ZSQLCatalog: Allow retrieving the entire schema in a single query. (part 2)

work partially done by Vincent Pelletier (z_get_table_schema)

product/ERP5/bootstrap/erp5_mysql_innodb_catalog/CatalogMethodTemplateItem/portal_catalog/erp5_mysql_innodb/z_get_table_schema.catalog_keys.xml

+<catalog_method>
+ <item key="sql_catalog_multi_schema" type="int">
+  <value>1</value>
+ </item>
+</catalog_method>

product/ERP5/bootstrap/erp5_mysql_innodb_catalog/CatalogMethodTemplateItem/portal_catalog/erp5_mysql_innodb/z_get_table_schema.sql

+SELECT
+  TABLE_NAME, COLUMN_NAME
+FROM
+  information_schema.COLUMNS
+WHERE
+  TABLE_SCHEMA=DATABASE()
\ No newline at end of file

product/ERP5/bootstrap/erp5_mysql_innodb_catalog/CatalogMethodTemplateItem/portal_catalog/erp5_mysql_innodb/z_get_table_schema.xml

+<?xml version="1.0"?>
+<ZopeData>
+  <record id="1" aka="AAAAAAAAAAE=">
+    <pickle>
+      <global name="SQL" module="Products.ZSQLMethods.SQL"/>
+    </pickle>
+    <pickle>
+      <dictionary>
+        <item>
+            <key> <string>arguments_src</string> </key>
+            <value> <string></string> </value>
+        </item>
+        <item>
+            <key> <string>connection_id</string> </key>
+            <value> <string>erp5_sql_connection</string> </value>
+        </item>
+        <item>
+            <key> <string>id</string> </key>
+            <value> <string>z_get_table_schema</string> </value>
+        </item>
+        <item>
+            <key> <string>title</string> </key>
+            <value> <string></string> </value>
+        </item>
+      </dictionary>
+    </pickle>
+  </record>
+</ZopeData>

product/ERP5/bootstrap/erp5_mysql_innodb_catalog/bt/template_catalog_method_id_list

@@ -69,6 +69,7 @@ erp5_mysql_innodb/z_create_versioning
 erp5_mysql_innodb/z_delete_recorded_object_list
 erp5_mysql_innodb/z_delete_translation_list
 erp5_mysql_innodb/z_delete_uid
+erp5_mysql_innodb/z_get_table_schema
 erp5_mysql_innodb/z_getitem_by_path
 erp5_mysql_innodb/z_getitem_by_uid
 erp5_mysql_innodb/z_portal_ids_commit

product/ZSQLCatalog/SQLCatalog.py

@@ -1085,15 +1085,19 @@ class Catalog(Folder,
   @transactional_cache_decorator('SQLCatalog._getCatalogSchema')
   def _getCatalogSchema(self):
     method = getattr(self, self.sql_catalog_multi_schema, None)
+    result = {}
     if method is None:
       # BBB: deprecated
+      warnings.warn("The usage of sql_catalog_schema is much slower. "
+              "than sql_catalog_multi_schema. It makes many SQL queries "
+              "instead of one",
+              DeprecationWarning)
       method_name = self.sql_catalog_schema
       try:
         method = getattr(self, method_name)
       except AttributeError:
         return {}
-      result = {}
-      for table in table_list:
+      for table in self.getCatalogSearchTableIds():
         try:
           result[table] = [c.Field for c in method(table=table)]
         except (ConflictError, DatabaseError):
@@ -1102,7 +1106,6 @@ class Catalog(Folder,
           LOG('SQLCatalog', WARNING, '_getCatalogSchema failed with the method %s'
             % method_name, error=sys.exc_info())
       return result
-    result = {}
     for row in method():
       result.setdefault(row.TABLE_NAME, []).append(row.COLUMN_NAME)
     return result