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db: Implement basic query capabilities

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This is the first step towards being able to extract information from query
rows. Only the most basic types are exposed, the others will be built on top
of these primitives.

Signed-off-by: Christian Decker <decker.christian@gmail.com>
This commit is contained in:
Christian Decker
2019-08-03 16:34:03 +02:00
committed by Rusty Russell
parent 98963c58e4
commit d0027b1036
4 changed files with 108 additions and 0 deletions
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43
wallet/db_sqlite3.c
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@@ -124,6 +124,42 @@ static bool db_sqlite3_commit_tx(struct db *db)
return true;
}
static bool db_sqlite3_column_is_null(struct db_stmt *stmt, int col)
{
sqlite3_stmt *s = (sqlite3_stmt*)stmt->inner_stmt;
return sqlite3_column_type(s, col) == SQLITE_NULL;
}
static u64 db_sqlite3_column_u64(struct db_stmt *stmt, int col)
{
sqlite3_stmt *s = (sqlite3_stmt*)stmt->inner_stmt;
return sqlite3_column_int64(s, col);
}
static s64 db_sqlite3_column_int(struct db_stmt *stmt, int col)
{
sqlite3_stmt *s = (sqlite3_stmt*)stmt->inner_stmt;
return sqlite3_column_int(s, col);
}
static size_t db_sqlite3_column_bytes(struct db_stmt *stmt, int col)
{
sqlite3_stmt *s = (sqlite3_stmt*)stmt->inner_stmt;
return sqlite3_column_bytes(s, col);
}
static const void *db_sqlite3_column_blob(struct db_stmt *stmt, int col)
{
sqlite3_stmt *s = (sqlite3_stmt*)stmt->inner_stmt;
return sqlite3_column_blob(s, col);
}
static const unsigned char *db_sqlite3_column_text(struct db_stmt *stmt, int col)
{
sqlite3_stmt *s = (sqlite3_stmt*)stmt->inner_stmt;
return sqlite3_column_text(s, col);
}
static void db_sqlite3_stmt_free(struct db_stmt *stmt)
{
if (stmt->inner_stmt)
@@ -142,6 +178,13 @@ struct db_config db_sqlite3_config = {
.begin_tx_fn = &db_sqlite3_begin_tx,
.commit_tx_fn = &db_sqlite3_commit_tx,
.stmt_free_fn = &db_sqlite3_stmt_free,
.column_is_null_fn = &db_sqlite3_column_is_null,
.column_u64_fn = &db_sqlite3_column_u64,
.column_int_fn = &db_sqlite3_column_int,
.column_bytes_fn = &db_sqlite3_column_bytes,
.column_blob_fn = &db_sqlite3_column_blob,
.column_text_fn = &db_sqlite3_column_text,
};
AUTODATA(db_backends, &db_sqlite3_config);