Support window functions

Author: knizhnik

Makefile

@@ -6,7 +6,7 @@ OBJS = vops.o
 EXTENSION = vops
 DATA = vops--1.0.sql
 PGFILEDESC = "vops - vectorized operations"
-CUSTOM_COPT = -O3
+CUSTOM_COPT = -O0 -g
 
 REGRESS = test
 

expected/test.out

@@ -64,3 +64,79 @@ select count(*) from v where ifnull(x, 0) >= 0;
     64
 (1 row)
 
+select count(*) from v where coalesce(x, 0.0::float8::vops_float4) >= 0;
+ count 
+-------
+    64
+(1 row)
+
+select unnest(t.*) from (select mcount(*) over w,mcount(x) over w,msum(x) over w,mavg(x) over w,mmin(x) over w,mmax(x) over w,x - lag(x) over w from v window w as (rows between unbounded preceding and current row)) t;
+       unnest       
+--------------------
+ (1,1,1,1,1,1,)
+ (2,2,3,1.5,1,2,1)
+ (3,2,3,1.5,1,2,)
+ (4,3,6,2,1,3,)
+ (5,3,6,2,1,3,)
+ (6,4,10,2.5,1,4,)
+ (7,4,10,2.5,1,4,)
+ (8,4,10,2.5,1,4,)
+ (9,4,10,2.5,1,4,)
+ (10,4,10,2.5,1,4,)
+ (11,4,10,2.5,1,4,)
+ (12,4,10,2.5,1,4,)
+ (13,4,10,2.5,1,4,)
+ (14,4,10,2.5,1,4,)
+ (15,4,10,2.5,1,4,)
+ (16,4,10,2.5,1,4,)
+ (17,4,10,2.5,1,4,)
+ (18,4,10,2.5,1,4,)
+ (19,4,10,2.5,1,4,)
+ (20,4,10,2.5,1,4,)
+ (21,4,10,2.5,1,4,)
+ (22,4,10,2.5,1,4,)
+ (23,4,10,2.5,1,4,)
+ (24,4,10,2.5,1,4,)
+ (25,4,10,2.5,1,4,)
+ (26,4,10,2.5,1,4,)
+ (27,4,10,2.5,1,4,)
+ (28,4,10,2.5,1,4,)
+ (29,4,10,2.5,1,4,)
+ (30,4,10,2.5,1,4,)
+ (31,4,10,2.5,1,4,)
+ (32,4,10,2.5,1,4,)
+ (33,4,10,2.5,1,4,)
+ (34,4,10,2.5,1,4,)
+ (35,4,10,2.5,1,4,)
+ (36,4,10,2.5,1,4,)
+ (37,4,10,2.5,1,4,)
+ (38,4,10,2.5,1,4,)
+ (39,4,10,2.5,1,4,)
+ (40,4,10,2.5,1,4,)
+ (41,4,10,2.5,1,4,)
+ (42,4,10,2.5,1,4,)
+ (43,4,10,2.5,1,4,)
+ (44,4,10,2.5,1,4,)
+ (45,4,10,2.5,1,4,)
+ (46,4,10,2.5,1,4,)
+ (47,4,10,2.5,1,4,)
+ (48,4,10,2.5,1,4,)
+ (49,4,10,2.5,1,4,)
+ (50,4,10,2.5,1,4,)
+ (51,4,10,2.5,1,4,)
+ (52,4,10,2.5,1,4,)
+ (53,4,10,2.5,1,4,)
+ (54,4,10,2.5,1,4,)
+ (55,4,10,2.5,1,4,)
+ (56,4,10,2.5,1,4,)
+ (57,4,10,2.5,1,4,)
+ (58,4,10,2.5,1,4,)
+ (59,4,10,2.5,1,4,)
+ (60,4,10,2.5,1,4,)
+ (61,4,10,2.5,1,4,)
+ (62,4,10,2.5,1,4,)
+ (63,4,10,2.5,1,4,)
+ (64,4,10,2.5,1,4,)
+(64 rows)
+
+ 

sql/test.sql

@@ -12,3 +12,6 @@ select count(*),count(x),sum(x),avg(x),min(x),max(x),variance(x),var_pop(x),var_
 select count(*),count(x),sum(x),avg(x),min(x),max(x),variance(x),var_pop(x),var_samp(x),stddev(x),stddev_pop(x),stddev_samp(x) from v where x > 1.0;
 select count(*),count(x),sum(x),avg(x),min(x),max(x),variance(x),var_pop(x),var_samp(x),stddev(x),stddev_pop(x),stddev_samp(x) from s where x > 1.0;
 select count(*) from v where ifnull(x, 0) >= 0;
+select count(*) from v where coalesce(x, 0.0::float8::vops_float4) >= 0;
+select unnest(t.*) from (select mcount(*) over w,mcount(x) over w,msum(x) over w,mavg(x) over w,mmin(x) over w,mmax(x) over w,x - lag(x) over w from v window w as (rows between unbounded preceding and current row)) t;
+