![]() What’s wrong with it?: It’s not in the SQL standard and was really just an alias for interval.ĭoes it still work?: No, this was deprecated as far back as PostgreSQL 7.0 and removed in 8.3. If for any reason you’re using this, you’re *definitely* overdue an upgrade, and have been for many years. This was deprecated back in PostgreSQL 7.0, and totally removed in PostgreSQL 7.3. A year is also considered to be 360 days.ĭoes it still work?: No. Interval can also handle relative time units for example, adding a month to 15th February using interval will give you 15th March, but with abstime it has a fixed notion of a month being 30 days, so will give you 17th March (on a non-leap year). This does take up more space (12 bytes), but it’s range is absolutely huge: ‘-178000000 years’ to ‘+178000000 years’. What to use instead: The SQL standard equivalent of this kind of data type is interval, which PostgreSQL has. It also has a resolution down to the second. Instead the value wraps around, so entering +70 years would result in a value of around -66 years. Does it put ‘invalid’ in the column like abstime? No. Again, this doesn’t error with values higher than this limit. What’s wrong with it?: This stores a date/time offset but only +/- 68 years. It has been removed in version 12 as well. It takes up more space (8 bytes instead of 4), but it has a far wider range: ‘4713 BC’ to ‘294276 AD’ and supports microsecond resolution.ĭoes it still work?: This will still work until version 11, but again, is no longer documented as of PostgreSQL 7.0 and for internal use only. What to use instead: Since abstime supports timezone, the better alternative is using timestamp with time zone (timestamptz). Instead you’ll just see ‘invalid’ as the value when you go to query it. Its behaviour is unfortunately like that of MySQL’s, in that if you insert an invalid value, it won’t fire an error. It also only has a resolution down to the second. What’s wrong with it?: The range this data type provides is limited: ‘’ to ‘’. Despite its name, it supports both date and time. What’s wrong with it?: Not in the SQL standard and they’re no faster than using the ubiquitous char(n).ĭoes it still work?: This will still work until version 11, but it’s no longer documented as of PostgreSQL 7.0 and only intended to be used internally. someone *could* still be using them somewhere. In fact I shouldn’t bother mentioning these, but you never know. These were removed way back in PostgreSQL 6.4. Version 6.4 char2/char4/char8/char16 data typesĭoes it still work?: No. What to use instead: You can use triggers to implement a similar mechanism. being able to query data as it was at another time. What’s wrong with it?: This really dragged performance down and took up a huge amount of storage space. This is ooooold and was last supported back in PostgreSQL 6.1. 10.2 Literal language name case-sensitivityĭoes it still work?: No.9.1 createlang/droplang client applications.8.1 pg_dump/pg_dumpall’s -d and -D options.6.2 adddepend, dbase, dbmirror, fulltextindex, mac, ora2pg and userlock contrib modules.6.1 mSQL-interface and tips contrib modules.2.1 char2/char4/char8/char16 data types.
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