Review uses of IsUnderPostmaster, change some tests to look at

whereToSendOutput instead because they are really inquiring about
the correct client communication protocol.  Update some comments.
This is pointing towards supporting regular FE/BE client protocol
in a standalone backend, per discussion a month or so back.

diff --git a/src/backend/access/transam/slru.c b/src/backend/access/transam/slru.c
index 73c481c46b7d6b4a9e5275d3ccc2d750c8c9addc..ba3054f14bbbbe52e94c2dd5c5f9541702552beb 100644 (file)
--- a/src/backend/access/transam/slru.c
+++ b/src/backend/access/transam/slru.c
@@ -6,7 +6,7 @@
  * Portions Copyright (c) 1996-2003, PostgreSQL Global Development Group
  * Portions Copyright (c) 1994, Regents of the University of California
  *
- * $PostgreSQL: pgsql/src/backend/access/transam/slru.c,v 1.9 2004/01/26 22:35:31 tgl Exp $
+ * $PostgreSQL: pgsql/src/backend/access/transam/slru.c,v 1.10 2004/01/28 21:02:39 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -184,14 +184,12 @@ SimpleLruInit(SlruCtl ctl, const char *name, const char *subdir)
    shared = (SlruShared) ptr;
 
 #ifdef EXEC_BACKEND
-
    /*
     * Locks are in shared memory
     */
    locks = (SlruLock) (ptr + MAXALIGN(sizeof(SlruSharedData)) +
                        BLCKSZ * NUM_CLOG_BUFFERS);
 #else
-
    /*
     * Locks are in private memory
     */
@@ -200,10 +198,9 @@ SimpleLruInit(SlruCtl ctl, const char *name, const char *subdir)
    Assert(locks);
 #endif
 
-
    if (!IsUnderPostmaster)
-       /* Initialize locks and shared memory area */
    {
+       /* Initialize locks and shared memory area */
        char       *bufptr;
        int         slotno;
 
@@ -229,11 +226,9 @@ SimpleLruInit(SlruCtl ctl, const char *name, const char *subdir)
    else
        Assert(found);
 
-
    ctl->locks = locks;
    ctl->shared = shared;
 
-
    /* Init directory path */
    snprintf(ctl->Dir, MAXPGPATH, "%s/%s", DataDir, subdir);
 }

diff --git a/src/backend/catalog/index.c b/src/backend/catalog/index.c
index 91c951362157144d093087d6373dde2d180ac822..4180526301ac50cd73180e22b62777729afef95e 100644 (file)
--- a/src/backend/catalog/index.c
+++ b/src/backend/catalog/index.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/catalog/index.c,v 1.225 2004/01/07 18:56:25 neilc Exp $
+ *   $PostgreSQL: pgsql/src/backend/catalog/index.c,v 1.226 2004/01/28 21:02:39 tgl Exp $
  *
  *
  * INTERFACE ROUTINES
@@ -508,8 +508,9 @@ index_create(Oid heapRelationId,
     * We cannot allow indexing a shared relation after initdb (because
     * there's no way to make the entry in other databases' pg_class).
     * Unfortunately we can't distinguish initdb from a manually started
-    * standalone backend.  However, we can at least prevent this mistake
-    * under normal multi-user operation.
+    * standalone backend (toasting of shared rels happens after the bootstrap
+    * phase, so checking IsBootstrapProcessingMode() won't work).  However,
+    * we can at least prevent this mistake under normal multi-user operation.
     */
    if (shared_relation && IsUnderPostmaster)
        ereport(ERROR,

