include/apr_dbd.h

   1 /* Licensed to the Apache Software Foundation (ASF) under one or more
   2  * contributor license agreements.  See the NOTICE file distributed with
   3  * this work for additional information regarding copyright ownership.
   4  * The ASF licenses this file to You under the Apache License, Version 2.0
   5  * (the "License"); you may not use this file except in compliance with
   6  * the License.  You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /* Overview of what this is and does:
  18  * http://www.apache.org/~niq/dbd.html
  19  */
  20
  21 #ifndef APR_DBD_H
  22 #define APR_DBD_H
  23
  24 #include "apu.h"
  25 #include "apr_pools.h"
  26
  27 #ifdef __cplusplus
  28 extern "C" {
  29 #endif
  30
  31 /**
  32  * @file apr_dbd.h
  33  * @brief APR-UTIL DBD library
  34  */
  35 /**
  36  * @defgroup APR_Util_DBD DBD routines
  37  * @ingroup APR_Util
  38  * @{
  39  */
  40
  41 /**
  42  * Mapping of C to SQL types, used for prepared statements.
  43  * @remarks
  44  * For apr_dbd_p[v]query/select functions, in and out parameters are always
  45  * const char * (i.e. regular nul terminated strings). LOB types are passed
  46  * with four (4) arguments: payload, length, table and column, all as const
  47  * char *, where table and column are reserved for future use by Oracle.
  48  * @remarks
  49  * For apr_dbd_p[v]bquery/select functions, in and out parameters are
  50  * described next to each enumeration constant and are generally native binary
  51  * types or some APR data type. LOB types are passed with four (4) arguments:
  52  * payload (char*), length (apr_size_t*), table (char*) and column (char*).
  53  * Table and column are reserved for future use by Oracle.
  54  */
  55 typedef enum {
  56     APR_DBD_TYPE_NONE,
  57     APR_DBD_TYPE_TINY,       /**< \%hhd : in, out: char* */
  58     APR_DBD_TYPE_UTINY,      /**< \%hhu : in, out: unsigned char* */
  59     APR_DBD_TYPE_SHORT,      /**< \%hd  : in, out: short* */
  60     APR_DBD_TYPE_USHORT,     /**< \%hu  : in, out: unsigned short* */
  61     APR_DBD_TYPE_INT,        /**< \%d   : in, out: int* */
  62     APR_DBD_TYPE_UINT,       /**< \%u   : in, out: unsigned int* */
  63     APR_DBD_TYPE_LONG,       /**< \%ld  : in, out: long* */
  64     APR_DBD_TYPE_ULONG,      /**< \%lu  : in, out: unsigned long* */
  65     APR_DBD_TYPE_LONGLONG,   /**< \%lld : in, out: apr_int64_t* */
  66     APR_DBD_TYPE_ULONGLONG,  /**< \%llu : in, out: apr_uint64_t* */
  67     APR_DBD_TYPE_FLOAT,      /**< \%f   : in, out: float* */
  68     APR_DBD_TYPE_DOUBLE,     /**< \%lf  : in, out: double* */
  69     APR_DBD_TYPE_STRING,     /**< \%s   : in: char*, out: char** */
  70     APR_DBD_TYPE_TEXT,       /**< \%pDt : in: char*, out: char** */
  71     APR_DBD_TYPE_TIME,       /**< \%pDi : in: char*, out: char** */
  72     APR_DBD_TYPE_DATE,       /**< \%pDd : in: char*, out: char** */
  73     APR_DBD_TYPE_DATETIME,   /**< \%pDa : in: char*, out: char** */
  74     APR_DBD_TYPE_TIMESTAMP,  /**< \%pDs : in: char*, out: char** */
  75     APR_DBD_TYPE_ZTIMESTAMP, /**< \%pDz : in: char*, out: char** */
  76     APR_DBD_TYPE_BLOB,       /**< \%pDb : in: char* apr_size_t* char* char*, out: apr_bucket_brigade* */
  77     APR_DBD_TYPE_CLOB,       /**< \%pDc : in: char* apr_size_t* char* char*, out: apr_bucket_brigade* */
  78     APR_DBD_TYPE_NULL        /**< \%pDn : in: void*, out: void** */
  79 } apr_dbd_type_e;
  80
  81 /* These are opaque structs.  Instantiation is up to each backend */
  82 typedef struct apr_dbd_driver_t apr_dbd_driver_t;
  83 typedef struct apr_dbd_t apr_dbd_t;
  84 typedef struct apr_dbd_transaction_t apr_dbd_transaction_t;
  85 typedef struct apr_dbd_results_t apr_dbd_results_t;
  86 typedef struct apr_dbd_row_t apr_dbd_row_t;
  87 typedef struct apr_dbd_prepared_t apr_dbd_prepared_t;
  88
  89 /** apr_dbd_init: perform once-only initialisation.  Call once only.
