Mercurial > dovecot > original-hg > dovecot-1.2
view src/lib-sql/driver-pgsql.c @ 9287:d7251058200c HEAD
maildir+deliver: Add all existing messages to uidlist if it doesn't exist yet.
author | Timo Sirainen <tss@iki.fi> |
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date | Fri, 07 Aug 2009 13:24:13 -0400 |
parents | 7ccc533e30bb |
children | 4530228c8993 |
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/* Copyright (c) 2004-2009 Dovecot authors, see the included COPYING file */ #include "lib.h" #include "array.h" #include "ioloop.h" #include "ioloop-internal.h" /* kind of dirty, but it should be fine.. */ #include "sql-api-private.h" #ifdef BUILD_PGSQL #include <stdlib.h> #include <time.h> #include <libpq-fe.h> #define QUERY_TIMEOUT_SECS 6 struct pgsql_db { struct sql_db api; pool_t pool; char *connect_string; PGconn *pg; struct io *io; enum io_condition io_dir; struct pgsql_queue *queue, **queue_tail; struct timeout *queue_to; struct ioloop *ioloop; struct sql_result *sync_result; char *error; time_t last_connect; unsigned int connecting:1; unsigned int connected:1; unsigned int querying:1; unsigned int query_finished:1; }; struct pgsql_binary_value { unsigned char *value; size_t size; }; struct pgsql_result { struct sql_result api; PGresult *pgres; char *query; unsigned int rownum, rows; unsigned int fields_count; const char **fields; const char **values; ARRAY_DEFINE(binary_values, struct pgsql_binary_value); sql_query_callback_t *callback; void *context; unsigned int retry_query:1; }; struct pgsql_queue { struct pgsql_queue *next; time_t created; char *query; struct pgsql_result *result; }; struct pgsql_transaction_context { struct sql_transaction_context ctx; int refcount; sql_commit_callback_t *callback; void *context; pool_t query_pool; struct pgsql_query_list *head, *tail; const char *error; unsigned int begin_succeeded:1; unsigned int begin_failed:1; unsigned int failed:1; }; struct pgsql_query_list { struct pgsql_query_list *next; const char *query; }; extern struct sql_db driver_pgsql_db; extern struct sql_result driver_pgsql_result; static void transaction_update_callback(struct sql_result *result, void *context); static void driver_pgsql_query_full(struct sql_db *db, const char *query, sql_query_callback_t *callback, void *context, bool retry_query); static void queue_send_next(struct pgsql_db *db); static void result_finish(struct pgsql_result *result); static void driver_pgsql_close(struct pgsql_db *db) { db->io_dir = 0; PQfinish(db->pg); db->pg = NULL; if (db->io != NULL) { /* The fd may be closed before call to PQfinish() already, so use io_remove_closed(). */ io_remove_closed(&db->io); } db->connecting = FALSE; db->connected = FALSE; db->querying = FALSE; } static const char *last_error(struct pgsql_db *db) { const char *msg; size_t len; msg = PQerrorMessage(db->pg); if (msg == NULL) return "(no error set)"; /* Error message should contain trailing \n, we don't want it */ len = strlen(msg); return len == 0 || msg[len-1] != '\n' ? msg : t_strndup(msg, len-1); } static void connect_callback(struct pgsql_db *db) { enum io_condition io_dir = 0; int ret; while ((ret = PQconnectPoll(db->pg)) == PGRES_POLLING_ACTIVE) ; switch (ret) { case PGRES_POLLING_READING: io_dir = IO_READ; break; case PGRES_POLLING_WRITING: io_dir = IO_WRITE; break; case PGRES_POLLING_OK: i_info("pgsql: Connected to %s", PQdb(db->pg)); db->connecting = FALSE; db->connected = TRUE; break; case PGRES_POLLING_FAILED: i_error("pgsql: Connect failed to %s: %s", PQdb(db->pg), last_error(db)); driver_pgsql_close(db); return; } if (db->io_dir != io_dir) { if (db->io != NULL) io_remove(&db->io); db->io = io_dir == 0 ? NULL : io_add(PQsocket(db->pg), io_dir, connect_callback, db); db->io_dir = io_dir; } if (db->connected && db->queue != NULL) queue_send_next(db); } static int driver_pgsql_connect(struct sql_db *_db) { struct pgsql_db *db = (struct pgsql_db *)_db; time_t now; /* don't try reconnecting more than once a second */ now = time(NULL); if (db->connecting || db->last_connect == now) return db->connected ? 