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Issue - (#21): Show objects(tables) involved in the query.

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PG-96
This commit is contained in:
Ibrar Ahmed
2020-11-24 20:10:49 +00:00
parent 9efa05de97
commit 057150c99b
5 changed files with 75 additions and 163 deletions
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44
hash_query.c
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@@ -16,7 +16,6 @@
static pgssSharedState *pgss;
static HTAB *pgss_hash;
static HTAB *pgss_object_hash;
static HTAB* hash_init(const char *hash_name, int key_size, int entry_size, int hash_size);
@@ -40,7 +39,6 @@ pgss_startup(void)
pgss = NULL;
pgss_hash = NULL;
pgss_object_hash = NULL;
/*
* Create or attach to the shared memory state, including hash table
@@ -66,7 +64,6 @@ pgss_startup(void)
}
pgss_hash = hash_init("pg_stat_monitor: Queries hashtable", sizeof(pgssHashKey), sizeof(pgssEntry),PGSM_MAX);
pgss_object_hash = hash_init("pg_stat_monitor: Object hashtable", sizeof(pgssObjectHashKey), sizeof(pgssObjectEntry), PGSM_OBJECT_CACHE);
LWLockRelease(AddinShmemInitLock);
@@ -197,44 +194,6 @@ hash_entry_reset()
LWLockRelease(pgss->lock);
}
void
hash_alloc_object_entry(uint64 queryid, char *objects)
{
pgssObjectEntry *entry = NULL;
bool found;
pgssObjectHashKey key;
LWLockAcquire(pgss->lock, LW_EXCLUSIVE);
key.queryid = queryid;
entry = (pgssObjectEntry *) hash_search(pgss_object_hash, &key, HASH_ENTER, &found);
if (!found)
{
SpinLockAcquire(&entry->mutex);
snprintf(entry->tables_name, MAX_REL_LEN, "%s", objects);
SpinLockRelease(&entry->mutex);
}
LWLockRelease(pgss->lock);
}
/* De-alocate memory */
void
hash_dealloc_object_entry(uint64 queryid, char *objects)
{
pgssObjectHashKey key;
pgssObjectEntry *entry;
key.queryid = queryid;
LWLockAcquire(pgss->lock, LW_EXCLUSIVE);
entry = (pgssObjectEntry *) hash_search(pgss_object_hash, &key, HASH_FIND, NULL);
if (entry != NULL)
{
snprintf(objects, MAX_REL_LEN, "%s", entry->tables_name);
hash_search(pgss_object_hash, &entry->key, HASH_REMOVE, NULL);
}
LWLockRelease(pgss->lock);
}
pgssEntry*
hash_create_query_entry(unsigned int queryid,
unsigned int userid,
@@ -270,7 +229,6 @@ bool
IsHashInitialize(void)
{
return (pgss != NULL &&
pgss_hash != NULL &&
pgss_object_hash !=NULL);
pgss_hash != NULL);
}