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1432377191 I_kwDOCGYnMM5VYFdn 509 `sqlite-utils transform` breaks DEFAULT string values and STRFTIME() kennysong 2199875 closed 0     0 2022-11-02T02:32:23Z 2023-05-08T21:13:38Z 2023-05-08T21:13:38Z NONE  

Very nice library! Our team found sqlite-utils through @simonw's comment on the "Simple declarative schema migration for SQLite" article, and we were excited to use it, but unfortunately sqlite-utils transform seems to break our DB.

Running sqlite-utils transform to modify a column mangles their DEFAULT values:

  • Default string values are wrapped in extra single quotes
  • Function expressions such as STRFTIME() are turned into strings!

Here are steps to reproduce:

Original database

``` $ sqlite3 test.db << EOF CREATE TABLE mytable ( col1 TEXT DEFAULT 'foo', col2 TEXT DEFAULT (STRFTIME('%Y-%m-%d %H:%M:%f', 'NOW')) ) EOF

$ sqlite3 test.db "SELECT sql FROM sqlite_master WHERE name = 'mytable';" CREATE TABLE mytable ( col1 TEXT DEFAULT 'foo', col2 TEXT DEFAULT (STRFTIME('%Y-%m-%d %H:%M:%f', 'NOW')) ) ```

Modified database after sqlite-utils

``` $ sqlite3 test.db "INSERT INTO mytable DEFAULT VALUES; SELECT * FROM mytable;" foo|2022-11-02 02:26:58.038

$ sqlite-utils transform test.db mytable --rename col1 renamedcol1

$ sqlite3 test.db "SELECT sql FROM sqlite_master WHERE name = 'mytable';" CREATE TABLE "mytable" ( [renamedcol1] TEXT DEFAULT '''foo''', [col2] TEXT DEFAULT 'STRFTIME(''%Y-%m-%d %H:%M:%f'', ''NOW'')' )

$ sqlite3 test.db "INSERT INTO mytable DEFAULT VALUES; SELECT * FROM mytable;" foo|2022-11-02 02:26:58.038 'foo'|STRFTIME('%Y-%m-%d %H:%M:%f', 'NOW') ```

(Related: #336)

 sqlite-utils 140912432 issue     
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