warkanum
b4f18f088b
- migration writer now emits unique constraints (direct apply and live diff previously dropped them); idempotent via the existing DO block - unique constraint adopts a same-named model unique index with ADD CONSTRAINT ... UNIQUE USING INDEX instead of building a second index - dbml reader names unnamed unique indexes ukey_<table>_<cols> to match the unique constraint naming - foreign key deferral: Constraint.Deferrable/InitiallyDeferred are *bool (nil = unspecified, never diffed); writers emit DEFERRABLE, DEFERRABLE INITIALLY DEFERRED and NOT DEFERRABLE; live reader reads condeferrable and condeferred; dbml reader/writer support deferrable and initially deferred - tests and README/naming docs updated
13 lines
442 B
Cheetah
13 lines
442 B
Cheetah
DO $$
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BEGIN
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IF NOT EXISTS (
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SELECT 1 FROM information_schema.table_constraints
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WHERE table_schema = '{{.SchemaName}}'
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AND table_name = '{{.TableName}}'
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AND constraint_name = '{{.ConstraintName}}'
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) THEN
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ALTER TABLE {{qual_table .SchemaName .TableName}} ADD CONSTRAINT {{quote_ident .ConstraintName}} UNIQUE {{if .UsingIndex}}USING INDEX {{quote_ident .UsingIndex}}{{else}}({{.Columns}}){{end}};
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END IF;
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END;
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$$;
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