1 : (db->connecting ? 0 : -1); db->last_connect = now; db->pg = PQconnectStart(db->connect_string); if (db->pg == NULL) i_fatal("pgsql: PQconnectStart() failed (out of memory)"); if (PQstatus(db->pg) == CONNECTION_BAD) { i_error("pgsql: Connect failed to %s: %s", PQdb(db->pg), last_error(db)); driver_pgsql_close(db); return -1; } else { /* nonblocking connecting begins. */ if (PQsetnonblocking(db->pg, 1) < 0) i_error("pgsql: PQsetnonblocking() failed"); db->io = io_add(PQsocket(db->pg), IO_WRITE, connect_callback, db); db->io_dir = IO_WRITE; db->connecting = TRUE; return 0; } } static struct sql_db *driver_pgsql_init_v(const char *connect_string) { struct pgsql_db *db; i_assert(connect_string != NULL); db = i_new(struct pgsql_db, 1); db->connect_string = i_strdup(connect_string); db->api = driver_pgsql_db; db->queue_tail = &db->queue; return &db->api; } static void driver_pgsql_deinit_v(struct sql_db *_db) { struct pgsql_db *db = (struct pgsql_db *)_db; while (db->queue != NULL) { struct pgsql_queue *next = db->queue->next; result_finish(db->queue->result); i_free(db->queue->query); i_free(db->queue); db->queue = next; } if (db->queue_to != NULL) timeout_remove(&db->queue_to); driver_pgsql_close(db); i_free(db->error); i_free(db->connect_string); array_free(&_db->module_contexts); i_free(db); } static enum sql_db_flags driver_pgsql_get_flags(struct sql_db *db ATTR_UNUSED) { return 0; } static void consume_results(struct pgsql_db *db) { do { if (!PQconsumeInput(db->pg)) break; if (PQisBusy(db->pg)) return; } while (PQgetResult(db->pg) != NULL); if (PQstatus(db->pg) == CONNECTION_BAD) io_remove_closed(&db->io); else io_remove(&db->io); db->querying = FALSE; if (db->queue != NULL && db->connected) queue_send_next(db); } static void driver_pgsql_result_free(struct sql_result *_result) { struct pgsql_db *db = (struct pgsql_db *)_result->db; struct pgsql_result *result = (struct pgsql_result *)_result; if (result->api.callback) return; if (_result == db->sync_result) db->sync_result = NULL; if (result->pgres != NULL) { PQclear(result->pgres); /* we'll have to read the rest of the results as well */ i_assert(db->io == NULL); db->io = io_add(PQsocket(db->pg), IO_READ, consume_results, db); db->io_dir = IO_READ; consume_results(db); } else { db->querying = FALSE; } if (array_is_created(&result->binary_values)) { struct pgsql_binary_value *values; unsigned int i, count; values = array_get_modifiable(&result->binary_values, &count); for (i = 0; i < count; i++) PQfreemem(values[i].value); array_free(&result->binary_values); } i_free(result->fields); i_free(result->values); i_free(result->query); i_free(result); if (db->queue != NULL && !db->querying && db->connected) queue_send_next(db); } static void result_finish(struct pgsql_result *result) { struct pgsql_db *db = (struct pgsql_db *)result->api.db; bool free_result = TRUE, retry = FALSE; bool disconnected; /* if connection to server was lost, we don't yet see that the connection is bad. we only see the fatal error, so assume it also means disconnection. */ disconnected = PQstatus(db->pg) == CONNECTION_BAD || PQresultStatus(result->pgres) == PGRES_FATAL_ERROR; if (disconnected && result->retry_query) { /* retry the query */ i_error("pgsql: Query failed, retrying: %s", last_error(db)); retry = TRUE; } else if (result->callback != NULL) { result->api.callback = TRUE; T_BEGIN { result->callback(&result->api, result->context); } T_END; result->api.callback = FALSE; free_result = db->sync_result != &result->api; if (db->queue == NULL && db->ioloop != NULL) io_loop_stop(db->ioloop); } if (disconnected) { /* disconnected */ if (result->pgres != NULL) { PQclear(result->pgres); result->pgres = NULL; } driver_pgsql_close(db); if (retry) { /* retry the query */ driver_pgsql_query_full(&db->api, result->query, result->callback, result->context, FALSE); } } if (free_result) driver_pgsql_result_free(&result->api); } static void get_result(struct pgsql_result *result) { struct