addeed greatest sql function that supports postgres and sqlite

lbry/blockchain/sync.py

@@ -18,6 +18,7 @@ from lbry.db.sync import (
     condition_spent_claims, condition_spent_supports,
     select_missing_supports, process_claim_changes
 )
+from lbry.db.utils import greatest
 from lbry.schema.url import normalize_name
 
 from .lbrycrd import Lbrycrd
@@ -368,7 +369,7 @@ def process_metadata(starting_height: int, ending_height: int, initial_sync: boo
                                 [(Claim.c.claim_hash == takeover['claim_hash'], takeover['height'])],
                                 else_=None
                             ),
-                            activation_height=func.min(Claim.c.activation_height, takeover['height']),
+                            activation_height=greatest(Claim.c.activation_height, takeover['height']),
                         )
                     )
                     p.ctx.execute(update_claims)

lbry/console.py

@@ -100,6 +100,11 @@ class Advanced(Basic):
         if event == "save" and d['step'] == d['total']:
             bar.close()
 
+    def update_other_bars(self, e, d):
+        bar = self.get_or_create_bar(e, e, d['unit'], d['total'], leave=True)
+        diff = d['step']-bar.last_print_n
+        bar.update(diff)
+
     def on_sync_progress(self, event):
         e, d = event['event'], event.get('data', {})
         if e.endswith("start"):
@@ -110,3 +115,5 @@ class Advanced(Basic):
             self.update_sync_block_bars("read", d)
         elif e.endswith("block.save"):
             self.update_sync_block_bars("save", d)
+        else:
+            self.update_other_bars(e, d)

lbry/db/query_context.py

@@ -463,7 +463,7 @@ class BulkLoader:
         if claim.is_signed:
             claim_record['channel_hash'] = claim.signing_channel_hash
             claim_record['signature'] = txo.get_encoded_signature()
-            claim_record['signature_digest'] = txo.get_signature_digest(None)
+            claim_record['signature_digest'] = txo.get_signature_digest(self.ledger)
 
         tags = [
             {'claim_hash': claim_hash, 'tag': tag} for tag in clean_tags(claim.message.tags)

lbry/db/utils.py

@@ -2,7 +2,9 @@ from itertools import islice
 from typing import List, Union
 
 from sqlalchemy import text, and_
-from sqlalchemy.sql.expression import Select
+from sqlalchemy.sql.expression import Select, FunctionElement
+from sqlalchemy.types import Numeric
+from sqlalchemy.ext.compiler import compiles
 try:
     from sqlalchemy.dialects.postgresql import insert as pg_insert  # pylint: disable=unused-import
 except ImportError:
@@ -11,6 +13,21 @@ except ImportError:
 from .tables import AccountAddress
 
 
+class greatest(FunctionElement):
+    type = Numeric()
+    name = 'greatest'
+
+
+@compiles(greatest)
+def default_greatest(element, compiler, **kw):
+    return "greatest(%s)" % compiler.process(element.clauses, **kw)
+
+
+@compiles(greatest, 'sqlite')
+def sqlite_greatest(element, compiler, **kw):
+    return "max(%s)" % compiler.process(element.clauses, **kw)
+
+
 def chunk(rows, step):
     it, total = iter(rows), len(rows)
     for _ in range(0, total, step):