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When executing CALL in PL/pgSQL, we need to set a snapshot before invoking the to-be-called procedure. Otherwise, the to-be-called procedure might end up running without a snapshot. For LANGUAGE SQL procedures, this would result in an assertion failure. (For most other languages, this is usually not a problem, because those use SPI and SPI sets snapshots in most cases.) Setting the snapshot restores the behavior of how CALL worked when it was handled as a generic SQL statement in PL/pgSQL (exec_stmt_execsql()). This change revealed another problem: In SPI_commit(), we popped the active snapshot before committing the transaction, to avoid "snapshot %p still active" errors. However, there is no particular reason why only at most one snapshot should be on the stack. So change this to pop all active snapshots instead of only one. |
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PostgreSQL Database Management System ===================================== This directory contains the source code distribution of the PostgreSQL database management system. PostgreSQL is an advanced object-relational database management system that supports an extended subset of the SQL standard, including transactions, foreign keys, subqueries, triggers, user-defined types and functions. This distribution also contains C language bindings. PostgreSQL has many language interfaces, many of which are listed here: https://www.postgresql.org/download See the file INSTALL for instructions on how to build and install PostgreSQL. That file also lists supported operating systems and hardware platforms and contains information regarding any other software packages that are required to build or run the PostgreSQL system. Copyright and license information can be found in the file COPYRIGHT. A comprehensive documentation set is included in this distribution; it can be read as described in the installation instructions. The latest version of this software may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.