On 16-11-2012 12:27, Hannu Krosing wrote:
> Why not just make the sending SIGHUP a separate command as it is now ?
>
> SELECT pg_reload_config();
>
... or even a RELOAD command. I've already coded a WIP patch for such command.
--
Euler Taveira de Oliveira - Timbira http://www.timbira.com.br/
PostgreSQL: Consultoria, Desenvolvimento, Suporte 24x7 e Treinamento
diff --git a/doc/src/sgml/ref/allfiles.sgml b/doc/src/sgml/ref/allfiles.sgml
index df84054..f7abb57 100644
--- a/doc/src/sgml/ref/allfiles.sgml
+++ b/doc/src/sgml/ref/allfiles.sgml
@@ -137,6 +137,7 @@ Complete list of usable sgml source files in this directory.
<!ENTITY reassignOwned SYSTEM "reassign_owned.sgml">
<!ENTITY reindex SYSTEM "reindex.sgml">
<!ENTITY releaseSavepoint SYSTEM "release_savepoint.sgml">
+<!ENTITY reload SYSTEM "reload.sgml">
<!ENTITY reset SYSTEM "reset.sgml">
<!ENTITY revoke SYSTEM "revoke.sgml">
<!ENTITY rollback SYSTEM "rollback.sgml">
diff --git a/doc/src/sgml/ref/reload.sgml b/doc/src/sgml/ref/reload.sgml
new file mode 100644
index 0000000..42baab9
--- /dev/null
+++ b/doc/src/sgml/ref/reload.sgml
@@ -0,0 +1,51 @@
+<!-- doc/src/sgml/ref/reload.sgml -->
+
+<refentry id="sql-reload">
+ <refmeta>
+ <refentrytitle>RELOAD</refentrytitle>
+ <manvolnum>7</manvolnum>
+ <refmiscinfo>SQL - Language Statements</refmiscinfo>
+ </refmeta>
+
+ <refnamediv>
+ <refname>RELOAD</refname>
+ <refpurpose>reread configuration files</refpurpose>
+ </refnamediv>
+
+ <indexterm zone="sql-reload">
+ <primary>RELOAD</primary>
+ </indexterm>
+
+ <refsynopsisdiv>
+<synopsis>
+RELOAD
+</synopsis>
+ </refsynopsisdiv>
+
+ <refsect1>
+ <title>Description</title>
+
+ <para>
+ The <command>RELOAD</command> command triggers <command>postgres</command> to
+ reread its configuration files (<filename>postgresql.conf</filename>,
+ <filename>pg_hba.conf</filename>, etc.). This allows changing of
+ configuration-file options that do not require a complete restart to take
+ effect. <command>RELOAD</command> command has the same behavior as
+ <command>pg_ctl</command> <option>reload</option> option (see <xref
+ linkend="app-pg-ctl">).
+ </para>
+
+ <para>
+ Only superusers can call <command>RELOAD</command>.
+ </para>
+ </refsect1>
+
+ <refsect1>
+ <title>Compatibility</title>
+
+ <para>
+ The <command>RELOAD</command> command is a
+ <productname>PostgreSQL</productname> language extension.
