diff options
Diffstat (limited to 'src/include/nodes/primnodes.h')
| -rw-r--r-- | src/include/nodes/primnodes.h | 8 |
1 files changed, 7 insertions, 1 deletions
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h index 792a743f72e..e1aadc39cfb 100644 --- a/src/include/nodes/primnodes.h +++ b/src/include/nodes/primnodes.h @@ -1264,6 +1264,8 @@ typedef struct CaseWhen * see build_coercion_expression(). * * Nested FieldStore/SubscriptingRef assignment expressions in INSERT/UPDATE; * see transformAssignmentIndirection(). + * * Placeholder for intermediate results in some SQL/JSON expression nodes, + * such as JsonConstructorExpr. * * The uses in CaseExpr and ArrayCoerceExpr are safe only to the extent that * there is not any other CaseExpr or ArrayCoerceExpr between the value source @@ -1593,12 +1595,16 @@ typedef struct JsonReturning /* * JsonValueExpr - * representation of JSON value expression (expr [FORMAT JsonFormat]) + * + * The actual value is obtained by evaluating formatted_expr. raw_expr is + * only there for displaying the original user-written expression and is not + * evaluated by ExecInterpExpr() and eval_const_exprs_mutator(). */ typedef struct JsonValueExpr { NodeTag type; Expr *raw_expr; /* raw expression */ - Expr *formatted_expr; /* formatted expression or NULL */ + Expr *formatted_expr; /* formatted expression */ JsonFormat *format; /* FORMAT clause, if specified */ } JsonValueExpr; |