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This parser uses an explicit prediction stack, unlike the present recursive descent parser where the parser state is represented on the call stack. This difference makes the new parser suitable for use in incremental parsing of huge JSON documents that cannot be conveniently handled piece-wise by the recursive descent parser. One potential use for this will be in parsing large backup manifests associated with incremental backups. Because this parser is somewhat slower than the recursive descent parser, it is not replacing that parser, but is an additional parser available to callers. For testing purposes, if the build is done with -DFORCE_JSON_PSTACK, all JSON parsing is done with the non-recursive parser, in which case only trivial regression differences in error messages should be observed. Author: Andrew Dunstan Reviewed-By: Jacob Champion Discussion: https://postgr.es/m/7b0a51d6-0d9d-7366-3a1a-f74397a02f55@dunslane.net
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/.