+ </para>
+ </refsect1>
+</refentry>
diff --git a/doc/src/sgml/reference.sgml b/doc/src/sgml/reference.sgml
index 0872168..ae5fb67 100644
--- a/doc/src/sgml/reference.sgml
+++ b/doc/src/sgml/reference.sgml
@@ -165,6 +165,7 @@
&reassignOwned;
&reindex;
&releaseSavepoint;
+ &reload;
&reset;
&revoke;
&rollback;
diff --git a/src/backend/nodes/copyfuncs.c b/src/backend/nodes/copyfuncs.c
index 9387ee9..5dd6d0e 100644
--- a/src/backend/nodes/copyfuncs.c
+++ b/src/backend/nodes/copyfuncs.c
@@ -4394,6 +4394,9 @@ copyObject(const void *from)
case T_CheckPointStmt:
retval = (void *) makeNode(CheckPointStmt);
break;
+ case T_ReloadStmt:
+ retval = (void *) makeNode(ReloadStmt);
+ break;
case T_CreateSchemaStmt:
retval = _copyCreateSchemaStmt(from);
break;
diff --git a/src/backend/nodes/equalfuncs.c b/src/backend/nodes/equalfuncs.c
index 95a95f4..7118bb6 100644
--- a/src/backend/nodes/equalfuncs.c
+++ b/src/backend/nodes/equalfuncs.c
@@ -2881,6 +2881,9 @@ equal(const void *a, const void *b)
case T_CheckPointStmt:
retval = true;
break;
+ case T_ReloadStmt:
+ retval = true;
+ break;
case T_CreateSchemaStmt:
retval = _equalCreateSchemaStmt(a, b);
break;
diff --git a/src/backend/parser/gram.y b/src/backend/parser/gram.y
index e4ff76e..b853e8f 100644
--- a/src/backend/parser/gram.y
+++ b/src/backend/parser/gram.y
@@ -245,7 +245,7 @@ static void processCASbits(int cas_bits, int location, const char *constrType,
VariableResetStmt VariableSetStmt VariableShowStmt
ViewStmt CheckPointStmt CreateConversionStmt
DeallocateStmt PrepareStmt ExecuteStmt
- DropOwnedStmt ReassignOwnedStmt
+ DropOwnedStmt ReassignOwnedStmt ReloadStmt
AlterTSConfigurationStmt AlterTSDictionaryStmt
%type <node> select_no_parens select_with_parens select_clause
@@ -571,7 +571,7 @@ static void processCASbits(int cas_bits, int location, const char *constrType,
QUOTE
RANGE READ REAL REASSIGN RECHECK RECURSIVE REF REFERENCES REINDEX
- RELATIVE_P RELEASE RENAME REPEATABLE REPLACE REPLICA
+ RELATIVE_P RELEASE RELOAD RENAME REPEATABLE REPLACE REPLICA
RESET RESTART RESTRICT RETURNING RETURNS REVOKE RIGHT ROLE ROLLBACK
ROW ROWS RULE
@@ -794,6 +794,7 @@ stmt :
| PrepareStmt
| ReassignOwnedStmt
| ReindexStmt
+ | ReloadStmt
| RemoveAggrStmt
| RemoveFuncStmt
| RemoveOperStmt
@@ -1657,6 +1658,20 @@ CheckPointStmt:
}
;
+/*****************************************************************************
+ *
+ * RELOAD
+ *
+ *****************************************************************************/
+
+ReloadStmt:
+ RELOAD
+ {
+ ReloadStmt *n = makeNode(ReloadStmt);
+ $$ = (Node *)n;
+ }
+ ;
+
/*****************************************************************************
*
@@ -12605,6 +12620,7 @@ unreserved_keyword:
| REINDEX
| RELATIVE_P
| RELEASE
+ | RELOAD
| RENAME
| REPEATABLE
| REPLACE
diff --git a/src/backend/postmaster/postmaster.c b/src/backend/postmaster/postmaster.c
index b223fee..a0e55df 100644
--- a/src/backend/postmaster/postmaster.c
+++ b/src/backend/postmaster/postmaster.c
@@ -2116,6 +2116,15 @@ reset_shared(int port)
CreateSharedMemoryAndSemaphores(false, port);
}
+/*
+ * RELOAD command -- rereads configuration files
+ */
+void
+ReloadConfiguration(void)
+{
+ signal_child(PostmasterPid, SIGHUP);
+}
