Is there any benefit to putting the db connection in the context versus having it as an global var?

export const challengesRouter = router({
  getChallengeById: privateProcedure
    .input(z.string().uuid())
    .query(async ({ input }) => {
      const challenge = await db.query.challengeTable.findFirst({
        where: (columns, { eq }) => eq(columns.sectionId, input),
        columns: {
          id: true,
          sectionId: true,
        },
      });
      return challenge;
    }),
});

export const challengesRouter = router({
  getChallengeById: privateProcedure
    .input(z.string().uuid())
    .query(async ({ input }) => {
      const challenge = await db.query.challengeTable.findFirst({
        where: (columns, { eq }) => eq(columns.sectionId, input),
        columns: {
          id: true,
          sectionId: true,
        },
      });
      return challenge;
    }),
});

export const challengesRouter = router({
  getChallengeById: privateProcedure
    .input(z.string().uuid())
    .query(async ({ input, ctx }) => {
      const challenge = await ctx.db.query.challengeTable.findFirst({
        where: (columns, { eq }) => eq(columns.sectionId, input),
        columns: {
          id: true,
          sectionId: true,
        },
      });
      return challenge;
    }),
});

export const challengesRouter = router({
  getChallengeById: privateProcedure
    .input(z.string().uuid())
    .query(async ({ input, ctx }) => {
      const challenge = await ctx.db.query.challengeTable.findFirst({
        where: (columns, { eq }) => eq(columns.sectionId, input),
        columns: {
          id: true,
          sectionId: true,
        },
      });
      return challenge;
    }),
});