81a25790f1
Strictly speaking, we only need to make sure to leave the scan's array keys in their final positions (final for the current scan direction) to handle SAOP array exhaustion because btgettuple might only return a subset of the items for the final page (final for the current scan direction), before the scan changes direction. While it's typical for so->currPos to be invalidated shortly after the scan's arrays are first exhausted, and while so->currPos invalidation does obviate the need to leave the scan's arrays in any particular state, we can't rely on any of that actually happening when handling array exhaustion. Adjust comments to make all of that a lot clearer. Oversight in commit 5bf748b8, which enhanced nbtree ScalarArrayOp execution.
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.
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General documentation about this version of PostgreSQL can be found at https://www.postgresql.org/docs/devel/. In particular, information about building PostgreSQL from the source code can be found at https://www.postgresql.org/docs/devel/installation.html.
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