From d54d330c6633362aad2ff68becf00247581914d4 Mon Sep 17 00:00:00 2001
From: Nikita Reznikov <nikita.reznikov.live@mail.ru>
Date: Tue, 17 Dec 2024 22:05:37 +0300
Subject: [PATCH] [#439] Add support of ISO8601 timestamp strings for
 DateTime64 column type

---
 clickhouse_connect/datatypes/temporal.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/clickhouse_connect/datatypes/temporal.py b/clickhouse_connect/datatypes/temporal.py
index 39bf0c0..4db5cd7 100644
--- a/clickhouse_connect/datatypes/temporal.py
+++ b/clickhouse_connect/datatypes/temporal.py
@@ -202,6 +202,18 @@ def _write_column_binary(self, column: Union[Sequence, MutableSequence], dest: b
         if isinstance(first, int) or self.write_format(ctx) == 'int':
             if self.nullable:
                 column = [x if x else 0 for x in column]
+        elif isinstance(first, str) or self.write_format(ctx) == 'str':
+            original_column = column
+            column = []
+
+            for x in original_column:
+                if not x and self.nullable:
+                    v = 0
+                else:
+                    dt = datetime.fromisoformat(x)
+                    v = ((int(dt.timestamp()) * 1000000 + dt.microsecond) * self.prec) // 1000000
+                
+                column.append(v)
         else:
             prec = self.prec
             if self.nullable: