ExtractWheneableMergeQueryBuilder

type ExtractWheneableMergeQueryBuilder<DB, TT extends keyof DB, TE extends TableExpression<DB, TT>, O> = TE extends `${infer T} as ${infer A}` ? T extends keyof DB ? UsingBuilder<DB, TT, A, DB[T], O> : never : TE extends keyof DB ? WheneableMergeQueryBuilder<DB, TT, TE, O> : TE extends AliasedExpression<infer QO, infer QA> ? UsingBuilder<DB, TT, QA, QO, O> : TE extends (qb: any) => AliasedExpression<infer QO, infer QA> ? UsingBuilder<DB, TT, QA, QO, O> : never;