsize usually also means pointer. But if the type is
2115  * character and the array size is known, it is an array of
2116  * pointers to char, so use var->pointer as it is.
2117  */
2118  if (var->arrsize == 0 ||
2119  (var->varcharsize == 0 && ((var->type != ECPGt_char && var->type != ECPGt_unsigned_char) || (var->arrsize <= 1))))
2120  var->value = *((char **) (var->pointer));
2121  else
2122  var->value = var->pointer;
2123 
2124  /*
2125  * negative values are used to indicate an array without given
2126  * bounds
2127  */
2128  /* reset to zero for us */
2129  if (var->arrsize < 0)
2130  var->arrsize = 0;
2131  if (var->varcharsize < 0)
2132  var->varcharsize = 0;
2133 
2134  var->next = NULL;
2135 
2136  var->ind_type = va_arg(args, enum ECPGttype);
2137  var->ind_pointer = va_arg(args, char *);
2138  var->ind_varcharsize = va_arg(args, long);
2139  var->ind_arrsize = va_arg(args, long);
2140  var->ind_offset = va_arg(args, long);
2141 
2142  if (var->ind_type != ECPGt_NO_INDICATOR
2143  && (var->ind_arrsize == 0 || var->ind_varcharsize == 0))
2144  var->ind_value = *((char **) (var->ind_pointer));
2145  else
2146  var->ind_value = var->ind_pointer;
2147 
2148  /*
2149  * negative values are used to indicate an array without given
2150  * bounds
2151  */
2152  /* reset to zero for us */
2153  if (var->ind_arrsize < 0)
2154  var->ind_arrsize = 0;
2155  if (var->ind_varcharsize < 0)
2156  var->ind_varcharsize = 0;
2157 
2158  /* if variable is NULL, the statement hasn't been prepared */
2159  if (var->pointer == NULL)
2160  {
2161  ecpg_raise(lineno, ECPG_INVALID_STMT, ECPG_SQLSTATE_INVALID_SQL_STATEMENT_NAME, NULL);
2162  ecpg_free(var);
2163  ecpg_do_epilogue(stmt);
2164  return false;
2165  }
2166 
2167  for (ptr = *list; ptr && ptr->next; ptr = ptr->next)
2168  ;
2169 
2170  if (ptr == NULL)
2171  *list = var;
2172  else
2173  ptr->next = var;
2174 
2175  if (!is_prepared_name_set && stmt->statement_type == ECPGst_prepare)
2176  {
2177  stmt->name = ecpg_strdup(var->value, lineno);
2178  is_prepared_name_set = true;
2179  }
2180  }
2181 
2182  type = va_arg(args, enum ECPGttype);
2183  }
2184 
2185  /* are we connected? */
2186  if (con == NULL || con->connection == NULL)
2187  {
2188  ecpg_raise(lineno, ECPG_NOT_CONN, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, (con) ? con->name : ecpg_gettext("<empty>"));
2189  ecpg_do_epilogue(stmt);
2190  return false;
2191  }
2192 
2193  if (!is_prepared_name_set && stmt->statement_type == ECPGst_prepare)
2194  {
2195  ecpg_raise(lineno, ECPG_TOO_FEW_ARGUMENTS, ECPG_SQLSTATE_ECPG_INTERNAL_ERROR, (con) ? con->name : ecpg_gettext("<empty>"));
2196  ecpg_do_epilogue(stmt);
2197  return false;
2198  }
2199 
2200  /* initialize auto_mem struct */
2201  ecpg_clear_auto_mem();
2202 
2203  *stmt_out = stmt;
2204 
2205  return true;
2206 }
2207 
2208 /*
2209  * ecpg_do_epilogue
2210  * Restore the application locale and free the statement structure.
2211  */
2212 void
2213 ecpg_do_epilogue(struct statement *stmt)
2214 {
2215  if (stmt == NULL)
2216  return;
2217 
2218 #ifdef HAVE_USELOCALE
2219  if (stmt->oldlocale != (locale_t) 0)
2220  uselocale(stmt->oldlocale);
2221 #else
2222  if (stmt->oldlocale)
2223  setlocale(LC_NUMERIC, stmt->oldlocale);
2224 #ifdef HAVE__CONFIGTHREADLOCALE
2225 
2226  /*
2227  * This is a bit trickier than it looks: if we failed partway through
2228  * statement initialization, oldthreadlocale could still be 0. But that's
2229  * okay because a call with 0 is defined to be a no-op.
