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Add parameter include-column-positions
This parameter is useful to detect schema changes (since attnum are
numbered from 1 up). Both formats (1 and 2) are supported although
element names are different ("columnpositions" for format 1 and
"position" for format 2). Default is false.
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,88 @@ | ||
| \set VERBOSITY terse | ||
| -- predictability | ||
| SET synchronous_commit = on; | ||
| CREATE TABLE w2j_position (a integer, b integer, primary key(a)); | ||
| SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'wal2json'); | ||
| ?column? | ||
| ---------- | ||
| init | ||
| (1 row) | ||
|
|
||
| INSERT INTO w2j_position (a, b) VALUES(1,2); | ||
| UPDATE w2j_position SET b = 3 WHERE a = 1; | ||
| ALTER TABLE w2j_position ADD COLUMN c integer; | ||
| ALTER TABLE w2j_position DROP COLUMN b; | ||
| INSERT INTO w2j_position (a, c) VALUES(5,6); | ||
| UPDATE w2j_position SET c = 7 WHERE a = 5; | ||
| -- without include-column-position parameter | ||
| SELECT data FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'format-version', '1'); | ||
| data | ||
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ||
| {"change":[{"kind":"insert","schema":"public","table":"w2j_position","columnnames":["a","b"],"columntypes":["integer","integer"],"columnvalues":[1,2]}]} | ||
| {"change":[{"kind":"update","schema":"public","table":"w2j_position","columnnames":["a","b"],"columntypes":["integer","integer"],"columnvalues":[1,3],"oldkeys":{"keynames":["a"],"keytypes":["integer"],"keyvalues":[1]}}]} | ||
| {"change":[]} | ||
| {"change":[]} | ||
| {"change":[{"kind":"insert","schema":"public","table":"w2j_position","columnnames":["a","c"],"columntypes":["integer","integer"],"columnvalues":[5,6]}]} | ||
| {"change":[{"kind":"update","schema":"public","table":"w2j_position","columnnames":["a","c"],"columntypes":["integer","integer"],"columnvalues":[5,7],"oldkeys":{"keynames":["a"],"keytypes":["integer"],"keyvalues":[5]}}]} | ||
| (6 rows) | ||
|
|
||
| SELECT data FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'format-version', '2'); | ||
| data | ||
| ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | ||
| {"action":"B"} | ||
| {"action":"I","schema":"public","table":"w2j_position","columns":[{"name":"a","type":"integer","value":1},{"name":"b","type":"integer","value":2}]} | ||
| {"action":"C"} | ||
| {"action":"B"} | ||
| {"action":"U","schema":"public","table":"w2j_position","columns":[{"name":"a","type":"integer","value":1},{"name":"b","type":"integer","value":3}],"identity":[{"name":"a","type":"integer","value":1}]} | ||
| {"action":"C"} | ||
| {"action":"B"} | ||
| {"action":"C"} | ||
| {"action":"B"} | ||
| {"action":"C"} | ||
| {"action":"B"} | ||
| {"action":"I","schema":"public","table":"w2j_position","columns":[{"name":"a","type":"integer","value":5},{"name":"c","type":"integer","value":6}]} | ||
| {"action":"C"} | ||
| {"action":"B"} | ||
| {"action":"U","schema":"public","table":"w2j_position","columns":[{"name":"a","type":"integer","value":5},{"name":"c","type":"integer","value":7}],"identity":[{"name":"a","type":"integer","value":5}]} | ||
| {"action":"C"} | ||
| (16 rows) | ||
|
|
||
| -- with include-column-position parameter | ||
| SELECT data FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'format-version', '1', 'include-column-positions', '1'); | ||
| data | ||
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ||
| {"change":[{"kind":"insert","schema":"public","table":"w2j_position","columnnames":["a","b"],"columntypes":["integer","integer"],"columnpositions":[1,2],"columnvalues":[1,2]}]} | ||
