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11c34b342b
This commit changes the query jumbling of CallStmt so as its IN/OUT parameters are able to show up as constants with a parameter symbol in pg_stat_statements, like: CALL proc1($1, $2); CALL proc2($1, $2, $3); The transformed FuncExpr is used in the query ID computation instead of the FuncCall generated by the parser, so as it is sensitive to the OID of the procedure and its list of input arguments. The output arguments are handled in a separate list in CallStmt, which is also included in the computation. Tests are added to pg_stat_statements to show how this affects CALL with IN/OUT parameters as well as overloaded functions. Like 638d42a3c520 or 31de7e60da34, this improves the monitoring of workloads with a lot of CALL statements, preventing unnecessary bloat when these use different input (or event output) values. Author: Sami Imseih Discussion: https://postgr.es/m/B44FA29D-EBD0-4DD9-ABC2-16F1CB087074@amazon.com
The PostgreSQL contrib tree
---------------------------
This subtree contains porting tools, analysis utilities, and plug-in
features that are not part of the core PostgreSQL system, mainly
because they address a limited audience or are too experimental to be
part of the main source tree. This does not preclude their
usefulness.
User documentation for each module appears in the main SGML
documentation.
When building from the source distribution, these modules are not
built automatically, unless you build the "world" target. You can
also build and install them all by running "make all" and "make
install" in this directory; or to build and install just one selected
module, do the same in that module's subdirectory.
Some directories supply new user-defined functions, operators, or
types. To make use of one of these modules, after you have installed
the code you need to register the new SQL objects in the database
system by executing a CREATE EXTENSION command. In a fresh database,
you can simply do
CREATE EXTENSION module_name;
See the PostgreSQL documentation for more information about this
procedure.