Re: Interesting question - Mailing list pgsql-hackers

* Larry Rosenman <ler@lerctr.org> [010518 20:25]:
> Greetings,
>     I have made the following table(s),indexes,etc.  I wonder if there
> is an index (or something else), I can create to make the query use a
> "better" plan.  (not that it's slow at the moment, but as the table
> grows...). 
(Oh, one point, this is 7.2devel...)

> 
> Schema:
> 
> --
> -- Selected TOC Entries:
> --
> \connect - neteng
> --
> -- TOC Entry ID 2 (OID 18735)
> --
> -- Name: attack_types_id_seq Type: SEQUENCE Owner: neteng
> --
> 
> CREATE SEQUENCE "attack_types_id_seq" start 1 increment 1 maxvalue 2147483647 minvalue 1  cache 1 ;
> 
> --
> -- TOC Entry ID 3 (OID 18754)
> --
> -- Name: attack_types Type: TABLE Owner: neteng
> --
> 
> CREATE TABLE "attack_types" (
>     "id" integer DEFAULT nextval('"attack_types_id_seq"'::text) NOT NULL,
>     "attack_type" character varying(30),
>     Constraint "attack_types_pkey" Primary Key ("id")
> );
> 
> --
> -- TOC Entry ID 4 (OID 18769)
> --
> -- Name: attack_db Type: TABLE Owner: neteng
> --
> 
> CREATE TABLE "attack_db" (
>     "attack_type" integer,
>     "start_time" timestamp with time zone,
>     "end_time" timestamp with time zone,
>     "src_router" inet,
>     "input_int" integer,
>     "output_int" integer,
>     "src_as" integer,
>     "src_ip" inet,
>     "src_port" integer,
>     "dst_as" integer,
>     "dst_ip" inet,
>     "dst_port" integer,
>     "protocol" integer,
>     "tos" integer,
>     "pr_flags" integer,
>     "pkts" bigint,
>     "bytes" bigint,
>     "next_hop" inet
> );
> 
> --
> -- TOC Entry ID 5 (OID 19897)
> --
> -- Name: protocols Type: TABLE Owner: neteng
> --
> 
> CREATE TABLE "protocols" (
>     "proto" integer,
>     "proto_name" text
> );
> 
> \connect - ler
> --
> -- TOC Entry ID 12 (OID 20362)
> --
> -- Name: "getattack_type" (integer) Type: FUNCTION Owner: ler
> --
> 
> CREATE FUNCTION "getattack_type" (integer) RETURNS text AS 'SELECT CAST(attack_type as text) from attack_types
> where id = $1;' LANGUAGE 'sql';
> 
> --
> -- TOC Entry ID 13 (OID 20462)
> --
> -- Name: "format_port" (integer,integer) Type: FUNCTION Owner: ler
> --
> 
> CREATE FUNCTION "format_port" (integer,integer) RETURNS text AS 'SELECT CASE 
>     WHEN $1 = 1 THEN trim(to_char(($2 >> 8) & 255, ''09'')) || ''-'' ||
>                      trim(to_char($2 & 255,''09''))
>     WHEN $1 > 1 THEN trim(to_char($2,''00009''))
>     END;' LANGUAGE 'sql';
> 
> --
> -- TOC Entry ID 14 (OID 20508)
> --
> -- Name: "get_protocol" (integer) Type: FUNCTION Owner: ler
> --
> 
> CREATE FUNCTION "get_protocol" (integer) RETURNS text AS 'SELECT proto_name FROM protocols
>     WHERE proto = $1;' LANGUAGE 'sql';
> 
> --
> -- TOC Entry ID 15 (OID 20548)
> --
> -- Name: "format_protocol" (integer) Type: FUNCTION Owner: ler
> --
> 
> CREATE FUNCTION "format_protocol" (integer) RETURNS text AS 'SELECT CASE 
>     WHEN get_protocol($1) IS NOT NULL THEN trim(get_protocol($1))
>     ELSE CAST($1 as text)
>     END;' LANGUAGE 'sql';
> 
> --
> -- TOC Entry ID 10 (OID 20816)
> --
> -- Name: "plpgsql_call_handler" () Type: FUNCTION Owner: ler
> --
> 
> CREATE FUNCTION "plpgsql_call_handler" () RETURNS opaque AS '/usr/local/pgsql/lib/plpgsql.so', 'plpgsql_call_handler'
LANGUAGE'C';
 