pgsql_db *db = (struct pgsql_db *)result->api.db; if (!PQconsumeInput(db->pg)) { db->connected = FALSE; result_finish(result); return; } if (PQisBusy(db->pg)) { if (db->io == NULL) { db->io = io_add(PQsocket(db->pg), IO_READ, get_result, result); db->io_dir = IO_READ; } return; } if (db->io != NULL) io_remove(&db->io); result->pgres = PQgetResult(db->pg); result_finish(result); } static void flush_callback(struct pgsql_result *result) { struct pgsql_db *db = (struct pgsql_db *)result->api.db; int ret; ret = PQflush(db->pg); if (ret > 0) return; io_remove(&db->io); if (ret < 0) { db->connected = FALSE; result_finish(result); } else { /* all flushed */ get_result(result); } } static void send_query(struct pgsql_result *result, const char *query) { struct pgsql_db *db = (struct pgsql_db *)result->api.db; int ret; i_assert(db->io == NULL); i_assert(!db->querying); i_assert(db->connected); if (!PQsendQuery(db->pg, query)) { db->connected = FALSE; result_finish(result); return; } ret = PQflush(db->pg); if (ret < 0) { db->connected = FALSE; result_finish(result); return; } db->querying = TRUE; if (ret > 0) { /* write blocks */ db->io = io_add(PQsocket(db->pg), IO_WRITE, flush_callback, result); db->io_dir = IO_WRITE; } else { get_result(result); } } static struct pgsql_queue *queue_unlink_first(struct pgsql_db *db) { struct pgsql_queue *queue; queue = db->queue; db->queue = queue->next; if (db->queue == NULL) db->queue_tail = &db->queue; return queue; } static void queue_send_next(struct pgsql_db *db) { struct pgsql_queue *queue; queue = queue_unlink_first(db); send_query(queue->result, queue->query); i_free(queue->query); i_free(queue); } static void queue_abort_next(struct pgsql_db *db) { struct pgsql_queue *queue; queue = queue_unlink_first(db); queue->result->callback(&sql_not_connected_result, queue->result->context); i_free(queue->result); i_free(queue->query); i_free(queue); if (db->queue == NULL && db->ioloop != NULL) io_loop_stop(db->ioloop); } static void queue_drop_timed_out_queries(struct pgsql_db *db) { while (db->queue != NULL && db->queue->created + QUERY_TIMEOUT_SECS < ioloop_time) queue_abort_next(db); } static void queue_timeout(struct pgsql_db *db) { if (db->querying) return; if (!db->connected) { queue_drop_timed_out_queries(db); driver_pgsql_connect(&db->api); return; } if (db->queue != NULL) queue_send_next(db); if (db->queue == NULL) timeout_remove(&db->queue_to); } static void driver_pgsql_queue_query(struct pgsql_result *result, const char *query) { struct pgsql_db *db = (struct pgsql_db *)result->api.db; struct pgsql_queue *queue; queue = i_new(struct pgsql_queue, 1); queue->created = time(NULL); queue->query = i_strdup(query); queue->result = result; *db->queue_tail = queue; db->queue_tail = &queue->next; if (db->queue_to == NULL) db->queue_to = timeout_add(5000, queue_timeout, db); } static void do_query(struct pgsql_result *result, const char *query) { struct pgsql_db *db = (struct pgsql_db *)result->api.db; i_assert(db->sync_result == NULL); if (db->querying) { /* only one query at a time */ driver_pgsql_queue_query(result, query); return; } if (!db->connected) { /* try connecting again */ driver_pgsql_connect(&db->api); driver_pgsql_queue_query(result, query); return; } if (db->queue == NULL) send_query(result, query); else { /* there's already queries queued, send them first */ driver_pgsql_queue_query(result, query); queue_send_next(db); } } static void exec_callback(struct sql_result *_result, void *context ATTR_UNUSED) { struct pgsql_db *db = (struct pgsql_db *)_result->db; i_error("pgsql: sql_exec() failed: %s", last_error(db)); } static const char * driver_pgsql_escape_string(struct sql_db *_db, const char *string) { struct pgsql_db *db = (struct pgsql_db *)_db; size_t len = strlen(string); char *to; #ifdef HAVE_PQESCAPE_STRING_CONN if (!db->connected) { /* try connecting again */ (void)driver_pgsql_connect(&db->api); } to = t_buffer_get(len * 2 + 1); len = PQescapeStringConn(db->pg, to, string, len, NULL); #else