Add module ABI & API for clearing tables (#4729)

# Description of Changes

Support is added to Rust, C#, C++, and TS modules.

# API and ABI breaking changes

None

# Expected complexity level and risk

1

# Testing

I wasn't able to regen module bindings for sdk tests, hitting an error
while doing so.

---------

Co-authored-by: Jason Larabie <jason@clockworklabs.io>

Author: Centril

crates/bindings-cpp/include/spacetimedb/abi/FFI.h

@@ -9,21 +9,21 @@
 /**
  * @file FFI.h
  * @brief SpacetimeDB Foreign Function Interface (FFI) layer for C++ modules
- * 
+ *
  * This file re-exports the raw ABI functions with additional type aliases
  * and convenience functions. Since we now use C# style opaque types that
  * are ABI-compatible, no conversion is needed.
- * 
+ *
  * Organization:
  * - Raw C ABI with opaque types is in abi.h
  * - This file provides type aliases and convenience functions
- * 
+ *
  * Key Features:
  * - Type-safe opaque types prevent mixing TableId with IndexId etc.
  * - Full BSATN integration for all data operations
  * - Modern iterator API with proper resource management
  * - Comprehensive error handling with Status codes
- * 
+ *
  * Note: WASI shims for C++ standard library support are provided separately
  * in the module library implementation.
  */
@@ -55,6 +55,7 @@ using ::datastore_delete_by_index_scan_range_bsatn;
 using ::datastore_delete_by_index_scan_point_bsatn;
 using ::datastore_delete_by_btree_scan_bsatn;
 using ::datastore_delete_all_by_eq_bsatn;
+using ::datastore_clear;
 using ::bytes_source_read;
 using ::bytes_source_remaining_length;
 using ::bytes_sink_write;
@@ -92,11 +93,11 @@ inline int16_t call_reducer(
     uint32_t id,
     uint64_t sender_0, uint64_t sender_1, uint64_t sender_2, uint64_t sender_3,
     uint64_t conn_id_0, uint64_t conn_id_1,
-    uint64_t timestamp, 
-    BytesSource args, 
+    uint64_t timestamp,
+    BytesSource args,
     BytesSink error) {
     return ::__call_reducer__(id, sender_0, sender_1, sender_2, sender_3,
-                             conn_id_0, conn_id_1, timestamp, 
+                             conn_id_0, conn_id_1, timestamp,
                              args, error);
 }
 
@@ -135,4 +136,4 @@ inline void console_log(const uint8_t* message, size_t message_len, LogLevel lev
 } // namespace FFI
 } // namespace SpacetimeDB
 
-#endif // SPACETIMEDB_FFI_H
+#endif // SPACETIMEDB_FFI_H

crates/bindings-cpp/include/spacetimedb/abi/abi.h

@@ -8,7 +8,7 @@
 /**
  * @file abi.h
  * @brief Raw C ABI interface for SpacetimeDB modules
- * 
+ *
  * This file contains the raw C-compatible ABI declarations.
  * These functions use only C-compatible types and are suitable
  * for extern "C" linkage.
@@ -35,6 +35,10 @@
 #define STDB_IMPORT_10_4(name) \
     __attribute__((import_module("spacetime_10.4"), import_name(#name))) extern
 
+// Clear syscall is in spacetime_10.4
+#define STDB_IMPORT_10_5(name) \
+    __attribute__((import_module("spacetime_10.5"), import_name(#name))) extern
+
 // Import opaque types into global namespace for C compatibility
 using SpacetimeDB::Status;
 using SpacetimeDB::TableId;
@@ -73,7 +77,7 @@ Status datastore_table_scan_bsatn(TableId table_id, RowIter* out);
 STDB_IMPORT(datastore_index_scan_range_bsatn)
 Status datastore_index_scan_range_bsatn(
     IndexId index_id, const uint8_t* prefix_ptr, size_t prefix_len, ColId prefix_elems,
-    const uint8_t* rstart_ptr, size_t rstart_len, const uint8_t* rend_ptr, size_t rend_len, 
+    const uint8_t* rstart_ptr, size_t rstart_len, const uint8_t* rend_ptr, size_t rend_len,
     RowIter* out);
 
