Parameter in offset expression in LAG, LEAD, NTH_VALUE window functions
requires explicit cast to BIGINT or INTEGER
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Key: CORE-6421
URL: http://tracker.firebirdsql.org/browse/CORE-6421
Project: Firebird Core
Issue Type: Bug
Components: Engine
Affects Versions: 3.0.6, 4.0 Beta 2, 3.0.5, 4.0 Beta 1, 3.0.4, 3.0.3, 4.0
Alpha 1, 3.0.2, 3.0.1, 3.0.0
Environment: Firebird-4.0.0.2228-0_x64 on Windows 10
Firebird-3.0.5.33220-0_x64 on Windows 10
Reporter: Mark Rotteveel
When using a parameter in LAG, LEAD or NTH_VALUE window functions, Firebird
returns the error "Dynamic SQL Error; SQL error code = -804; Data type unknown
[SQLState:HY004, ISC error code:335544573]"
For example:
select rdb$relation_name, lag(rdb$relation_name, ?) over (order by
rdb$relation_name) from rdb$relations
The workaround is to add an explicit cast:
select rdb$relation_name, lag(rdb$relation_name, cast(? as bigint)) over (order
by rdb$relation_name) from rdb$relations
The same applies to LEAD and NTH_VALUE.
Firebird should identify the parameter as BIGINT.
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