Return useful error when attempting to reuse a blocked connection

Repository metrics

Stars

9,946 stars (9,946 stars)

PR merge metrics

Avg merge 5h 59m (Avg merge 5h 59m)4 merged PRs in 30d (4 merged PRs in 30d)

Description

func query(db *sql.DB) {
	var (
		tx    *sql.Tx
		stmt1 *sql.Stmt
		stmt2 *sql.Stmt
		rs1   *sql.Rows
		rs2   *sql.Rows
	)

	tx, _ = db.Begin()
	stmt1, _ = tx.Prepare("select f1, f2 from test where f2 = 11")
	rs1, _ = stmt1.Query()
	rs1.Next()

	stmt2, _ = tx.Prepare("select f2 from test where f2 = 111")  // error here
	rs2, _ = stmt2.Query()
	rs2.Next()

}

[mysql] 2016/12/08 15:45:57 packets.go:431: busy buffer

Contributor guide

Research direction

Inspect the 'busy buffer' error in packets.go:431 and trace the packet handling logic for prepared statements on transactions.

Tech stack

go

Domain

backend

Issue type

Bug

DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.

2

Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.

1-3 hours

Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.

Active

ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.

Mostly clear

Prerequisites

GitGo

Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.

50