 STDB_IMPORT_10_4(datastore_index_scan_point_bsatn)
@@ -85,7 +89,7 @@ Status datastore_index_scan_point_bsatn(
 STDB_IMPORT(datastore_btree_scan_bsatn)
 Status datastore_btree_scan_bsatn(
     IndexId index_id, const uint8_t* prefix_ptr, size_t prefix_len, ColId prefix_elems,
-    const uint8_t* rstart_ptr, size_t rstart_len, const uint8_t* rend_ptr, size_t rend_len, 
+    const uint8_t* rstart_ptr, size_t rstart_len, const uint8_t* rend_ptr, size_t rend_len,
     RowIter* out);
 
 // ===== Row Iterator Operations =====
@@ -106,7 +110,7 @@ Status datastore_update_bsatn(TableId table_id, IndexId index_id, uint8_t* row_p
 STDB_IMPORT(datastore_delete_by_index_scan_range_bsatn)
 Status datastore_delete_by_index_scan_range_bsatn(
     IndexId index_id, const uint8_t* prefix_ptr, size_t prefix_len, ColId prefix_elems,
-    const uint8_t* rstart_ptr, size_t rstart_len, const uint8_t* rend_ptr, size_t rend_len, 
+    const uint8_t* rstart_ptr, size_t rstart_len, const uint8_t* rend_ptr, size_t rend_len,
     uint32_t* out);
 
 STDB_IMPORT_10_4(datastore_delete_by_index_scan_point_bsatn)
@@ -117,14 +121,17 @@ Status datastore_delete_by_index_scan_point_bsatn(
 STDB_IMPORT(datastore_delete_by_btree_scan_bsatn)
 Status datastore_delete_by_btree_scan_bsatn(
     IndexId index_id, const uint8_t* prefix_ptr, size_t prefix_len, ColId prefix_elems,
-    const uint8_t* rstart_ptr, size_t rstart_len, const uint8_t* rend_ptr, size_t rend_len, 
+    const uint8_t* rstart_ptr, size_t rstart_len, const uint8_t* rend_ptr, size_t rend_len,
     uint32_t* out);
 
 STDB_IMPORT(datastore_delete_all_by_eq_bsatn)
 Status datastore_delete_all_by_eq_bsatn(
     TableId table_id, const uint8_t* rel_ptr, size_t rel_len,
     uint32_t* out);
 
+STDB_IMPORT_10_5(datastore_clear)
+Status datastore_clear(TableId table_id, uint64_t* out);
+
 // ===== Bytes Source/Sink Operations =====
 STDB_IMPORT(bytes_source_read)
 int16_t bytes_source_read(BytesSource source, uint8_t* buffer_ptr, size_t* buffer_len_ptr);
@@ -205,8 +212,8 @@ int16_t __call_reducer__(
     uint32_t id,
     uint64_t sender_0, uint64_t sender_1, uint64_t sender_2, uint64_t sender_3,
     uint64_t conn_id_0, uint64_t conn_id_1,
-    uint64_t timestamp, 
-    BytesSource args, 
+    uint64_t timestamp,
+    BytesSource args,
     BytesSink error);
 
 // ========================================================================
@@ -223,4 +230,4 @@ int16_t __call_reducer__(
 
 #pragma clang diagnostic pop
 
-#endif // SPACETIMEDB_ABI_H
+#endif // SPACETIMEDB_ABI_H

crates/bindings-cpp/include/spacetimedb/database.h

@@ -146,7 +146,12 @@ class TableAccessor {
     uint64_t count() const {
         return get_table().count();
     }
-    
+
+    // Clear all rows in the table and return the number removed
+    uint64_t clear() const {
+        return get_table().clear();
+    }
+
     // Delete rows matching a value
     uint32_t delete_by_value(const T& value) const {
         return get_table().delete_by_value(value);