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Add support for temporary replication slots

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This allows creating temporary replication slots that are removed
automatically at the end of the session or on error.

From: Petr Jelinek <petr.jelinek@2ndquadrant.com>
This commit is contained in:
Peter Eisentraut
2016-12-08 12:00:00 -05:00
parent e7f051b8f9
commit a924c327e2
18 changed files with 237 additions and 51 deletions
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22
src/backend/replication/repl_gram.y
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@@ -77,6 +77,7 @@ Node *replication_parse_result;
%token K_LOGICAL
%token K_SLOT
%token K_RESERVE_WAL
%token K_TEMPORARY
%type <node> command
%type <node> base_backup start_replication start_logical_replication
@@ -89,7 +90,7 @@ Node *replication_parse_result;
%type <defelt> plugin_opt_elem
%type <node> plugin_opt_arg
%type <str> opt_slot
%type <boolval> opt_reserve_wal
%type <boolval> opt_reserve_wal opt_temporary
%%
@@ -183,24 +184,26 @@ base_backup_opt:
;
create_replication_slot:
/* CREATE_REPLICATION_SLOT slot PHYSICAL RESERVE_WAL */
K_CREATE_REPLICATION_SLOT IDENT K_PHYSICAL opt_reserve_wal
/* CREATE_REPLICATION_SLOT slot TEMPORARY PHYSICAL RESERVE_WAL */
K_CREATE_REPLICATION_SLOT IDENT opt_temporary K_PHYSICAL opt_reserve_wal
{
CreateReplicationSlotCmd *cmd;
cmd = makeNode(CreateReplicationSlotCmd);
cmd->kind = REPLICATION_KIND_PHYSICAL;
cmd->slotname = $2;
cmd->reserve_wal = $4;
cmd->temporary = $3;
cmd->reserve_wal = $5;
$$ = (Node *) cmd;
}
/* CREATE_REPLICATION_SLOT slot LOGICAL plugin */
| K_CREATE_REPLICATION_SLOT IDENT K_LOGICAL IDENT
/* CREATE_REPLICATION_SLOT slot TEMPORARY LOGICAL plugin */
| K_CREATE_REPLICATION_SLOT IDENT opt_temporary K_LOGICAL IDENT
{
CreateReplicationSlotCmd *cmd;
cmd = makeNode(CreateReplicationSlotCmd);
cmd->kind = REPLICATION_KIND_LOGICAL;
cmd->slotname = $2;
cmd->plugin = $4;
cmd->temporary = $3;
cmd->plugin = $5;
$$ = (Node *) cmd;
}
;
@@ -276,6 +279,11 @@ opt_reserve_wal:
| /* EMPTY */ { $$ = false; }
;
opt_temporary:
K_TEMPORARY { $$ = true; }
| /* EMPTY */ { $$ = false; }
;
opt_slot:
K_SLOT IDENT
{ $$ = $2; }