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Syntax support and documentation for event triggers.

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They don't actually do anything yet; that will get fixed in a
follow-on commit.  But this gets the basic infrastructure in place,
including CREATE/ALTER/DROP EVENT TRIGGER; support for COMMENT,
SECURITY LABEL, and ALTER EXTENSION .. ADD/DROP EVENT TRIGGER;
pg_dump and psql support; and documentation for the anticipated
initial feature set.

Dimitri Fontaine, with review and a bunch of additional hacking by me.
Thom Brown extensively reviewed earlier versions of this patch set,
but there's not a whole lot of that code left in this commit, as it
turns out.
This commit is contained in:
Robert Haas
2012-07-18 10:16:16 -04:00
parent faf26bf117
commit 3855968f32
56 changed files with 2398 additions and 18 deletions
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113
src/backend/parser/gram.y
View File

@ -55,6 +55,7 @@
#include "catalog/namespace.h"
#include "catalog/pg_trigger.h"
#include "commands/defrem.h"
#include "commands/trigger.h"
#include "nodes/makefuncs.h"
#include "nodes/nodeFuncs.h"
#include "parser/gramparse.h"
@ -194,6 +195,7 @@ static void processCASbits(int cas_bits, int location, const char *constrType,
}
%type <node> stmt schema_stmt
AlterEventTrigStmt
AlterDatabaseStmt AlterDatabaseSetStmt AlterDomainStmt AlterEnumStmt
AlterFdwStmt AlterForeignServerStmt AlterGroupStmt
AlterObjectSchemaStmt AlterOwnerStmt AlterSeqStmt AlterTableStmt
@ -207,7 +209,7 @@ static void processCASbits(int cas_bits, int location, const char *constrType,
CreateOpFamilyStmt AlterOpFamilyStmt CreatePLangStmt
CreateSchemaStmt CreateSeqStmt CreateStmt CreateTableSpaceStmt
CreateFdwStmt CreateForeignServerStmt CreateForeignTableStmt
CreateAssertStmt CreateTrigStmt
CreateAssertStmt CreateTrigStmt CreateEventTrigStmt
CreateUserStmt CreateUserMappingStmt CreateRoleStmt
CreatedbStmt DeclareCursorStmt DefineStmt DeleteStmt DiscardStmt DoStmt
DropGroupStmt DropOpClassStmt DropOpFamilyStmt DropPLangStmt DropStmt
@ -268,6 +270,10 @@ static void processCASbits(int cas_bits, int location, const char *constrType,
%type <value> TriggerFuncArg
%type <node> TriggerWhen
%type <list> event_trigger_when_list event_trigger_value_list
%type <defelt> event_trigger_when_item
%type <chr> enable_trigger
%type <str> copy_file_name
database_name access_method_clause access_method attr_name
name cursor_name file_name
@ -505,7 +511,7 @@ static void processCASbits(int cas_bits, int location, const char *constrType,
DEFERRABLE DEFERRED DEFINER DELETE_P DELIMITER DELIMITERS DESC
DICTIONARY DISABLE_P DISCARD DISTINCT DO DOCUMENT_P DOMAIN_P DOUBLE_P DROP
EACH ELSE ENABLE_P ENCODING ENCRYPTED END_P ENUM_P ESCAPE EXCEPT
EACH ELSE ENABLE_P ENCODING ENCRYPTED END_P ENUM_P ESCAPE EVENT EXCEPT
EXCLUDE EXCLUDING EXCLUSIVE EXECUTE EXISTS EXPLAIN
EXTENSION EXTERNAL EXTRACT
@ -674,7 +680,8 @@ stmtmulti: stmtmulti ';' stmt
;
stmt :
AlterDatabaseStmt
AlterEventTrigStmt
| AlterDatabaseStmt
| AlterDatabaseSetStmt
| AlterDefaultPrivilegesStmt
| AlterDomainStmt
@ -725,6 +732,7 @@ stmt :
| CreateStmt
| CreateTableSpaceStmt
| CreateTrigStmt
| CreateEventTrigStmt
| CreateRoleStmt
| CreateUserStmt
| CreateUserMappingStmt
@ -3554,6 +3562,15 @@ AlterExtensionContentsStmt:
n->objname = list_make1(makeString($6));
$$ = (Node *)n;
}
| ALTER EXTENSION name add_drop EVENT TRIGGER name
{
AlterExtensionContentsStmt *n = makeNode(AlterExtensionContentsStmt);
n->extname = $3;
n->action = $4;
n->objtype = OBJECT_EVENT_TRIGGER;
n->objname = list_make1(makeString($7));
$$ = (Node *)n;
}
| ALTER EXTENSION name add_drop TABLE any_name
{
