html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,issue,performed_via_github_app
https://github.com/simonw/sqlite-utils/issues/103#issuecomment-622587177,https://api.github.com/repos/simonw/sqlite-utils/issues/103,622587177,MDEyOklzc3VlQ29tbWVudDYyMjU4NzE3Nw==,9599,2020-05-01T22:07:51Z,2020-05-01T22:07:51Z,OWNER,"This is my failed attempt to recreate the bug (plus some extra debugging output):
```diff
 % git diff
diff --git a/sqlite_utils/db.py b/sqlite_utils/db.py
index dd49d5c..ea42aea 100644
--- a/sqlite_utils/db.py
+++ b/sqlite_utils/db.py
@@ -1013,7 +1013,11 @@ class Table(Queryable):
         assert (
             num_columns <= SQLITE_MAX_VARS
         ), ""Rows can have a maximum of {} columns"".format(SQLITE_MAX_VARS)
+        print(""default batch_size = "", batch_size)
         batch_size = max(1, min(batch_size, SQLITE_MAX_VARS // num_columns))
+        print(""new batch_size = {},num_columns = {}, MAX_VARS // num_columns = {}"".format(
+            batch_size, num_columns, SQLITE_MAX_VARS // num_columns
+        ))
         self.last_rowid = None
         self.last_pk = None
         for chunk in chunks(itertools.chain([first_record], records), batch_size):
@@ -1124,6 +1128,9 @@ class Table(Queryable):
                 )
                 flat_values = list(itertools.chain(*values))
                 queries_and_params = [(sql, flat_values)]
+                print(sql.count(""?""), len(flat_values))
+
+            # print(json.dumps(queries_and_params, indent=4))
 
             with self.db.conn:
                 for query, params in queries_and_params:
diff --git a/tests/test_create.py b/tests/test_create.py
index 5290cd8..52940df 100644
--- a/tests/test_create.py
+++ b/tests/test_create.py
@@ -853,3 +853,33 @@ def test_create_with_nested_bytes(fresh_db):
     record = {""id"": 1, ""data"": {""foo"": b""bytes""}}
     fresh_db[""t""].insert(record)
     assert [{""id"": 1, ""data"": '{""foo"": ""b\'bytes\'""}'}] == list(fresh_db[""t""].rows)
+
+
+def test_create_throws_useful_error_with_increasing_number_of_columns(fresh_db):
+    # https://github.com/simonw/sqlite-utils/issues/103
+    def rows():
+        yield {""name"": 0}
+        for i in range(1, 1001):
+            yield {
+                ""name"": i,
+                ""age"": i,
+                ""size"": i,
+                ""name2"": i,
+                ""age2"": i,
+                ""size2"": i,
+                ""name3"": i,
+                ""age3"": i,
+                ""size3"": i,
+                ""name4"": i,
+                ""age4"": i,
+                ""size4"": i,
+                ""name5"": i,
+                ""age5"": i,
+                ""size5"": i,
+                ""name6"": i,
+                ""age6"": i,
+                ""size6"": i,
+            }
+
+    fresh_db[""t""].insert_all(rows())
+    assert 1001 == fresh_db[""t""].count
```","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",610517472,