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Commit 72891a4b authored by Jean-Paul Smets's avatar Jean-Paul Smets
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provides from_table_list to optimise queries and uses where_expression 


git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@1360 20353a03-c40f-0410-a6d1-a30d3c3de9de
parent 3a892089
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Showing with 79 additions and 45 deletions
product/ZSQLCatalog/SQLCatalog.py
View file @ 72891a4b
......@@ -35,7 +35,7 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
An Object Catalog maintains a table of object metadata, and a
series of manageable indexes to quickly search for objects
(references in the metadata) that satisfy a search query.
(references in the metadata) that satisfy a search where_expression.
This class is not Zope specific, and can be used in any python
program to build catalogs of objects. Note that it does require
......@@ -116,6 +116,8 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
"""
Calls the show column method and returns dictionnary of
Field Ids
XXX This should be cached
"""
method_name = self.sql_catalog_schema
keys = {}
......@@ -132,6 +134,30 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
keys.sort()
return keys
def getColumnMap(self):
"""
Calls the show column method and returns dictionnary of
Field Ids
XXX This should be cached
"""
method_name = self.sql_catalog_schema
keys = {}
for table in self.getCatalogSearchTableIds():
try:
method = getattr(self, method_name)
search_result = method(table=table)
for c in search_result:
key = c.Field
if not keys.has_key(key): keys[c.Field] = []
keys[key].append(table)
key = '%s.%s' % (table, c.Field)
if not keys.has_key(key): keys[key] = []
keys[key].append(table) # Is this inconsistent ?
except:
pass
return keys
def getResultColumnIds(self):
"""
Calls the show column method and returns dictionnary of
......@@ -222,7 +248,7 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
'uid' is the unique Catalog identifier for this object
"""
LOG('Catalog object:',0,str(path))
#LOG('Catalog object:',0,str(path))
# Prepare the dictionnary of values
kw = {}
......@@ -243,7 +269,7 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
if (uid != index):
# Update uid attribute of object
uid = int(index)
LOG("Write Uid",0, "uid %s index %s" % (uid, index))
#LOG("Write Uid",0, "uid %s index %s" % (uid, index))
object.uid = uid
# We will check if there is an filter on this
# method, if so we may not call this zsqlMethod
......@@ -253,7 +279,7 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
if self.filter_dict.has_key(method_name):
portal_type = object.getPortalType()
if portal_type not in (self.filter_dict[method_name]['type']):
LOG('catalog_object',0,'XX1 this method is broken because not in types: %s' % method_name)
#LOG('catalog_object',0,'XX1 this method is broken because not in types: %s' % method_name)
continue
else:
expression = self.filter_dict[method_name]['expression_instance']
......@@ -263,7 +289,7 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
if not result:
#LOG('catalog_object',0,'XX2 this method is broken because expression: %s' % method_name)
continue
LOG('catalog_object',0,'this method is not broken: %s' % method_name)
#LOG('catalog_object',0,'this method is not broken: %s' % method_name)
# Get the appropriate SQL Method
# Lookup by path is required because of OFS Semantics
method = getattr(self, method_name)
......@@ -284,11 +310,11 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
kw['path'] = path
kw['uid'] = int(index)
kw['insert_catalog_line'] = 0
LOG("SQLCatalog Warning: insert_catalog_line, case1 value",0,0)
#LOG("SQLCatalog Warning: insert_catalog_line, case1 value",0,0)
# LOG
# LOG("Call SQL Method %s with args:" % method_name,0, str(kw))
# Alter row
LOG("Call SQL Method %s with args:" % method_name,0, str(kw))
#LOG("Call SQL Method %s with args:" % method_name,0, str(kw))
method(**kw)
else:
# Get the appropriate SQL Method
......@@ -301,22 +327,22 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
if catalog_path == "reserved":
# Reserved line in catalog table
insert_catalog_line = 0