AlterExtensionContentsStmt *n = makeNode(AlterExtensionContentsStmt);
@ -4282,6 +4299,75 @@ DropTrigStmt:
;
/*****************************************************************************
*
* QUERIES :
* CREATE EVENT TRIGGER ...
* DROP EVENT TRIGGER ...
* ALTER EVENT TRIGGER ...
*
*****************************************************************************/
CreateEventTrigStmt:
CREATE EVENT TRIGGER name ON ColLabel
EXECUTE PROCEDURE func_name '(' ')'
{
CreateEventTrigStmt *n = makeNode(CreateEventTrigStmt);
n->trigname = $4;
n->eventname = $6;
n->whenclause = NULL;
n->funcname = $9;
$$ = (Node *)n;
}
| CREATE EVENT TRIGGER name ON ColLabel
WHEN event_trigger_when_list
EXECUTE PROCEDURE func_name '(' ')'
{
CreateEventTrigStmt *n = makeNode(CreateEventTrigStmt);
n->trigname = $4;
n->eventname = $6;
n->whenclause = $8;
n->funcname = $11;
$$ = (Node *)n;
}
;
event_trigger_when_list:
event_trigger_when_item
{ $$ = list_make1($1); }
| event_trigger_when_list AND event_trigger_when_item
{ $$ = lappend($1, $3); }
;
event_trigger_when_item:
ColId IN_P '(' event_trigger_value_list ')'
{ $$ = makeDefElem($1, (Node *) $4); }
;
event_trigger_value_list:
SCONST
{ $$ = list_make1(makeString($1)); }
| event_trigger_value_list ',' SCONST
{ $$ = lappend($1, makeString($3)); }
;
AlterEventTrigStmt:
ALTER EVENT TRIGGER name enable_trigger
{
AlterEventTrigStmt *n = makeNode(AlterEventTrigStmt);
n->trigname = $4;
n->tgenabled = $5;
$$ = (Node *) n;
}
;
enable_trigger:
ENABLE_P { $$ = TRIGGER_FIRES_ON_ORIGIN; }
| ENABLE_P REPLICA { $$ = TRIGGER_FIRES_ON_REPLICA; }
| ENABLE_P ALWAYS { $$ = TRIGGER_FIRES_ALWAYS; }
| DISABLE_P { $$ = TRIGGER_DISABLED; }
;
/*****************************************************************************
*
* QUERIES :
@ -4868,6 +4954,7 @@ drop_type: TABLE { $$ = OBJECT_TABLE; }
| VIEW { $$ = OBJECT_VIEW; }
| INDEX { $$ = OBJECT_INDEX; }
| FOREIGN TABLE { $$ = OBJECT_FOREIGN_TABLE; }
| EVENT TRIGGER { $$ = OBJECT_EVENT_TRIGGER; }
| TYPE_P { $$ = OBJECT_TYPE; }
| DOMAIN_P { $$ = OBJECT_DOMAIN; }
| COLLATION { $$ = OBJECT_COLLATION; }
@ -4931,7 +5018,7 @@ opt_restart_seqs:
* EXTENSION | ROLE | TEXT SEARCH PARSER |
* TEXT SEARCH DICTIONARY | TEXT SEARCH TEMPLATE |
* TEXT SEARCH CONFIGURATION | FOREIGN TABLE |
* FOREIGN DATA WRAPPER | SERVER ] <objname> |
* FOREIGN DATA WRAPPER | SERVER | EVENT TRIGGER ] <objname> |
* AGGREGATE <aggname> (arg1, ...) |
* FUNCTION <funcname> (arg1, arg2, ...) |
* OPERATOR <op> (leftoperand_typ, rightoperand_typ) |
@ -5113,6 +5200,7 @@ comment_type:
| FOREIGN TABLE { $$ = OBJECT_FOREIGN_TABLE; }
| SERVER { $$ = OBJECT_FOREIGN_SERVER; }
| FOREIGN DATA_P WRAPPER { $$ = OBJECT_FDW; }
| EVENT TRIGGER { $$ = OBJECT_EVENT_TRIGGER; }
;
comment_text:
@ -5195,6 +5283,7 @@ opt_provider: FOR ColId_or_Sconst { $$ = $2; }
security_label_type:
COLUMN { $$ = OBJECT_COLUMN; }
| DATABASE { $$ = OBJECT_DATABASE; }
| EVENT TRIGGER { $$ = OBJECT_EVENT_TRIGGER; }
| FOREIGN TABLE { $$ = OBJECT_FOREIGN_TABLE; }
| SCHEMA { $$ = OBJECT_SCHEMA; }
| SEQUENCE { $$ = OBJECT_SEQUENCE; }
@ -6850,6 +6939,14 @@ RenameStmt: ALTER AGGREGATE func_name aggr_args RENAME TO name
n->missing_ok = false;
$$ = (Node *)n;
}
| ALTER EVENT TRIGGER name RENAME TO name
{
RenameStmt *n = makeNode(RenameStmt);
n->renameType = OBJECT_EVENT_TRIGGER;
n->subname = $4;
n->newname = $7;
$$ = (Node *)n;
}
| ALTER ROLE RoleId RENAME TO RoleId
{
RenameStmt *n = makeNode(RenameStmt);
@ -7329,6 +7426,14 @@ AlterOwnerStmt: ALTER AGGREGATE func_name aggr_args OWNER TO RoleId
n->newowner = $6;
$$ = (Node *)n;
}
| ALTER EVENT TRIGGER name OWNER TO RoleId
{
AlterOwnerStmt *n = makeNode(AlterOwnerStmt);
n->objectType = OBJECT_EVENT_TRIGGER;
n->object = list_make1(makeString($4));
n->newowner = $7;
$$ = (Node *)n;
}
;