  90  *
  91  *  @param pool - pool to register any shutdown cleanups, etc
  92  */
  93 APU_DECLARE(apr_status_t) apr_dbd_init(apr_pool_t *pool);
  94
  95 /** apr_dbd_get_driver: get the driver struct for a name
  96  *
  97  *  @param pool - (process) pool to register cleanup
  98  *  @param name - driver name
  99  *  @param driver - pointer to driver struct.
 100  *  @return APR_SUCCESS for success
 101  *  @return APR_ENOTIMPL for no driver (when DSO not enabled)
 102  *  @return APR_EDSOOPEN if DSO driver file can't be opened
 103  *  @return APR_ESYMNOTFOUND if the driver file doesn't contain a driver
 104  */
 105 APU_DECLARE(apr_status_t) apr_dbd_get_driver(apr_pool_t *pool, const char *name,
 106                                              const apr_dbd_driver_t **driver);
 107
 108 /** apr_dbd_open_ex: open a connection to a backend
 109  *
 110  *  @param pool - working pool
 111  *  @param params - arguments to driver (implementation-dependent)
 112  *  @param handle - pointer to handle to return
 113  *  @param driver - driver struct.
 114  *  @param error - descriptive error.
 115  *  @return APR_SUCCESS for success
 116  *  @return APR_EGENERAL if driver exists but connection failed
 117  *  @remarks PostgreSQL: the params is passed directly to the PQconnectdb()
 118  *  function (check PostgreSQL documentation for more details on the syntax).
 119  *  @remarks SQLite2: the params is split on a colon, with the first part used
 120  *  as the filename and second part converted to an integer and used as file
 121  *  mode.
 122  *  @remarks SQLite3: the params is passed directly to the sqlite3_open()
 123  *  function as a filename to be opened (check SQLite3 documentation for more
 124  *  details).
 125  *  @remarks Oracle: the params can have "user", "pass", "dbname" and "server"
 126  *  keys, each followed by an equal sign and a value. Such key/value pairs can
 127  *  be delimited by space, CR, LF, tab, semicolon, vertical bar or comma.
 128  *  @remarks MySQL: the params can have "host", "port", "user", "pass",
 129  *  "dbname", "sock", "flags" "fldsz", "group" and "reconnect" keys, each
 130  *  followed by an equal sign and a value. Such key/value pairs can be
 131  *  delimited by space, CR, LF, tab, semicolon, vertical bar or comma. For
 132  *  now, "flags" can only recognise CLIENT_FOUND_ROWS (check MySQL manual for
 133  *  details). The value associated with "fldsz" determines maximum amount of
 134  *  memory (in bytes) for each of the fields in the result set of prepared
 135  *  statements. By default, this value is 1 MB. The value associated with
 136  *  "group" determines which group from configuration file to use (see
 137  *  MYSQL_READ_DEFAULT_GROUP option of mysql_options() in MySQL manual).
 138  *  Reconnect is set to 1 by default (i.e. true).