LOG("SQLCatalog Warning: insert_catalog_line, case2",0,insert_catalog_line)
#LOG("SQLCatalog Warning: insert_catalog_line, case2",0,insert_catalog_line)
elif catalog_path is None:
# No line in catalog table
insert_catalog_line = 1
LOG("SQLCatalog Warning: insert_catalog_line, case3",0,insert_catalog_line)
#LOG("SQLCatalog Warning: insert_catalog_line, case3",0,insert_catalog_line)
else:
LOG('SQLCatalog WARNING',0,'assigning new uid to already catalogued object %s' % path)
#LOG('SQLCatalog WARNING',0,'assigning new uid to already catalogued object %s' % path)
uid = 0
insert_catalog_line = 0
LOG("SQLCatalog Warning: insert_catalog_line, case4",0,insert_catalog_line)
#LOG("SQLCatalog Warning: insert_catalog_line, case4",0,insert_catalog_line)
if not uid:
# Generate UID
index = self.newUid()
object.uid = index
insert_catalog_line = 0
LOG("SQLCatalog Warning: insert_catalog_line, case5",0,insert_catalog_line)
#LOG("SQLCatalog Warning: insert_catalog_line, case5",0,insert_catalog_line)
else:
index = uid
for method_name in self.sql_catalog_object:
......@@ -327,7 +353,7 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
if self.filter_dict.has_key(method_name):
portal_type = object.getPortalType()
if portal_type not in (self.filter_dict[method_name]['type']):
LOG('catalog_object',0,'XX1 this method is broken because not in types: %s' % method_name)
#LOG('catalog_object',0,'XX1 this method is broken because not in types: %s' % method_name)
continue
else:
expression = self.filter_dict[method_name]['expression_instance']
......@@ -335,9 +361,9 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
econtext = self.getExpressionContext(object)
result = expression(econtext)
if not result:
LOG('catalog_object',0,'XX2 this method is broken because expression: %s' % method_name)
#LOG('catalog_object',0,'XX2 this method is broken because expression: %s' % method_name)
continue
LOG('catalog_object',0,'this method is not broken: %s' % method_name)
#LOG('catalog_object',0,'this method is not broken: %s' % method_name)
method = getattr(self, method_name)
if method.meta_type == "Z SQL Method":
......@@ -350,7 +376,7 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
value = value()
kw[arg] = value
except:
LOG("SQLCatalog Warning: Callable value could not be called",0,str((path, arg, method_name)))
#LOG("SQLCatalog Warning: Callable value could not be called",0,str((path, arg, method_name)))
kw[arg] = None
method = aq_base(method).__of__(object.__of__(self)) # Use method in the context of object
# Generate UID
......@@ -377,7 +403,7 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
XXX Add filter of methods
"""
LOG('Uncatalog object:',0,str(path))
#LOG('Uncatalog object:',0,str(path))
uid = self.getUidForPath(path)
methods = self.sql_uncatalog_object
......@@ -487,7 +513,7 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
"""
def queryResults(self, sql_method, REQUEST=None, used=None, **kw):
""" Builds a complex SQL query to simulate ZCalatog behaviour """
""" Builds a complex SQL where_expression to simulate ZCalatog behaviour """
""" Returns a list of brains from a set of constraints on variables """
# Get search arguments:
......@@ -501,28 +527,32 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
if kw is None or kw == {}:
kw = REQUEST
acceptable_key_map = self.getColumnMap()
acceptable_keys = acceptable_key_map.keys()
full_text_search_keys = self.sql_catalog_full_text_search_keys
keyword_search_keys = self.sql_catalog_keyword_search_keys
# We take additional parameters from the REQUEST
# and give priority to the REQUEST
if REQUEST is not None:
acceptable_keys = self.getColumnIds()
if REQUEST is not None:
for key in acceptable_keys:
if REQUEST.has_key(key):
# Only copy a few keys from the REQUEST
if key in self.sql_catalog_request_keys:
kw[key] = REQUEST[key]
# Let us start building the query
# Let us start building the where_expression
if kw:
query = []
acceptable_keys = self.getColumnIds()
full_text_search_keys = self.sql_catalog_full_text_search_keys
keyword_search_keys = self.sql_catalog_keyword_search_keys
where_expression = []
from_table_dict = {'catalog': 1} # Always include catalog table
for key, value in kw.items():