2230  */
2231  if (stmt->oldthreadlocale != -1)
2232  (void) _configthreadlocale(stmt->oldthreadlocale);
2233 #endif
2234 #endif
2235 
2236  free_statement(stmt);
2237 }
2238 
2239 /*
2240  * Execute SQL statements in the backend.
2241  * The input/output parameters (variable argument list) are passed
2242  * in a va_list, so other functions can use this interface.
2243  */
2244 bool
2245 ecpg_do(const int lineno, const int compat, const int force_indicator, const char *connection_name, const bool questionmarks, const int st, const char *query, va_list args)
2246 {
2247  struct statement *stmt = NULL;
2248 
2249  if (!ecpg_do_prologue(lineno, compat, force_indicator, connection_name,
2250  questionmarks, (enum ECPG_statement_type) st,
2251  query, args, &stmt))
2252  goto fail;
2253 
2254  if (!ecpg_build_params(stmt))
2255  goto fail;
2256 
2257  if (!ecpg_autostart_transaction(stmt))
2258  goto fail;
2259 
2260  if (!ecpg_execute(stmt))
2261  goto fail;
2262 
2263  if (!ecpg_process_output(stmt, true))
2264  goto fail;
2265 
2266  ecpg_do_epilogue(stmt);
2267  return true;
2268 
2269 fail:
2270  ecpg_do_epilogue(stmt);
2271  return false;
2272 }
2273 
2274 /*
2275  * Execute SQL statements in the backend.
2276  * The input/output parameters are passed as variable-length argument list.
2277  */
2278 bool
2279 ECPGdo(const int lineno, const int compat, const int force_indicator, const char *connection_name, const bool questionmarks, const int st, const char *query,...)
2280 {
2281  va_list args;
2282  bool ret;
2283 
2284  va_start(args, query);
2285  ret = ecpg_do(lineno, compat, force_indicator, connection_name,
2286  questionmarks, st, query, args);
2287  va_end(args);
2288 
2289  return ret;
2290 }
2291 
2292 /* old descriptor interface */
2293 bool
2294 ECPGdo_descriptor(int line, const char *connection,
2295  const char *descriptor, const char *query)
2296 {
2297  return ECPGdo(line, ECPG_COMPAT_PGSQL, true, connection, '\0', 0, query, ECPGt_EOIT,
2298  ECPGt_descriptor, descriptor, 0L, 0L, 0L,
2299  ECPGt_NO_INDICATOR, NULL, 0L, 0L, 0L, ECPGt_EORT);
2300 }
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Definition: ecpgerrno.h:10
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Definition: execute.c:1941
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Definition: ecpglib_extern.h:143
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Definition: sqlda-compat.h:39
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Definition: interval.c:1066
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Definition: misc.c:391
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Definition: ecpgerrno.h:58
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Definition: execute.c:2213
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Definition: ecpglib_extern.h:85
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Definition: ecpglib_extern.h:132
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Definition: fe-exec.c:2709
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Definition: fe-exec.c:1954
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Definition: ecpglib_extern.h:72
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Definition: execute.c:460
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Definition: ecpg.c:18
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Definition: ecpglib_extern.h:144
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Definition: ecpglib_extern.h:86
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Definition: execute.c:510
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Definition: sqlda-compat.h:13
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Definition: fe-exec.c:1940
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Definition: ecpglib_extern.h:59
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Definition: execute.c:2245
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Definition: ecpglib_extern.h:58
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Definition: fe-exec.c:2997
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Definition: port.h:192
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Definition: fe-exec.c:3297
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Definition: misc.c:105
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Definition: fe-exec.c:1779
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Definition: error.c:219
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Definition: ecpglib_extern.h:140
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Definition: sqlda-compat.h:40
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Definition: ecpgtype.h:41