Add SetupSQLStatements

Author: achow101

src/wallet/sqlite.cpp

@@ -61,6 +61,36 @@ SQLiteDatabase::SQLiteDatabase(const fs::path& dir_path, const fs::path& file_pa
     }
 }
 
+void SQLiteBatch::SetupSQLStatements()
+{
+    int res;
+    if (!m_read_stmt) {
+        if ((res = sqlite3_prepare_v2(m_database.m_db, "SELECT value FROM main WHERE key = ?", -1, &m_read_stmt, nullptr)) != SQLITE_OK) {
+            throw std::runtime_error(strprintf("SQLiteDatabase: Failed to setup SQL statements: %s\n", sqlite3_errstr(res)));
+        }
+    }
+    if (!m_insert_stmt) {
+        if ((res = sqlite3_prepare_v2(m_database.m_db, "INSERT INTO main VALUES(?, ?)", -1, &m_insert_stmt, nullptr)) != SQLITE_OK) {
+            throw std::runtime_error(strprintf("SQLiteDatabase: Failed to setup SQL statements: %s\n", sqlite3_errstr(res)));
+        }
+    }
+    if (!m_overwrite_stmt) {
+        if ((res = sqlite3_prepare_v2(m_database.m_db, "INSERT or REPLACE into main values(?, ?)", -1, &m_overwrite_stmt, nullptr)) != SQLITE_OK) {
+            throw std::runtime_error(strprintf("SQLiteDatabase: Failed to setup SQL statements: %s\n", sqlite3_errstr(res)));
+        }
+    }
+    if (!m_delete_stmt) {
+        if ((res = sqlite3_prepare_v2(m_database.m_db, "DELETE FROM main WHERE key = ?", -1, &m_delete_stmt, nullptr)) != SQLITE_OK) {
+            throw std::runtime_error(strprintf("SQLiteDatabase: Failed to setup SQL statements: %s\n", sqlite3_errstr(res)));
+        }
+    }
+    if (!m_cursor_stmt) {
+        if ((res = sqlite3_prepare_v2(m_database.m_db, "SELECT key, value FROM main", -1, &m_cursor_stmt, nullptr)) != SQLITE_OK) {
+            throw std::runtime_error(strprintf("SQLiteDatabase: Failed to setup SQL statements : %s\n", sqlite3_errstr(res)));
+        }
+    }
+}
+
 SQLiteDatabase::~SQLiteDatabase()
 {
     Cleanup();
@@ -178,6 +208,8 @@ SQLiteBatch::SQLiteBatch(SQLiteDatabase& database)
 {
     // Make sure we have a db handle
     assert(m_database.m_db);
+
+    SetupSQLStatements();
 }
 
 void SQLiteBatch::Close()
@@ -190,6 +222,33 @@ void SQLiteBatch::Close()
             LogPrintf("SQLiteBatch: Batch closed and failed to abort transaction\n");
         }
     }
+
+    // Free all of the prepared statements
+    int ret = sqlite3_finalize(m_read_stmt);
+    if (ret != SQLITE_OK) {
+        LogPrintf("SQLiteBatch: Batch closed but could not finalize read statement: %s\n", sqlite3_errstr(ret));
+    }
+    ret = sqlite3_finalize(m_insert_stmt);
+    if (ret != SQLITE_OK) {
+        LogPrintf("SQLiteBatch: Batch closed but could not finalize insert statement: %s\n", sqlite3_errstr(ret));
+    }
+    ret = sqlite3_finalize(m_overwrite_stmt);
+    if (ret != SQLITE_OK) {
+        LogPrintf("SQLiteBatch: Batch closed but could not finalize overwrite statement: %s\n", sqlite3_errstr(ret));
+    }
+    ret = sqlite3_finalize(m_delete_stmt);
+    if (ret != SQLITE_OK) {
+        LogPrintf("SQLiteBatch: Batch closed but could not finalize delete statement: %s\n", sqlite3_errstr(ret));
+    }
+    ret = sqlite3_finalize(m_cursor_stmt);
+    if (ret != SQLITE_OK) {
+        LogPrintf("SQLiteBatch: Batch closed but could not finalize cursor statement: %s\n", sqlite3_errstr(ret));
+    }
+    m_read_stmt = nullptr;
+    m_insert_stmt = nullptr;
+    m_overwrite_stmt = nullptr;
+    m_delete_stmt = nullptr;
+    m_cursor_stmt = nullptr;
 }
 
 bool SQLiteBatch::ReadKey(CDataStream&& key, CDataStream& value)

src/wallet/sqlite.h

@@ -18,6 +18,14 @@ class SQLiteBatch : public DatabaseBatch
 private:
     SQLiteDatabase& m_database;
 
+    sqlite3_stmt* m_read_stmt{nullptr};
+    sqlite3_stmt* m_insert_stmt{nullptr};
+    sqlite3_stmt* m_overwrite_stmt{nullptr};
+    sqlite3_stmt* m_delete_stmt{nullptr};
+    sqlite3_stmt* m_cursor_stmt{nullptr};
+
+    void SetupSQLStatements();
+
     bool ReadKey(CDataStream&& key, CDataStream& value) override;
     bool WriteKey(CDataStream&& key, CDataStream&& value, bool overwrite = true) override;
     bool EraseKey(CDataStream&& key) override;