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Support XA distributed transactions in CockroachDB #22329
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The spreadsheet we discussed is unwieldy - hard to edit and impossible to keep up to date. If we write down blacklists in code, then we can use an approach like this to always have an up to date aggregation. So far it seems like there's just a lot of unknowns to categorize still. The output today: ``` === RUN TestBlacklists 648: unknown (unknown) 493: cockroachdb#5807 (sql: Add support for TEMP tables) 151: cockroachdb#17511 (sql: support stored procedures) 86: cockroachdb#26097 (sql: make TIMETZ more pg-compatible) 56: cockroachdb#10735 (sql: support SQL savepoints) 55: cockroachdb#32552 (multi-dim arrays) 55: cockroachdb#26508 (sql: restricted DDL / DML inside transactions) 52: cockroachdb#32565 (sql: support optional TIME precision) 39: cockroachdb#243 (roadmap: Blob storage) 33: cockroachdb#26725 (sql: support postgres' API to handle blob storage (incl lo_creat, lo_from_bytea)) 31: cockroachdb#27793 (sql: support custom/user-defined base scalar (primitive) types) 24: cockroachdb#12123 (sql: Can't drop and replace a table within a transaction) 24: cockroachdb#26443 (sql: support user-defined schemas between database and table) 20: cockroachdb#21286 (sql: Add support for geometric types) 18: cockroachdb#6583 (sql: explicit lock syntax (SELECT FOR {SHARE,UPDATE} {skip locked,nowait})) 17: cockroachdb#22329 (Support XA distributed transactions in CockroachDB) 16: cockroachdb#24062 (sql: 32 bit SERIAL type) 16: cockroachdb#30352 (roadmap:when CockroachDB will support cursor?) 12: cockroachdb#27791 (sql: support RANGE types) 8: cockroachdb#40195 (pgwire: multiple active result sets (portals) not supported) 8: cockroachdb#6130 (sql: add support for key watches with notifications of changes) 5: Expected Failure (unknown) 5: cockroachdb#23468 (sql: support sql arrays of JSONB) 5: cockroachdb#40854 (sql: set application_name from connection string) 4: cockroachdb#35879 (sql: `default_transaction_read_only` should also accept 'on' and 'off') 4: cockroachdb#32610 (sql: can't insert self reference) 4: cockroachdb#40205 (sql: add non-trivial implementations of FOR UPDATE, FOR NO KEY UPDATE, FOR SHARE, FOR NO KEY SHARE) 4: cockroachdb#35897 (sql: unknown function: pg_terminate_backend()) 4: cockroachdb#4035 (sql/pgwire: missing support for row count limits in pgwire) 3: cockroachdb#27796 (sql: support user-defined DOMAIN types) 3: cockroachdb#3781 (sql: Add Data Type Formatting Functions) 3: cockroachdb#40476 (sql: support `FOR {UPDATE,SHARE} {SKIP LOCKED,NOWAIT}`) 3: cockroachdb#35882 (sql: support other character sets) 2: cockroachdb#10028 (sql: Support view queries with star expansions) 2: cockroachdb#35807 (sql: INTERVAL output doesn't match PG) 2: cockroachdb#35902 (sql: large object support) 2: cockroachdb#40474 (sql: support `SELECT ... FOR UPDATE OF` syntax) 1: cockroachdb#18846 (sql: Support CIDR column type) 1: cockroachdb#9682 (sql: implement computed indexes) 1: cockroachdb#31632 (sql: FK options (deferrable, etc)) 1: cockroachdb#24897 (sql: CREATE OR REPLACE VIEW) 1: pass? (unknown) 1: cockroachdb#36215 (sql: enable setting standard_conforming_strings to off) 1: cockroachdb#32562 (sql: support SET LOCAL and txn-scoped session variable changes) 1: cockroachdb#36116 (sql: psychopg: investigate how `'infinity'::timestamp` is presented) 1: cockroachdb#26732 (sql: support the binary operator: <int> / <float>) 1: cockroachdb#23299 (sql: support coercing string literals to arrays) 1: cockroachdb#36115 (sql: psychopg: investigate if datetimetz is being returned instead of datetime) 1: cockroachdb#26925 (sql: make the CockroachDB integer types more compatible with postgres) 1: cockroachdb#21085 (sql: WITH RECURSIVE (recursive common table expressions)) 1: cockroachdb#36179 (sql: implicity convert date to timestamp) 1: cockroachdb#36118 (sql: Cannot parse '24:00' as type time) 1: cockroachdb#31708 (sql: support current_time) ``` Release justification: non-production change Release note: None
