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add dbx generic command

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This commit is contained in:
Kenneth Cheng 2020-05-01 16:07:11 +08:00
parent 3056d81fcc
commit f28c53786d
2 changed files with 53 additions and 21 deletions
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36
README.md
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@ -9,7 +9,7 @@ $ redis-cli
127.0.0.1:6379> hmset phonebook:0002 name "Betty Joan" tel "1-444-9999-1112" birth "2019-12-01" pos 1 gender "F"
127.0.0.1:6379> hmset phonebook:0003 name "Bloody Mary" tel "1-666-1234-9812" birth "2018-01-31" pos 2 gender "F"
127.0.0.1:6379> hmset phonebook:0004 name "Mattias Swensson" tel "1-888-3333-1412" birth "2017-06-30" pos 4 gender "M"
127.0.0.1:6379> dbx.select name,tel from phonebook where gender = "F" order by pos desc
127.0.0.1:6379> dbx select name,tel from phonebook where gender = "F" order by pos desc
1) 1) name
2) "Bloody Mary"
3) tel
@ -54,7 +54,7 @@ If you still have problem in loading the module, please visit: https://redis.io/
#### Select Statement
You may specify multiple fields separated by comma
```bash
127.0.0.1:6379> dbx.select name, gender, birth from phonebook
127.0.0.1:6379> dbx select name, gender, birth from phonebook
1) 1) name
2) "Betty Joan"
3) gender
@ -83,7 +83,7 @@ You may specify multiple fields separated by comma
"*" is support
```bash
127.0.0.1:6379> dbx.select * from phonebook where birth > '2019-11-11'
127.0.0.1:6379> dbx select * from phonebook where birth > '2019-11-11'
1) 1) "name"
2) "Betty Joan"
3) "tel"
@ -98,7 +98,7 @@ You may specify multiple fields separated by comma
If you want to show the exact keys, you may try rowid()
```bash
127.0.0.1:6379> dbx.select rowid() from phonebook
127.0.0.1:6379> dbx select rowid() from phonebook
1) 1) rowid()
2) "phonebook:1588299191-764848276"
2) 1) rowid()
@ -123,12 +123,12 @@ Each record is exactly a hash, you could use raw REDIS commands ``hget, hmget or
#### Where Clause in Select Statement
Your could specify =, >, <, >=, <=, <>, != or like conditions in where clause. Now the module only support "and" to join multiple conditions.
```bash
127.0.0.1:6379> dbx.select tel from phonebook where name like Son
127.0.0.1:6379> dbx select tel from phonebook where name like Son
1) 1) tel
2) "1-888-3333-1412"
2) 1) tel
2) "1-456-1246-3421"
127.0.0.1:6379> dbx.select tel from phonebook where name like Son and pos = 4
127.0.0.1:6379> dbx select tel from phonebook where name like Son and pos = 4
1) 1) tel
2) "1-888-3333-1412"
```
@ -136,42 +136,42 @@ Your could specify =, >, <, >=, <=, <>, != or like conditions in where clause. N
#### Order Clause in Select Statement
Ordering can be ascending or descending. All sortings are alpha-sort.
```bash
127.0.0.1:6379> dbx.select * from phonebook order by pos asc
127.0.0.1:6379> dbx select * from phonebook order by pos asc
...
127.0.0.1:6379> dbx.select * from phonebook order by pos desc
127.0.0.1:6379> dbx select * from phonebook order by pos desc
...
```
#### Delete Statement
You may also use Insert and Delete statement to operate the hash. If you does not provide the where clause, it will delete all the records of the specified key prefix. (i.e. phonebook)
```bash
127.0.0.1:6379> dbx.delete from phonebook where gender = F
127.0.0.1:6379> dbx delete from phonebook where gender = F
(integer) 2
127.0.0.1:6379> dbx.delete from phonebook
127.0.0.1:6379> dbx delete from phonebook
(integer) 2
```
#### Insert Statement
The module provide simple Insert statement which same as the function of the REDIS command hmset. It will append a random string to your provided key (i.e. phonebook). If operation is successful, it will return the key name.
```bash
127.0.0.1:6379> dbx.insert into phonebook (name,tel,birth,pos,gender) values ('Peter Nelson' ,1-456-1246-3421, 2019-10-01, 3, M)
127.0.0.1:6379> dbx insert into phonebook (name,tel,birth,pos,gender) values ('Peter Nelson' ,1-456-1246-3421, 2019-10-01, 3, M)
"phonebook:1588298418-551514504"
127.0.0.1:6379> dbx.insert into phonebook (name,tel,birth,pos,gender) values ('Betty Joan' ,1-444-9999-1112, 2019-12-01, 1, F)
127.0.0.1:6379> dbx insert into phonebook (name,tel,birth,pos,gender) values ('Betty Joan' ,1-444-9999-1112, 2019-12-01, 1, F)
"phonebook:1588299191-764848276"
127.0.0.1:6379> dbx.insert into phonebook (name,tel,birth,pos,gender) values ('Bloody Mary' ,1-666-1234-9812, 2018-01-31, 2, F)
127.0.0.1:6379> dbx insert into phonebook (name,tel,birth,pos,gender) values ('Bloody Mary' ,1-666-1234-9812, 2018-01-31, 2, F)
"phonebook:1588299196-2115347437"
127.0.0.1:6379> dbx.insert into phonebook (name,tel,birth,pos,gender) values ('Mattias Swensson' ,1-888-3333-1412, 2017-06-30, 4, M)
127.0.0.1:6379> dbx insert into phonebook (name,tel,birth,pos,gender) values ('Mattias Swensson' ,1-888-3333-1412, 2017-06-30, 4, M)
"phonebook:1588299202-1052597574"
```
Note that Redis requires at least one space after the single and double quoted arguments.
