def get(self, database, query):
if not self.has_extension("pg_qualstats"):
raise HTTPError(501, "PG qualstats is not installed")
base_query = qualstat_getstatdata()
c = inner_cc(base_query)
base_query.append_from(text("""LATERAL unnest(quals) as qual"""))
base_query = (base_query.where(c.queryid == query).having(
func.bool_or(column('eval_type') == 'f')).having(
c.execution_count > 1000).having(c.occurences > 0).having(
c.filter_ratio > 0.5).params(**{
'from': '-infinity',
'to': 'infinity'
}))
optimizable = list(self.execute(base_query, params={'query': query}))
optimizable = resolve_quals(self.connect(database=database),
optimizable, 'quals')
hypoplan = None
indexes = {}
for qual in optimizable:
indexes[qual.where_clause] = possible_indexes(qual)
hypo_version = self.has_extension("hypopg", database=database)
if indexes and hypo_version and hypo_version >= "0.0.3":
# identify indexes
# create them
allindexes = [
ind for indcollection in indexes.values()
for ind in indcollection
]
for ind in allindexes:
ddl = ind.hypo_ddl
if ddl is not None:
ind.name = self.execute(ddl, database=database).scalar()
# Build the query and fetch the plans
querystr = get_any_sample_query(self, database, query,
self.get_argument("from"),
self.get_argument("to"))
try:
hypoplan = get_hypoplans(self.connect(database=database),
querystr, allindexes)
except:
# TODO: offer the possibility to fill in parameters from the UI
self.flash("We couldn't get plans for this query, presumably "
"because some parameters are missing ")
self.render("database/query/indexes.html",
indexes=indexes,
hypoplan=hypoplan)
def get(self, database, query):
if not self.has_extension("pg_qualstats"):
raise HTTPError(501, "PG qualstats is not installed")
base_query = qualstat_getstatdata()
c = inner_cc(base_query)
base_query.append_from(text("""LATERAL unnest(quals) as qual"""))
base_query = (base_query
.where(c.queryid == query)
.having(func.bool_or(column('eval_type') == 'f'))
.having(c.execution_count > 1000)
.having(c.occurences > 0)
.having(c.filter_ratio > 0.5)
.params(**{'from': '-infinity',
'to': 'infinity'}))
optimizable = list(self.execute(base_query, params={'query': query}))
optimizable = resolve_quals(self.connect(database=database),
optimizable,
'quals')
hypoplan = None
indexes = {}
for qual in optimizable:
indexes[qual.where_clause] = possible_indexes(qual)
hypo_version = self.has_extension("hypopg", database=database)
if hypo_version and hypo_version >= "0.0.3":
# identify indexes
# create them
allindexes = [ind for indcollection in indexes.values()
for ind in indcollection]
for ind in allindexes:
ddl = ind.hypo_ddl
if ddl is not None:
ind.name = self.execute(ddl, database=database).scalar()
# Build the query and fetch the plans
querystr = get_any_sample_query(self, database, query,
self.get_argument("from"),
self.get_argument("to"))
try:
hypoplan = get_hypoplans(self.connect(database=database), querystr,
allindexes)
except:
# TODO: offer the possibility to fill in parameters from the UI
self.flash("We couldn't get plans for this query, presumably "
"because some parameters are missing ")
self.render("database/query/indexes.html", indexes=indexes,
hypoplan=hypoplan)