New test-only SQL functions: implies_nonnull_row(), expr_compare(), and
expr_implies_expr(). The SQLITE_TESTCTRL_INTERNAL_FUNCTIONS test-control
is modified to toggle internal function access on and off for a single
database connection.
FossilOrigin-Name: 473892a8eceacf24d57fd0c72ff2a0b8be4e0d75e0af7a30bdb24fbc3b453601
diff --git a/src/expr.c b/src/expr.c
index 629768f..da7e4bc 100644
--- a/src/expr.c
+++ b/src/expr.c
@@ -3608,15 +3608,52 @@
break;
}
- case INLINEFUNC_unlikely: {
+ default: {
/* The UNLIKELY() function is a no-op. The result is the value
** of the first argument.
*/
- assert( nFarg>=1 );
+ assert( nFarg==1 || nFarg==2 );
target = sqlite3ExprCodeTarget(pParse, pFarg->a[0].pExpr, target);
break;
}
+ /***********************************************************************
+ ** Test-only SQL functions that are only usable if enabled
+ ** via SQLITE_TESTCTRL_INTERNAL_FUNCTIONS
+ */
+ case INLINEFUNC_expr_compare: {
+ /* Compare two expressions using sqlite3ExprCompare() */
+ assert( nFarg==2 );
+ sqlite3VdbeAddOp2(v, OP_Integer,
+ sqlite3ExprCompare(0,pFarg->a[0].pExpr, pFarg->a[1].pExpr,-1),
+ target);
+ break;
+ }
+
+ case INLINEFUNC_expr_implies_expr: {
+ /* Compare two expressions using sqlite3ExprImpliesExpr() */
+ assert( nFarg==2 );
+ sqlite3VdbeAddOp2(v, OP_Integer,
+ sqlite3ExprImpliesExpr(pParse,pFarg->a[0].pExpr, pFarg->a[1].pExpr,-1),
+ target);
+ break;
+ }
+
+ case INLINEFUNC_implies_nonnull_row: {
+ /* REsult of sqlite3ExprImpliesNonNullRow() */
+ Expr *pA1;
+ assert( nFarg==2 );
+ pA1 = pFarg->a[1].pExpr;
+ if( pA1->op==TK_COLUMN ){
+ sqlite3VdbeAddOp2(v, OP_Integer,
+ sqlite3ExprImpliesNonNullRow(pFarg->a[0].pExpr,pA1->iTable),
+ target);
+ }else{
+ sqlite3VdbeAddOp2(v, OP_Null, 0, target);
+ }
+ break;
+ }
+
#ifdef SQLITE_DEBUG
case INLINEFUNC_affinity: {
/* The AFFINITY() function evaluates to a string that describes