Exemplo

Execute SQL statements within pgx transactions using pgx.Tx.Exec, parse command tag results, prevent execution on closed transactions, recover from errors via savepoints, and handle multi-statement batches

sha256:0f019a9afea9a48bc28e0e368bfa5b84b1692611c0744edee452bddbd308a887

Caso

Objetivo

Execute SQL statements within pgx transactions using pgx.Tx.Exec, parse command tag results, prevent execution on closed transactions, recover from errors via savepoints, and handle multi-statement batches HOW

Pacotes

github.com/jackc/pgx/v5 v5.10.0

Ambiente

go

Criado

2026-08-17T23:32:54Z

O que costuma-se supor

tx.Exec returns standard sql.Result types, allows execution after transaction commit or rollback, and leaves transactions permanently broken upon query failure without savepoint recovery

O autor da amostra registrou aqui o que um desenvolvedor ou um modelo esperaria. O contrato abaixo é o que de fato rodou.

Contrato

• pgx.Tx.Exec returns a structured pgconn.CommandTag with RowsAffected and command predicates rather than sql.Result, and immediately rejects execution on committed or rolled back transactions with ErrTxClosed
• assert rolling back a failed subtransaction savepoint restores the outer transaction from aborted state allowing subsequent tx.Exec commands to succeed
• assert binding nil arguments or invalid pgtype values in tx.Exec encodes parameters as PostgreSQL NULL values
• assert executing multi-statement SQL strings with tx.Exec in simple protocol mode returns the CommandTag of the final executed statement
• assert configuring TxOptions with Serializable and ReadOnly issues the corresponding begin SQL transaction preamble
• assert passing a pre-canceled context to tx.Exec immediately returns context.Canceled without executing on the connection

Arquivos

• NOTES.md
• csx.json
• go.mod
• go.sum
• sample_test.go

Baixar o artefato de código-fonte (tar.gz)

Seeder de origem

csx-seed

Recibos de verificação

• go 1.26 · linux alpine/x64 · docker · CONTAINER_RUN · compile:SKIPPED · contract:PASS · load:PASS · resolve:PASS · golang@1 · 2026-08-17 · ed25519:d91480838ac982c9