should be it

external/duckdb/test/sql/storage/compression/fsst/fsst_compression_ratio.test_slow

@@ -0,0 +1,87 @@
+# name: test/sql/storage/compression/fsst/fsst_compression_ratio.test_slow
+# description: Assert fsst compression ratio is within reasonable margins
+# group: [fsst]
+
+require no_latest_storage
+
+# load the DB from disk
+load __TEST_DIR__/test_dictionary.db readwrite v1.0.0
+
+require tpch
+
+# First test: detailed compression ratio
+statement ok
+PRAGMA force_compression='fsst'
+
+# Uncompressed size per value: 10 chars + 4 bytes for dict offset = 14
+# Compressed size per values: 2 bytes for 2 symbols (BEEPBOOP) and (-{num}) + 0.25 byte = 2.25 bytes per value
+# Ignoring overhead for symbol table and bitwidth storage, we would expect a ratio of maximally 14/2.25 = 6.22
+
+statement ok
+CREATE TABLE test_compressed AS SELECT concat('BEEPBOOP-', (i%3)::VARCHAR) AS i FROM range(0, 1250000) tbl(i);
+
+statement ok
+checkpoint
+
+query I
+SELECT DISTINCT lower(compression) FROM pragma_storage_info('test_compressed') where segment_type = 'VARCHAR'
+----
+fsst
+
+statement ok
+PRAGMA force_compression='uncompressed'
+
+statement ok
+CREATE TABLE test_uncompressed AS SELECT concat('BEEPBOOP-', (i%3)::VARCHAR) AS i FROM range(0, 1250000) tbl(i);
+
+statement ok
+checkpoint
+
+#mode output_result
+
+statement ok
+select (uncompressed::FLOAT / compressed::FLOAT) as compression_ratio  FROM (
+    select
+        (select count(distinct block_id) from pragma_storage_info('test_compressed') where segment_type in('VARCHAR')) as compressed,
+        (select count(distinct block_id) from pragma_storage_info('test_uncompressed') where segment_type in('VARCHAR')) as uncompressed
+)
+
+# This query keeps a pretty wide margin in compression ratio un purpose to account for possible changes that
+# influence compression ratio.
+query II
+select (uncompressed::FLOAT / compressed::FLOAT) > 5, (uncompressed::FLOAT / compressed::FLOAT) < 6.5  FROM (
+    select
+        (select count(distinct block_id) from pragma_storage_info('test_compressed') where segment_type in('VARCHAR')) as compressed,
+        (select count(distinct block_id) from pragma_storage_info('test_uncompressed') where segment_type in('VARCHAR')) as uncompressed
+)
+----
+True	True
+
+statement ok
+CALL dbgen(sf=0.1)
+
+statement ok
+PRAGMA force_compression='uncompressed'
+
+statement ok
+CREATE TABLE l_comment_uncompressed AS SELECT l_comment FROM lineitem;
+
+statement ok
+checkpoint
+
+statement ok
+PRAGMA force_compression='fsst'
+
+statement ok
+CREATE TABLE l_comment_compressed AS SELECT l_comment FROM lineitem;
+
+statement ok
+checkpoint
+
+# We compress l_comment with roughly ~3x compression ratio with fsst
+statement ok
+select (uncompressed::FLOAT / compressed::FLOAT) > 2.5, (uncompressed::FLOAT / compressed::FLOAT) < 3.5 as compression_ratio  FROM (
+    select
+        (select count(distinct block_id) from pragma_storage_info('l_comment_compressed') where segment_type in('VARCHAR')) as compressed,
+        (select count(distinct block_id) from pragma_storage_info('l_comment_uncompressed') where segment_type in('VARCHAR')) as uncompressed
+)