to = t_buffer_get(len * 2 + 1); len = PQescapeString(to, string, len); #endif t_buffer_alloc(len + 1); return to; } static void driver_pgsql_exec_full(struct sql_db *db, const char *query, bool retry_query) { struct pgsql_result *result; result = i_new(struct pgsql_result, 1); result->api = driver_pgsql_result; result->api.db = db; result->callback = exec_callback; if (retry_query) { result->query = i_strdup(query); result->retry_query = TRUE; } do_query(result, query); } static void driver_pgsql_exec(struct sql_db *db, const char *query) { driver_pgsql_exec_full(db, query, TRUE); } static void driver_pgsql_query_full(struct sql_db *db, const char *query, sql_query_callback_t *callback, void *context, bool retry_query) { struct pgsql_result *result; result = i_new(struct pgsql_result, 1); result->api = driver_pgsql_result; result->api.db = db; result->callback = callback; result->context = context; if (retry_query) { result->query = i_strdup(query); result->retry_query = TRUE; } do_query(result, query); } static void driver_pgsql_query(struct sql_db *db, const char *query, sql_query_callback_t *callback, void *context) { driver_pgsql_query_full(db, query, callback, context, TRUE); } static void pgsql_query_s_callback(struct sql_result *result, void *context) { struct pgsql_db *db = context; db->query_finished = TRUE; db->sync_result = result; } static struct sql_result * driver_pgsql_query_s(struct sql_db *_db, const char *query) { struct pgsql_db *db = (struct pgsql_db *)_db; struct sql_result *result; struct io old_io; if (db->queue_to != NULL) { /* we're creating a new ioloop, make sure the timeout gets added there. */ timeout_remove(&db->queue_to); } if (db->io == NULL) db->ioloop = io_loop_create(); else { /* have to move our existing I/O handler to new I/O loop */ old_io = *db->io; io_remove(&db->io); db->ioloop = io_loop_create(); db->io = io_add(PQsocket(db->pg), old_io.condition, old_io.callback, old_io.context); } db->query_finished = FALSE; if (query != NULL) driver_pgsql_query(_db, query, pgsql_query_s_callback, db); if (!db->query_finished) { if ((db->connected || db->connecting) && db->io != NULL) io_loop_run(db->ioloop); else queue_abort_next(db); if (db->io != NULL) { i_assert(db->sync_result == &sql_not_connected_result); io_remove(&db->io); } if (db->queue_to != NULL) timeout_remove(&db->queue_to); } else { i_assert(db->io == NULL); i_assert(db->queue_to == NULL); } io_loop_destroy(&db->ioloop); result = db->sync_result; if (result == &sql_not_connected_result) { /* we don't end up in pgsql's free function, so sync_result won't be set to NULL if we don't do it here. */ db->sync_result = NULL; } i_assert(db->io == NULL); return result; } static int driver_pgsql_result_next_row(struct sql_result *_result) { struct pgsql_result *result = (struct pgsql_result *)_result; struct pgsql_db *db = (struct pgsql_db *)_result->db; if (result->rows != 0) { /* second time we're here */ return ++result->rownum < result->rows; } if (result->pgres == NULL) return -1; switch (PQresultStatus(result->pgres)) { case PGRES_COMMAND_OK: /* no rows returned */ return 0; case PGRES_TUPLES_OK: result->rows = PQntuples(result->pgres); return result->rows > 0; case PGRES_EMPTY_QUERY: case PGRES_NONFATAL_ERROR: /* nonfatal error */ return -1; default: /* treat as fatal error */ db->connected = FALSE; return -1; } } static void driver_pgsql_result_fetch_fields(struct pgsql_result *result) { unsigned int i; if (result->fields != NULL) return; /* @UNSAFE */ result->fields_count = PQnfields(result->pgres); result->fields = i_new(const char *, result->fields_count); for (i = 0; i < result->fields_count; i++) result->fields[i] = PQfname(result->pgres, i); } static unsigned int driver_pgsql_result_get_fields_count(struct sql_result *_result) { struct pgsql_result *result = (struct pgsql_result *)_result; driver_pgsql_result_fetch_fields(result); return result->fields_count; } static const char * driver_pgsql_result_get_field_name(struct sql_result *_result, unsigned