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fix(postgres)!: map ISO week format patterns IYYY and IW [CLAUDE] #8672

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Merged
georgesittas merged 1 commit into from
Oct 19, 2026
+15 −0
Merged

fix(postgres)!: map ISO week format patterns IYYY and IW [CLAUDE] #8672

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4 changes: 4 additions & 0 deletions sqlglot/dialects/postgres.py
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,10 @@ class Postgres(Dialect):
"FMSS": "%-S", # Second
"HH12": "%I", # 09
"HH24": "%H", # 09
"iw": "%V", # ISO 8601 week of year
"IW": "%V", # ISO 8601 week of year
"iyyy": "%G", # ISO 8601 week-numbering year
"IYYY": "%G", # ISO 8601 week-numbering year
"mi": "%M", # zero padded minute
"MI": "%M", # zero padded minute
"mm": "%m", # 01
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11 changes: 11 additions & 0 deletions tests/dialects/test_postgres.py
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Expand Up @@ -1073,6 +1073,17 @@ def test_postgres(self):
"postgres": "SELECT TO_DATE('01/01/2000', 'MM/DD/YYYY')",
},
)
self.validate_all(
"SELECT TO_CHAR(x, 'IYYY-IW')",
read={
"duckdb": "SELECT STRFTIME(x, '%G-%V')",
"postgres": "SELECT TO_CHAR(x, 'iyyy-iw')",
},
write={
"duckdb": "SELECT STRFTIME(x, '%G-%V')",
"postgres": "SELECT TO_CHAR(x, 'IYYY-IW')",
},
)

self.validate_identity(
'SELECT js, js IS JSON AS "json?", js IS JSON VALUE AS "scalar?", js IS JSON SCALAR AS "scalar?", js IS JSON OBJECT AS "object?", js IS JSON ARRAY AS "array?" FROM t'
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