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DB optimizations

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Dragory 2020-06-01 22:21:42 +03:00
parent 80f6f69ccd
commit a6e650810c
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2 changed files with 66 additions and 0 deletions
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45
backend/src/migrations/1591036185142-OptimizeMessageIndices.ts Normal file
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import { MigrationInterface, QueryRunner, TableIndex } from "typeorm";
export class OptimizeMessageIndices1591036185142 implements MigrationInterface {
public async up(queryRunner: QueryRunner): Promise<any> {
// guild_id, channel_id, user_id indices -> composite(guild_id, channel_id, user_id)
await queryRunner.dropIndex("messages", "IDX_b193588441b085352a4c010942"); // guild_id
await queryRunner.dropIndex("messages", "IDX_86b9109b155eb70c0a2ca3b4b6"); // channel_id
await queryRunner.dropIndex("messages", "IDX_830a3c1d92614d1495418c4673"); // user_id
await queryRunner.createIndex(
"messages",
new TableIndex({
columnNames: ["guild_id", "channel_id", "user_id"],
}),
);
// posted_at, is_permanent indices -> composite(posted_at, is_permanent)
await queryRunner.dropIndex("messages", "IDX_08e1f5a0fef0175ea402c6b2ac"); // posted_at
await queryRunner.dropIndex("messages", "IDX_f520029c07824f8d96c6cd98e8"); // is_permanent
await queryRunner.createIndex(
"messages",
new TableIndex({
columnNames: ["posted_at", "is_permanent"],
}),
);
// is_bot -> no index (the database doesn't appear to use this index anyway)
await queryRunner.dropIndex("messages", "IDX_eec2c581ff6f13595902c31840");
}
public async down(queryRunner: QueryRunner): Promise<any> {
// no index -> is_bot index
await queryRunner.createIndex("messages", new TableIndex({ columnNames: ["is_bot"] }));
// composite(posted_at, is_permanent) -> posted_at, is_permanent indices
await queryRunner.dropIndex("messages", "IDX_afe125bfd65341cd90eee0b310"); // composite(posted_at, is_permanent)
await queryRunner.createIndex("messages", new TableIndex({ columnNames: ["posted_at"] }));
await queryRunner.createIndex("messages", new TableIndex({ columnNames: ["is_permanent"] }));
// composite(guild_id, channel_id, user_id) -> guild_id, channel_id, user_id indices
await queryRunner.dropIndex("messages", "IDX_dedc3ea6396e1de8ac75533589"); // composite(guild_id, channel_id, user_id)
await queryRunner.createIndex("messages", new TableIndex({ columnNames: ["guild_id"] }));
await queryRunner.createIndex("messages", new TableIndex({ columnNames: ["channel_id"] }));
await queryRunner.createIndex("messages", new TableIndex({ columnNames: ["user_id"] }));
}
}

21
backend/src/migrations/1591038041635-OptimizeMessageTimestamps.ts Normal file
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import { MigrationInterface, QueryRunner } from "typeorm";
export class OptimizeMessageTimestamps1591038041635 implements MigrationInterface {
public async up(queryRunner: QueryRunner): Promise<any> {
// DATETIME(3) -> DATETIME(0)
await queryRunner.query(`
ALTER TABLE \`messages\`
CHANGE COLUMN \`posted_at\` \`posted_at\` DATETIME(0) NOT NULL AFTER \`data\`,
CHANGE COLUMN \`deleted_at\` \`deleted_at\` DATETIME(0) NULL DEFAULT NULL AFTER \`posted_at\`
`);
}
public async down(queryRunner: QueryRunner): Promise<any> {
// DATETIME(0) -> DATETIME(3)
await queryRunner.query(`
ALTER TABLE \`messages\`
CHANGE COLUMN \`posted_at\` \`posted_at\` DATETIME(3) NOT NULL AFTER \`data\`,
CHANGE COLUMN \`deleted_at\` \`deleted_at\` DATETIME(3) NULL DEFAULT NULL AFTER \`posted_at\`
`);
}
}