Store the strings, as the TODO said.
This memoization saves 9/10 of running time:
BenchmarkSql-4 (before) 300000 5429 ns/op
BenchmarkSql-4 (after) 3000000 430 ns/op
Change-Id: I4edabff96043620b5af3f5b507ddd75d65b22ff1
This is so configurations using the same database server for many
databases (multiple queues + the index) can all share the same
underlying *sql.DB
Change-Id: Iae7d4835fe9045008709c953e36b729729b1b6f4
Tamás Gulácsi