diff options
Diffstat (limited to 'src/backend/executor/execExpr.c')
| -rw-r--r-- | src/backend/executor/execExpr.c | 19 |
1 files changed, 14 insertions, 5 deletions
diff --git a/src/backend/executor/execExpr.c b/src/backend/executor/execExpr.c index 5ee59ef6692..209318680e3 100644 --- a/src/backend/executor/execExpr.c +++ b/src/backend/executor/execExpr.c @@ -2783,11 +2783,14 @@ ExecInitSubscriptingRef(ExprEvalStep *scratch, SubscriptingRef *sbsref, * (We could use this in FieldStore too, but in that case passing the old * value is so cheap there's no need.) * - * Note: it might seem that this needs to recurse, but it does not; the - * CaseTestExpr, if any, will be directly the arg or refexpr of the top-level - * node. Nested-assignment situations give rise to expression trees in which - * each level of assignment has its own CaseTestExpr, and the recursive - * structure appears within the newvals or refassgnexpr field. + * Note: it might seem that this needs to recurse, but in most cases it does + * not; the CaseTestExpr, if any, will be directly the arg or refexpr of the + * top-level node. Nested-assignment situations give rise to expression + * trees in which each level of assignment has its own CaseTestExpr, and the + * recursive structure appears within the newvals or refassgnexpr field. + * There is an exception, though: if the array is an array-of-domain, we will + * have a CoerceToDomain as the refassgnexpr, and we need to be able to look + * through that. */ static bool isAssignmentIndirectionExpr(Expr *expr) @@ -2808,6 +2811,12 @@ isAssignmentIndirectionExpr(Expr *expr) if (sbsRef->refexpr && IsA(sbsRef->refexpr, CaseTestExpr)) return true; } + else if (IsA(expr, CoerceToDomain)) + { + CoerceToDomain *cd = (CoerceToDomain *) expr; + + return isAssignmentIndirectionExpr(cd->arg); + } return false; } |