farrokhi/pg_repack
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Merge branch 'kotsachin-master'

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This commit is contained in:
Josh Kupershmidt 2015-05-25 17:26:31 -04:00
commit d3a99db9f9
4 changed files with 114 additions and 31 deletions
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63
bin/pg_repack.c
View File

@ -204,6 +204,7 @@ static void repack_one_table(repack_table *table, const char *order_by);
static bool repack_table_indexes(PGresult *index_details);
static bool repack_all_indexes(char *errbuf, size_t errsize);
static void repack_cleanup(bool fatal, const repack_table *table);
static void repack_cleanup_callback(bool fatal, void *userdata);
static bool rebuild_indexes(const repack_table *table);
static char *getstr(PGresult *res, int row, int col);
@ -235,13 +236,20 @@ static bool only_indexes = false;
static int wait_timeout = 60; /* in seconds */
static int jobs = 0; /* number of concurrent worker conns. */
static bool dryrun = false;
static unsigned int temp_obj_num = 0; /* temporary objects counter */
/* buffer should have at least 11 bytes */
static char *
utoa(unsigned int value, char *buffer)
{
sprintf(buffer, "%u", value);
return buffer;
/* XXX: originally, we would just return buffer here without
* the pgut_strdup(). But repack_cleanup_callback() seems to
* depend on getting back a freshly strdup'd copy of buffer,
* not sure why. So now we are leaking a tiny bit of memory
* with each utoa() call.
*/
return pgut_strdup(buffer);
}
static pgut_option options[] =
@ -898,6 +906,13 @@ rebuild_indexes(const repack_table *table)
ret = select(max_fd + 1, &input_mask, NULL, NULL, &timeout);
#endif
/* XXX: the errno != EINTR check means we won't bail
* out on SIGINT. We should probably just remove this
* check, though it seems we also need to fix up
* the on_interrupt handling for workers' index
* builds (those PGconns don't seem to have c->cancel
* set, so we don't cancel the in-progress builds).
*/
if (ret < 0 && errno != EINTR)
elog(ERROR, "poll() failed: %d, %d", ret, errno);
@ -990,7 +1005,7 @@ static void
repack_one_table(repack_table *table, const char *orderby)
{
PGresult *res = NULL;
const char *params[2];
const char *params[3];
int num;
char *vxid = NULL;
char buffer[12];
@ -1042,6 +1057,9 @@ repack_one_table(repack_table *table, const char *orderby)
if (dryrun)
return;
/* push repack_cleanup_callback() on stack to clean temporary objects */
pgut_atexit_push(repack_cleanup_callback, &table->target_oid);
/*
* 1. Setup advisory lock and trigger on main table.
*/
@ -1146,8 +1164,11 @@ repack_one_table(repack_table *table, const char *orderby)
CLEARPGRES(res);
command(table->create_pktype, 0, NULL);
temp_obj_num++;
command(table->create_log, 0, NULL);
temp_obj_num++;
command(table->create_trigger, 0, NULL);
temp_obj_num++;
command(table->enable_trigger, 0, NULL);
printfStringInfo(&sql, "SELECT repack.disable_autovacuum('repack.log_%u')", table->target_oid);
command(sql.data, 0, NULL);
@ -1283,6 +1304,7 @@ repack_one_table(repack_table *table, const char *orderby)
goto cleanup;
command(table->create_table, 0, NULL);
temp_obj_num++;
printfStringInfo(&sql, "SELECT repack.disable_autovacuum('repack.table_%u')", table->target_oid);
if (table->drop_columns)
command(table->drop_columns, 0, NULL);
@ -1375,8 +1397,10 @@ repack_one_table(repack_table *table, const char *orderby)
elog(DEBUG2, "---- drop ----");
command("BEGIN ISOLATION LEVEL READ COMMITTED", 0, NULL);
command("SELECT repack.repack_drop($1)", 1, params);
params[1] = utoa(temp_obj_num, buffer);
command("SELECT repack.repack_drop($1, $2)", 2, params);
command("COMMIT", 0, NULL);
temp_obj_num = 0; /* reset temporary object counter after cleanup */
/*
* 7. Analyze.
@ -1395,7 +1419,7 @@ repack_one_table(repack_table *table, const char *orderby)
/* Release advisory lock on table. */
params[0] = REPACK_LOCK_PREFIX_STR;
params[1] = buffer;
params[1] = utoa(table->target_oid, buffer);
res = pgut_execute(connection, "SELECT pg_advisory_unlock($1, CAST(-2147483648 + $2::bigint AS integer))",
2, params);
@ -1675,6 +1699,31 @@ lock_exclusive(PGconn *conn, const char *relid, const char *lock_query, bool sta
return ret;
}
/* This function calls to repack_drop() to clean temporary objects on error
* in creation of temporary objects.
*/
void
repack_cleanup_callback(bool fatal, void *userdata)
{
Oid target_table = *(Oid *) userdata;
const char *params[2];
char buffer[12];
if(fatal)
{
params[0] = utoa(target_table, buffer);
params[1] = utoa(temp_obj_num, buffer);
/* testing PQstatus() of connection and conn2, as we do
* in repack_cleanup(), doesn't seem to work here,
* so just use an unconditional reconnect().
*/
reconnect(ERROR);
command("SELECT repack.repack_drop($1, $2)", 2, params);
temp_obj_num = 0; /* reset temporary object counter after cleanup */
}
}
/*
* The userdata pointing a table being re-organized. We need to cleanup temp
* objects before the program exits.
@ -1689,7 +1738,7 @@ repack_cleanup(bool fatal, const repack_table *table)
else
{
char buffer[12];
const char *params[1];
const char *params[2];
/* Try reconnection if not available. */
if (PQstatus(connection) != CONNECTION_OK ||
@ -1698,7 +1747,9 @@ repack_cleanup(bool fatal, const repack_table *table)
/* do cleanup */
params[0] = utoa(table->target_oid, buffer);
command("SELECT repack.repack_drop($1)", 1, params);
params[1] = utoa(temp_obj_num, buffer);
command("SELECT repack.repack_drop($1, $2)", 2, params);
temp_obj_num = 0; /* reset temporary object counter after cleanup */
}
}

