code: def upgrade():
      """Add Precision to ``execution_date`` in ``RenderedTaskInstanceFields`` table for MySQL"""
      conn = op.get_bind()
      if conn.dialect.name == "mysql":
          op.alter_column(
              table_name=TABLE_NAME,
              column_name=COLUMN_NAME,
              type_=mysql.TIMESTAMP(fsp=6),
              nullable=False,
          )
  
imports: from __future__ import annotations
  from alembic import op
  from sqlalchemy.dialects import mysql
label_desc: Use image node_id 1 for calling a global function with example usage: upgrade() without return types