 139  *  @remarks FreeTDS: the params can have "username", "password", "appname",
 140  *  "dbname", "host", "charset", "lang" and "server" keys, each followed by an
 141  *  equal sign and a value.
 142  */
 143 APU_DECLARE(apr_status_t) apr_dbd_open_ex(const apr_dbd_driver_t *driver,
 144                                           apr_pool_t *pool, const char *params,
 145                                           apr_dbd_t **handle,
 146                                           const char **error);
 147
 148 /** apr_dbd_open: open a connection to a backend
 149  *
 150  *  @param pool - working pool
 151  *  @param params - arguments to driver (implementation-dependent)
 152  *  @param handle - pointer to handle to return
 153  *  @param driver - driver struct.
 154  *  @return APR_SUCCESS for success
 155  *  @return APR_EGENERAL if driver exists but connection failed
 156  *  @see apr_dbd_open_ex
 157  */
 158 APU_DECLARE(apr_status_t) apr_dbd_open(const apr_dbd_driver_t *driver,
 159                                        apr_pool_t *pool, const char *params,
 160                                        apr_dbd_t **handle);
 161
 162 /** apr_dbd_close: close a connection to a backend
 163  *
 164  *  @param handle - handle to close
 165  *  @param driver - driver struct.
 166  *  @return APR_SUCCESS for success or error status
 167  */
 168 APU_DECLARE(apr_status_t) apr_dbd_close(const apr_dbd_driver_t *driver,
 169                                         apr_dbd_t *handle);
 170
 171 /* apr-function-shaped versions of things */
 172
 173 /** apr_dbd_name: get the name of the driver
 174  *
 175  *  @param driver - the driver
 176  *  @return - name
 177  */
 178 APU_DECLARE(const char*) apr_dbd_name(const apr_dbd_driver_t *driver);
 179
 180 /** apr_dbd_native_handle: get native database handle of the underlying db
 181  *
 182  *  @param driver - the driver
 183  *  @param handle - apr_dbd handle
 184  *  @return - native handle
 185  */
 186 APU_DECLARE(void*) apr_dbd_native_handle(const apr_dbd_driver_t *driver,
 187                                          apr_dbd_t *handle);
 188
 189 /** check_conn: check status of a database connection
 190  *
 191  *  @param driver - the driver
 192  *  @param pool - working pool
 193  *  @param handle - the connection to check
 194  *  @return APR_SUCCESS or error
 195  */
 196 APU_DECLARE(int) apr_dbd_check_conn(const apr_dbd_driver_t *driver, apr_pool_t *pool,
 197                                     apr_dbd_t *handle);
 198
 199 /** apr_dbd_set_dbname: select database name.  May be a no-op if not supported.
 200  *
 201  *  @param driver - the driver
 202  *  @param pool - working pool
 203  *  @param handle - the connection
 204  *  @param name - the database to select
 205  *  @return 0 for success or error code
 206  */
 207 APU_DECLARE(int) apr_dbd_set_dbname(const apr_dbd_driver_t *driver, apr_pool_t *pool,
 208                                     apr_dbd_t *handle, const char *name);
 209
 210 /** apr_dbd_transaction_start: start a transaction.  May be a no-op.
 211  *
 212  *  @param driver - the driver
 213  *  @param pool - a pool to use for error messages (if any).
 214  *  @param handle - the db connection
 215  *  @param trans - ptr to a transaction.  May be null on entry
 216  *  @return 0 for success or error code
 217  *  @remarks Note that transaction modes, set by calling
 218  *  apr_dbd_transaction_mode_set(), will affect all query/select calls within
 219  *  a transaction. By default, any error in query/select during a transaction
 220  *  will cause the transaction to inherit the error code and any further
 221  *  query/select calls will fail immediately. Put transaction in "ignore
 222  *  errors" mode to avoid that. Use "rollback" mode to do explicit rollback.
