ext/pgsql: add pg_jit server info.

since PostgreSQL 11, LLVM JIT feature had been brought thus reporting
the settings to the client connection.

Close GH-14566

Author: devnexen

NEWS

@@ -213,6 +213,7 @@ PHP                                                                        NEWS
   . Added pg_put_copy_data/pg_put_copy_end to send COPY commands and signal
     the end of the COPY. (David Carlier)
   . Added pg_socket_poll to poll on the connection. (David Carlier)
+  . Added pg_jit to get infos on server JIT support. (David Carlier)
 
 - Phar:
   . Fixed bug GH-12532 (PharData created from zip has incorrect timestamp).

UPGRADING

@@ -561,6 +561,7 @@ PHP 8.4 UPGRADE NOTES
     end-of-data to the server.
   . Added pg_socket_poll to check if there is any read and/or write events
     with an optional timeout.
+  . Added pg_jit to get informations on the server JIT support.
 
 - Sodium:
   . Added the sodium_crypto_aead_aegis128l_*() and sodium_crypto_aead_aegis256l_*()

Zend/Optimizer/zend_func_infos.h

@@ -333,6 +333,7 @@ static const func_info_t func_infos[] = {
 	F1("pg_tty", MAY_BE_STRING),
 	F1("pg_host", MAY_BE_STRING),
 	F1("pg_version", MAY_BE_ARRAY|MAY_BE_ARRAY_KEY_STRING|MAY_BE_ARRAY_OF_LONG|MAY_BE_ARRAY_OF_STRING|MAY_BE_ARRAY_OF_NULL),
+	F1("pg_jit", MAY_BE_ARRAY|MAY_BE_ARRAY_KEY_STRING|MAY_BE_ARRAY_OF_STRING|MAY_BE_ARRAY_OF_NULL),
 	F1("pg_parameter_status", MAY_BE_STRING|MAY_BE_FALSE),
 	F1("pg_query", MAY_BE_OBJECT|MAY_BE_FALSE),
 	F1("pg_query_params", MAY_BE_OBJECT|MAY_BE_FALSE),

ext/pgsql/pgsql.c

@@ -864,6 +864,7 @@ PHP_FUNCTION(pg_close)
 #define PHP_PG_TTY 5
 #define PHP_PG_HOST 6
 #define PHP_PG_VERSION 7
+#define PHP_PG_JIT 8
 
 /* php_pgsql_get_link_info */
 static void php_pgsql_get_link_info(INTERNAL_FUNCTION_PARAMETERS, int entry_type)
@@ -929,6 +930,25 @@ static void php_pgsql_get_link_info(INTERNAL_FUNCTION_PARAMETERS, int entry_type
 			PHP_PQ_COPY_PARAM("application_name");
 			return;
 		}
+		case PHP_PG_JIT: {
+			PGresult *res;
+			array_init(return_value);
+			res = PQexec(pgsql, "SHOW jit_provider");
+			if (PQresultStatus(res) != PGRES_TUPLES_OK) {
+                            add_assoc_null(return_value, "jit_provider");
+			} else {
+                            add_assoc_string(return_value, "jit_provider", PQgetvalue(res, 0, 0));
+			}
+			PQclear(res);
+			res = PQexec(pgsql, "SHOW jit");
+			if (PQresultStatus(res) != PGRES_TUPLES_OK) {
+                            add_assoc_null(return_value, "jit");
+			} else {
+                            add_assoc_string(return_value, "jit", PQgetvalue(res, 0, 0));
+			}
+			PQclear(res);
+			return;
+		}
 		EMPTY_SWITCH_DEFAULT_CASE()
 	}
 	if (result) {
@@ -980,6 +1000,11 @@ PHP_FUNCTION(pg_version)
 	php_pgsql_get_link_info(INTERNAL_FUNCTION_PARAM_PASSTHRU,PHP_PG_VERSION);
 }
 
+PHP_FUNCTION(pg_jit)
+{
+	php_pgsql_get_link_info(INTERNAL_FUNCTION_PARAM_PASSTHRU,PHP_PG_JIT);
+}
+
 /* Returns the value of a server parameter */
 PHP_FUNCTION(pg_parameter_status)
 {

ext/pgsql/pgsql.stub.php

@@ -497,6 +497,12 @@ function pg_host(?PgSql\Connection $connection = null): string {}
      */
     function pg_version(?PgSql\Connection $connection = null): array {}
 
+    /**
+     * @return array<string, string|null>
+     * @refcount 1
+     */
+    function pg_jit(?PgSql\Connection $connection = null): array {}
+
     /**
      * @param PgSql\Connection|string $connection
      * @refcount 1

ext/pgsql/pgsql_arginfo.h

@@ -0,0 +1,21 @@
+--TEST--
+PostgreSQL JIT support
+--EXTENSIONS--
+pgsql
+--SKIPIF--
+<?php include("inc/skipif.inc"); ?>
+--FILE--
+<?php
+include('inc/config.inc');
+
+$db = pg_connect($conn_str);
+var_dump(pg_jit($db));
+pg_close($db);
+?>
+--EXPECTF--
+array(2) {
+  ["jit_provider"]=>
+  %s
+  ["jit"]=>
+  %s
+}