harmony 鸿蒙relational_store.h
relational_store.h
Overview
Provides APIs to manage a relational database (RDB) store.
Since
10
Related Modules
Summary
Structs
| Name | Description |
|---|---|
| OH_Rdb_Config | Defines the RDB store configuration. |
| OH_Rdb_Store | Defines the RDB store type. |
Types
| Name | Description |
|---|---|
| OH_Rdb_SecurityLevel | Defines the RDB store security levels. |
Enums
| Name | Description |
|---|---|
| OH_Rdb_SecurityLevel { S1 = 1, S2, S3, S4 } | Enumerates the RDB store security levels. |
Functions
| Name | Description |
|---|---|
| OH_Rdb_CreateValueObject (void) | Creates an OH_VObject instance. |
| OH_Rdb_CreateValuesBucket (void) | Creates an OH_VBucket instance. |
| OH_Rdb_CreatePredicates (const char *table) | Creates an OH_Predicates instance. |
| OH_Rdb_GetOrOpen (const OH_Rdb_Config *config, int *errCode) | Obtains an OH_Rdb_Store instance for RDB store operations. |
| OH_Rdb_CloseStore (OH_Rdb_Store *store) | Destroys an OH_Rdb_Store object and reclaims the memory occupied by the object. |
| OH_Rdb_DeleteStore (const OH_Rdb_Config *config) | Deletes an RDB store with the specified database file configuration. |
| OH_Rdb_Insert (OH_Rdb_Store *store, const char *table, OH_VBucket *valuesBucket) | Inserts a row of data into a table. |
| OH_Rdb_Update (OH_Rdb_Store *store, OH_VBucket *valuesBucket, OH_Predicates *predicates) | Updates data in an RDB store based on specified conditions. |
| OH_Rdb_Delete (OH_Rdb_Store *store, OH_Predicates *predicates) | Deletes data from an RDB store based on specified conditions. |
| OH_Rdb_Query (OH_Rdb_Store *store, OH_Predicates *predicates, const char *const *columnNames, int length) | Queries data in an RDB store based on specified conditions. |
| OH_Rdb_Execute (OH_Rdb_Store *store, const char *sql) | Executes the SQL statement that returns no value. |
| OH_Rdb_ExecuteQuery (OH_Rdb_Store *store, const char *sql) | Queries data in an RDB store based on the SQL statements executed. |
| OH_Rdb_BeginTransaction (OH_Rdb_Store *store) | Starts the transaction before executing the SQL statements. |
| OH_Rdb_RollBack (OH_Rdb_Store *store) | Rolls back the SQL statements executed. |
| OH_Rdb_Commit (OH_Rdb_Store *store) | Commits the executed SQL statements. |
| OH_Rdb_Backup (OH_Rdb_Store *store, const char *databasePath) | Backs up the RDB store in the specified path. |
| OH_Rdb_Restore (OH_Rdb_Store *store, const char *databasePath) | Restores an RDB store from the specified database backup file. |
| OH_Rdb_GetVersion (OH_Rdb_Store *store, int *version) | Obtains the RDB store version. |
| OH_Rdb_SetVersion (OH_Rdb_Store *store, int version) | Sets the RDB store version. |
你可能感兴趣的鸿蒙文章
0
赞
- 所属分类： 后端技术
- 本文标签：
热门推荐
-
2、 - 优质文章
-
3、 gate.io
-
8、 golang
-
9、 openharmony
-
10、 Vue中input框自动聚焦