int idx) { struct pgsql_result *result = (struct pgsql_result *)_result; driver_pgsql_result_fetch_fields(result); i_assert(idx < result->fields_count); return result->fields[idx]; } static int driver_pgsql_result_find_field(struct sql_result *_result, const char *field_name) { struct pgsql_result *result = (struct pgsql_result *)_result; unsigned int i; driver_pgsql_result_fetch_fields(result); for (i = 0; i < result->fields_count; i++) { if (strcmp(result->fields[i], field_name) == 0) return i; } return -1; } static const char * driver_pgsql_result_get_field_value(struct sql_result *_result, unsigned int idx) { struct pgsql_result *result = (struct pgsql_result *)_result; if (PQgetisnull(result->pgres, result->rownum, idx)) return NULL; return PQgetvalue(result->pgres, result->rownum, idx); } static const unsigned char * driver_pgsql_result_get_field_value_binary(struct sql_result *_result, unsigned int idx, size_t *size_r) { struct pgsql_result *result = (struct pgsql_result *)_result; const char *value; struct pgsql_binary_value *binary_value; if (PQgetisnull(result->pgres, result->rownum, idx)) { *size_r = 0; return NULL; } value = PQgetvalue(result->pgres, result->rownum, idx); if (!array_is_created(&result->binary_values)) i_array_init(&result->binary_values, idx + 1); binary_value = array_idx_modifiable(&result->binary_values, idx); if (binary_value->value == NULL) { binary_value->value = PQunescapeBytea((const unsigned char *)value, &binary_value->size); } *size_r = binary_value->size; return binary_value->value; } static const char * driver_pgsql_result_find_field_value(struct sql_result *result, const char *field_name) { int idx; idx = driver_pgsql_result_find_field(result, field_name); if (idx < 0) return NULL; return driver_pgsql_result_get_field_value(result, idx); } static const char *const * driver_pgsql_result_get_values(struct sql_result *_result) { struct pgsql_result *result = (struct pgsql_result *)_result; unsigned int i; if (result->values == NULL) { driver_pgsql_result_fetch_fields(result); result->values = i_new(const char *, result->fields_count); } /* @UNSAFE */ for (i = 0; i < result->fields_count; i++) { result->values[i] = driver_pgsql_result_get_field_value(_result, i); } return result->values; } static const char *driver_pgsql_result_get_error(struct sql_result *_result) { struct pgsql_result *result = (struct pgsql_result *)_result; struct pgsql_db *db = (struct pgsql_db *)_result->db; const char *msg; size_t len; i_free_and_null(db->error); if (result->pgres == NULL) { /* connection error */ db->error = i_strdup(last_error(db)); } else { msg = PQresultErrorMessage(result->pgres); if (msg == NULL) return "(no error set)"; /* Error message should contain trailing \n, we don't want it */ len = strlen(msg); db->error = len == 0 || msg[len-1] != '\n' ? i_strdup(msg) : i_strndup(msg, len-1); } return db->error; } static struct sql_transaction_context * driver_pgsql_transaction_begin(struct sql_db *db) { struct pgsql_transaction_context *ctx; ctx = i_new(struct pgsql_transaction_context, 1); ctx->ctx.db = db; ctx->refcount = 1; /* we need to be able to handle multiple open transactions, so at least for now just keep them in memory until commit time. */ ctx->query_pool = pool_alloconly_create("pgsql transaction", 1024); return &ctx->ctx; } static void driver_pgsql_transaction_unref(struct pgsql_transaction_context *ctx) { i_assert(ctx->refcount > 0); if (--ctx->refcount > 0) return; pool_unref(&ctx->query_pool); i_free(ctx); } static void transaction_commit_callback(struct sql_result *result, void *context) { struct pgsql_transaction_context *ctx = (struct pgsql_transaction_context *)context; if (sql_result_next_row(result) < 0) ctx->callback(sql_result_get_error(result), ctx->context); else ctx->callback(NULL, ctx->context); driver_pgsql_transaction_unref(ctx); } static void transaction_update_callback(struct sql_result *result, void *context) { struct pgsql_transaction_context *ctx = context; if (sql_result_next_row(result) < 