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In Vertica, you can use the BIT_TO_INT() function to convert a Bitstring into an integer. Here's the syntax:
BIT_TO_INT(bitstring)
Where bitstring is the Bitstring you want to convert to an integer.
For example, if you have a Bitstring 1010, you can convert it to an integer using the following query:
SELECT BIT_TO_INT('1010');
This will return an integer value of 10.
Note that the maximum integer value that can be represented by a Bitstring in Vertica is 2147483647 (2^31 - 1). If the Bitstring contains more than 31 bits, you won't be able to convert it to an integer.