* Bacula Catalog Database routines specific to PostgreSQL
* These are PostgreSQL specific routines
*
- * Dan Langille, December 2004
+ * Dan Langille, December 2003
* based upon work done by Kern Sibbald, March 2000
*
* Version $Id$
*/
/*
- Copyright (C) 2000-2003 Kern Sibbald and John Walker
+ Copyright (C) 2000-2004 Kern Sibbald and John Walker
This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License as
#ifdef HAVE_POSTGRESQL
+#include "postgres_ext.h" /* needed for NAMEDATALEN */
+
/* -----------------------------------------------------------------------
*
* PostgreSQL dependent defines and subroutines
}
mdb->db_port = db_port;
mdb->have_insert_id = TRUE;
- mdb->errmsg = get_pool_memory(PM_EMSG); /* get error message buffer */
+ mdb->errmsg = get_pool_memory(PM_EMSG); /* get error message buffer */
*mdb->errmsg = 0;
- mdb->cmd = get_pool_memory(PM_EMSG); /* get command buffer */
+ mdb->cmd = get_pool_memory(PM_EMSG); /* get command buffer */
mdb->cached_path = get_pool_memory(PM_FNAME);
mdb->cached_path_id = 0;
mdb->ref_count = 1;
- mdb->fname = get_pool_memory(PM_FNAME);
- mdb->path = get_pool_memory(PM_FNAME);
+ mdb->fname = get_pool_memory(PM_FNAME);
+ mdb->path = get_pool_memory(PM_FNAME);
mdb->esc_name = get_pool_memory(PM_FNAME);
qinsert(&db_list, &mdb->bq); /* put db in list */
V(mutex);
/*
* Now actually open the database. This can generate errors,
- * which are returned in the errmsg
+ * which are returned in the errmsg
+ *
+ * DO NOT close the database or free(mdb) here !!!!
*/
int
db_open_database(JCR *jcr, B_DB *mdb)
mdb->db = PQsetdbLogin(
mdb->db_address, /* default = localhost */
(char *) mdb->db_port, /* default port */
- NULL, /* pg options */
- NULL, /* tty, ignored */
+ NULL, /* pg options */
+ NULL, /* tty, ignored */
mdb->db_name, /* database name */
mdb->db_user, /* login name */
mdb->db_password); /* password */
mdb->db = PQsetdbLogin(
mdb->db_address, /* default = localhost */
(char *) mdb->db_port, /* default port */
- NULL, /* pg options */
- NULL, /* tty, ignored */
+ NULL, /* pg options */
+ NULL, /* tty, ignored */
mdb->db_name, /* database name */
mdb->db_user, /* login name */
mdb->db_password); /* password */
Mmsg2(&mdb->errmsg, _("Unable to connect to PostgreSQL server.\n"
"Database=%s User=%s\n"
"It is probably not running or your password is incorrect.\n"),
- mdb->db_name, mdb->db_user);
+ mdb->db_name, mdb->db_user);
V(mutex);
return 0;
}
if (!check_tables_version(jcr, mdb)) {
V(mutex);
- db_close_database(jcr, mdb);
return 0;
}
void
db_close_database(JCR *jcr, B_DB *mdb)
{
+ if (!mdb) {
+ return;
+ }
P(mutex);
mdb->ref_count--;
if (mdb->ref_count == 0) {
qdchain(&mdb->bq);
if (mdb->connected && mdb->db) {
- sql_close(mdb);
+ sql_close(mdb);
}
rwl_destroy(&mdb->lock);
free_pool_memory(mdb->errmsg);
free_pool_memory(mdb->path);
free_pool_memory(mdb->esc_name);
if (mdb->db_name) {
- free(mdb->db_name);
+ free(mdb->db_name);
}
if (mdb->db_user) {
- free(mdb->db_user);
+ free(mdb->db_user);
}
if (mdb->db_password) {
- free(mdb->db_password);
+ free(mdb->db_password);
}
if (mdb->db_address) {
- free(mdb->db_address);
+ free(mdb->db_address);
}
if (mdb->db_socket) {
- free(mdb->db_socket);
+ free(mdb->db_socket);
}
free(mdb);
}
* Return the next unique index (auto-increment) for
* the given table. Return NULL on error.
