Oracle SQL error: maximum number of expressions - sql

Question

Could you please help me regarding that issue getting error in Oracle SQL
ORA-01795 maximum number of expressions in a list is 1000
I'm passing value like
and test in (1, 2, 3.....1000)

Answer 1

Try to split your query with multiple in clauses like below
SELECT *
FROM table_name
WHERE test IN (1,2,3,....500)
OR test IN (501, 502, ......1000);

Answer 2

You can try workarounds:
Split single in into several ones:
select ...
from ...
where test in (1, ..., 999) or
test in (1000, ..., 1999) or
...
test in (9000, ..., 9999)
Put values into a (temporary?) table, say TestTable:
select ...
from ...
where test in (select TestField
from TestTable)
Edit: As I can see, the main difficulty is to build such a query. Let's implement it in C#. We are given a collection of ids:
// Test case ids are in [1..43] range
IEnumerable<int> Ids = Enumerable.Range(1, 43);
// Test case: 7, in actual Oracle query you, probably set it to 100 or 1000
int chunkSize = 7;
string fieldName = "test";
string filterText = string.Join(" or " + Environment.NewLine, Ids
.Select((value, index) => new {
value = value,
index = index
})
.GroupBy(item => item.index / chunkSize)
.Select(chunk =>
$"{fieldName} in ({string.Join(", ", chunk.Select(item => item.value))})"));
if (!string.IsNullOrEmpty(filterText))
filterText = $"and \r\n({filterText})";
string sql =
$#"select MyField
from MyTable
where (1 = 1) {filterText}";
Test:
Console.Write(sql);
Outcome:
select MyField
from MyTable
where (1 = 1) and
(test in (1, 2, 3, 4, 5, 6, 7) or
test in (8, 9, 10, 11, 12, 13, 14) or
test in (15, 16, 17, 18, 19, 20, 21) or
test in (22, 23, 24, 25, 26, 27, 28) or
test in (29, 30, 31, 32, 33, 34, 35) or
test in (36, 37, 38, 39, 40, 41, 42) or
test in (43))