20
bin/pgut/pgut.c
View File

@ -64,7 +64,7 @@ static void on_before_exec(pgutConn *conn);
static void on_after_exec(pgutConn *conn);
static void on_interrupt(void);
static void on_cleanup(void);
static void exit_or_abort(int exitcode);
static void exit_or_abort(int exitcode, int elevel);
void
pgut_init(int argc, char **argv)
@ -872,7 +872,10 @@ pgut_errfinish(int dummy, ...)
edata->detail.data);
if (pgut_abort_level <= edata->elevel && edata->elevel <= PANIC)
exit_or_abort(edata->code);
{
in_cleanup = true; /* need to be set for cleaning temporary objects on error */
exit_or_abort(edata->code, edata->elevel);
}
}
#ifndef PGUT_OVERRIDE_ELOG
@ -1180,7 +1183,9 @@ call_atexit_callbacks(bool fatal)
pgut_atexit_item *item;
for (item = pgut_atexit_stack; item; item = item->next)
{
item->callback(fatal, item->userdata);
}
}
static void
@ -1193,12 +1198,19 @@ on_cleanup(void)
}
static void
exit_or_abort(int exitcode)
exit_or_abort(int exitcode, int elevel)
{
if (in_cleanup)
if (in_cleanup && FATAL > elevel)
{
/* oops, error in cleanup*/
call_atexit_callbacks(true);
exit(exitcode);
}
else if (FATAL <= elevel <= PANIC)
{
/* on FATAL or PANIC */
call_atexit_callbacks(true);
abort();
}
else

2
lib/pg_repack.sql.in
View File

@ -247,7 +247,7 @@ CREATE FUNCTION repack.repack_swap(oid) RETURNS void AS
'MODULE_PATHNAME', 'repack_swap'
LANGUAGE C VOLATILE STRICT;
CREATE FUNCTION repack.repack_drop(oid) RETURNS void AS
CREATE FUNCTION repack.repack_drop(oid, int) RETURNS void AS
'MODULE_PATHNAME', 'repack_drop'
LANGUAGE C VOLATILE STRICT;

60
lib/repack.c
View File

@ -928,6 +928,7 @@ Datum
repack_drop(PG_FUNCTION_ARGS)
{
Oid oid = PG_GETARG_OID(0);
int numobj = PG_GETARG_INT32(1);
const char *relname = get_quoted_relname(oid);
const char *nspname = get_quoted_nspname(oid);
@ -943,14 +944,41 @@ repack_drop(PG_FUNCTION_ARGS)
/* connect to SPI manager */
repack_init();
/* drop log table: must be done before dropping the pk type,
* since the log table is dependent on the pk type. (That's
* why we check numobj > 1 here.)
*/
if (numobj > 1)
{
execute_with_format(
SPI_OK_UTILITY,
"DROP TABLE IF EXISTS repack.log_%u CASCADE",
oid);
--numobj;
}
/* drop type for pk type */
if (numobj > 0)
{
execute_with_format(
SPI_OK_UTILITY,
"DROP TYPE IF EXISTS repack.pk_%u",
oid);
--numobj;
}
/*
* drop repack trigger: We have already dropped the trigger in normal
* cases, but it can be left on error.
*/
execute_with_format(
SPI_OK_UTILITY,
"DROP TRIGGER IF EXISTS z_repack_trigger ON %s.%s CASCADE",
nspname, relname);
if (numobj > 0)
{
execute_with_format(
SPI_OK_UTILITY,
"DROP TRIGGER IF EXISTS z_repack_trigger ON %s.%s CASCADE",
nspname, relname);
--numobj;
}
#if PG_VERSION_NUM < 80400
/* delete autovacuum settings */
@ -965,23 +993,15 @@ repack_drop(PG_FUNCTION_ARGS)
oid, oid);
#endif
/* drop log table */
execute_with_format(
SPI_OK_UTILITY,
"DROP TABLE IF EXISTS repack.log_%u CASCADE",
oid);
/* drop temp table */
execute_with_format(
SPI_OK_UTILITY,
"DROP TABLE IF EXISTS repack.table_%u CASCADE",
oid);
/* drop type for log table */
execute_with_format(
SPI_OK_UTILITY,
"DROP TYPE IF EXISTS repack.pk_%u CASCADE",
oid);
if (numobj > 0)
{
execute_with_format(
SPI_OK_UTILITY,
"DROP TABLE IF EXISTS repack.table_%u CASCADE",
oid);
--numobj;
}
SPI_finish();