The spreadsheet we discussed is unwieldy - hard to edit and impossible to keep up to date. If we write down blacklists in code, then we can use an approach like this to always have an up to date aggregation. So far it seems like there's just a lot of unknowns to categorize still. The output today: ``` === RUN TestBlacklists 648: unknown (unknown) 493: cockroachdb#5807 (sql: Add support for TEMP tables) 151: cockroachdb#17511 (sql: support stored procedures) 86: cockroachdb#26097 (sql: make TIMETZ more pg-compatible) 56: cockroachdb#10735 (sql: support SQL savepoints) 55: cockroachdb#32552 (multi-dim arrays) 55: cockroachdb#26508 (sql: restricted DDL / DML inside transactions) 52: cockroachdb#32565 (sql: support optional TIME precision) 39: cockroachdb#243 (roadmap: Blob storage) 33: cockroachdb#26725 (sql: support postgres' API to handle blob storage (incl lo_creat, lo_from_bytea)) 31: cockroachdb#27793 (sql: support custom/user-defined base scalar (primitive) types) 24: cockroachdb#12123 (sql: Can't drop and replace a table within a transaction) 24: cockroachdb#26443 (sql: support user-defined schemas between database and table) 20: cockroachdb#21286 (sql: Add support for geometric types) 18: cockroachdb#6583 (sql: explicit lock syntax (SELECT FOR {SHARE,UPDATE} {skip locked,nowait})) 17: cockroachdb#22329 (Support XA distributed transactions in CockroachDB) 16: cockroachdb#24062 (sql: 32 bit SERIAL type) 16: cockroachdb#30352 (roadmap:when CockroachDB will support cursor?) 12: cockroachdb#27791 (sql: support RANGE types) 8: cockroachdb#40195 (pgwire: multiple active result sets (portals) not supported) 8: cockroachdb#6130 (sql: add support for key watches with notifications of changes) 5: Expected Failure (unknown) 5: cockroachdb#23468 (sql: support sql arrays of JSONB) 5: cockroachdb#40854 (sql: set application_name from connection string) 4: cockroachdb#35879 (sql: `default_transaction_read_only` should also accept 'on' and 'off') 4: cockroachdb#32610 (sql: can't insert self reference) 4: cockroachdb#40205 (sql: add non-trivial implementations of FOR UPDATE, FOR NO KEY UPDATE, FOR SHARE, FOR NO KEY SHARE) 4: cockroachdb#35897 (sql: unknown function: pg_terminate_backend()) 4: cockroachdb#4035 (sql/pgwire: missing support for row count limits in pgwire) 3: cockroachdb#27796 (sql: support user-defined DOMAIN types) 3: cockroachdb#3781 (sql: Add Data Type Formatting Functions) 3: cockroachdb#40476 (sql: support `FOR {UPDATE,SHARE} {SKIP LOCKED,NOWAIT}`) 3: cockroachdb#35882 (sql: support other character sets) 2: cockroachdb#10028 (sql: Support view queries with star expansions) 2: cockroachdb#35807 (sql: INTERVAL output doesn't match PG) 2: cockroachdb#35902 (sql: large object support) 2: cockroachdb#40474 (sql: support `SELECT ... FOR UPDATE OF` syntax) 1: cockroachdb#18846 (sql: Support CIDR column type) 1: cockroachdb#9682 (sql: implement computed indexes) 1: cockroachdb#31632 (sql: FK options (deferrable, etc)) 1: cockroachdb#24897 (sql: CREATE OR REPLACE VIEW) 1: pass? (unknown) 1: cockroachdb#36215 (sql: enable setting standard_conforming_strings to off) 1: cockroachdb#32562 (sql: support SET LOCAL and txn-scoped session variable changes) 1: cockroachdb#36116 (sql: psychopg: investigate how `'infinity'::timestamp` is presented) 1: cockroachdb#26732 (sql: support the binary operator: <int> / <float>) 1: cockroachdb#23299 (sql: support coercing string literals to arrays) 1: cockroachdb#36115 (sql: psychopg: investigate if datetimetz is being returned instead of datetime) 1: cockroachdb#26925 (sql: make the CockroachDB integer types more compatible with postgres) 1: cockroachdb#21085 (sql: WITH RECURSIVE (recursive common table expressions)) 1: cockroachdb#36179 (sql: implicity convert date to timestamp) 1: cockroachdb#36118 (sql: Cannot parse '24:00' as type time) 1: cockroachdb#31708 (sql: support current_time) ``` Release justification: non-production change Release note: None