external/duckdb/test/sql/storage/compression/fsst/fsst_disable_compression.test

@@ -0,0 +1,39 @@
+# name: test/sql/storage/compression/fsst/fsst_disable_compression.test
+# description: Test disabling compresison
+# group: [fsst]
+
+require no_latest_storage
+
+require skip_reload
+
+# load the DB from disk
+load __TEST_DIR__/test_disabled_compression_methods.db readwrite v1.0.0
+
+statement ok
+CREATE TABLE test AS SELECT concat('longprefix', i) FROM range(30000) t(i);
+
+statement ok
+CHECKPOINT
+
+query I
+SELECT DISTINCT compression FROM pragma_storage_info('test') where segment_type = 'VARCHAR';
+----
+FSST
+
+statement ok
+DROP TABLE test
+
+statement ok
+SET disabled_compression_methods='fsst'
+
+# verify FSST is disabled
+statement ok
+CREATE TABLE test AS SELECT concat('longprefix', i) FROM range(30000) t(i);
+
+statement ok
+CHECKPOINT
+
+query I
+SELECT BOOL_OR(compression ILIKE 'fsst%') FROM pragma_storage_info('test')
+----
+false

external/duckdb/test/sql/storage/compression/fsst/fsst_read.test_slow

@@ -0,0 +1,22 @@
+# name: test/sql/storage/compression/fsst/fsst_read.test_slow
+# group: [fsst]
+
+# The database is written with a vector size of 2048.
+require vector_size 2048
+
+unzip data/storage/fsst.db.gz __TEST_DIR__/fsst.db
+
+load __TEST_DIR__/fsst.db readonly
+
+query I
+select count(street) from tbl;
+----
+397527
+
+query I nosort res
+select street from tbl;
+----
+
+query I
+SELECT compression FROM pragma_storage_info('tbl') WHERE segment_type == 'VARCHAR' AND compression != 'FSST';
+----

external/duckdb/test/sql/storage/compression/fsst/fsst_storage_info.test

@@ -0,0 +1,25 @@
+# name: test/sql/storage/compression/fsst/fsst_storage_info.test
+# description: Test storage with fsst compression
+# group: [fsst]
+
+require no_latest_storage
+
+# load the DB from disk
+load __TEST_DIR__/test_dictionary.db readwrite v1.0.0
+
+statement ok
+PRAGMA force_compression = 'fsst'
+
+statement ok
+CREATE TABLE test (a VARCHAR, b VARCHAR);
+
+statement ok
+INSERT INTO test VALUES ('11', '22'), ('11', '22'), ('12', '21'), (NULL, NULL)
+
+statement ok
+CHECKPOINT
+
+query I
+SELECT compression FROM pragma_storage_info('test') WHERE segment_type ILIKE 'VARCHAR' LIMIT 1
+----
+FSST

