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Commit194f29f

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committed
added arguments to create_hash_partitions() to specify partition names and tablespaces
1 parent2d0a3a6 commit194f29f

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2 files changed

+92
-5
lines changed

2 files changed

+92
-5
lines changed

‎hash.sql

Lines changed: 10 additions & 4 deletions
Original file line numberDiff line numberDiff line change
@@ -15,7 +15,9 @@ CREATE OR REPLACE FUNCTION @extschema@.create_hash_partitions(
1515
parent_relidREGCLASS,
1616
attributeTEXT,
1717
partitions_countINTEGER,
18-
partition_dataBOOLEAN DEFAULT TRUE)
18+
partition_dataBOOLEAN DEFAULT TRUE,
19+
relnamesTEXT[] DEFAULTNULL,
20+
tablespacesTEXT[] DEFAULTNULL)
1921
RETURNSINTEGERAS
2022
$$
2123
BEGIN
@@ -39,7 +41,9 @@ BEGIN
3941
/* Create partitions*/
4042
PERFORM @extschema@.create_hash_partitions_internal(parent_relid,
4143
attribute,
42-
partitions_count);
44+
partitions_count,
45+
relnames,
46+
tablespaces);
4347

4448
/* Notify backend about changes*/
4549
PERFORM @extschema@.on_create_partitions(parent_relid);
@@ -275,9 +279,11 @@ $$ LANGUAGE plpgsql;
275279
CREATEOR REPLACE FUNCTION @extschema@.create_hash_partitions_internal(
276280
parent_relidREGCLASS,
277281
attributeTEXT,
278-
partitions_countINTEGER)
282+
partitions_countINTEGER,
283+
relnamesTEXT[] DEFAULTNULL,
284+
tablespacesTEXT[] DEFAULTNULL)
279285
RETURNS VOIDAS'pg_pathman','create_hash_partitions_internal'
280-
LANGUAGE C STRICT;
286+
LANGUAGE C;
281287

282288
/*
283289
* Returns hash function OID for specified type

‎src/pl_hash_funcs.c

Lines changed: 82 additions & 1 deletion
Original file line numberDiff line numberDiff line change
@@ -13,10 +13,13 @@
1313
#include"relation_info.h"
1414
#include"utils.h"
1515

16+
#include"catalog/namespace.h"
17+
#include"catalog/pg_type.h"
1618
#include"utils/builtins.h"
1719
#include"utils/typcache.h"
1820
#include"utils/lsyscache.h"
1921
#include"utils/builtins.h"
22+
#include"utils/array.h"
2023

2124

2225
/* Function declarations */
@@ -29,6 +32,9 @@ PG_FUNCTION_INFO_V1( get_hash_part_idx );
2932
PG_FUNCTION_INFO_V1(build_hash_condition );
3033

3134

35+
staticchar**deconstruct_text_array(Datumarr,int*num_elems);
36+
37+
3238
/*
3339
* Create HASH partitions implementation (written in C).
3440
*/
@@ -41,6 +47,13 @@ create_hash_partitions_internal(PG_FUNCTION_ARGS)
4147
uint32part_count=PG_GETARG_INT32(2),
4248
i;
4349

50+
/* Partitions names and tablespaces */
51+
char**names=NULL,
52+
**tablespaces=NULL;
53+
intnames_size=0,
54+
tablespaces_size=0;
55+
RangeVar**rangevars=NULL;
56+
4457
/* Check that there's no partitions yet */
4558
if (get_pathman_relation_info(parent_relid))
4659
elog(ERROR,"cannot add new HASH partitions");
@@ -49,16 +62,84 @@ create_hash_partitions_internal(PG_FUNCTION_ARGS)
4962
TextDatumGetCString(partitioned_col_name),
5063
false);
5164

65+
/* Get partition names and tablespaces */
66+
if (!PG_ARGISNULL(3))
67+
names=deconstruct_text_array(PG_GETARG_DATUM(3),&names_size);
68+
69+
if (!PG_ARGISNULL(4))
70+
tablespaces=deconstruct_text_array(PG_GETARG_DATUM(4),&tablespaces_size);
71+
72+
/* Convert partition names into RangeVars */
73+
if (names_size>0)
74+
{
75+
rangevars=palloc(sizeof(RangeVar)*names_size);
76+
for (i=0;i<names_size;i++)
77+
{
78+
List*nl=stringToQualifiedNameList(names[i]);
79+
80+
rangevars[i]=makeRangeVarFromNameList(nl);
81+
}
82+
}
83+
5284
for (i=0;i<part_count;i++)
5385
{
86+
RangeVar*rel=rangevars!=NULL ?rangevars[i] :NULL;
87+
char*tablespace=tablespaces!=NULL ?tablespaces[i] :NULL;
88+
5489
/* Create a partition (copy FKs, invoke callbacks etc) */
5590
create_single_hash_partition_internal(parent_relid,i,part_count,
56-
partitioned_col_type,NULL,NULL);
91+
partitioned_col_type,
92+
rel,tablespace);
5793
}
5894

5995
PG_RETURN_VOID();
6096
}
6197

98+
/*
99+
* Convert Datum into cstring array
100+
*/
101+
staticchar**
102+
deconstruct_text_array(Datumarr,int*num_elems)
103+
{
104+
ArrayType*arrayval;
105+
int16elemlen;
106+
boolelembyval;
107+
charelemalign;
108+
Datum*elem_values;
109+
bool*elem_nulls;
110+
int16i;
111+
112+
arrayval=DatumGetArrayTypeP(arr);
113+
114+
Assert(ARR_ELEMTYPE(arrayval)==TEXTOID);
115+
116+
get_typlenbyvalalign(ARR_ELEMTYPE(arrayval),
117+
&elemlen,&elembyval,&elemalign);
118+
deconstruct_array(arrayval,
119+
ARR_ELEMTYPE(arrayval),
120+
elemlen,elembyval,elemalign,
121+
&elem_values,&elem_nulls,num_elems);
122+
123+
/* If there are actual values then convert them into cstrings */
124+
if (num_elems>0)
125+
{
126+
char**strings=palloc(sizeof(char*)**num_elems);
127+
128+
for (i=0;i<*num_elems;i++)
129+
{
130+
if (elem_nulls[i])
131+
elog(ERROR,
132+
"Partition name and tablespace arrays cannot contain nulls");
133+
134+
strings[i]=TextDatumGetCString(elem_values[i]);
135+
}
136+
137+
returnstrings;
138+
}
139+
140+
returnNULL;
141+
}
142+
62143
/*
63144
* Returns hash function's OID for a specified type.
64145
*/

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