 223  */
 224 APU_DECLARE(int) apr_dbd_transaction_start(const apr_dbd_driver_t *driver,
 225                                            apr_pool_t *pool,
 226                                            apr_dbd_t *handle,
 227                                            apr_dbd_transaction_t **trans);
 228
 229 /** apr_dbd_transaction_end: end a transaction
 230  *  (commit on success, rollback on error).
 231  *  May be a no-op.
 232  *
 233  *  @param driver - the driver
 234  *  @param handle - the db connection
 235  *  @param trans - the transaction.
 236  *  @return 0 for success or error code
 237  */
 238 APU_DECLARE(int) apr_dbd_transaction_end(const apr_dbd_driver_t *driver,
 239                                          apr_pool_t *pool,
 240                                          apr_dbd_transaction_t *trans);
 241
 242 #define APR_DBD_TRANSACTION_COMMIT        0x00  /**< commit the transaction */
 243 #define APR_DBD_TRANSACTION_ROLLBACK      0x01  /**< rollback the transaction */
 244 #define APR_DBD_TRANSACTION_IGNORE_ERRORS 0x02  /**< ignore transaction errors */
 245
 246 /** apr_dbd_transaction_mode_get: get the mode of transaction
 247  *
 248  *  @param driver - the driver
 249  *  @param trans  - the transaction
 250  *  @return mode of transaction
 251  */
 252 APU_DECLARE(int) apr_dbd_transaction_mode_get(const apr_dbd_driver_t *driver,
 253                                               apr_dbd_transaction_t *trans);
 254
 255 /** apr_dbd_transaction_mode_set: set the mode of transaction
 256  *
 257  *  @param driver - the driver
 258  *  @param trans  - the transaction
 259  *  @param mode   - new mode of the transaction
 260  *  @return the mode of transaction in force after the call
 261  */
 262 APU_DECLARE(int) apr_dbd_transaction_mode_set(const apr_dbd_driver_t *driver,
 263                                               apr_dbd_transaction_t *trans,
 264                                               int mode);
 265
 266 /** apr_dbd_query: execute an SQL query that doesn't return a result set
 267  *
 268  *  @param driver - the driver
 269  *  @param handle - the connection
 270  *  @param nrows - number of rows affected.
 271  *  @param statement - the SQL statement to execute
 272  *  @return 0 for success or error code
 273  */
 274 APU_DECLARE(int) apr_dbd_query(const apr_dbd_driver_t *driver, apr_dbd_t *handle,
 275                                int *nrows, const char *statement);
 276
 277 /** apr_dbd_select: execute an SQL query that returns a result set
 278  *
 279  *  @param driver - the driver
 280  *  @param pool - pool to allocate the result set
 281  *  @param handle - the connection
 282  *  @param res - pointer to result set pointer.  May point to NULL on entry
 283  *  @param statement - the SQL statement to execute
 284  *  @param random - 1 to support random access to results (seek any row);
 285  *                  0 to support only looping through results in order
 286  *                    (async access - faster)
 287  *  @return 0 for success or error code
 288  */
 289 APU_DECLARE(int) apr_dbd_select(const apr_dbd_driver_t *driver, apr_pool_t *pool,
 290                                 apr_dbd_t *handle, apr_dbd_results_t **res,
 291                                 const char *statement, int random);
 292
 293 /** apr_dbd_num_cols: get the number of columns in a results set
 294  *
 295  *  @param driver - the driver
 296  *  @param res - result set.
 297  *  @return number of columns
 298  */
 299 APU_DECLARE(int) apr_dbd_num_cols(const apr_dbd_driver_t *driver,
 300                                   apr_dbd_results_t *res);
 301
 302 /** apr_dbd_num_tuples: get the number of rows in a results set
 303  *  of a synchronous select
 304  *
 305  *  @param driver - the driver
 306  *  @param res - result set.