diff --git a/src/backend/commands/copy.c b/src/backend/commands/copy.c
index b5b3cfeefac0b67ac0e942023f744695cae67a15..66850d32d56229523972129e428d14b6b9b3d96f 100644 (file)
--- a/src/backend/commands/copy.c
+++ b/src/backend/commands/copy.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/copy.c,v 1.216 2004/01/26 22:35:31 tgl Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/copy.c,v 1.217 2004/01/28 21:02:39 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -829,7 +829,7 @@ DoCopy(const CopyStmt *stmt)
        }
        if (pipe)
        {
-           if (IsUnderPostmaster)
+           if (whereToSendOutput == Remote)
                ReceiveCopyBegin(binary, length(attnumlist));
            else
                copy_file = stdin;
@@ -879,7 +879,7 @@ DoCopy(const CopyStmt *stmt)
        }
        if (pipe)
        {
-           if (IsUnderPostmaster)
+           if (whereToSendOutput == Remote)
                SendCopyBegin(binary, length(attnumlist));
            else
                copy_file = stdout;
@@ -929,7 +929,7 @@ DoCopy(const CopyStmt *stmt)
                     errmsg("could not write to file \"%s\": %m",
                            filename)));
    }
-   else if (IsUnderPostmaster && !is_from)
+   else if (whereToSendOutput == Remote && !is_from)
        SendCopyEnd(binary);
    pfree(attribute_buf.data);
    pfree(line_buf.data);

diff --git a/src/backend/commands/tablecmds.c b/src/backend/commands/tablecmds.c
index 7b6888918bd47a202ef3bdace0a022689f17441b..809f425bc656a72b71a67ee52e283a6efb598aea 100644 (file)
--- a/src/backend/commands/tablecmds.c
+++ b/src/backend/commands/tablecmds.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.96 2004/01/23 02:13:11 neilc Exp $
+ *   $PostgreSQL: pgsql/src/backend/commands/tablecmds.c,v 1.97 2004/01/28 21:02:39 tgl Exp $
  *
  *-------------------------------------------------------------------------
  */
@@ -4027,8 +4027,9 @@ AlterTableCreateToastTable(Oid relOid, bool silent)
     * We cannot allow toasting a shared relation after initdb (because
     * there's no way to mark it toasted in other databases' pg_class).
     * Unfortunately we can't distinguish initdb from a manually started
-    * standalone backend.  However, we can at least prevent this mistake
-    * under normal multi-user operation.
+    * standalone backend (toasting happens after the bootstrap phase,
+    * so checking IsBootstrapProcessingMode() won't work).  However, we can
+    * at least prevent this mistake under normal multi-user operation.
     */
    shared_relation = rel->rd_rel->relisshared;
    if (shared_relation && IsUnderPostmaster)

diff --git a/src/backend/postmaster/pgstat.c b/src/backend/postmaster/pgstat.c
index b684f01c1199d1fd92f75cab154f480a65b839c3..606240c86eb20ae5c14e631315084c5e9067b3bd 100644 (file)
--- a/src/backend/postmaster/pgstat.c
+++ b/src/backend/postmaster/pgstat.c
@@ -13,7 +13,7 @@
  *
  * Copyright (c) 2001-2003, PostgreSQL Global Development Group
  *
- * $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.56 2004/01/26 22:59:53 momjian Exp $
+ * $PostgreSQL: pgsql/src/backend/postmaster/pgstat.c,v 1.57 2004/01/28 21:02:40 tgl Exp $
  * ----------
  */
 #include "postgres.h"
@@ -1339,6 +1339,12 @@ pgstat_mainInit(void)
 {
    IsUnderPostmaster = true;   /* we are a postmaster subprocess now */
 
+#ifdef EXEC_BACKEND
+   /* In EXEC case we will not have inherited these settings */
+   IsPostmasterEnvironment = true;
+   whereToSendOutput = None;
+#endif
+
    MyProcPid = getpid();       /* reset MyProcPid */
 
    /* Lose the postmaster's on-exit routines */

diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index ada86268e38dc3d85e493f32c28863cf2ae460f9..b10d4fd351af5f7ed241831bd281d454bf7a2c19 100644 (file)
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -37,7 +37,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.363 2004/01/27 00:45:26 momjian Exp $
+ *   $PostgreSQL: pgsql/src/backend/postmaster/postmaster.c,v 1.364 2004/01/28 21:02:40 tgl Exp $
  *
  * NOTES
  *
@@ -2697,6 +2697,10 @@ SubPostmasterMain(int argc, char* argv[])
    /* Do this sooner rather than later... */
    IsUnderPostmaster = true;   /* we are a postmaster subprocess now */
 
