Beautify initialization of JsonValueList and JsonLikeRegexContext

Instead of tricky assignment to {0} introduce special macros, which
explicitly initialize every field.

diff --git a/src/backend/utils/adt/jsonpath_exec.c b/src/backend/utils/adt/jsonpath_exec.c
index c07225749e5620841f6345069d413cce641c320a..3f01b593d29050251f8123ec3cc1a7dd353b8951 100644 (file)
--- a/src/backend/utils/adt/jsonpath_exec.c
+++ b/src/backend/utils/adt/jsonpath_exec.c
@@ -126,6 +126,8 @@ typedef struct JsonLikeRegexContext
    int         cflags;
 } JsonLikeRegexContext;
 
+#define EmptyJsonLikeRegexContext  {NULL, 0}
+
 /* Result of jsonpath predicate evaluation */
 typedef enum JsonPathBool
 {
@@ -153,6 +155,8 @@ typedef struct JsonValueList
    List       *list;
 } JsonValueList;
 
+#define EmptyJsonValueList         {NULL, NIL}
+
 typedef struct JsonValueListIterator
 {
    JsonbValue *value;
@@ -321,7 +325,7 @@ jsonb_path_match(PG_FUNCTION_ARGS)
    Jsonb      *jb = PG_GETARG_JSONB_P(0);
    JsonPath   *jp = PG_GETARG_JSONPATH_P(1);
    JsonbValue *jbv;
-   JsonValueList found = {0};
+   JsonValueList found = EmptyJsonValueList;
    Jsonb      *vars = NULL;
    bool        silent = true;
 
@@ -379,7 +383,7 @@ jsonb_path_query(PG_FUNCTION_ARGS)
        MemoryContext oldcontext;
        Jsonb      *vars;
        bool        silent;
-       JsonValueList found = {0};
+       JsonValueList found = EmptyJsonValueList;
 
        funcctx = SRF_FIRSTCALL_INIT();
        oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
@@ -420,7 +424,7 @@ jsonb_path_query_array(FunctionCallInfo fcinfo)
 {
    Jsonb      *jb = PG_GETARG_JSONB_P(0);
    JsonPath   *jp = PG_GETARG_JSONPATH_P(1);
-   JsonValueList found = {0};
+   JsonValueList found = EmptyJsonValueList;
    Jsonb      *vars = PG_GETARG_JSONB_P(2);
    bool        silent = PG_GETARG_BOOL(3);
 
@@ -439,7 +443,7 @@ jsonb_path_query_first(FunctionCallInfo fcinfo)
 {
    Jsonb      *jb = PG_GETARG_JSONB_P(0);
    JsonPath   *jp = PG_GETARG_JSONPATH_P(1);
-   JsonValueList found = {0};
+   JsonValueList found = EmptyJsonValueList;
    Jsonb      *vars = PG_GETARG_JSONB_P(2);
    bool        silent = PG_GETARG_BOOL(3);
 
@@ -510,7 +514,7 @@ executeJsonPath(JsonPath *path, Jsonb *vars, Jsonb *json, bool throwErrors,
         * In strict mode we must get a complete list of values to check that
         * there are no errors at all.
         */
-       JsonValueList vals = {0};
+       JsonValueList vals = EmptyJsonValueList;
 
        res = executeItem(&cxt, &jsp, &jbv, &vals);
 
@@ -1134,7 +1138,7 @@ executeItemOptUnwrapResult(JsonPathExecContext *cxt, JsonPathItem *jsp,
 {
    if (unwrap && jspAutoUnwrap(cxt))
    {
-       JsonValueList seq = {0};
+       JsonValueList seq = EmptyJsonValueList;
        JsonValueListIterator it;
        JsonPathExecResult res = executeItem(cxt, jsp, jb, &seq);
        JsonbValue *item;
@@ -1262,7 +1266,7 @@ executeBoolItem(JsonPathExecContext *cxt, JsonPathItem *jsp,
                 * regexes, but we use Postgres regexes here.  'flags' is a
                 * string literal converted to integer flags at compile-time.
                 */
-               JsonLikeRegexContext lrcxt = {0};
+               JsonLikeRegexContext lrcxt = EmptyJsonLikeRegexContext;
 
                jspInitByBuffer(&larg, jsp->base,
                                jsp->content.like_regex.expr);
@@ -1280,7 +1284,7 @@ executeBoolItem(JsonPathExecContext *cxt, JsonPathItem *jsp,
                 * In strict mode we must get a complete list of values to
                 * check that there are no errors at all.
                 */
-               JsonValueList vals = {0};
+               JsonValueList vals = EmptyJsonValueList;
                JsonPathExecResult res =
                executeItemOptUnwrapResultNoThrow(cxt, &larg, jb,
                                                  false, &vals);
@@ -1432,8 +1436,8 @@ executePredicate(JsonPathExecContext *cxt, JsonPathItem *pred,
 {
    JsonPathExecResult res;
    JsonValueListIterator lseqit;
-   JsonValueList lseq = {0};
-   JsonValueList rseq = {0};
+   JsonValueList lseq = EmptyJsonValueList;
+   JsonValueList rseq = EmptyJsonValueList;
    JsonbValue *lval;
    bool        error = false;
    bool        found = false;
@@ -1511,8 +1515,8 @@ executeBinaryArithmExpr(JsonPathExecContext *cxt, JsonPathItem *jsp,
 {
    JsonPathExecResult jper;
    JsonPathItem elem;
-   JsonValueList lseq = {0};
-   JsonValueList rseq = {0};
+   JsonValueList lseq = EmptyJsonValueList;
+   JsonValueList rseq = EmptyJsonValueList;
    JsonbValue *lval;
    JsonbValue *rval;
    Numeric     res;
@@ -1586,7 +1590,7 @@ executeUnaryArithmExpr(JsonPathExecContext *cxt, JsonPathItem *jsp,
    JsonPathExecResult jper;
    JsonPathExecResult jper2;
    JsonPathItem elem;
-   JsonValueList seq = {0};
+   JsonValueList seq = EmptyJsonValueList;
    JsonValueListIterator it;
    JsonbValue *val;
    bool        hasNext;
@@ -2124,7 +2128,7 @@ getArrayIndex(JsonPathExecContext *cxt, JsonPathItem *jsp, JsonbValue *jb,
              int32 *index)
 {
    JsonbValue *jbv;
-   JsonValueList found = {0};
+   JsonValueList found = EmptyJsonValueList;
    JsonPathExecResult res = executeItem(cxt, jsp, jb, &found);
    Datum       numeric_index;
    bool        have_error = false;