--- a/src/SqlHandler.h Tue Dec 24 17:36:57 2019 +0100
+++ b/src/SqlHandler.h Wed Dec 25 00:57:26 2019 +0100
@@ -38,6 +38,7 @@
#include "Configuration.h"
#include "SqlException.h"
+#include "PreparedStatement.h"
namespace relpipe {
namespace tr {
@@ -48,90 +49,6 @@
using namespace relpipe::reader;
using namespace relpipe::reader::handlers;
-class PreparedStatement {
-private:
- sqlite3_stmt* stmt;
-
-public:
-
- PreparedStatement(sqlite3_stmt* stmt) : stmt(stmt) {
- }
-
- virtual ~PreparedStatement() {
- sqlite3_finalize(stmt);
- }
-
- void setBoolean(int parameterIndex, relpipe::reader::boolean_t value) {
- int result = sqlite3_bind_int(stmt, parameterIndex, value);
- if (result != SQLITE_OK) throw SqlException(L"Unable to set SQLite parameter.");
- }
-
- void setInteger(int parameterIndex, relpipe::reader::integer_t value) {
- int result = sqlite3_bind_int64(stmt, parameterIndex, value);
- if (result != SQLITE_OK) throw SqlException(L"Unable to set SQLite parameter.");
- }
-
- void setString(int parameterIndex, std::string value) {
- int result = sqlite3_bind_text(stmt, parameterIndex, value.c_str(), -1, SQLITE_TRANSIENT);
- if (result != SQLITE_OK) throw SqlException(L"Unable to set SQLite parameter.");
- }
-
- void setNull(int parameterIndex) {
- int result = sqlite3_bind_null(stmt, parameterIndex);
- if (result != SQLITE_OK) throw SqlException(L"Unable to set SQLite parameter.");
- }
-
- bool next() {
- int result = sqlite3_step(stmt);
- if (result == SQLITE_ROW) return true;
- else if (result == SQLITE_DONE) return false;
- else throw SqlException(L"Error while iterating over SQLite result.");
- }
-
- void reset() {
- int result = sqlite3_reset(stmt);
- if (result != SQLITE_OK) throw SqlException(L"Unable to reset SQLite prepared statement.");
- }
-
- int getColumnCount() {
- return sqlite3_column_count(stmt);
- }
-
- std::string getColumName(int columnIndex) {
- const char* name = sqlite3_column_name(stmt, columnIndex);
- if (name) return name;
- else throw SqlException(L"Unable to get SQLite column name.");
- }
-
- relpipe::writer::TypeId getColumType(int columnIndex, relpipe::writer::TypeId defaultType = relpipe::writer::TypeId::STRING) {
- const char* type = sqlite3_column_decltype(stmt, columnIndex);
-
- // TODO: sqlite3_column_decltype returns value only for columns of existing tables, not for dynamic expressions – SQLite uses dynamic types
- // maybe we could write a function/module that returns result set metadata for given query (before executing it)
- // or use at least explicit casts in SQL and modify sqlite3_column_decltype() function or add some new one to return such casted type
- //
- // fprintf(stderr, "%d → %s\n", columnIndex, type);
- // SELECT typeof(1+1); == "integer"
- // https://www.sqlite.org/c3ref/column_decltype.html – sqlite3_column_decltype
- // https://www.sqlite.org/c3ref/column_blob.html – sqlite3_column_type
- // https://www.sqlite.org/datatype3.html – Datatypes In SQLite Version 3
- // https://dba.stackexchange.com/questions/203220/sqlite-what-is-the-use-of-specifying-data-types
- // https://www.mail-archive.com/sqlite-users@mailinglists.sqlite.org/msg118093.html
-
- if (type == nullptr) return relpipe::writer::TypeId::STRING;
- else if (strcmp(type, "integer") == 0) return relpipe::writer::TypeId::INTEGER;
- else if (strcmp(type, "text") == 0) return relpipe::writer::TypeId::STRING;
- else return defaultType;
- // TODO: support also other data types
- }
-
- std::string getString(int columnIndex) {
- const char* value = (const char*) sqlite3_column_text(stmt, columnIndex);
- return value ? value : ""; // TODO: support NULL values (when supported in relpipe format)
- }
-
-};
-
class Connection {
private:
sqlite3* db;