+   /* In EXEC case we will not have inherited these settings */
+   IsPostmasterEnvironment = true;
+   whereToSendOutput = None;
+
    /* Setup global context */
    MemoryContextInit();
    InitializeGUCOptions();
@@ -2994,6 +2998,14 @@ SSDataBaseInit(int xlop)
    IsUnderPostmaster = true;       /* we are a postmaster subprocess
                                     * now */
 
+#ifdef EXEC_BACKEND
+   /* In EXEC case we will not have inherited these settings */
+   IsPostmasterEnvironment = true;
+   whereToSendOutput = None;
+#endif
+
+   MyProcPid = getpid();       /* reset MyProcPid */
+
    /* Lose the postmaster's on-exit routines and port connections */
    on_exit_reset();
 

diff --git a/src/backend/tcop/postgres.c b/src/backend/tcop/postgres.c
index 2a40b34261ec0922eb3c5a8ae0da0724fe884cf0..4f62112714bdb085cfa3c6fa0247d525f51b659b 100644 (file)
--- a/src/backend/tcop/postgres.c
+++ b/src/backend/tcop/postgres.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.386 2004/01/26 22:59:53 momjian Exp $
+ *   $PostgreSQL: pgsql/src/backend/tcop/postgres.c,v 1.387 2004/01/28 21:02:40 tgl Exp $
  *
  * NOTES
  *   this is the "main" module of the postgres backend and
@@ -392,7 +392,7 @@ ReadCommand(StringInfo inBuf)
 {
    int         result;
 
-   if (IsUnderPostmaster)
+   if (whereToSendOutput == Remote)
        result = SocketBackend(inBuf);
    else
        result = InteractiveBackend(inBuf);
@@ -2627,8 +2627,8 @@ PostgresMain(int argc, char *argv[], const char *username)
        /* Need not flush since ReadyForQuery will do it. */
    }
 
-   /* Welcome banner for non-frontend case */
-   if (!IsUnderPostmaster)
+   /* Welcome banner for standalone case */
+   if (whereToSendOutput == Debug)
        printf("\nPostgreSQL stand-alone backend %s\n", PG_VERSION);
 
    /*

diff --git a/src/backend/utils/init/globals.c b/src/backend/utils/init/globals.c
index 56058fa05cc687026415a7feb4faa9558a96bc3f..3bddad4685a510e4e6cf6b870c6068c5b779f472 100644 (file)
--- a/src/backend/utils/init/globals.c
+++ b/src/backend/utils/init/globals.c
@@ -8,7 +8,7 @@
  *
  *
  * IDENTIFICATION
- *   $PostgreSQL: pgsql/src/backend/utils/init/globals.c,v 1.80 2004/01/26 22:59:53 momjian Exp $
+ *   $PostgreSQL: pgsql/src/backend/utils/init/globals.c,v 1.81 2004/01/28 21:02:40 tgl Exp $
  *
  * NOTES
  *   Globals used all over the place should be declared here and not
@@ -53,9 +53,19 @@ BackendId    MyBackendId;
 char      *DatabasePath = NULL;
 Oid            MyDatabaseId = InvalidOid;
 
-pid_t PostmasterPid = 0;
+pid_t      PostmasterPid = 0;
 
-/* these are initialized for the bootstrap/standalone case: */
+/*
+ * IsPostmasterEnvironment is true in a postmaster process and any postmaster
+ * child process; it is false in a standalone process (bootstrap or
+ * standalone backend).  IsUnderPostmaster is true in postmaster child
+ * processes.  Note that "child process" includes all children, not only
+ * regular backends.  These should be set correctly as early as possible
+ * in the execution of a process, so that error handling will do the right
+ * things if an error should occur during process initialization.
+ *
+ * These are initialized for the bootstrap/standalone case.
+ */
 bool       IsPostmasterEnvironment = false;
 bool       IsUnderPostmaster = false;