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|
%{
/*-------------------------------------------------------------------------
*
* repl_gram.y - Parser for the replication commands
*
* Portions Copyright (c) 1996-2014, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
*
* IDENTIFICATION
* src/backend/replication/repl_gram.y
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include "access/xlogdefs.h"
#include "nodes/makefuncs.h"
#include "nodes/replnodes.h"
#include "replication/walsender.h"
#include "replication/walsender_private.h"
/* Result of the parsing is returned here */
Node *replication_parse_result;
/*
* Bison doesn't allocate anything that needs to live across parser calls,
* so we can easily have it use palloc instead of malloc. This prevents
* memory leaks if we error out during parsing. Note this only works with
* bison >= 2.0. However, in bison 1.875 the default is to use alloca()
* if possible, so there's not really much problem anyhow, at least if
* you're building with gcc.
*/
#define YYMALLOC palloc
#define YYFREE pfree
%}
%expect 0
%name-prefix="replication_yy"
%union {
char *str;
bool boolval;
uint32 uintval;
XLogRecPtr recptr;
Node *node;
List *list;
DefElem *defelt;
}
/* Non-keyword tokens */
%token <str> SCONST IDENT
%token <uintval> UCONST
%token <recptr> RECPTR
/* Keyword tokens. */
%token K_BASE_BACKUP
%token K_IDENTIFY_SYSTEM
%token K_START_REPLICATION
%token K_CREATE_REPLICATION_SLOT
%token K_DROP_REPLICATION_SLOT
%token K_TIMELINE_HISTORY
%token K_LABEL
%token K_PROGRESS
%token K_FAST
%token K_NOWAIT
%token K_WAL
%token K_TIMELINE
%token K_PHYSICAL
%token K_SLOT
%type <node> command
%type <node> base_backup start_replication create_replication_slot drop_replication_slot identify_system timeline_history
%type <list> base_backup_opt_list
%type <defelt> base_backup_opt
%type <uintval> opt_timeline
%type <str> opt_slot
%%
firstcmd: command opt_semicolon
{
replication_parse_result = $1;
}
;
opt_semicolon: ';'
| /* EMPTY */
;
command:
identify_system
| base_backup
| start_replication
| create_replication_slot
| drop_replication_slot
| timeline_history
;
/*
* IDENTIFY_SYSTEM
*/
identify_system:
K_IDENTIFY_SYSTEM
{
$$ = (Node *) makeNode(IdentifySystemCmd);
}
;
/*
* BASE_BACKUP [LABEL '<label>'] [PROGRESS] [FAST] [WAL] [NOWAIT]
*/
base_backup:
K_BASE_BACKUP base_backup_opt_list
{
BaseBackupCmd *cmd = (BaseBackupCmd *) makeNode(BaseBackupCmd);
cmd->options = $2;
$$ = (Node *) cmd;
}
;
base_backup_opt_list:
base_backup_opt_list base_backup_opt
{ $$ = lappend($1, $2); }
| /* EMPTY */
{ $$ = NIL; }
;
base_backup_opt:
K_LABEL SCONST
{
$$ = makeDefElem("label",
(Node *)makeString($2));
}
| K_PROGRESS
{
$$ = makeDefElem("progress",
(Node *)makeInteger(TRUE));
}
| K_FAST
{
$$ = makeDefElem("fast",
(Node *)makeInteger(TRUE));
}
| K_WAL
{
$$ = makeDefElem("wal",
(Node *)makeInteger(TRUE));
}
| K_NOWAIT
{
$$ = makeDefElem("nowait",
(Node *)makeInteger(TRUE));
}
;
/* CREATE_REPLICATION_SLOT SLOT slot PHYSICAL */
create_replication_slot:
K_CREATE_REPLICATION_SLOT IDENT K_PHYSICAL
{
CreateReplicationSlotCmd *cmd;
cmd = makeNode(CreateReplicationSlotCmd);
cmd->kind = REPLICATION_KIND_PHYSICAL;
cmd->slotname = $2;
$$ = (Node *) cmd;
}
;
/* DROP_REPLICATION_SLOT SLOT slot */
drop_replication_slot:
K_DROP_REPLICATION_SLOT IDENT
{
DropReplicationSlotCmd *cmd;
cmd = makeNode(DropReplicationSlotCmd);
cmd->slotname = $2;
$$ = (Node *) cmd;
}
;
/*
* START_REPLICATION [SLOT slot] [PHYSICAL] %X/%X [TIMELINE %d]
*/
start_replication:
K_START_REPLICATION opt_slot opt_physical RECPTR opt_timeline
{
StartReplicationCmd *cmd;
cmd = makeNode(StartReplicationCmd);
cmd->kind = REPLICATION_KIND_PHYSICAL;
cmd->slotname = $2;
cmd->startpoint = $4;
cmd->timeline = $5;
$$ = (Node *) cmd;
}
;
opt_timeline:
K_TIMELINE UCONST
{
if ($2 <= 0)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
(errmsg("invalid timeline %u", $2))));
$$ = $2;
}
| /* EMPTY */
{ $$ = 0; }
;
/*
* TIMELINE_HISTORY %d
*/
timeline_history:
K_TIMELINE_HISTORY UCONST
{
TimeLineHistoryCmd *cmd;
if ($2 <= 0)
ereport(ERROR,
(errcode(ERRCODE_SYNTAX_ERROR),
(errmsg("invalid timeline %u", $2))));
cmd = makeNode(TimeLineHistoryCmd);
cmd->timeline = $2;
$$ = (Node *) cmd;
}
;
opt_physical:
K_PHYSICAL
| /* EMPTY */
;
opt_slot:
K_SLOT IDENT
{ $$ = $2; }
| /* EMPTY */
{ $$ = NULL; }
;
%%
#include "repl_scanner.c"
|
