issues: 517241040
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| id | node_id | number | title | user | state | locked | assignee | milestone | comments | created_at | updated_at | closed_at | author_association | pull_request | body | repo | type | active_lock_reason | performed_via_github_app | reactions | draft | state_reason |
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| 517241040 | MDU6SXNzdWU1MTcyNDEwNDA= | 63 | ensure_index() method | 9599 | closed | 0 | 1 | 2019-11-04T15:51:22Z | 2019-11-04T16:20:36Z | 2019-11-04T16:20:35Z | OWNER | ```python db["table"].ensure_index(["col1", "col2"]) ``` This will do the following: - if the specified table or column does not exist, do nothing - if they exist and already have an index, do nothing - otherwise, create the index I want this for tools like [twitter-to-sqlite search](https://github.com/dogsheep/twitter-to-sqlite/blob/801c0c2daf17d8abce9dcb5d8d610410e7e25dbe/README.md#running-searches) where the `search_runs` table may or not have been created yet but, if it IS created, I want to put an index on the `hash` column. | 140912432 | issue | {"url": "https://api.github.com/repos/simonw/sqlite-utils/issues/63/reactions", "total_count": 0, "+1": 0, "-1": 0, "laugh": 0, "hooray": 0, "confused": 0, "heart": 0, "rocket": 0, "eyes": 0} | completed |