Revert "slight optimization where we do not check pragma_schema_version if already checked"

This reverts commit 9a7204f.

Author: tantaman

core/rs/core/src/c.rs

@@ -56,7 +56,6 @@ pub struct crsql_ExtData {
     pub pendingDbVersion: sqlite::int64,
     pub pragmaSchemaVersion: ::core::ffi::c_int,
     pub updatedTableInfosThisTx: ::core::ffi::c_int,
-    pub readDbVersionThisTx: ::core::ffi::c_int,
     pub pragmaSchemaVersionForTableInfos: ::core::ffi::c_int,
     pub siteId: *mut ::core::ffi::c_uchar,
     pub pDbVersionStmt: *mut sqlite::stmt,
@@ -341,21 +340,11 @@ fn bindgen_test_layout_crsql_ExtData() {
             stringify!(updatedTableInfosThisTx)
         )
     );
-    assert_eq!(
-        unsafe { ::core::ptr::addr_of!((*ptr).readDbVersionThisTx) as usize - ptr as usize },
-        48usize,
-        concat!(
-            "Offset of field: ",
-            stringify!(crsql_ExtData),
-            "::",
-            stringify!(readDbVersionThisTx)
-        )
-    );
     assert_eq!(
         unsafe {
             ::core::ptr::addr_of!((*ptr).pragmaSchemaVersionForTableInfos) as usize - ptr as usize
         },
-        52usize,
+        48usize,
         concat!(
             "Offset of field: ",
             stringify!(crsql_ExtData),

core/rs/core/src/db_version.rs

@@ -79,10 +79,6 @@ pub fn fill_db_version_if_needed(
     ext_data: *mut crsql_ExtData,
 ) -> Result<ResultCode, String> {
     unsafe {
-        if (*ext_data).readDbVersionThisTx == 1 {
-            return Ok(ResultCode::OK);
-        }
-        (*ext_data).readDbVersionThisTx = 1;
         let rc = crsql_fetchPragmaDataVersion(db, ext_data);
         if rc == -1 {
             return Err("failed to fetch PRAGMA data_version".to_string());

core/src/crsqlite.c

@@ -36,7 +36,6 @@ static int commitHook(void *pUserData) {
   pExtData->pendingDbVersion = -1;
   pExtData->seq = 0;
   pExtData->updatedTableInfosThisTx = 0;
-  pExtData->readDbVersionThisTx = 0;
   return SQLITE_OK;
 }
 
@@ -46,7 +45,6 @@ static void rollbackHook(void *pUserData) {
   pExtData->pendingDbVersion = -1;
   pExtData->seq = 0;
   pExtData->updatedTableInfosThisTx = 0;
-  pExtData->readDbVersionThisTx = 0;
 }
 
 #ifdef LIBSQL

core/src/ext-data.c

@@ -50,7 +50,6 @@ crsql_ExtData *crsql_newExtData(sqlite3 *db, unsigned char *siteIdBuffer) {
   pExtData->tableInfos = 0;
   pExtData->rowsImpacted = 0;
   pExtData->updatedTableInfosThisTx = 0;
-  pExtData->readDbVersionThisTx = 0;
   crsql_init_table_info_vec(pExtData);
 
   int pv = crsql_fetchPragmaDataVersion(db, pExtData);

core/src/ext-data.h

@@ -22,7 +22,6 @@ struct crsql_ExtData {
   sqlite3_int64 pendingDbVersion;
   int pragmaSchemaVersion;
   int updatedTableInfosThisTx;
-  int readDbVersionThisTx;
 
   // we need another schema version number that tracks when we checked it
   // for zpTableInfos.