-
Notifications
You must be signed in to change notification settings - Fork 5
/
schema.c
161 lines (147 loc) · 6.17 KB
/
schema.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
#include "schema.h"
#include "record.h"
#include "util.h"
#include "status.h"
#include <stdlib.h>
#include <string.h>
typedef void (*kvs_schema_serializer)(const kvs_column **keys, size_t key_size, const kvs_column **values, size_t value_size, kvs_record *record, kvs_buffer *key, kvs_buffer *value, void *opaque);
typedef void (*kvs_schema_codec_destructor)(const kvs_column **keys, size_t key_size, const kvs_column **values, size_t value_size, void *opaque);
typedef void (*kvs_schema_deserializer)(const kvs_column **keys, size_t key_size, const kvs_column **values, size_t value_size, kvs_buffer *key, kvs_buffer *value, void *opaque, kvs_record *dest);
struct kvs_schema {
kvs_column *columns;
kvs_variant **dfts;
size_t size;
const kvs_column **keys;
size_t key_size;
const kvs_column **values;
size_t value_size;
void *codec;
kvs_schema_serializer serializer;
kvs_schema_deserializer deserializer;
kvs_schema_codec_destructor codec_destructor;
};
struct kvs_schema_projection {
size_t *index;
};
#define __KVS_SCHEMA_INTERNAL_H__
#include "interpret.h"
#include "prepared.h"
#include "jit.h"
#undef __KVS_SCHEMA_INTERNAL_H__
kvs_schema *kvs_schema_create(const kvs_column *columns, size_t size, int32_t flags) {
size_t idx, fixed = 0, varlen, fixed_size, key_size = 0, key = 0, value = 0;
kvs_schema *schema;
kvs_column *current;
for (idx = 0; idx < size; ++idx) {
if (columns[idx].pk) {
key_size++;
}
}
if (key_size == 0) {
return NULL;
}
schema = malloc(sizeof(kvs_schema) + (sizeof(kvs_column) * size) + (sizeof(kvs_column *) * size) + (sizeof(kvs_variant *) * size));
schema->columns = KVS_UNSAFE_CAST(schema, sizeof(kvs_schema));
schema->keys = KVS_UNSAFE_CAST(schema->columns, sizeof(kvs_column) * size);
schema->values = KVS_UNSAFE_CAST(schema->keys, sizeof(kvs_column *) * key_size);
schema->dfts = KVS_UNSAFE_CAST(schema->values, sizeof(kvs_column *) * (size - key_size));
schema->size = size;
varlen = size;
for (idx = 0; idx < size; ++idx) {
if ((fixed_size = kvs_variant_type_size(columns[idx].type)) != 0) {
schema->dfts[fixed] = kvs_variant_create(columns[idx].type);
*(current = schema->columns + fixed) = columns[idx];
current->index = fixed++;
} else {
schema->dfts[--varlen] = kvs_variant_create(columns[idx].type);
*(current = schema->columns + (varlen)) = columns[idx];
current->index = varlen;
}
current->name = strdup(columns[idx].name);
if (current->pk) {
schema->keys[key++] = current;
} else {
schema->values[value++] = current;
}
}
schema->key_size = key_size;
schema->value_size = size - key_size;
if ((flags & KVS_SCHEMA_FLAG_JIT) == KVS_SCHEMA_FLAG_JIT) {
schema->serializer = kvs_schema_jit_serializer;
schema->deserializer = kvs_schema_jit_deserializer;
schema->codec = kvs_schema_jit_codec_create(schema->keys, schema->key_size, schema->values, schema->value_size);
schema->codec_destructor = kvs_schema_jit_codec_destroy;
} else if ((flags & KVS_SCHEMA_FLAG_PREPARED) == KVS_SCHEMA_FLAG_PREPARED) {
schema->serializer = kvs_schema_prepared_serializer;
schema->deserializer = kvs_schema_prepared_deserializer;
schema->codec = kvs_schema_prepared_codec_create(schema->keys, schema->key_size, schema->values, schema->value_size);
schema->codec_destructor = kvs_schema_prepared_codec_destroy;
} else {
schema->serializer = kvs_schema_interpret_serializer;
schema->deserializer = kvs_schema_interpret_deserializer;
schema->codec = kvs_schema_interpret_codec_create(schema->keys, schema->key_size, schema->values, schema->value_size);
schema->codec_destructor = kvs_schema_interpret_codec_destroy;
}
if (schema->codec == NULL) {
kvs_schema_destroy(schema);
schema = NULL;
}
return schema;
}
void kvs_schema_destroy(kvs_schema *schema) {
size_t idx;
for (idx = 0; idx < schema->size; ++idx) {
kvs_variant_destroy(schema->dfts[idx]);
free((char *) schema->columns[idx].name);
}
schema->codec_destructor(schema->keys, schema->key_size, schema->values, schema->value_size, schema->codec);
free(schema);
}
kvs_record *kvs_schema_record_create(const kvs_schema *schema) {
return kvs_record_create(schema->dfts, schema->size);
}
void kvs_schema_record_serialize(const kvs_schema *schema, kvs_record *record, kvs_buffer *key, kvs_buffer *value) {
schema->serializer(schema->keys, schema->key_size, schema->values, schema->value_size, record, key, value, schema->codec);
}
void kvs_schema_record_deserialize(const kvs_schema *schema, kvs_buffer *key, kvs_buffer *value, kvs_record *dest) {
schema->deserializer(schema->keys, schema->key_size, schema->values, schema->value_size, key, value, schema->codec, dest);
}
static kvs_status kvs_schema_column_lookup(const kvs_schema *schema, const char *column, size_t *index) {
/* TODO implement this with hash lookup */
size_t idx;
for (idx = 0; idx < schema->size; ++idx) {
if (strcasecmp(schema->columns[idx].name, column) == 0) {
*index = schema->columns[idx].index;
return KVS_OK;
}
}
return KVS_SCHEMA_COLUMN_NOT_FOUND;
}
kvs_variant **kvs_schema_record_get(const kvs_schema *schema, kvs_record *record, const char *column) {
size_t index;
if (kvs_schema_column_lookup(schema, column, &index) == KVS_OK) {
return kvs_record_get(record, index);
}
return NULL;
}
kvs_schema_projection *kvs_schema_projection_create(const kvs_schema *schema, const char **columns, size_t num_column) {
size_t idx, index;
kvs_schema_projection *projection = malloc(sizeof(kvs_schema_projection) + (sizeof(size_t) * num_column));
projection->index = KVS_UNSAFE_CAST(projection, sizeof(kvs_schema_projection));
for (idx = 0; idx < num_column; ++idx) {
if (kvs_schema_column_lookup(schema, columns[idx], &index) == KVS_OK) {
projection->index[idx] = index;
} else {
free(projection);
projection = NULL;
break;
}
}
return projection;
}
void kvs_schema_projection_destroy(kvs_schema_projection *projection) {
free(projection);
}
kvs_variant **kvs_schema_projection_record_get(const kvs_schema_projection *projection, kvs_record *record, size_t index) {
return kvs_record_get(record, projection->index[index]);
}