| {"change":[{"kind":"update","schema":"public","table":"w2j_position","columnnames":["a","b"],"columntypes":["integer","integer"],"columnpositions":[1,2],"columnvalues":[1,3],"oldkeys":{"keynames":["a"],"keytypes":["integer"],"keyvalues":[1]}}]} | ||
| {"change":[]} | ||
| {"change":[]} | ||
| {"change":[{"kind":"insert","schema":"public","table":"w2j_position","columnnames":["a","c"],"columntypes":["integer","integer"],"columnpositions":[1,3],"columnvalues":[5,6]}]} | ||
| {"change":[{"kind":"update","schema":"public","table":"w2j_position","columnnames":["a","c"],"columntypes":["integer","integer"],"columnpositions":[1,3],"columnvalues":[5,7],"oldkeys":{"keynames":["a"],"keytypes":["integer"],"keyvalues":[5]}}]} | ||
| (6 rows) | ||
|
|
||
| SELECT data FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'format-version', '2', 'include-column-positions', '1'); | ||
| data | ||
| ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ | ||
| {"action":"B"} | ||
| {"action":"I","schema":"public","table":"w2j_position","columns":[{"name":"a","type":"integer","value":1,"position":1},{"name":"b","type":"integer","value":2,"position":2}]} | ||
| {"action":"C"} | ||
| {"action":"B"} | ||
| {"action":"U","schema":"public","table":"w2j_position","columns":[{"name":"a","type":"integer","value":1,"position":1},{"name":"b","type":"integer","value":3,"position":2}],"identity":[{"name":"a","type":"integer","value":1}]} | ||
| {"action":"C"} | ||
| {"action":"B"} | ||
| {"action":"C"} | ||
| {"action":"B"} | ||
| {"action":"C"} | ||
| {"action":"B"} | ||
| {"action":"I","schema":"public","table":"w2j_position","columns":[{"name":"a","type":"integer","value":5,"position":1},{"name":"c","type":"integer","value":6,"position":3}]} | ||
| {"action":"C"} | ||
| {"action":"B"} | ||
| {"action":"U","schema":"public","table":"w2j_position","columns":[{"name":"a","type":"integer","value":5,"position":1},{"name":"c","type":"integer","value":7,"position":3}],"identity":[{"name":"a","type":"integer","value":5}]} | ||
| {"action":"C"} | ||
| (16 rows) | ||
|
|
||
| SELECT 'stop' FROM pg_drop_replication_slot('regression_slot'); | ||
| ?column? | ||
| ---------- | ||
| stop | ||
| (1 row) | ||
|
|
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,25 @@ | ||
| \set VERBOSITY terse | ||
|
|
||
| -- predictability | ||
| SET synchronous_commit = on; | ||
|
|
||
| CREATE TABLE w2j_position (a integer, b integer, primary key(a)); | ||
|
|
||
| SELECT 'init' FROM pg_create_logical_replication_slot('regression_slot', 'wal2json'); | ||
|
|
||
| INSERT INTO w2j_position (a, b) VALUES(1,2); | ||
| UPDATE w2j_position SET b = 3 WHERE a = 1; | ||
| ALTER TABLE w2j_position ADD COLUMN c integer; | ||
| ALTER TABLE w2j_position DROP COLUMN b; | ||
| INSERT INTO w2j_position (a, c) VALUES(5,6); | ||
| UPDATE w2j_position SET c = 7 WHERE a = 5; | ||
|
|
||
| -- without include-column-position parameter | ||
| SELECT data FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'format-version', '1'); | ||
| SELECT data FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'format-version', '2'); | ||
|
|
||
| -- with include-column-position parameter | ||
| SELECT data FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'format-version', '1', 'include-column-positions', '1'); | ||
| SELECT data FROM pg_logical_slot_peek_changes('regression_slot', NULL, NULL, 'format-version', '2', 'include-column-positions', '1'); | ||
|
|
||
| SELECT 'stop' FROM pg_drop_replication_slot('regression_slot'); |
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