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Actually do the query and get results back

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Erica Fischer
2024-12-05 16:01:27 -08:00
parent ad47b93a81
commit cbcdbc5516
1 changed files with 32 additions and 0 deletions
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tile-join.cpp
+32
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@@ -77,6 +77,7 @@ struct stats {
// https://stackoverflow.com/questions/11753871/getting-the-type-of-a-column-in-sqlite // https://stackoverflow.com/questions/11753871/getting-the-type-of-a-column-in-sqlite
std::string get_column_types_query = "SELECT m.name AS table_name, UPPER(m.type) AS table_type, p.name AS column_name, p.type AS data_type, CASE p.pk WHEN 1 THEN 'PRIMARY KEY' END AS const FROM sqlite_master AS m INNER JOIN pragma_table_info(m.name) AS p WHERE m.name NOT IN ('sqlite_sequence') ORDER BY m.name, p.cid;"; std::string get_column_types_query = "SELECT m.name AS table_name, UPPER(m.type) AS table_type, p.name AS column_name, p.type AS data_type, CASE p.pk WHEN 1 THEN 'PRIMARY KEY' END AS const FROM sqlite_master AS m INNER JOIN pragma_table_info(m.name) AS p WHERE m.name NOT IN ('sqlite_sequence') ORDER BY m.name, p.cid;";
// select name, type from pragma_table_info('parsed');
std::vector<std::map<std::string, mvt_value>> get_joined_rows(sqlite3 *db, const std::vector<mvt_value> &join_keys) { std::vector<std::map<std::string, mvt_value>> get_joined_rows(sqlite3 *db, const std::vector<mvt_value> &join_keys) {
std::vector<std::map<std::string, mvt_value>> ret; std::vector<std::map<std::string, mvt_value>> ret;
@@ -107,6 +108,37 @@ std::vector<std::map<std::string, mvt_value>> get_joined_rows(sqlite3 *db, const
query += ");"; query += ");";
printf("%s\n", query.c_str()); printf("%s\n", query.c_str());
sqlite3_stmt *stmt;
if (sqlite3_prepare_v2(db, query.c_str(), -1, &stmt, NULL) != SQLITE_OK) {
fprintf(stderr, "sqlite3 query %s failed: %s\n", query.c_str(), sqlite3_errmsg(db));
exit(EXIT_SQLITE);
}
while (sqlite3_step(stmt) == SQLITE_ROW) {
int count = sqlite3_column_count(stmt);
std::map<std::string, mvt_value> row;
for (int i = 0; i < count; i++) {
int type = sqlite3_column_type(stmt, i);
mvt_value v;
v.type = mvt_null;
if (type == SQLITE_INTEGER || type == SQLITE_FLOAT) {
v = mvt_value(sqlite3_column_double(stmt, i));
} else if (type == SQLITE_TEXT || type == SQLITE_BLOB) {
v.set_string_value((const char *) sqlite3_column_text(stmt, i));
}
const char *name = sqlite3_column_name(stmt, i);
row.emplace(name, v);
printf("%s -> %s\n", name, v.toString().c_str());
}
}
if (sqlite3_finalize(stmt) != SQLITE_OK) {
fprintf(stderr, "sqlite3 finalize failed: %s\n", sqlite3_errmsg(db));
exit(EXIT_SQLITE);
}
return ret; return ret;
} }