Try CreateOneShotCachedPlan for unnamed statements in exec_parse_message

.travis.yml

@@ -0,0 +1,43 @@
+sudo: false
+language: java
+
+before_script:
+  - ./.travis/make_postgres.sh
+  - psql -U postgres -c "create user test with password 'test';"
+  - psql -c 'create database test owner test;' -U postgres
+  - echo "MAVEN_OPTS='-Xmx1g -Dgpg.skip=true'" > ~/.mavenrc
+  - psql test -c 'CREATE EXTENSION hstore;' -U postgres
+
+script:
+  # make sure previous build artifacts are not used for subsequent builds
+  - ./.travis/travis_build.sh
+
+before_cache:
+  # No sense in caching current build artifacts
+  rm -rf $HOME/.m2/repository/org/postgresql
+
+# Skip default "mvn install" issued by Travis
+# Root project cannot be compiled with older JDKs, so it makes sense to just skip the step
+install: true
+
+cache:
+  directories:
+    - '$HOME/.m2/repository'
+
+matrix:
+  fast_finish: true
+  include:
+    - env:
+        - TEST=PG_CHECK
+      script: make check
+    - env:
+        - TEST=PG_CHECK_WORLD
+      script: PGHOST=localhost make check-world
+    - jdk: oraclejdk8
+      env:
+        - TEST=pgjdbc
+      script: ./.travis/pgjdbc_check.sh
+
+branches:
+  only:
+    - travis

.travis/make_postgres.sh

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -x -e
+
+PREFIX=$HOME/pg_head
+
+./configure --prefix=$PREFIX
+
+# Build PostgreSQL from source and start the DB
+make && make install && $PREFIX/bin/pg_ctl -D $PREFIX/data initdb && $PREFIX/bin/pg_ctl -D $PREFIX/data -l postgres.log start

.travis/pgjdbc_check.sh

@@ -0,0 +1,8 @@
+#!/usr/bin/env bash
+set -x -e
+
+git clone --depth=1 https://github.com/pgjdbc/pgjdbc.git
+
+cd pgjdbc
+
+mvn clean package -B -V

README.md

@@ -0,0 +1,29 @@
+[![Build Status](https://travis-ci.org/vlsi/postgres.svg?branch=travis)](https://travis-ci.org/vlsi/postgres)
+
+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.
+
+PostgreSQL has many language interfaces, many of which are listed here:
+
+	http://www.postgresql.org/download
+
+See the file INSTALL for instructions on how to build and install
+PostgreSQL.  That file also lists supported operating systems and
+hardware platforms and contains information regarding any other
+software packages that are required to build or run the PostgreSQL
+system.  Copyright and license information can be found in the
+file COPYRIGHT.  A comprehensive documentation set is included in this
+distribution; it can be read as described in the installation
+instructions.
+
+The latest version of this software may be obtained at
+http://www.postgresql.org/download/.  For more information look at our
+web site located at http://www.postgresql.org/.

src/backend/tcop/postgres.c

@@ -1308,7 +1308,11 @@ exec_parse_message(const char *query_string,	/* string to execute */
 		 * Create the CachedPlanSource before we do parse analysis, since it
 		 * needs to see the unmodified raw parse tree.
 		 */
-		psrc = CreateCachedPlan(raw_parse_tree, query_string, commandTag);
+		if (is_named) {
+			psrc = CreateCachedPlan(raw_parse_tree, query_string, commandTag);
+		} else {
+			psrc = CreateOneShotCachedPlan(raw_parse_tree, query_string, commandTag);
+		}
 
 		/*
 		 * Set up a snapshot if parse analysis will need one.
@@ -1399,7 +1403,7 @@ exec_parse_message(const char *query_string,	/* string to execute */
 		/*
 		 * We just save the CachedPlanSource into unnamed_stmt_psrc.
 		 */
-		SaveCachedPlan(psrc);
+		// SaveCachedPlan(psrc);
 		unnamed_stmt_psrc = psrc;
 	}