*
- * For MySQL, NULL causes the auto-increment value
+ * For PostgreSQL, NULL causes the auto-increment value
* to be updated.
*/
int db_next_index(JCR *jcr, B_DB *mdb, char *table, char *index)
int db_sql_query(B_DB *mdb, char *query, DB_RESULT_HANDLER *result_handler, void *ctx)
{
SQL_ROW row;
- int numrows;
Dmsg0(50, "db_sql_query started\n");
if (result_handler != NULL) {
Dmsg0(50, "db_sql_query invoking handler\n");
if ((mdb->result = sql_store_result(mdb)) != NULL) {
- int num_fields = sql_num_fields(mdb);
+ int num_fields = sql_num_fields(mdb);
Dmsg0(50, "db_sql_query sql_store_result suceeded\n");
- while ((row = sql_fetch_row(mdb)) != NULL) {
+ while ((row = sql_fetch_row(mdb)) != NULL) {
Dmsg0(50, "db_sql_query sql_fetch_row worked\n");
- if (result_handler(ctx, num_fields, row))
- break;
- }
+ if (result_handler(ctx, num_fields, row))
+ break;
+ }
- sql_free_result(mdb);
+ sql_free_result(mdb);
}
}
db_unlock(mdb);
}
-static void
-list_dashes(B_DB *mdb, DB_LIST_HANDLER *send, void *ctx)
-{
- SQL_FIELD *field;
- unsigned int i, j;
-
- sql_field_seek(mdb, 0);
- send(ctx, "+");
- for (i = 0; i < sql_num_fields(mdb); i++) {
- field = sql_fetch_field(mdb);
- for (j = 0; j < field->max_length + 2; j++)
- send(ctx, "-");
- send(ctx, "+");
- }
- send(ctx, "\n");
-}
-/*
- * If full_list is set, we list vertically, otherwise, we
- * list on one line horizontally.
- */
-void
-list_result(B_DB *mdb, DB_LIST_HANDLER *send, void *ctx, e_list_type type)
+POSTGRESQL_ROW my_postgresql_fetch_row(B_DB *mdb)
{
- SQL_FIELD *field;
- SQL_ROW row;
- unsigned int i, col_len, max_len = 0;
- char buf[2000], ewc[30];
+ int j;
+ POSTGRESQL_ROW row = NULL; // by default, return NULL
- if (mdb->result == NULL) {
- send(ctx, _("No results to list.\n"));
- return;
- }
- /* determine column display widths */
- sql_field_seek(mdb, 0);
- for (i = 0; i < sql_num_fields(mdb); i++) {
- field = sql_fetch_field(mdb);
- col_len = strlen(field->name);
- if (type == VERT_LIST) {
- if (col_len > max_len) {
- max_len = col_len;
- }
- } else {
- if (IS_NUM(field->type) && field->max_length > 0) { /* fixup for commas */
- field->max_length += (field->max_length - 1) / 3;
- }
- if (col_len < field->max_length) {
- col_len = field->max_length;
- }
- if (col_len < 4 && !IS_NOT_NULL(field->flags)) {
- col_len = 4; /* 4 = length of the word "NULL" */
- }
- field->max_length = col_len; /* reset column info */
- }
- }
+ Dmsg0(50, "my_postgresql_fetch_row start\n");
- if (type == VERT_LIST) {
- goto vertical_list;
- }
+ if (mdb->row_number == -1 || mdb->row == NULL) {
- list_dashes(mdb, send, ctx);
- send(ctx, "|");
- sql_field_seek(mdb, 0);
- for (i = 0; i < sql_num_fields(mdb); i++) {
- field = sql_fetch_field(mdb);
- bsnprintf(buf, sizeof(buf), " %-*s |", (int)field->max_length, field->name);
- send(ctx, buf);
- }
- send(ctx, "\n");
- list_dashes(mdb, send, ctx);
-
- while ((row = sql_fetch_row(mdb)) != NULL) {
