Change transfers trace address to ARRAY

alembic/versions/5427d62a2cc0_change_transfers_trace_address_to_array.py

@@ -0,0 +1,47 @@
+"""Change transfers trace address to ARRAY
+
+Revision ID: 5427d62a2cc0
+Revises: d540242ae368
+Create Date: 2021-11-19 13:25:11.252774
+
+"""
+import sqlalchemy as sa
+from alembic import op
+
+
+# revision identifiers, used by Alembic.
+revision = "5427d62a2cc0"
+down_revision = "d540242ae368"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    op.drop_constraint("transfers_pkey", "transfers")
+    op.alter_column(
+        "transfers",
+        "trace_address",
+        type_=sa.ARRAY(sa.Integer),
+        nullable=False,
+        postgresql_using="trace_address::int[]",
+    )
+    op.create_primary_key(
+        "transfers_pkey",
+        "transfers",
+        ["block_number", "transaction_hash", "trace_address"],
+    )
+
+
+def downgrade():
+    op.drop_constraint("transfers_pkey", "transfers")
+    op.alter_column(
+        "transfers",
+        "trace_address",
+        type_=sa.String(256),
+        nullable=False,
+    )
+    op.create_primary_key(
+        "transfers_pkey",
+        "transfers",
+        ["block_number", "transaction_hash", "trace_address"],
+    )