 307  *  @return number of rows, or -1 if the results are asynchronous
 308  */
 309 APU_DECLARE(int) apr_dbd_num_tuples(const apr_dbd_driver_t *driver,
 310                                     apr_dbd_results_t *res);
 311
 312 /** apr_dbd_get_row: get a row from a result set
 313  *
 314  *  @param driver - the driver
 315  *  @param pool - pool to allocate the row
 316  *  @param res - result set pointer
 317  *  @param row - pointer to row pointer.  May point to NULL on entry
 318  *  @param rownum - row number (counting from 1), or -1 for "next row".
 319  *                  Ignored if random access is not supported.
 320  *  @return 0 for success, -1 for rownum out of range or data finished
 321  */
 322 APU_DECLARE(int) apr_dbd_get_row(const apr_dbd_driver_t *driver, apr_pool_t *pool,
 323                                  apr_dbd_results_t *res, apr_dbd_row_t **row,
 324                                  int rownum);
 325
 326 /** apr_dbd_get_entry: get an entry from a row
 327  *
 328  *  @param driver - the driver
 329  *  @param row - row pointer
 330  *  @param col - entry number
 331  *  @return value from the row, or NULL if col is out of bounds.
 332  */
 333 APU_DECLARE(const char*) apr_dbd_get_entry(const apr_dbd_driver_t *driver,
 334                                            apr_dbd_row_t *row, int col);
 335
 336 /** apr_dbd_get_name: get an entry name from a result set
 337  *
 338  *  @param driver - the driver
 339  *  @param res - result set pointer
 340  *  @param col - entry number
 341  *  @return name of the entry, or NULL if col is out of bounds.
 342  */
 343 APU_DECLARE(const char*) apr_dbd_get_name(const apr_dbd_driver_t *driver,
 344                                           apr_dbd_results_t *res, int col);
 345
 346
 347 /** apr_dbd_error: get current error message (if any)
 348  *
 349  *  @param driver - the driver
 350  *  @param handle - the connection
 351  *  @param errnum - error code from operation that returned an error
 352  *  @return the database current error message, or message for errnum
 353  *          (implementation-dependent whether errnum is ignored)
 354  */
 355 APU_DECLARE(const char*) apr_dbd_error(const apr_dbd_driver_t *driver,
 356                                        apr_dbd_t *handle, int errnum);
 357
 358 /** apr_dbd_escape: escape a string so it is safe for use in query/select
 359  *
 360  *  @param driver - the driver
 361  *  @param pool - pool to alloc the result from
 362  *  @param string - the string to escape
 363  *  @param handle - the connection
 364  *  @return the escaped, safe string
 365  */
 366 APU_DECLARE(const char*) apr_dbd_escape(const apr_dbd_driver_t *driver,
 367                                         apr_pool_t *pool, const char *string,
 368                                         apr_dbd_t *handle);
 369
 370 /** apr_dbd_prepare: prepare a statement
 371  *
 372  *  @param driver - the driver
 373  *  @param pool - pool to alloc the result from
 374  *  @param handle - the connection
 375  *  @param query - the SQL query
 376  *  @param label - A label for the prepared statement.
 377  *                 use NULL for temporary prepared statements
 378  *                 (eg within a Request in httpd)
 379  *  @param statement - statement to prepare.  May point to null on entry.
 380  *  @return 0 for success or error code
 381  *  @remarks To specify parameters of the prepared query, use \%s, \%d etc.
 382  *  (see below for full list) in place of database specific parameter syntax
 383  *  (e.g.  for PostgreSQL, this would be $1, $2, for SQLite3 this would be ?
 384  *  etc.).  For instance: "SELECT name FROM customers WHERE name=%s" would be
 385  *  a query that this function understands.