- sql_field_seek(mdb, 0);
- send(ctx, "|");
- for (i = 0; i < sql_num_fields(mdb); i++) {
- field = sql_fetch_field(mdb);
- if (row[i] == NULL) {
- bsnprintf(buf, sizeof(buf), " %-*s |", (int)field->max_length, "NULL");
- } else if (IS_NUM(field->type)) {
- bsnprintf(buf, sizeof(buf), " %*s |", (int)field->max_length,
- add_commas(row[i], ewc));
- } else {
- bsnprintf(buf, sizeof(buf), " %-*s |", (int)field->max_length, row[i]);
- }
- send(ctx, buf);
- }
- send(ctx, "\n");
- }
- list_dashes(mdb, send, ctx);
- return;
-
-vertical_list:
-
- while ((row = sql_fetch_row(mdb)) != NULL) {
- sql_field_seek(mdb, 0);
- for (i = 0; i < sql_num_fields(mdb); i++) {
- field = sql_fetch_field(mdb);
- if (row[i] == NULL) {
- bsnprintf(buf, sizeof(buf), " %*s: %s\n", max_len, field->name, "NULL");
- } else if (IS_NUM(field->type)) {
- bsnprintf(buf, sizeof(buf), " %*s: %s\n", max_len, field->name,
- add_commas(row[i], ewc));
- } else {
- bsnprintf(buf, sizeof(buf), " %*s: %s\n", max_len, field->name, row[i]);
- }
- send(ctx, buf);
- }
- send(ctx, "\n");
- }
- return;
-}
+ Dmsg1(50, "we have need space of %d bytes\n", sizeof(char *) * mdb->num_fields);
-POSTGRESQL_ROW my_postgresql_fetch_row(B_DB *mdb) {
- int nFields;
- int j;
- POSTGRESQL_ROW row = NULL; // by default, return NULL
+ if (mdb->row != NULL) {
+ Dmsg0(50, "my_postgresql_fetch_row freeing space\n");
+ free(mdb->row);
+ mdb->row = NULL;
+ }
+
+ mdb->row = (POSTGRESQL_ROW) malloc(sizeof(char *) * mdb->num_fields);
- Dmsg0(50, "my_postgresql_fetch_row start\n");
- ASSERT(mdb->row != NULL);
+ // now reset the row_number now that we have the space allocated
+ mdb->row_number = 0;
+ }
// if still within the result set
if (mdb->row_number < mdb->num_rows) {
- Dmsg2(50, "my_postgresql_fetch_row row number '%d' is acceptable (0..%d)\n", mdb->row_number, mdb->num_rows);
- // allocate space for one row
+ Dmsg2(50, "my_postgresql_fetch_row row number '%d' is acceptable (0..%d)\n", mdb->row_number, mdb->num_rows);
// get each value from this row
for (j = 0; j < mdb->num_fields; j++) {
mdb->row[j] = PQgetvalue(mdb->result, mdb->row_number, j);
- Dmsg2(50, "my_postgresql_fetch_row field '%d' is '%s'\n", j, mdb->row[j]);
+ Dmsg2(50, "my_postgresql_fetch_row field '%d' has value '%s'\n", j, mdb->row[j]);
}
// increment the row number for the next call
mdb->row_number++;
row = mdb->row;
} else {
- Dmsg2(50, "my_postgresql_fetch_row row number '%d' is NOT acceptable (0..%d)\n", mdb->row_number, mdb->num_rows);
+ Dmsg2(50, "my_postgresql_fetch_row row number '%d' is NOT acceptable (0..%d)\n", mdb->row_number, mdb->num_rows);
}
- Dmsg1(50, "my_postgresql_fetch_row finishes returning %x\n", row);
+ Dmsg1(50, "my_postgresql_fetch_row finishes returning %x\n", row);
return row;
}
-POSTGRESQL_FIELD * my_postgresql_fetch_field(B_DB *mdb) {
- mdb->field.name = PQfname (mdb->result, mdb->field_number);
-
- // I am not sure this returns the max width of the result set