Or you may quote the whole SQL statement as below:
```bash
127.0.0.1:6379> dbx.insert "into phonebook (name,tel,birth,pos,gender) values ('Peter Nelson','1-456-1246-3421','2019-10-01',3, 'M')"
127.0.0.1:6379> dbx "insert into phonebook (name,tel,birth,pos,gender) values ('Peter Nelson','1-456-1246-3421','2019-10-01',3, 'M')"
```
#### Issue command from BASH shell
```bash
$ redis-cli dbx.select "*" from phonebook where gender = M order by pos desc
$ redis-cli dbx select "*" from phonebook where gender = M order by pos desc
1) 1) "name"
2) "Mattias Swensson"
3) "tel"
@ -192,13 +192,13 @@ $ redis-cli dbx.select "*" from phonebook where gender = M order by pos desc
8) "3"
9) "gender"
10) "M"
$ redis-cli dbx.select name from phonebook where tel like 9812
$ redis-cli dbx select name from phonebook where tel like 9812
1) 1) name
2) "Bloody Mary"
```
Note that "*" requires double quoted otherwise it will pass all the filename in current directory. Of course you could quote the whole SQL statement.
```bash
$ redis-cli dbx.select "* from phonebook where gender = M order by pos desc"
$ redis-cli dbx "select * from phonebook where gender = M order by pos desc"
```
## Compatibility

38
src/dbx.c
View File

@ -261,13 +261,16 @@ int SelectCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
strcat(s, temp);
}
char *sp = s;
if (strncmp("select", sp, 6) == 0) sp += 6;
int step = 0;
char temp[1024] = "";
char stmSelect[1024] = "";
char stmWhere[1024] = "";
char stmOrder[1024] = "";
char *token = strtok(s, " ");
char *token = strtok(sp, " ");
while (token != NULL) {
// If it is beginning in single quote, find the end quote in the following tokens
if (token[0] == 39) {
@ -455,13 +458,16 @@ int InsertCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
strcat(s, temp);
}
char *sp = s;
if (strncmp("insert", sp, 6) == 0) sp += 6;
int step = 0;
char temp[1024] = "";
char stmField[1024] = "";
char stmValue[1024] = "";
char *p;
char *token = strtok(s, " ");
char *token = strtok(sp, " ");
while (token != NULL) {
if (token[0] == 39) {
strcpy(temp, &token[1]);
@ -600,11 +606,14 @@ int DeleteCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
strcat(s, temp);
}
char *sp = s;
if (strncmp("delete", sp, 6) == 0) sp += 6;
int step = 0;
char temp[1024] = "";
char stmWhere[1024] = "";
char *token = strtok(s, " ");
char *token = strtok(sp, " ");
while (token != NULL) {
// If it is beginning in single quote, find the end quote in the following tokens
if (token[0] == 39) {
@ -707,6 +716,25 @@ int DeleteCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
return REDISMODULE_OK;
}
int ExecCommand(RedisModuleCtx *ctx, RedisModuleString **argv, int argc) {
if (argc < 2)
return RedisModule_WrongArity(ctx);
size_t plen;
const char *arg = RedisModule_StringPtrLen(argv[1], &plen);
if (strncmp(arg, "select", 6) == 0)
return SelectCommand(ctx, argv, argc);
else if (strncmp(arg, "insert", 6) == 0)
return InsertCommand(ctx, argv, argc);
else if (strncmp(arg, "delete", 6) == 0)
return DeleteCommand(ctx, argv, argc);
else {
RedisModule_ReplyWithError(ctx, "parse error");
return REDISMODULE_ERR;
}
}
int RedisModule_OnLoad(RedisModuleCtx *ctx) {
// Register the module
@ -723,5 +751,9 @@ int RedisModule_OnLoad(RedisModuleCtx *ctx) {
if (RedisModule_CreateCommand(ctx, "dbx.delete", DeleteCommand, "write deny-oom", 1, 1, 1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
// Register the command
if (RedisModule_CreateCommand(ctx, "dbx", ExecCommand, "write deny-oom", 1, 1, 1) == REDISMODULE_ERR)
return REDISMODULE_ERR;
return REDISMODULE_OK;
}