> 
> --
> -- TOC Entry ID 11 (OID 20817)
> --
> -- Name: plpgsql Type: PROCEDURAL LANGUAGE Owner: 
> --
> 
> CREATE TRUSTED PROCEDURAL LANGUAGE 'plpgsql' HANDLER "plpgsql_call_handler" LANCOMPILER 'PL/pgSQL';
> 
> --
> -- TOC Entry ID 16 (OID 20831)
> --
> -- Name: "tcp_flags" (integer) Type: FUNCTION Owner: ler
> --
> 
> CREATE FUNCTION "tcp_flags" (integer) RETURNS text AS 'DECLARE flag ALIAS for $1;
>             ret text;
> BEGIN 
>      IF (flag & 128) = 128 THEN      ret := ''C'';
>      ELSE ret := '' '';
>      END IF;
>      IF (flag & 64) = 64 THEN ret := ret || ''E'';
>      ELSE ret := ret || '' '';
>      END IF;
>      IF (flag & 32) = 32 THEN ret := ret || ''U'';
>      ELSE ret := ret || '' '';
>      END IF;
>      IF (flag & 16) = 16 THEN ret := ret || ''A'';
>      ELSE ret := ret || '' '';
>      END IF;
>      IF (flag & 8) = 8 THEN   ret := ret || ''P'';
>      ELSE ret := ret || '' '';
>      END IF;
>      IF (flag & 4) = 4 THEN   ret := ret || ''R'';
>      ELSE ret := ret || '' '';
>      END IF;
>      IF (flag & 2) = 2 THEN   ret := ret || ''S'';
>      ELSE ret := ret || '' '';
>      END IF;
>      IF (flag & 1) = 1 THEN   ret := ret || ''F'';
>      ELSE ret := ret || '' '';
>      END IF;
>      RETURN ret;
> END;' LANGUAGE 'plpgsql';
> 
> --
> -- TOC Entry ID 6 (OID 21918)
> --
> -- Name: exempt_ips Type: TABLE Owner: ler
> --
> 
> CREATE TABLE "exempt_ips" (
>     "ip" inet
> );
> 
> --
> -- TOC Entry ID 7 (OID 21918)
> --
> -- Name: exempt_ips Type: ACL Owner: 
> --
> 
> REVOKE ALL on "exempt_ips" from PUBLIC;
> GRANT ALL on "exempt_ips" to PUBLIC;
> GRANT ALL on "exempt_ips" to "ler";
> 
> --
> -- TOC Entry ID 17 (OID 22324)
> --
> -- Name: "format_flags" (integer,integer) Type: FUNCTION Owner: ler
> --
> 
> CREATE FUNCTION "format_flags" (integer,integer) RETURNS text AS 'SELECT CASE 
>     WHEN $1 = 6 THEN tcp_flags($2)
>     ELSE ''N/A''
>     END;' LANGUAGE 'sql';
> 
> \connect - neteng
> --
> -- TOC Entry ID 8 (OID 18769)
> --
> -- Name: "end_index" Type: INDEX Owner: neteng
> --
> 
> CREATE  INDEX "end_index" on "attack_db" using btree ( "end_time" "timestamp_ops" );
> 
> --
> -- TOC Entry ID 9 (OID 18769)
> --
> -- Name: "start_index" Type: INDEX Owner: neteng
> --
> 
> CREATE  INDEX "start_index" on "attack_db" using btree ( "start_time" "timestamp_ops" );
> 
> --
> -- TOC Entry ID 20 (OID 18802)
> --
> -- Name: "RI_ConstraintTrigger_18801" Type: TRIGGER Owner: neteng
> --
> 
> CREATE CONSTRAINT TRIGGER "attack_type" AFTER INSERT OR UPDATE ON "attack_db"  FROM "attack_types" NOT DEFERRABLE
INITIALLYIMMEDIATE FOR EACH ROW EXECUTE PROCEDURE "RI_FKey_check_ins" ('attack_type', 'attack_db', 'attack_types',
'UNSPECIFIED','attack_type', 'id');
 
