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optimize get foreign keys

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make separate requests to each information_schema table instead of one with inner joins for much better performance on MySQL 5.7
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tiagolima90 2022-03-15 00:16:19 -01:00 committed by GitHub
parent 22abfcaff7
commit c4690953eb
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GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 33 additions and 16 deletions
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49
packages/core/database/lib/dialects/mysql/schema-inspector.js
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@ -26,19 +26,32 @@ const SQL_QUERIES = {
`,
FOREIGN_KEY_LIST: /* sql */ `
SELECT
tc.constraint_name as constraint_name,
kcu.column_name as column_name,
kcu.referenced_table_name as referenced_table_name,
kcu.referenced_column_name as referenced_column_name,
rc.update_rule as on_update,
rc.delete_rule as on_delete
tc.constraint_name as constraint_name
FROM information_schema.table_constraints tc
INNER JOIN information_schema.key_column_usage kcu ON tc.constraint_name = kcu.constraint_name
INNER JOIN information_schema.referential_constraints AS rc ON kcu.constraint_name = rc.constraint_name
WHERE constraint_type = 'FOREIGN KEY'
WHERE tc.constraint_type = 'FOREIGN KEY'
AND tc.table_schema = database()
AND tc.table_name = ?;
`,
FOREIGN_KEY_REFERENCES: /* sql */ `
SELECT
kcu.constraint_name as constraint_name,
kcu.column_name as column_name,
kcu.referenced_table_name as referenced_table_name,
kcu.referenced_column_name as referenced_column_name
FROM information_schema.key_column_usage kcu
WHERE kcu.constraint_name = ?
AND kcu.table_schema = database()
AND kcu.table_name = ?;
`,
FOREIGN_KEY_REFERENTIALS_CONSTRAINTS: /* sql */ `
SELECT
rc.constraint_name as constraint_name,
rc.update_rule as on_update,
rc.delete_rule as on_delete
FROM information_schema.referential_constraints AS rc
WHERE rc.constraint_name = ?
AND rc.constraint_schema = database()
AND rc.table_name = ?;
`,
};
@ -177,21 +190,25 @@ class MysqlSchemaInspector {
const ret = {};
for (const fk of rows) {
const [[references]] = await this.db.connection.raw(SQL_QUERIES.FOREIGN_KEY_REFERENCES, [fk.constraint_name, tableName]);
const [[referentialConstraints]] = await this.db.connection.raw(SQL_QUERIES.FOREIGN_KEY_REFERENTIALS_CONSTRAINTS, [fk.constraint_name, tableName]);
if (!ret[fk.constraint_name]) {
ret[fk.constraint_name] = {
name: fk.constraint_name,
columns: [fk.column_name],
referencedColumns: [fk.referenced_column_name],
referencedTable: fk.referenced_table_name,
onUpdate: fk.on_update.toUpperCase(),
onDelete: fk.on_delete.toUpperCase(),
columns: [references.column_name],
referencedColumns: [references.referenced_column_name],
referencedTable: references.referenced_table_name,
onUpdate: referentialConstraints.on_update.toUpperCase(),
onDelete: referentialConstraints.on_delete.toUpperCase(),
};
} else {
ret[fk.constraint_name].columns.push(fk.column_name);
ret[fk.constraint_name].referencedColumns.push(fk.referenced_column_name);
}
}
return Object.values(ret);
}
}