if key not in ('query', 'sort-on', 'sort_on', 'sort-order', 'sort_order'):
if key not in ('where_expression', 'sort-on', 'sort_on', 'sort-order', 'sort_order'):
# Make sure key belongs to schema
if key in acceptable_keys:
# uid is always ambiguous so we can only change it here
if key == 'uid': key = 'catalog.uid'
# Add table to table dict
from_table_dict[acceptable_key_map[key][0]] = 1 # We use catalog by default
# Default case: variable equality
if type(value) is type(''):
if value != '':
......@@ -531,19 +561,19 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
# But we consider the sign = as empty string
value=''
if '%' in value:
query += ["%s LIKE '%s'" % (key, value)]
where_expression += ["%s LIKE '%s'" % (key, value)]
elif value[0] == '>':
query += ["%s > '%s'" % (key, value[1:])]
where_expression += ["%s > '%s'" % (key, value[1:])]
elif value[0] == '<':
query += ["%s < '%s'" % (key, value[1:])]
where_expression += ["%s < '%s'" % (key, value[1:])]
elif key in keyword_search_keys:
# We must add % in the request to simulate the catalog
query += ["%s LIKE '%%%s%%'" % (key, value)]
where_expression += ["%s LIKE '%%%s%%'" % (key, value)]
elif key in full_text_search_keys:
# We must add % in the request to simulate the catalog
query += ["MATCH %s AGAINST ('%s')" % (key, value)]
where_expression += ["MATCH %s AGAINST ('%s')" % (key, value)]
else:
query += ["%s = '%s'" % (key, value)]
where_expression += ["%s = '%s'" % (key, value)]
elif type(value) is type([]) or type(value) is type(()):
# We have to create an OR from tuple or list
query_item = []
......@@ -565,17 +595,17 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
else:
query_item += ["%s = '%s'" % (key, str(value_item))]
if len(query_item) > 0:
query += ['(%s)' % join(query_item, ' OR ')]
where_expression += ['(%s)' % join(query_item, ' OR ')]
else:
query += ["%s = %s" % (key, value)]
elif key is 'query':
where_expression += ["%s = %s" % (key, value)]
elif key == 'where_expression':
# Not implemented yet
pass
if kw.has_key('query'):
if len(query) > 0:
kw['query'] = "(%s) AND (%s)" % (kw['query'], join(query, ' AND ') )
if kw.has_key('where_expression'):
if len(where_expression) > 0:
kw['where_expression'] = "(%s) AND (%s)" % (kw['where_expression'], join(where_expression, ' AND ') )
else:
kw['query'] = join(query, ' AND ')
kw['where_expression'] = join(where_expression, ' AND ')
#LOG("Search Query Args:",0,str(kw))
......@@ -624,11 +654,15 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
pass
# Return the result
# LOG('queryResults',0,'kw: %s' % str(kw))
return sql_method(**kw)
#LOG('acceptable_keys',0,'acceptable_keys: %s' % str(acceptable_keys))
#LOG('acceptable_key_map',0,'acceptable_key_map: %s' % str(acceptable_key_map))
#LOG('queryResults',0,'kw: %s' % str(kw))
#LOG('queryResults',0,'from_table_list: %s' % str(from_table_dict.keys()))
return sql_method(from_table_list = from_table_dict.keys(), **kw)
def searchResults(self, REQUEST=None, used=None, **kw):
""" Builds a complex SQL query to simulate ZCalatog behaviour """
""" Builds a complex SQL where_expression to simulate ZCalatog behaviour """
""" Returns a list of brains from a set of constraints on variables """
# The used argument is deprecated and is ignored
try:
......@@ -646,8 +680,8 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
__call__ = searchResults
def countResults(self, REQUEST=None, used=None, **kw):
""" Builds a complex SQL query to simulate ZCalatog behaviour """
""" Returns the number of items which satisfy the query """
""" Builds a complex SQL where_expression to simulate ZCalatog behaviour """
""" Returns the number of items which satisfy the where_expression """
try:
# Get the search method
#LOG("countResults: scr:",0,str(self.sql_count_results))
......@@ -660,7 +694,7 @@ class Catalog(Persistent, Acquisition.Implicit, ExtensionClass.Base):
kw['REQUEST'] = REQUEST
return self.queryResults(method, **kw)
except:
LOG("Warning: could not count catalog",0,str(self.sql_count_results))
LOG("Warning: could not count catalog",0,str(self.sql_count_results), error=sys.exc_info())
return [[0]]
class CatalogError(Exception): pass
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