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remove (nearly) duplicate description
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docs/en/sql-reference/functions/tuple-functions.md
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@ -22,7 +22,7 @@ tuple(x, y, …)
## tupleElement {#tupleelement}
A function that allows getting a column from a tuple.
‘N’ is the column index, starting from 1. N must be a constant. ‘N’ must be a constant. ‘N’ must be a strict postive integer no greater than the size of the tuple.
‘N’ is the column index, starting from 1. ‘N’ must be a constant. ‘N’ must be a strict postive integer no greater than the size of the tuple.
There is no cost to execute the function.
The function implements the operator `x.N`.