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make query_start method to return bool - if result will have some rows or not

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Nikita Sivukhin
2025-10-27 23:07:37 +04:00
parent e42ce24534
commit 8acbe3de66
6 changed files with 23 additions and 20 deletions
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4
core/index_method/mod.rs
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@@ -87,7 +87,9 @@ pub trait IndexMethodCursor {
/// For example, for 2 patterns ["SELECT * FROM {table} LIMIT ?", "SELECT * FROM {table} WHERE x = ?"], query_start(...) call can have following arguments:
/// - [Integer(0), Integer(10)] - pattern "SELECT * FROM {table} LIMIT ?" was chosen with LIMIT parameter equals to 10
/// - [Integer(1), Text("turso")] - pattern "SELECT * FROM {table} WHERE x = ?" was chosen with equality comparison equals to "turso"
fn query_start(&mut self, values: &[Register]) -> Result<IOResult<()>>;
///
/// Returns false if query will produce no rows (similar to VFilter/Rewind op codes)
fn query_start(&mut self, values: &[Register]) -> Result<IOResult<bool>>;
/// Moves cursor to the next response row
/// Returns false if query exhausted all rows