> 
> --
> -- TOC Entry ID 18 (OID 18804)
> --
> -- Name: "RI_ConstraintTrigger_18803" Type: TRIGGER Owner: neteng
> --
> 
> CREATE CONSTRAINT TRIGGER "attack_type" AFTER DELETE ON "attack_types"  FROM "attack_db" NOT DEFERRABLE INITIALLY
IMMEDIATEFOR EACH ROW EXECUTE PROCEDURE "RI_FKey_noaction_del" ('attack_type', 'attack_db', 'attack_types',
'UNSPECIFIED','attack_type', 'id');
 
> 
> --
> -- TOC Entry ID 19 (OID 18806)
> --
> -- Name: "RI_ConstraintTrigger_18805" Type: TRIGGER Owner: neteng
> --
> 
> CREATE CONSTRAINT TRIGGER "attack_type" AFTER UPDATE ON "attack_types"  FROM "attack_db" NOT DEFERRABLE INITIALLY
IMMEDIATEFOR EACH ROW EXECUTE PROCEDURE "RI_FKey_noaction_upd" ('attack_type', 'attack_db', 'attack_types',
'UNSPECIFIED','attack_type', 'id');
 
> 
> Query: 
>  EXPLAIN
>  SELECT to_char(start_time,'MM/DD/YY') as mmddyy,  
>         to_char(start_time,'HH24:MI:SS') as hhmmss,  
>         getattack_type(attack_type) as type,  
>         src_router as router,  
>         input_int as ii,  
>         output_int as oi,  
>         src_as as srcas,host(src_ip) || '/' || masklen(src_ip) || ':' ||   
>         format_port(protocol,src_port) as src_address,  
>         dst_as as dstas,host(dst_ip) || '/' || masklen(dst_ip) || ':' ||  
>         format_port(protocol,dst_port) as dst_address,  
>         format_protocol(protocol) as prot,  
>         tos,format_flags(protocol,pr_flags) as tcpflags,  
>         pkts,bytes,  
>         bytes/pkts as bytes_per_packet,  
>         to_char(end_time,'MM/DD/YY') as end_mmddyy,  
>         to_char(end_time,'HH24:MI:SS') as end_hhmmss,  
>         next_hop   
>  FROM attack_db   
>  WHERE (start_time >= now() - '02:00:00'::interval OR   
>         end_time >= now() - '02:00:00'::interval)   
>         AND host(src_ip) NOT IN (select host(ip) from exempt_ips)    
>         AND host(dst_ip) NOT IN (select host(ip) from exempt_ips)    
>  ORDER BY bytes DESC;   ;
> 
> 
> Explain Output:
> 
> NOTICE:  QUERY PLAN:
> 
> Sort  (cost=10870.77..10870.77 rows=5259 width=120)
>   ->  Seq Scan on attack_db  (cost=0.00..10358.95 rows=5259 width=120)
>         SubPlan
>           ->  Seq Scan on exempt_ips  (cost=0.00..1.04 rows=4 width=12)
>           ->  Seq Scan on exempt_ips  (cost=0.00..1.04 rows=4 width=12)
> 
> 
> -- 
> Larry Rosenman                     http://www.lerctr.org/~ler
> Phone: +1 972-414-9812                 E-Mail: ler@lerctr.org
> US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749
> 
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-- 
Larry Rosenman                     http://www.lerctr.org/~ler
Phone: +1 972-414-9812                 E-Mail: ler@lerctr.org
US Mail: 1905 Steamboat Springs Drive, Garland, TX 75044-6749