+
/*
* SIGHUP -- reread config files, and tell children to do same
diff --git a/src/backend/tcop/utility.c b/src/backend/tcop/utility.c
index 491bd29..5e0f9c9 100644
--- a/src/backend/tcop/utility.c
+++ b/src/backend/tcop/utility.c
@@ -54,6 +54,7 @@
#include "miscadmin.h"
#include "parser/parse_utilcmd.h"
#include "postmaster/bgwriter.h"
+#include "postmaster/postmaster.h"
#include "rewrite/rewriteDefine.h"
#include "rewrite/rewriteRemove.h"
#include "storage/fd.h"
@@ -1258,6 +1259,15 @@ standard_ProcessUtility(Node *parsetree,
(RecoveryInProgress() ? 0 : CHECKPOINT_FORCE));
break;
+ case T_ReloadStmt:
+ if (!superuser())
+ ereport(ERROR,
+ (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
+ errmsg("must be superuser to do RELOAD")));
+
+ ReloadConfiguration();
+ break;
+
case T_ReindexStmt:
{
ReindexStmt *stmt = (ReindexStmt *) parsetree;
@@ -2190,6 +2200,10 @@ CreateCommandTag(Node *parsetree)
tag = "CHECKPOINT";
break;
+ case T_ReloadStmt:
+ tag = "RELOAD";
+ break;
+
case T_ReindexStmt:
tag = "REINDEX";
break;
@@ -2697,6 +2711,10 @@ GetCommandLogLevel(Node *parsetree)
lev = LOGSTMT_ALL;
break;
+ case T_ReloadStmt:
+ lev = LOGSTMT_ALL;
+ break;
+
case T_ReindexStmt:
lev = LOGSTMT_ALL; /* should this be DDL? */
break;
diff --git a/src/include/nodes/nodes.h b/src/include/nodes/nodes.h
index 438a1d9..d9331ad 100644
--- a/src/include/nodes/nodes.h
+++ b/src/include/nodes/nodes.h
@@ -361,6 +361,7 @@ typedef enum NodeTag
T_AlterExtensionContentsStmt,
T_CreateEventTrigStmt,
T_AlterEventTrigStmt,
+ T_ReloadStmt,
/*
* TAGS FOR PARSE TREE NODES (parsenodes.h)
diff --git a/src/include/nodes/parsenodes.h b/src/include/nodes/parsenodes.h
index 8834499..15d400a 100644
--- a/src/include/nodes/parsenodes.h
+++ b/src/include/nodes/parsenodes.h
@@ -2459,6 +2459,15 @@ typedef struct CheckPointStmt
} CheckPointStmt;
/* ----------------------
+ * Reload Statement
+ * ----------------------
+ */
+typedef struct ReloadStmt
+{
+ NodeTag type;
+} ReloadStmt;
+
+/* ----------------------
* Discard Statement
* ----------------------
*/
diff --git a/src/include/parser/kwlist.h b/src/include/parser/kwlist.h
index af60dac..389f201 100644
--- a/src/include/parser/kwlist.h
+++ b/src/include/parser/kwlist.h
@@ -304,6 +304,7 @@ PG_KEYWORD("references", REFERENCES, RESERVED_KEYWORD)
PG_KEYWORD("reindex", REINDEX, UNRESERVED_KEYWORD)
PG_KEYWORD("relative", RELATIVE_P, UNRESERVED_KEYWORD)
PG_KEYWORD("release", RELEASE, UNRESERVED_KEYWORD)
+PG_KEYWORD("reload", RELOAD, UNRESERVED_KEYWORD)
PG_KEYWORD("rename", RENAME, UNRESERVED_KEYWORD)
PG_KEYWORD("repeatable", REPEATABLE, UNRESERVED_KEYWORD)
PG_KEYWORD("replace", REPLACE, UNRESERVED_KEYWORD)
diff --git a/src/include/postmaster/postmaster.h b/src/include/postmaster/postmaster.h
index 0fe7ec2..444f72e 100644
--- a/src/include/postmaster/postmaster.h
+++ b/src/include/postmaster/postmaster.h
@@ -49,6 +49,8 @@ extern const char *progname;
extern void PostmasterMain(int argc, char *argv[]) __attribute__((noreturn));
extern void ClosePostmasterPorts(bool am_syslogger);
+extern void ReloadConfiguration(void);
+
extern int MaxLivePostmasterChildren(void);
#ifdef EXEC_BACKEND
--
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