Add the sqlite3_vtab_collation() function, which allows an xBestIndex callback

to determine the collation sequence that SQLite will use for a comparison. And
the SQLITE_DBCONFIG_FULL_EQP configuration option, which enhances the output
of "EXPLAIN QUERY PLAN" so that it includes statements run by triggers. And
the code for the sqlite3_expert extension and command line application.

FossilOrigin-Name: 4c782c950204c09c1d8f857c39c4cf476539ec4e7eee6fd86419d47cf0f8b9e0

1 files changed, 15 insertions, 0 deletions

diff --git a/src/main.c b/src/main.c
index c25d3a448..52d3be953 100644
--- a/src/main.c
+++ b/src/main.c
@@ -806,6 +806,21 @@ int sqlite3_db_config(sqlite3 *db, int op, ...){
       rc = setupLookaside(db, pBuf, sz, cnt);
       break;
     }
+    case SQLITE_DBCONFIG_FULL_EQP: {
+      int onoff = va_arg(ap, int);
+      int *pRes = va_arg(ap, int*);
+      if( onoff>0 ){
+        db->bFullEQP = 1;
+      }else if( onoff==0 ){
+        db->bFullEQP = 0;
+      }
+      sqlite3ExpirePreparedStatements(db);
+      if( pRes ){
+        *pRes = db->bFullEQP;
+      }
+      rc = SQLITE_OK;
+      break;
+    }
     default: {
       static const struct {
         int op;      /* The opcode */