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|
\set VERBOSITY terse
-- predictability
SET synchronous_commit = on;
CREATE TABLE xpto (a SERIAL PRIMARY KEY, b text);
SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'wal2json');
?column?
----------
init
(1 row)
INSERT INTO xpto (b) VALUES('john');
INSERT INTO xpto (b) VALUES('smith');
INSERT INTO xpto (b) VALUES('robert');
BEGIN;
INSERT INTO xpto (b) VALUES('marie');
SAVEPOINT sp1;
INSERT INTO xpto (b) VALUES('ernesto');
SAVEPOINT sp2;
INSERT INTO xpto (b) VALUES('peter'); -- discard
SAVEPOINT sp3;
INSERT INTO xpto (b) VALUES('albert'); -- discard
ROLLBACK TO SAVEPOINT sp2;
RELEASE SAVEPOINT sp1;
INSERT INTO xpto (b) VALUES('francisco');
END;
SELECT data FROM pg_logical_slot_get_changes('regression_slot', NULL, NULL, 'format-version', '1', 'pretty-print', '1', 'include-typmod', '0');
data
----------------------------------------------------------
{ +
"change": [ +
{ +
"kind": "insert", +
"schema": "public", +
"table": "xpto", +
"columnnames": ["a", "b"], +
"columntypes": ["int4", "text"],+
"columnvalues": [1, "john"] +
} +
] +
}
{ +
"change": [ +
{ +
"kind": "insert", +
"schema": "public", +
"table": "xpto", +
"columnnames": ["a", "b"], +
"columntypes": ["int4", "text"],+
"columnvalues": [2, "smith"] +
} +
] +
}
{ +
"change": [ +
{ +
"kind": "insert", +
"schema": "public", +
"table": "xpto", +
"columnnames": ["a", "b"], +
"columntypes": ["int4", "text"],+
"columnvalues": [3, "robert"] +
} +
] +
}
{ +
"change": [ +
{ +
"kind": "insert", +
"schema": "public", +
"table": "xpto", +
"columnnames": ["a", "b"], +
"columntypes": ["int4", "text"],+
"columnvalues": [4, "marie"] +
} +
,{ +
"kind": "insert", +
"schema": "public", +
"table": "xpto", +
"columnnames": ["a", "b"], +
"columntypes": ["int4", "text"],+
"columnvalues": [5, "ernesto"] +
} +
,{ +
"kind": "insert", +
"schema": "public", +
"table": "xpto", +
"columnnames": ["a", "b"], +
"columntypes": ["int4", "text"],+
"columnvalues": [8, "francisco"]+
} +
] +
}
(4 rows)
SELECT 'stop' FROM pg_drop_replication_slot('regression_slot');
?column?
----------
stop
(1 row)
|