41252: roachtest: add test that aggregates orm blacklist failures r=jordanlewis a=jordanlewis The spreadsheet we discussed is unwieldy - hard to edit and impossible to keep up to date. If we write down blacklists in code, then we can use an approach like this to always have an up to date aggregation. So far it seems like there's just a lot of unknowns to categorize still. The output today: ``` === RUN TestBlacklists 648: unknown (unknown) 493: #5807 (sql: Add support for TEMP tables) 151: #17511 (sql: support stored procedures) 86: #26097 (sql: make TIMETZ more pg-compatible) 56: #10735 (sql: support SQL savepoints) 55: #32552 (multi-dim arrays) 55: #26508 (sql: restricted DDL / DML inside transactions) 52: #32565 (sql: support optional TIME precision) 39: #243 (roadmap: Blob storage) 33: #26725 (sql: support postgres' API to handle blob storage (incl lo_creat, lo_from_bytea)) 31: #27793 (sql: support custom/user-defined base scalar (primitive) types) 24: #12123 (sql: Can't drop and replace a table within a transaction) 24: #26443 (sql: support user-defined schemas between database and table) 20: #21286 (sql: Add support for geometric types) 18: #6583 (sql: explicit lock syntax (SELECT FOR {SHARE,UPDATE} {skip locked,nowait})) 17: #22329 (Support XA distributed transactions in CockroachDB) 16: #24062 (sql: 32 bit SERIAL type) 16: #30352 (roadmap:when CockroachDB will support cursor?) 12: #27791 (sql: support RANGE types) 8: #40195 (pgwire: multiple active result sets (portals) not supported) 8: #6130 (sql: add support for key watches with notifications of changes) 5: Expected Failure (unknown) 5: #23468 (sql: support sql arrays of JSONB) 5: #40854 (sql: set application_name from connection string) 4: #35879 (sql: `default_transaction_read_only` should also accept 'on' and 'off') 4: #32610 (sql: can't insert self reference) 4: #40205 (sql: add non-trivial implementations of FOR UPDATE, FOR NO KEY UPDATE, FOR SHARE, FOR NO KEY SHARE) 4: #35897 (sql: unknown function: pg_terminate_backend()) 4: #4035 (sql/pgwire: missing support for row count limits in pgwire) 3: #27796 (sql: support user-defined DOMAIN types) 3: #3781 (sql: Add Data Type Formatting Functions) 3: #40476 (sql: support `FOR {UPDATE,SHARE} {SKIP LOCKED,NOWAIT}`) 3: #35882 (sql: support other character sets) 2: #10028 (sql: Support view queries with star expansions) 2: #35807 (sql: INTERVAL output doesn't match PG) 2: #35902 (sql: large object support) 2: #40474 (sql: support `SELECT ... FOR UPDATE OF` syntax) 1: #18846 (sql: Support CIDR column type) 1: #9682 (sql: implement computed indexes) 1: #31632 (sql: FK options (deferrable, etc)) 1: #24897 (sql: CREATE OR REPLACE VIEW) 1: pass? (unknown) 1: #36215 (sql: enable setting standard_conforming_strings to off) 1: #32562 (sql: support SET LOCAL and txn-scoped session variable changes) 1: #36116 (sql: psychopg: investigate how `'infinity'::timestamp` is presented) 1: #26732 (sql: support the binary operator: <int> / <float>) 1: #23299 (sql: support coercing string literals to arrays) 1: #36115 (sql: psychopg: investigate if datetimetz is being returned instead of datetime) 1: #26925 (sql: make the CockroachDB integer types more compatible with postgres) 1: #21085 (sql: WITH RECURSIVE (recursive common table expressions)) 1: #36179 (sql: implicity convert date to timestamp) 1: #36118 (sql: Cannot parse '24:00' as type time) 1: #31708 (sql: support current_time) ``` Release justification: non-production change Release note: None Co-authored-by: Jordan Lewis <jordanthelewis@gmail.com>
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While looking if I 'could' use CockroachDB instead of PostgreSQL, I found out this was not yet implemented. It's a big deal. Without it you end-up with convoluted solution like -> https://senoritadeveloper.medium.com/microservices-transaction-management-patterns-46ef2df9a9c4 This would probably help thinking about how to test it -> https://docs.hazelcast.com/hazelcast/5.2/pipelines/xa |
X/Open XA is a standard for distributed transaction processing across multiple database engines. This is used in enterprise scenarios where data is spread across different technologies but applications need to preserve ACID semantics for transactions that span multiple database engines.
PostgreSQL supports XA transactions by a combination of two mechanisms:
PREPARE TRANSACTION
statement which enables a SQL transaction manager (TM) to "take over" transaction managementFor enterprise users CockroachDB should provide a path towards XA compatibility:
Strict compatibility with pg's
PREPARE TRANSACTION
would enable providing a XA API via pg's own ODBC driver.cc @awoods187 for prioritization. cc @bdarnell for technical insights.
Also mentioned here: https://forum.cockroachlabs.com/t/xa-distributed-transactions/1336
Jira issue: CRDB-5863
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