Convert block_timestmap from numeric to timestamp

alembic/versions/04b76ab1d2af_change_blocks_timestamp_to_timestamp.py

@@ -0,0 +1,36 @@
+"""Change blocks.timestamp to timestamp
+
+Revision ID: 04b76ab1d2af
+Revises: 2c90b2b8a80b
+Create Date: 2021-11-26 15:31:21.111693
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = "04b76ab1d2af"
+down_revision = "0cef835f7b36"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.alter_column(
+        "blocks",
+        "block_timestamp",
+        type_=sa.TIMESTAMP,
+        nullable=False,
+        postgresql_using="TO_TIMESTAMP(block_timestamp)",
+    )
+
+
+def downgrade():
+    op.alter_column(
+        "blocks",
+        "block_timestamp",
+        type_=sa.Numeric,
+        nullable=False,
+        postgresql_using="extract(epoch FROM block_timestamp)",
+    )