0) { if (!ctx->begin_succeeded) ctx->begin_failed = TRUE; ctx->failed = TRUE; ctx->error = sql_result_get_error(result); } else { ctx->begin_succeeded = TRUE; } driver_pgsql_transaction_unref(ctx); } static void driver_pgsql_transaction_commit(struct sql_transaction_context *_ctx, sql_commit_callback_t *callback, void *context) { struct pgsql_transaction_context *ctx = (struct pgsql_transaction_context *)_ctx; ctx->callback = callback; ctx->context = context; if (ctx->failed || ctx->head == NULL) { callback(ctx->failed ? ctx->error : NULL, context); driver_pgsql_transaction_unref(ctx); } else if (ctx->head->next == NULL) { /* just a single query, send it */ sql_query(_ctx->db, ctx->head->query, transaction_commit_callback, ctx); } else { /* multiple queries, use a transaction */ ctx->refcount++; sql_query(_ctx->db, "BEGIN", transaction_update_callback, ctx); while (ctx->head != NULL) { ctx->refcount++; sql_query(_ctx->db, ctx->head->query, transaction_update_callback, ctx); ctx->head = ctx->head->next; } sql_query(_ctx->db, "COMMIT", transaction_commit_callback, ctx); } } static int driver_pgsql_transaction_commit_s(struct sql_transaction_context *_ctx, const char **error_r) { struct pgsql_transaction_context *ctx = (struct pgsql_transaction_context *)_ctx; struct sql_result *result; *error_r = NULL; if (ctx->failed || ctx->head == NULL) { /* nothing to be done */ result = NULL; } else if (ctx->head->next == NULL) { /* just a single query, send it */ result = sql_query_s(_ctx->db, ctx->head->query); } else { /* multiple queries, use a transaction */ ctx->refcount++; sql_query(_ctx->db, "BEGIN", transaction_update_callback, ctx); while (ctx->head != NULL) { ctx->refcount++; sql_query(_ctx->db, ctx->head->query, transaction_update_callback, ctx); ctx->head = ctx->head->next; } if (ctx->refcount > 1) { /* flush the previous queries */ (void)driver_pgsql_query_s(_ctx->db, NULL); } if (ctx->begin_failed) { result = NULL; } else if (ctx->failed) { result = sql_query_s(_ctx->db, "ROLLBACK"); } else { result = sql_query_s(_ctx->db, "COMMIT"); } } if (ctx->failed) *error_r = ctx->error; else if (result != NULL) { if (sql_result_next_row(result) < 0) *error_r = sql_result_get_error(result); } if (result != NULL) sql_result_free(result); i_assert(ctx->refcount == 1); driver_pgsql_transaction_unref(ctx); return *error_r == NULL ? 0 : -1; } static void driver_pgsql_transaction_rollback(struct sql_transaction_context *_ctx) { struct pgsql_transaction_context *ctx = (struct pgsql_transaction_context *)_ctx; i_assert(ctx->refcount == 1); driver_pgsql_transaction_unref(ctx); } static void driver_pgsql_update(struct sql_transaction_context *_ctx, const char *query) { struct pgsql_transaction_context *ctx = (struct pgsql_transaction_context *)_ctx; struct pgsql_query_list *list; list = p_new(ctx->query_pool, struct pgsql_query_list, 1); list->query = p_strdup(ctx->query_pool, query); if (ctx->head == NULL) ctx->head = list; else ctx->tail->next = list; ctx->tail = list; } struct sql_db driver_pgsql_db = { "pgsql", MEMBER(v) { driver_pgsql_init_v, driver_pgsql_deinit_v, driver_pgsql_get_flags, driver_pgsql_connect, driver_pgsql_escape_string, driver_pgsql_exec, driver_pgsql_query, driver_pgsql_query_s, driver_pgsql_transaction_begin, driver_pgsql_transaction_commit, driver_pgsql_transaction_commit_s, driver_pgsql_transaction_rollback, driver_pgsql_update } }; struct sql_result driver_pgsql_result = { MEMBER(v) { driver_pgsql_result_free, driver_pgsql_result_next_row, driver_pgsql_result_get_fields_count, driver_pgsql_result_get_field_name, driver_pgsql_result_find_field, driver_pgsql_result_get_field_value, driver_pgsql_result_get_field_value_binary, driver_pgsql_result_find_field_value, driver_pgsql_result_get_values, driver_pgsql_result_get_error } }; void driver_pgsql_init(void); void driver_pgsql_deinit(void); void driver_pgsql_init(void) { sql_driver_register(&driver_pgsql_db); } void driver_pgsql_deinit(void) { sql_driver_unregister(&driver_pgsql_db); } #endif