S02010

Error Code

S02010

Error Message

All columns must be of the same length. RefId:S02010

Probable Causes

DolphinDB enforces that all columns in a table must have equal lengths. This error may occur in the following cases:

1. When constructing a table by passing vectors of mismatched lengths, e.g., t = table(1..10 as id, rand(1..10, 100000) as col2).

2. When executing SQL queries where the SELECT columns produce results of different lengths, e.g., select id, distinct(val) from t.

Solutions

1. Verify that the columns being used to construct the table have equal lengths.

   table(1..10 as id, rand(1..10, 100000) as val) 
   ==> table(1..10 as id, rand(1..10, 10) as val)；

2. For SQL queries, confirm that the columns or expressions specified in the SELECT statement will produce results of matching lengths.

   select id, distinct(val) from t 
   ==> select id, val from t；