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Presto Update at Presto meetup: http://eventdots.jp/event/593112
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Presto changes
1.
Presto changes July 19,
2016 : Presto meeup Masahiro Nakagawa
2.
• Teradata starts
Enterprise support • http://www.teradata.jp/products-and-services/ presto-download/ • Airpal • http://airbnb.io/airpal/ • Presto Admin • https://github.com/prestodb/presto-admin • Users: https://github.com/prestodb/presto/wiki/Presto-Users Ecosystem
3.
New DataType • DECIMAL
(v0.145) • VARCHAR(N) (v0.137) • INTEGER (v0.145) • Use only 4 byte unlike 8 byte BIGINT • SMALLINT, TINYINT • FLOAT (v0.149)
4.
New Connectors • System
Connector (v0.100) • BlackHoleConnector (v0.108) • Redis Connector (v0.119) • Tableau Web Connector (v0.126) • New Parquet Reader for Hive (v0.138) • MongoDBConnector (v0.146) • LocalFileConnector (v0.147)
5.
New syntax • CREATE
TABLE (v0.101) • DELETE (v0.107) • TRY (v0.140) • CUBE, ROLLUP, GROUPING SETS (v0.142) • https://prestodb.io/docs/current/sql/ select.html#complex-grouping-operations • EXPLAIN ANALYZE (v0.144)
6.
New features • String
functions assume input is UTF-8 (v0.102) • Transaction support in SQL / Connector (v0.132) • Dynamic split concurrency (v0.139) • non-correlated subquery in aggregation query (v0.142) • colocated join (v0.147) • non-equi outer joins (v0.148)
7.
Execution Planner -
Split Sink Final aggr Exchange Sink Partial aggr Table scan Sink Final aggr Exchange Sink Partial aggr Table scan Output Exchange Split many splits / task = many threads / worker (table scan) 1 split / task = 1 thread / worker Worker 1 Worker 2 1 split / worker = 1 thread / worker
8.
Configuration • node-scheduler.network-topology (v0.129) •
legacy or flat for consider work queue • query.max-cpu-time (v0.143) • Limit CPU usage of a query
9.
Operation • Worker: Graceful
shutdown (v0.128) • resource groups (v0.147) • resources and query queues isolation for various workload • https://prestodb.io/docs/current/admin/resource- groups.html • G1GC is recomended (v0.148)
10.
New function (1) •
String • normalize, lpad, rpad, split_to_map, substring, from_utf8, to_utf8, split • Math • truncate, width_bucket, sign, to_base, from_base, degrees, radians • Array • array_distinct, array_intersect, array_position, array_join, array_min, array_max, slice, element_at, flatten, sequence, array_remove • Map • element_at, map_concat
11.
New function (2) •
Aggregation • map_agg, bool_and, bool_or, array_agg, geometric_mean, map_union, multimap_agg, checksum, histogram, cover_pop, cover_samp, corr, regr_slope, regr_intercept • Binary • md5, sha1, sha256, sha512 • Bitwise • bit_count, bitwise_not, bitswise_and, bitwise_or, bitwise_xor • URL • url_encode, url_decode
12.
New function (3) •
datetime • date_format, date_parse, from_iso8601_timestamp, from_iso8601_date, to_iso8601, year_of_week • Regexp • regexp_split, regexp_extract_all,
13.
Next features • https://github.com/prestodb/presto/wiki/Roadmap •
Prepared statements • New optimizer • Materialized query tables • Spill to disk • HTTP/2 • etc…
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