@clickup/pg-mig/src/internal/helpers/isSchemaValid.ts

PostgreSQL schema migration tool with microsharding and clustering support

/**
 * Returns true if the schema should have migrations applied. Non-shard schemas
 * (matched by the exact prefix name, e.g. "public") are always valid. Shard
 * schemas (matched by prefix + digits, e.g. "sh0042") are valid only when
 * validShards is undefined (no filter) or contains the schema name.
 */
export function isSchemaValid(
  schema: string,
  schemaPrefix: string,
  validShards: Set<string> | undefined,
): boolean {
  if (!validShards) {
    return true;
  }

  const isShardSchema = schema !== schemaPrefix;
  return !isShardSchema || validShards.has(schema);
}