 386  *  @remarks Here is the full list of format specifiers that this function
 387  *  understands and what they map to in SQL: \%hhd (TINY INT), \%hhu (UNSIGNED
 388  *  TINY INT), \%hd (SHORT), \%hu (UNSIGNED SHORT), \%d (INT), \%u (UNSIGNED
 389  *  INT), \%ld (LONG), \%lu (UNSIGNED LONG), \%lld (LONG LONG), \%llu
 390  *  (UNSIGNED LONG LONG), \%f (FLOAT, REAL), \%lf (DOUBLE PRECISION), \%s
 391  *  (VARCHAR), \%pDt (TEXT), \%pDi (TIME), \%pDd (DATE), \%pDa (DATETIME),
 392  *  \%pDs (TIMESTAMP), \%pDz (TIMESTAMP WITH TIME ZONE), \%pDb (BLOB), \%pDc
 393  *  (CLOB) and \%pDn (NULL). Not all databases have support for all these
 394  *  types, so the underlying driver will attempt the "best match" where
 395  *  possible. A \% followed by any letter not in the above list will be
 396  *  interpreted as VARCHAR (i.e. \%s).
 397  */
 398 APU_DECLARE(int) apr_dbd_prepare(const apr_dbd_driver_t *driver, apr_pool_t *pool,
 399                                  apr_dbd_t *handle, const char *query,
 400                                  const char *label,
 401                                  apr_dbd_prepared_t **statement);
 402
 403
 404 /** apr_dbd_pquery: query using a prepared statement + args
 405  *
 406  *  @param driver - the driver
 407  *  @param pool - working pool
 408  *  @param handle - the connection
 409  *  @param nrows - number of rows affected.
 410  *  @param statement - the prepared statement to execute
 411  *  @param nargs - ignored (for backward compatibility only)
 412  *  @param args - args to prepared statement
 413  *  @return 0 for success or error code
 414  */
 415 APU_DECLARE(int) apr_dbd_pquery(const apr_dbd_driver_t *driver, apr_pool_t *pool,
 416                                 apr_dbd_t *handle, int *nrows,
 417                                 apr_dbd_prepared_t *statement, int nargs,
 418                                 const char **args);
 419
 420 /** apr_dbd_pselect: select using a prepared statement + args
 421  *
 422  *  @param driver - the driver
 423  *  @param pool - working pool
 424  *  @param handle - the connection
 425  *  @param res - pointer to query results.  May point to NULL on entry
 426  *  @param statement - the prepared statement to execute
 427  *  @param random - Whether to support random-access to results
 428  *  @param nargs - ignored (for backward compatibility only)
 429  *  @param args - args to prepared statement
 430  *  @return 0 for success or error code
 431  */
 432 APU_DECLARE(int) apr_dbd_pselect(const apr_dbd_driver_t *driver, apr_pool_t *pool,
 433                                  apr_dbd_t *handle, apr_dbd_results_t **res,
 434                                  apr_dbd_prepared_t *statement, int random,
 435                                  int nargs, const char **args);
 436
 437 /** apr_dbd_pvquery: query using a prepared statement + args
 438  *
 439  *  @param driver - the driver
 440  *  @param pool - working pool
 441  *  @param handle - the connection
 442  *  @param nrows - number of rows affected.
 443  *  @param statement - the prepared statement to execute
 444  *  @param ... - varargs list
 445  *  @return 0 for success or error code
 446  */
 447 APU_DECLARE_NONSTD(int) apr_dbd_pvquery(const apr_dbd_driver_t *driver,
 448                                         apr_pool_t *pool,
 449                                         apr_dbd_t *handle, int *nrows,
 450                                         apr_dbd_prepared_t *statement, ...);
 451
 452 /** apr_dbd_pvselect: select using a prepared statement + args
 453  *
 454  *  @param driver - the driver
 455  *  @param pool - working pool
 456  *  @param handle - the connection
 457  *  @param res - pointer to query results.  May point to NULL on entry
 458  *  @param statement - the prepared statement to execute
 459  *  @param random - Whether to support random-access to results
 460  *  @param ... - varargs list
 461  *  @return 0 for success or error code
 462  */
 463 APU_DECLARE_NONSTD(int) apr_dbd_pvselect(const apr_dbd_driver_t *driver,
 464                                          apr_pool_t *pool, apr_dbd_t *handle,
 465                                          apr_dbd_results_t **res,
 466                                          apr_dbd_prepared_t *statement,
 467                                          int random, ...);
 468
 469 /** apr_dbd_pbquery: query using a prepared statement + binary args
 470  *
 471  *  @param driver - the driver
 472  *  @param pool - working pool
 473  *  @param handle - the connection
 474  *  @param nrows - number of rows affected.
