Provided by: postgresql-doc-18_18.1-2_all 

NAME
SPI_start_transaction - obsolete function
SYNOPSIS
void SPI_start_transaction(void)
DESCRIPTION
SPI_start_transaction does nothing, and exists only for code compatibility with earlier PostgreSQL
releases. It used to be required after calling SPI_commit or SPI_rollback, but now those functions start
a new transaction automatically.
PostgreSQL 18.1 2025 SPI_START_TRANSACTION(3)