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Oleksandr Bezdieniezhnykh
16 lines
858 B
Plaintext
16 lines
858 B
Plaintext
---
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description: "SQL and database migration conventions: naming, safety, parameterized queries, indexing, Postgres"
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globs: ["**/*.sql", "**/migrations/**", "**/Migrations/**"]
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---
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# SQL / Migrations
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- Use lowercase for SQL keywords (or match project convention); snake_case for table/column names
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- Every migration must be reversible (include DOWN/rollback)
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- Never rename tables or columns without explicit confirmation — prefer additive changes
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- Use parameterized queries; never concatenate user input into SQL
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- Add indexes for columns used in WHERE, JOIN, ORDER BY
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- Use transactions for multi-step data changes
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- Include `NOT NULL` constraints by default; explicitly allow `NULL` only when needed
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- Name constraints explicitly: `pk_table`, `fk_table_column`, `idx_table_column`
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- Test migrations against a copy of production schema before applying
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