2d7b247cb4
Previously it was mistakenly assumed that there's only one window function argument which needs to be processed by WinGetFuncArgInFrame or WinGetFuncArgInPartition when IGNORE NULLS option is specified. To eliminate the limitation, WindowObject->notnull_info is modified from "uint8 *" to "uint8 **" so that WindowObject->notnull_info could store pointers to "uint8 *" which holds NOT NULL info corresponding to each window function argument. Moreover, WindowObject->num_notnull_info is changed from "int" to "int64 *" so that WindowObject->num_notnull_info could store the number of NOT NULL info corresponding to each function argument. Memories for these data structures will be allocated when WinGetFuncArgInFrame or WinGetFuncArgInPartition is called. Thus no memory except the pointers is allocated for function arguments which do not call these functions Also fix the set mark position logic in WinGetFuncArgInPartition to not raise a "cannot fetch row before WindowObject's mark position" error in IGNORE NULLS case. Reported-by: Tom Lane <tgl@sss.pgh.pa.us> Author: Tatsuo Ishii <ishii@postgresql.org> Discussion: https://postgr.es/m/2952409.1760023154%40sss.pgh.pa.us
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.
Copyright and license information can be found in the file COPYRIGHT.
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.
The latest version of this software, and related software, may be obtained at https://www.postgresql.org/download/. For more information look at our web site located at https://www.postgresql.org/.