Github user dongjoon-hyun commented on the pull request:
https://github.com/apache/tajo/pull/442#issuecomment-85409177
The cache is maintained by approximately LRU manner with 200 size and also
cached item will be expired after 1 hour since last access.
'''
session.setQueryCache(CacheBuilder.newBuilder()
.maximumSize(200)
.expireAfterAccess(1, TimeUnit.HOURS)
.build(new CacheLoader<String, Expr>() {
public Expr load(String sql) throws SQLSyntaxError {
return analyzer.parse(sql);
}
})
);
'''
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