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flyway-migrations

Name: Flyway Migrations
Author: zapek

// Flyway SQL migration patterns for Xeres including naming conventions, H2 database patterns, enum types, foreign keys, and best practices.

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stars:203

forks:21

updated:10 de abril de 2026 às 16:45

SKILL.md

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name	flyway-migrations
description	Flyway SQL migration patterns for Xeres including naming conventions, H2 database patterns, enum types, foreign keys, and best practices.

Flyway Migration Patterns for Xeres

Migration Location

app/src/main/resources/db/migration/

Naming Convention

V<major>_<minor>_<timestamp>__<description>.sql

Examples:

V00_0_1_202001232214__InitDb.sql
V00_0_32_202603092327__AddIndices.sql

Table Creation Pattern

CREATE TABLE profile (
    id          BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
    name        VARCHAR(255) NOT NULL,
    pgp_id      BIGINT,
    created     TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT profile_pkey PRIMARY KEY (id)
);

CREATE INDEX idx_profile_name ON profile(name);

Enum Types

CREATE TYPE trust_level AS ENUM ('UNKNOWN', 'NEVER', 'MARGINAL', 'FULLY', 'ULTIMATE');

ALTER TABLE profile ADD COLUMN trust trust_level NOT NULL DEFAULT 'UNKNOWN';

Foreign Keys

ALTER TABLE contact
    ADD CONSTRAINT fk_contact_profile
    FOREIGN KEY (profile_id) REFERENCES profile(id)
    ON DELETE CASCADE;

Best Practices

Separate index creation from table creation
Name all constraints explicitly for easier debugging
Use BIGINT for IDs with GENERATED BY DEFAULT AS IDENTITY
Include NOT NULL constraints where appropriate
Default values for optional columns
One concern per migration when possible
Timestamp precision must always be of TIMESTAMP(9)

Rolling Back

Add downward migrations with V<version>__<name>.sql (no timestamp):

-- V00_0_33__AddLocations.sql
ALTER TABLE location DROP COLUMN IF EXISTS last_seen;

Testing Migrations

Flyway runs automatically on application startup with H2 database.

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package.json

"author": "zapek"

"repository": "zapek/Xeres"

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Arquitetos de banco de dadosInformática e Matemática15-1243L4

name	flyway-migrations
description	Flyway SQL migration patterns for Xeres including naming conventions, H2 database patterns, enum types, foreign keys, and best practices.

Flyway Migration Patterns for Xeres

Migration Location

app/src/main/resources/db/migration/

Naming Convention

V<major>_<minor>_<timestamp>__<description>.sql

Examples:

V00_0_1_202001232214__InitDb.sql
V00_0_32_202603092327__AddIndices.sql

Table Creation Pattern

CREATE TABLE profile (
    id          BIGINT GENERATED BY DEFAULT AS IDENTITY PRIMARY KEY,
    name        VARCHAR(255) NOT NULL,
    pgp_id      BIGINT,
    created     TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
    CONSTRAINT profile_pkey PRIMARY KEY (id)
);

CREATE INDEX idx_profile_name ON profile(name);

Enum Types

CREATE TYPE trust_level AS ENUM ('UNKNOWN', 'NEVER', 'MARGINAL', 'FULLY', 'ULTIMATE');

ALTER TABLE profile ADD COLUMN trust trust_level NOT NULL DEFAULT 'UNKNOWN';

Foreign Keys

ALTER TABLE contact
    ADD CONSTRAINT fk_contact_profile
    FOREIGN KEY (profile_id) REFERENCES profile(id)
    ON DELETE CASCADE;

Best Practices

Separate index creation from table creation
Name all constraints explicitly for easier debugging
Use BIGINT for IDs with GENERATED BY DEFAULT AS IDENTITY
Include NOT NULL constraints where appropriate
Default values for optional columns
One concern per migration when possible
Timestamp precision must always be of TIMESTAMP(9)

Rolling Back

Add downward migrations with V<version>__<name>.sql (no timestamp):

-- V00_0_33__AddLocations.sql
ALTER TABLE location DROP COLUMN IF EXISTS last_seen;

Testing Migrations

Flyway runs automatically on application startup with H2 database.

flyway-migrations

Flyway Migration Patterns for Xeres

Migration Location

Naming Convention

Table Creation Pattern

Enum Types

Foreign Keys

Best Practices

Rolling Back

Testing Migrations

Mais deste repositório

Mais deste repositório

Flyway Migration Patterns for Xeres

Migration Location

Naming Convention

Table Creation Pattern

Enum Types

Foreign Keys

Best Practices

Rolling Back

Testing Migrations