mirror of https://github.com/citusdata/citus.git
49 lines
1.8 KiB
Plaintext
49 lines
1.8 KiB
Plaintext
CREATE TABLE alter_am(i int);
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INSERT INTO alter_am SELECT generate_series(1,1000000);
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SELECT * FROM columnar.options WHERE relation = 'alter_am'::regclass;
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relation | chunk_group_row_limit | stripe_row_limit | compression | compression_level
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---------------------------------------------------------------------
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(0 rows)
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SELECT SUM(i) FROM alter_am;
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sum
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---------------------------------------------------------------------
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500000500000
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(1 row)
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ALTER TABLE alter_am
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SET ACCESS METHOD columnar,
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SET (columnar.compression = pglz, fillfactor = 20);
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SELECT * FROM columnar.options WHERE relation = 'alter_am'::regclass;
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relation | chunk_group_row_limit | stripe_row_limit | compression | compression_level
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---------------------------------------------------------------------
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alter_am | 10000 | 150000 | pglz | 3
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(1 row)
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SELECT SUM(i) FROM alter_am;
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sum
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---------------------------------------------------------------------
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500000500000
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(1 row)
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ALTER TABLE alter_am SET ACCESS METHOD heap;
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-- columnar options should be gone
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SELECT * FROM columnar.options WHERE relation = 'alter_am'::regclass;
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relation | chunk_group_row_limit | stripe_row_limit | compression | compression_level
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---------------------------------------------------------------------
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(0 rows)
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SELECT SUM(i) FROM alter_am;
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sum
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---------------------------------------------------------------------
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500000500000
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(1 row)
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-- error: setting columnar options must happen after converting to columnar
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ALTER TABLE alter_am
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SET (columnar.stripe_row_limit = 1111),
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SET ACCESS METHOD columnar;
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ERROR: ALTER TABLE cannot alter the access method after altering storage parameters
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HINT: Specify SET ACCESS METHOD before storage parameters, or use separate ALTER TABLE commands.
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DROP TABLE alter_am;
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