external/duckdb/test/sql/storage/compression/fsst/issue_5675.test

@@ -0,0 +1,43 @@
+# name: test/sql/storage/compression/fsst/issue_5675.test
+# description: fix for issue #5675
+# group: [fsst]
+
+load __TEST_DIR__/issue_5675.db readwrite v1.0.0
+
+require parquet
+
+statement ok
+pragma threads=1
+
+statement ok
+CREATE TABLE TEST (col VARCHAR);
+
+# A very long random string -> this will compress very poorly
+statement ok
+INSERT INTO TEST
+    SELECT '33y93uhg3qi3f13hnh8xjrvvbz7iwevroaaif8v5ecfetwnd5yqde9mna8753399lj5r2u5rps5tuu0xsetmsxi80dacku7uz0q3r7h3r9gboq4c41t4h8brm6t7hcb2zg41g7elknivchc3ff409nhczhc7ciledplgcql5sfjb1x2ctuvf6cjdckfkq56ranj67qkzdnvj8guw8rxyd55298ziig0adhqsi0jdx60exhq6vv8hfqarfpvfma8qoqtv5kzte4mofm41w5uy0zdk4tjd5i7673pyigseb4mb3g6u5rwac1s8s1xcoobjoexp340hbr7vk1fwqdfisdm94967tvqxmirn6ml4ccaw3r7bh04e2p5txvea0vi965t29vbv1858ystdqpc8s9aalij445brgn55gpwtgmpbg8tkg7plw05aw8auijbkl9v4go9azrbqcb3yipi1hphmazfrzuta6qdys89usu672vs18qbricebs2rjhsqud8iemug1fr31hoaxu0lg7yfg2i8i9ufmrkgg8dtv5dw5edxptw48meec88iunibox2bc72eq5d59fmg2db7r8xtj1wptoak72on1v5jis1s024hvebx3nudmx78s32dszihs8mvkpt37fxsza9nccbo0jmyu7wzspkl1tqtbkx17lc043weyu2qavtp7vzvuyk9j7l7gha5kr6x295l9sk610ya8820atujz6dpcnkp4fuyatyefo4acc1g05ipcf2bwjgtz48ewzivm8p6kh7e1dp715x5as9bvs5i9n9pxvhp6jo7clnj987iojgztfk2fk9980gr8i69frtci4cj6rxlf9ig228tyljlqd53nwxnz7mvqjymohyqjsuunjdnioo199cl8m6fvv3hu8vh0v8otcohrskwan81p1ncqkf2svf97gyz2cu7bfrvbv03o6bflqdm60ojl0z1yta41m416mkdljpuxzk7gs9tj121jnvfe9piw1ow3ibu66eyrs2cmxopyhio4h7toekptm4xysmx96pdbjxx0kugwj4mfgjwj40ijkpwz0kjs39eumuexyooldizgzidhzk7hecfqamlnolbescpiuqrfyewm4evn2tx3cnoun9y3mciact4ont84q9z99r4wt76wusjtoz11xv5rgkz1t2dy3wtzog1ifhmprfymrzt0lzlsugjru5m6ubq87dmyzu9fwo8sivuea2zedogsm93sgwgrbomalj213ejyic4w9wgobnqjogd9j0h24u8dddr238elpqwk4sr2dznvw2fthow2l5ckua9z022nj3hktzae4jnyu7ckohdowy91lmh6ns10sialoa146x5sfje0fc4i1dt1dwbcygtmadjwjhytsvsq879y9tfud08fg2c1a01yzb5yy1z5cj99aherty940w91qjl0zl27p58enhtdvr0wzqpkgkxno93vj9qm7fiszrzcbmlowwfeusty9dkm9i4vskzovrgjpp91op2654acbblntyxra484e8ejbmehtecdh25patwrs016w7gqtvtzgufg9znmuxwcczrwgqpfkgwj27pfu56z5sd9241vjz8364zxfwfogjvhdxcxfgh6u4lbqmu1870ei2snna70atxputk4ybpj1r1e0ut4zcz8786eofale8on8uysws7mfs8o3uen21zjtqnc260s6e9tc1lpw2qk2vjsg10escmlj8hliba24sauabdc7ttj2pmv2xjh0photfpywqfbw7f9av3jxyplfap42nc9ttz1xqbrb3seieu2cnnwjc8vqxuacprwcdznwzrc99e28zf5q6y9c2exm9rbofy09w854xkplwlx2v2qjfm36r4jhwi953i993xhgu3um0qeisyfw8aicc52itcc53e98wer9iluwqrttx25vjr2ukk7m0olyzksbj9gaiu4tii3vcmk994ouvzse4khfd4ud9uxea4n8ahdshzpflx0feh0s1r9nv6e6fxipxiclaqs4hul93pbka016cq2l9cogc3tueqhwuximt11gws89uhjf81dhkowdrr0lh19yso5r2hclhblr3c0ykac7ieecfth4xbyz31hr3ug4gd8lbgkvh0hm5tgtyy84qnptuif7l6do0ksktathok43eyflzcq7z8wulniynjhqmnlrdjisosqt3mr02iuahfg7ldzvop71ezhxzgix6xzn93e2pjfo9ejjp5aqgocif4vob6t1be3hg0hn5597h5f66v2m6swkjed482ggfnw894rhxaurk67dsj2albqndwkz25rjxrahlj2eeinxqq93a30o86i865jter4g7wm0brhz5csy5kgb51sawjkc9kfcsqz92c4d7cf7f28kgtruroohlxli6bve96r2ff3eoqqupwifodag20lfp25t0fx61254kwm3s6runk0hcfn9opo2fsduoibmqdrzfnmmf431af441tkur3rhx1o08ovl9uf4xxachfj7acy58g7fnfkk4od5pfjvr20l85dfes3tq9vyom2vbx0m2r5sokx6c7chetqpphdk9etnpqxwwspcnqrq8hcrjka52lgc1y41fvnhxcdisx7w9b9l19p2rmdj4tqx4ezjghgi06b9vil6hkvllt3m2ym9e21mlqy1v0e5yoypwj32k5ri8et1bn2uqmjaw8gpcegsvv9wz45i2ggnntszj0nx05dl1u46mcb66y43xd2tyow6v6wokbeputut9ybaxz7o3hcq41s2p97mxpv34guz7xxbdhezhvja06m298nqx0qsh4tn14vcwt7kdv9rvpcwljzese17dwmnhmi38iqxf8hp5dannyffr8ijrwmxn3ezmfg6f4l8a4mwyhfcjvziu4uy9a62d8wrfskakvwh9h89rfjpa4k8edrq6jjkf9a7xu0vibp3g3escq0jjt209xxyztpy1u1yf9r2hgmw7mwa4j4565w74ib5ocn8q5wrawc9m17o1i8e3mvoc6bkj96nwm5iti5krq5xjwy8rd7j0tjkjzvupus5d64d1zt4fezbuvhieygyl0jlv8s8m24u3jj822tf1wwukafoksuigt1ttsni935ly51cqokl5k09t4y3hjszbj1cisjg18cqsqwqcrlai7exaefpknsa6euj7k0kaqbf4lya7f29zmytpzc32t3vqs2b0967a80ybxykz6fvyjdraj43831rnq19xh4m000gyi0bu5jgp8x53eibhya5xtqdglmdjrhen0md1fha4k0y95ze3v5cxssdeyqwj9y8a8eco858nf9uj6f83z3uk9yk7zi90lmcy8bm6es36hxwj8g1yygj5evne8ire0q6pa2e0jh9wmubpsv53tcof1pvhvvd7b03i2srdeykcq7sn88bv2huz39pmd4m012nx6jib7c53ape70i6gwefvatqetrvj94oq6bm50eqo4c72csqdwn55xpoq27pqot90zfzpnb690eund78eoss6ltg7zhkc4hk0qjvrl8me8cgzy0py4btyhhsks9i0veou0ia84nxbkwo758dn3m0kgp60jxcrgdjuyojbh5u67qlu69lthdzmzshij0mhlaa05rdrn9vdv1440v2rozpwdtvxzfvykb0tjx700eqdr164zy7d3ji8g82souaiui7n96my35ocgt0xmdrss'
+    FROM range(0,1) tbl(i);
+
+# Now several, slightly shorter, but still near 4k limit strings
+statement ok
+INSERT INTO TEST
+    SELECT '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'
+    FROM range(0,90) tbl(i);
+
+# Followed by many empty strings ->
+statement ok
+INSERT INTO TEST SELECT '' FROM range(0,100000) tbl(i);
+
+# With the finishing move of a single char string
+statement ok
+INSERT INTO TEST values ('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');
+
+# Now create our FSST table
+statement ok
+pragma force_compression='fsst';
+
+statement ok
+CREATE TABLE TEST2 as SELECT * FROM TEST;
+
+statement ok
+CHECKPOINT;

