xxq250
/
homework-jianmu
1
0
Fork 0
Code Issues Pull Requests 1 Actions Packages Projects Releases Wiki Activity

more

This commit is contained in:
Hongze Cheng 2021-12-30 05:43:44 +00:00
parent 24c6abcb0b
commit 212376551d
1 changed files with 51 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

50
source/dnode/vnode/meta/src/metaBDBImpl.c
View File

@ -38,6 +38,11 @@ struct SMetaDB {
DB_ENV *pEvn;
};
typedef struct {
int32_t nCols;
SSchema *pSchema;
} SSchemaWrapper;
typedef int (*bdbIdxCbPtr)(DB *, const DBT *, const DBT *, DBT *);
static SMetaDB *metaNewDB();
@ -55,6 +60,7 @@ static int metaCtbIdxCb(DB *pIdx, const DBT *pKey, const DBT *pValue, DBT *
static int metaEncodeTbInfo(void **buf, STbCfg *pTbCfg);
static void * metaDecodeTbInfo(void *buf, STbCfg *pTbCfg);
static void metaClearTbCfg(STbCfg *pTbCfg);
static SSchemaWrapper *metaGetTableSchema(SMeta *pMeta, tb_uid_t uid, int32_t sver);
#define BDB_PERR(info, code) fprintf(stderr, info " reason: %s", db_strerror(code))
@ -432,6 +438,7 @@ static void metaClearTbCfg(STbCfg *pTbCfg) {
/* ------------------------ FOR QUERY ------------------------ */
int metaGetTableInfo(SMeta *pMeta, char *tbname, STableMetaMsg **ppMsg) {
#if 0
DBT key = {0};
DBT value = {0};
SMetaDB * pMetaDB = pMeta->pDB;
@ -505,5 +512,48 @@ int metaGetTableInfo(SMeta *pMeta, char *tbname, STableMetaMsg **ppMsg) {
*ppMsg = pMsg;
#endif
return 0;
}
static SSchemaWrapper *metaGetTableSchema(SMeta *pMeta, tb_uid_t uid, int32_t sver) {
uint32_t nCols;
SSchemaWrapper *pSW = NULL;
SMetaDB * pDB = pMeta->pDB;
int ret;
void * pBuf;
SSchema * pSchema;
SSchemaKey schemaKey = {uid, sver};
DBT key = {0};
DBT value = {0};
// Set key/value properties
key.data = &schemaKey;
key.size = sizeof(schemaKey);
// Query
ret = pDB->pSchemaDB->get(pDB->pSchemaDB, NULL, &key, &value, 0);
if (ret != 0) {
return NULL;
}
// Decode the schema
pBuf = value.data;
taosDecodeFixedI32(&pBuf, &nCols);
pSW = (SSchemaWrapper *)malloc(sizeof(*pSW) + sizeof(SSchema) * nCols);
if (pSW == NULL) {
return NULL;
}
pSW->pSchema = POINTER_SHIFT(pSW, sizeof(*pSW));
for (int i = 0; i < nCols; i++) {
pSchema = pSW->pSchema + i;
taosDecodeFixedI8(&pBuf, &(pSchema->type));
taosDecodeFixedI32(&pBuf, &(pSchema->colId));
taosDecodeFixedI32(&pBuf, &(pSchema->bytes));
taosDecodeStringTo(&pBuf, pSchema->name);
}
return pSW;
}