- mdb->field.max_length = PQfsize (mdb->result, mdb->field_number);
-
- // I am not sure this returns what we can use
- mdb->field.type = PQftype (mdb->result, mdb->field_number);
+int my_postgresql_max_length(B_DB *mdb, int field_num) {
+ //
+ // for a given column, find the max length
+ //
+ int max_length;
+ int i;
+ int this_length;
+
+ max_length = 0;
+ for (i = 0; i < mdb->num_rows; i++) {
+ if (PQgetisnull(mdb->result, i, field_num)) {
+ this_length = 4; // "NULL"
+ } else {
+ this_length = strlen(PQgetvalue(mdb->result, i, field_num));
+ }
+
+ if (max_length < this_length) {
+ max_length = this_length;
+ }
+ }
- mdb->field.flags = PQgetisnull(mdb->result, mdb->row_number, mdb->field_number);
+ return max_length;
+}
- return &mdb->field;
+POSTGRESQL_FIELD * my_postgresql_fetch_field(B_DB *mdb)
+{
+ int i;
+
+ Dmsg0(50, "my_postgresql_fetch_field starts\n");
+ if (mdb->fields == NULL) {
+ Dmsg1(50, "allocating space for %d fields\n", mdb->num_fields);
+ mdb->fields = (POSTGRESQL_FIELD *)
+ malloc(sizeof(POSTGRESQL_FIELD) * mdb->num_fields);
+
+ for (i = 0; i < mdb->num_fields; i++) {
+ Dmsg1(50, "filling field %d\n", i);
+ mdb->fields[i].name = PQfname(mdb->result, i);
+ mdb->fields[i].max_length = my_postgresql_max_length(mdb, i);
+ mdb->fields[i].type = PQftype(mdb->result, i);
+ mdb->fields[i].flags = 0;
+
+ Dmsg4(50, "my_postgresql_fetch_field finds field '%s' has length='%d' type='%d' and IsNull=%d\n",
+ mdb->fields[i].name, mdb->fields[i].max_length, mdb->fields[i].type,
+ mdb->fields[i].flags);
+ } // end for
+ } // end if
+
+ // increment field number for the next time around
+
+ Dmsg0(50, "my_postgresql_fetch_field finishes\n");
+ return &mdb->fields[mdb->field_number++];
}
-void my_postgresql_data_seek(B_DB *mdb, int row) {
+void my_postgresql_data_seek(B_DB *mdb, int row)
+{
// set the row number to be returned on the next call
// to my_postgresql_fetch_row
mdb->row_number = row;
}
-void my_postgresql_field_seek(B_DB *mdb, int field) {
+void my_postgresql_field_seek(B_DB *mdb, int field)
+{
mdb->field_number = field;
}
int my_postgresql_query(B_DB *mdb, char *query) {
- Dmsg0(50, "my_postgresql_query started\n");
+ Dmsg0(50, "my_postgresql_query started\n");
// We are starting a new query. reset everything.
- mdb->num_rows = -1;
+ mdb->num_rows = -1;
mdb->row_number = -1;
mdb->field_number = -1;
- if (mdb->row) {
- Dmsg0(50, "my_postgresql_query freeing space\n");
- free(mdb->row);
- mdb->row = NULL;
- }
-
-
- Dmsg1(50, "doing PQexec with '%s'\n", query);
+ Dmsg1(50, "my_postgresql_query starts with '%s'\n", query);
mdb->result = PQexec(mdb->db, query);
- if (PQresultStatus(mdb->result) == PGRES_TUPLES_OK) {
+ mdb->status = PQresultStatus(mdb->result);
+ if (mdb->status == PGRES_TUPLES_OK || mdb->status == PGRES_COMMAND_OK) {
+ Dmsg1(50, "we have a result\n", query);
- mdb->num_rows = PQntuples(mdb->result);
// how many fields in the set?