 475  *  @param statement - the prepared statement to execute
 476  *  @param args - binary args to prepared statement
 477  *  @return 0 for success or error code
 478  */
 479 APU_DECLARE(int) apr_dbd_pbquery(const apr_dbd_driver_t *driver,
 480                                  apr_pool_t *pool, apr_dbd_t *handle,
 481                                  int *nrows, apr_dbd_prepared_t *statement,
 482                                  const void **args);
 483
 484 /** apr_dbd_pbselect: select using a prepared statement + binary args
 485  *
 486  *  @param driver - the driver
 487  *  @param pool - working pool
 488  *  @param handle - the connection
 489  *  @param res - pointer to query results.  May point to NULL on entry
 490  *  @param statement - the prepared statement to execute
 491  *  @param random - Whether to support random-access to results
 492  *  @param args - binary args to prepared statement
 493  *  @return 0 for success or error code
 494  */
 495 APU_DECLARE(int) apr_dbd_pbselect(const apr_dbd_driver_t *driver,
 496                                   apr_pool_t *pool,
 497                                   apr_dbd_t *handle, apr_dbd_results_t **res,
 498                                   apr_dbd_prepared_t *statement, int random,
 499                                   const void **args);
 500
 501 /** apr_dbd_pvbquery: query using a prepared statement + binary args
 502  *
 503  *  @param driver - the driver
 504  *  @param pool - working pool
 505  *  @param handle - the connection
 506  *  @param nrows - number of rows affected.
 507  *  @param statement - the prepared statement to execute
 508  *  @param ... - varargs list of binary args
 509  *  @return 0 for success or error code
 510  */
 511 APU_DECLARE_NONSTD(int) apr_dbd_pvbquery(const apr_dbd_driver_t *driver,
 512                                          apr_pool_t *pool,
 513                                          apr_dbd_t *handle, int *nrows,
 514                                          apr_dbd_prepared_t *statement, ...);
 515
 516 /** apr_dbd_pvbselect: select using a prepared statement + binary args
 517  *
 518  *  @param driver - the driver
 519  *  @param pool - working pool
 520  *  @param handle - the connection
 521  *  @param res - pointer to query results.  May point to NULL on entry
 522  *  @param statement - the prepared statement to execute
 523  *  @param random - Whether to support random-access to results
 524  *  @param ... - varargs list of binary args
 525  *  @return 0 for success or error code
 526  */
 527 APU_DECLARE_NONSTD(int) apr_dbd_pvbselect(const apr_dbd_driver_t *driver,
 528                                           apr_pool_t *pool, apr_dbd_t *handle,
 529                                           apr_dbd_results_t **res,
 530                                           apr_dbd_prepared_t *statement,
 531                                           int random, ...);
 532
 533 /** apr_dbd_datum_get: get a binary entry from a row
 534  *
 535  *  @param driver - the driver
 536  *  @param row - row pointer
 537  *  @param col - entry number
 538  *  @param type - type of data to get
 539  *  @param data - pointer to data, allocated by the caller
 540  *  @return APR_SUCCESS on success, APR_ENOENT if data is NULL or APR_EGENERAL
 541  */
 542 APU_DECLARE(apr_status_t) apr_dbd_datum_get(const apr_dbd_driver_t *driver,
 543                                             apr_dbd_row_t *row, int col,
 544                                             apr_dbd_type_e type, void *data);
 545
 546 /** @} */
 547
 548 #ifdef __cplusplus
 549 }
 550 #endif
 551
 552 #endif