diff options
Diffstat (limited to 'src/include/nodes/primnodes.h')
| -rw-r--r-- | src/include/nodes/primnodes.h | 14 |
1 files changed, 9 insertions, 5 deletions
diff --git a/src/include/nodes/primnodes.h b/src/include/nodes/primnodes.h index 5b7b87dea54..b0ef1952e8f 100644 --- a/src/include/nodes/primnodes.h +++ b/src/include/nodes/primnodes.h @@ -1669,15 +1669,19 @@ 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_expressions_mutator(). + * raw_expr is the user-specified value, while formatted_expr is the value + * obtained by coercing raw_expr to the type required by either the FORMAT + * clause or an enclosing node's RETURNING clause. + * + * When deparsing a JsonValueExpr, get_rule_expr() prints raw_expr. However, + * during the evaluation of a JsonValueExpr, the value of formatted_expr + * takes precedence over that of raw_expr. */ typedef struct JsonValueExpr { NodeTag type; - Expr *raw_expr; /* raw expression */ - Expr *formatted_expr; /* formatted expression */ + Expr *raw_expr; /* user-specified expression */ + Expr *formatted_expr; /* coerced formatted expression */ JsonFormat *format; /* FORMAT clause, if specified */ } JsonValueExpr; |