- mdb->num_fields = PQnfields(mdb->result);
+ mdb->num_fields = (int) PQnfields(mdb->result);
+ Dmsg1(50, "we have %d fields\n", mdb->num_fields);
- // point at the first row for the fetch row function
- mdb->row_number = 0;
+ mdb->num_rows = PQntuples(mdb->result);
+ Dmsg1(50, "we have %d rows\n", mdb->num_rows);
- mdb->row = (POSTGRESQL_ROW) malloc(sizeof(char *) * mdb->num_fields);
- Dmsg2(50, "PQexec was OK. rows=%d columns=%d\n", mdb->num_rows, mdb->num_fields);
mdb->status = 0;
} else {
+ Dmsg1(50, "we failed\n", query);
mdb->status = 1;
}
- Dmsg0(50, "my_postgresql_query finishing\n");
+ Dmsg0(50, "my_postgresql_query finishing\n");
return mdb->status;
}
-void my_postgresql_free_result (B_DB *mdb) {
- PQclear(mdb->result);
- free(mdb->row);
- mdb->row = NULL;
+void my_postgresql_free_result (B_DB *mdb)
+{
+ if (mdb->result) {
+ PQclear(mdb->result);
+ }
+
+ if (mdb->row) {
+ free(mdb->row);
+ mdb->row = NULL;
+ }
+
+ if (mdb->fields) {
+ free(mdb->fields);
+ mdb->fields = NULL;
+ }
+}
+
+int my_postgresql_currval(B_DB *mdb, char *table_name)
+{
+ // Obtain the current value of the sequence that
+ // provides the serial value for primary key of the table.
+
+ // currval is local to our session. It is not affected by
+ // other transactions.
+
+ // Determine the name of the sequence.
+ // PostgreSQL automatically creates a sequence using
+ // <table>_<column>_seq.
+ // At the time of writing, all tables used this format for
+ // for their primary key: <table>id
+ // Except for basefiles which has a primary key on baseid.
+ // Therefore, we need to special case that one table.
+
+ // everything else can use the PostgreSQL formula.
+
+ char sequence[NAMEDATALEN-1];
+ char query [NAMEDATALEN+50];
+ PGresult *result;
+ int id = 0;
+
+ if (strcasecmp(table_name, "basefiles") == 0) {
+ bstrncpy(sequence, "basefiles_baseid", sizeof(sequence));
+ } else {
+ bstrncpy(sequence, table_name, sizeof(sequence));
+ bstrncat(sequence, "_", sizeof(sequence));
+ bstrncat(sequence, table_name, sizeof(sequence));
+ bstrncat(sequence, "id", sizeof(sequence));
+ }
+
+ bstrncat(sequence, "_seq", sizeof(sequence));
+ bsnprintf(query, sizeof(query), "SELECT currval('%s')", sequence);
+
+// Mmsg(&query, "SELECT currval('%s')", sequence);
+ Dmsg1(50, "my_postgresql_currval invoked with '%s'\n", query);
+ result = PQexec(mdb->db, query);
+
+ Dmsg0(50, "exec done");
+
+ if (PQresultStatus(result) == PGRES_TUPLES_OK) {
+ Dmsg0(50, "getting value");
+ id = atoi(PQgetvalue(result, 0, 0));
+ Dmsg2(50, "got value '%s' which became %d\n", PQgetvalue(result, 0, 0), id);
+ } else {
+ Mmsg1(&mdb->errmsg, _("error fetching currval: %s\n"), PQerrorMessage(mdb->db));
+ }
+
+ PQclear(result);
+
+ return id;
}
projects / bacula / bacula / blobdiff