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Clean up pg_upgrade cache lookup code; remove useless NULL pointer tests.

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This commit is contained in:
Bruce Momjian 2010-10-20 20:02:00 +00:00
parent 18e752f226
commit a52aa6c6db
2 changed files with 12 additions and 20 deletions
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30
contrib/pg_upgrade/info.c
View File

@ -74,8 +74,8 @@ gen_db_file_maps(DbInfo *old_db, DbInfo *new_db,
num_maps++;
/*
* so much for the mapping of this relation. Now we need a mapping for
* its corresponding toast relation if any.
* So much for mapping this relation; now we need a mapping
* for its corresponding toast relation, if any.
*/
if (oldrel->toastrelid > 0)
{
@ -117,6 +117,7 @@ gen_db_file_maps(DbInfo *old_db, DbInfo *new_db,
newrel->reloid);
/* look them up in their respective arrays */
/* we lose our cache location here */
old_toast = relarr_lookup_rel(&old_db->rel_arr,
"pg_toast", old_name, CLUSTER_OLD);
new_toast = relarr_lookup_rel(&new_db->rel_arr,
@ -385,7 +386,7 @@ get_rel_infos(const DbInfo *dbinfo, RelInfoArr *relarr, Cluster whichCluster)
relarr->rels = relinfos;
relarr->nrels = num_rels;
relarr->cache_name_rel = 0;
relarr->last_relname_lookup = 0;
}
@ -399,9 +400,6 @@ dbarr_lookup_db(DbInfoArr *db_arr, const char *db_name)
{
int dbnum;
if (!db_arr || !db_name)
return NULL;
for (dbnum = 0; dbnum < db_arr->ndbs; dbnum++)
{
if (strcmp(db_arr->dbs[dbnum].db_name, db_name) == 0)
@ -424,16 +422,13 @@ relarr_lookup_rel(RelInfoArr *rel_arr, const char *nspname,
{
int relnum;
if (!rel_arr || !relname)
return NULL;
/* Test next lookup first, for speed */
if (rel_arr->cache_name_rel + 1 < rel_arr->nrels &&
strcmp(rel_arr->rels[rel_arr->cache_name_rel + 1].nspname, nspname) == 0 &&
strcmp(rel_arr->rels[rel_arr->cache_name_rel + 1].relname, relname) == 0)
if (rel_arr->last_relname_lookup + 1 < rel_arr->nrels &&
strcmp(rel_arr->rels[rel_arr->last_relname_lookup + 1].nspname, nspname) == 0 &&
strcmp(rel_arr->rels[rel_arr->last_relname_lookup + 1].relname, relname) == 0)
{
rel_arr->cache_name_rel++;
return &rel_arr->rels[rel_arr->cache_name_rel];
rel_arr->last_relname_lookup++;
return &rel_arr->rels[rel_arr->last_relname_lookup];
}
for (relnum = 0; relnum < rel_arr->nrels; relnum++)
@ -441,7 +436,7 @@ relarr_lookup_rel(RelInfoArr *rel_arr, const char *nspname,
if (strcmp(rel_arr->rels[relnum].nspname, nspname) == 0 &&
strcmp(rel_arr->rels[relnum].relname, relname) == 0)
{
rel_arr->cache_name_rel = relnum;
rel_arr->last_relname_lookup = relnum;
return &rel_arr->rels[relnum];
}
}
@ -464,9 +459,6 @@ relarr_lookup_reloid(RelInfoArr *rel_arr, Oid oid,
{
int relnum;
if (!rel_arr || !oid)
return NULL;
for (relnum = 0; relnum < rel_arr->nrels; relnum++)
{
if (rel_arr->rels[relnum].reloid == oid)
@ -483,7 +475,7 @@ relarr_free(RelInfoArr *rel_arr)
{
pg_free(rel_arr->rels);
rel_arr->nrels = 0;
rel_arr->cache_name_rel = 0;
rel_arr->last_relname_lookup = 0;
}

2
contrib/pg_upgrade/pg_upgrade.h
View File

@ -78,7 +78,7 @@ typedef struct
{
RelInfo *rels;
int nrels;
int cache_name_rel; /* cache of last lookup location */
int last_relname_lookup; /* cache of last lookup location */
} RelInfoArr;
/*