external/duckdb/test/sql/storage/compression/fsst/issue_5675_followup.test

@@ -0,0 +1,29 @@
+# name: test/sql/storage/compression/fsst/issue_5675_followup.test
+# description: Issue #5675: Follow up test to cover issue when the 1+th segment of a rowgroup is flushed with 1 value
+# group: [fsst]
+
+load __TEST_DIR__/issue_5675_followup.db readwrite v1.0.0
+
+require parquet
+
+statement ok
+pragma threads=1
+
+statement ok
+CREATE TABLE TEST (col VARCHAR);
+
+# This will fill up a segment completely with 1 value
+statement ok
+INSERT INTO TEST SELECT CASE WHEN i%2==0
+    THEN
+        'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
+    ELSE
+        'aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa'
+END FROM range(0,2214) tbl(i);
+
+# Now create our FSST table
+statement ok
+pragma force_compression='fsst';
+
+statement ok
+CREATE TABLE TEST2 as SELECT * FROM TEST;

external/duckdb/test/sql/storage/compression/fsst/issue_5759.test

@@ -0,0 +1,12 @@
+# name: test/sql/storage/compression/fsst/issue_5759.test
+# description: Issue #5759: segfault on sample creation
+# group: [fsst]
+
+load __TEST_DIR__/issue_5759.db readwrite v1.0.0
+
+statement ok
+pragma force_compression='fsst'
+
+# With many short and a few small strings, the sample calculation would overflow
+statement ok
+CREATE TABLE trigger5759 AS SELECT CASE WHEN RANDOM() > 0.95 THEN repeat('ab', 1500) ELSE 'c' END FROM range(0,1000);