git.postgresql.org Git - postgresql.git/commitdiff

git projects / postgresql.git / commitdiff
? search:
summary | shortlog | log | commit | commitdiff | tree
raw | patch | inline | side by side (parent: e56cad8)
Refactor code into new JsonbValueAsText, and use it more
2019年9月20日 21:34:31 +0000 (18:34 -0300)
2019年9月20日 22:30:16 +0000 (19:30 -0300)
jsonb_object_field_text and jsonb_array_element_text both contained
identical copies of this code, so extract that into new routine
JsonbValueAsText. This can also be used in other places, to measurable
performance benefit: the jsonb_each() and jsonb_array_elements()
functions can use it for outputting text forms instead of their less
efficient current implementation (because we no longer need to build
intermediate a jsonb representation of each value).

Author: Nikita Glukhov
Discussion: https://postgr.es/m/7c417f90-f95f-247e-ba63-d95e39c0ad14@postgrespro.ru


diff --git a/src/backend/utils/adt/jsonfuncs.c b/src/backend/utils/adt/jsonfuncs.c
index 667f9d9563e66c786057367cce244a607a8f3b81..01b44f5c754da350f335d7fb1e8c84237c33d7c4 100644 (file)
--- a/src/backend/utils/adt/jsonfuncs.c
+++ b/src/backend/utils/adt/jsonfuncs.c
@@ -349,6 +349,7 @@ static Datum get_path_all(FunctionCallInfo fcinfo, bool as_text);
static text *get_worker(text *json, char **tpath, int *ipath, int npath,
bool normalize_results);
static Datum get_jsonb_path_all(FunctionCallInfo fcinfo, bool as_text);
+static text *JsonbValueAsText(JsonbValue *v);
/* semantic action functions for json_array_length */
static void alen_object_start(void *state);
@@ -761,39 +762,9 @@ jsonb_object_field_text(PG_FUNCTION_ARGS)
VARDATA_ANY(key),
VARSIZE_ANY_EXHDR(key));
- if (v != NULL)
- {
- text *result = NULL;
- switch (v->type)
- {
- case jbvNull:
- break;
- case jbvBool:
- result = cstring_to_text(v->val.boolean ? "true" : "false");
- break;
- case jbvString:
- result = cstring_to_text_with_len(v->val.string.val, v->val.string.len);
- break;
- case jbvNumeric:
- result = cstring_to_text(DatumGetCString(DirectFunctionCall1(numeric_out,
- PointerGetDatum(v->val.numeric))));
- break;
- case jbvBinary:
- {
- StringInfo jtext = makeStringInfo();
-
- (void) JsonbToCString(jtext, v->val.binary.data, -1);
- result = cstring_to_text_with_len(jtext->data, jtext->len);
- }
- break;
- default:
- elog(ERROR, "unrecognized jsonb type: %d", (int) v->type);
- }
-
- if (result)
- PG_RETURN_TEXT_P(result);
- }
+ if (v != NULL && v->type != jbvNull)
+ PG_RETURN_TEXT_P(JsonbValueAsText(v));
PG_RETURN_NULL();
}
@@ -878,39 +849,9 @@ jsonb_array_element_text(PG_FUNCTION_ARGS)
}
v = getIthJsonbValueFromContainer(&jb->root, element);
- if (v != NULL)
- {
- text *result = NULL;
-
- switch (v->type)
- {
- case jbvNull:
- break;
- case jbvBool:
- result = cstring_to_text(v->val.boolean ? "true" : "false");
- break;
- case jbvString:
- result = cstring_to_text_with_len(v->val.string.val, v->val.string.len);
- break;
- case jbvNumeric:
- result = cstring_to_text(DatumGetCString(DirectFunctionCall1(numeric_out,
- PointerGetDatum(v->val.numeric))));
- break;
- case jbvBinary:
- {
- StringInfo jtext = makeStringInfo();
- (void) JsonbToCString(jtext, v->val.binary.data, -1);
- result = cstring_to_text_with_len(jtext->data, jtext->len);
- }
- break;
- default:
- elog(ERROR, "unrecognized jsonb type: %d", (int) v->type);
- }
-
- if (result)
- PG_RETURN_TEXT_P(result);
- }
+ if (v != NULL && v->type != jbvNull)
+ PG_RETURN_TEXT_P(JsonbValueAsText(v));
PG_RETURN_NULL();
}
@@ -1548,6 +1489,53 @@ get_jsonb_path_all(FunctionCallInfo fcinfo, bool as_text)
}
}
+/*
+ * Return the text representation of the given JsonbValue.
+ */
+static text *
+JsonbValueAsText(JsonbValue *v)
+{
+ switch (v->type)
+ {
+ case jbvNull:
+ return NULL;
+
+ case jbvBool:
+ return v->val.boolean ?
+ cstring_to_text_with_len("true", 4) :
+ cstring_to_text_with_len("false", 5);
+
+ case jbvString:
+ return cstring_to_text_with_len(v->val.string.val,
+ v->val.string.len);
+
+ case jbvNumeric:
+ {
+ Datum cstr;
+
+ cstr = DirectFunctionCall1(numeric_out,
+ PointerGetDatum(v->val.numeric));
+
+ return cstring_to_text(DatumGetCString(cstr));
+ }
+
+ case jbvBinary:
+ {
+ StringInfoData jtext;
+
+ initStringInfo(&jtext);
+ (void) JsonbToCString(&jtext, v->val.binary.data,
+ v->val.binary.len);
+
+ return cstring_to_text_with_len(jtext.data, jtext.len);
+ }
+
+ default:
+ elog(ERROR, "unrecognized jsonb type: %d", (int) v->type);
+ return NULL;
+ }
+}
+
/*
* SQL function json_array_length(json) -> int
*/
@@ -1758,26 +1746,7 @@ each_worker_jsonb(FunctionCallInfo fcinfo, const char *funcname, bool as_text)
values[1] = (Datum) NULL;
}
else
- {
- text *sv;
-
- if (v.type == jbvString)
- {
- /* In text mode, scalar strings should be dequoted */
- sv = cstring_to_text_with_len(v.val.string.val, v.val.string.len);
- }
- else
- {
- /* Turn anything else into a json string */
- StringInfo jtext = makeStringInfo();
- Jsonb *jb = JsonbValueToJsonb(&v);
-
- (void) JsonbToCString(jtext, &jb->root, 0);
- sv = cstring_to_text_with_len(jtext->data, jtext->len);
- }
-
- values[1] = PointerGetDatum(sv);
- }
+ values[1] = PointerGetDatum(JsonbValueAsText(&v));
}
else
{
@@ -2053,13 +2022,7 @@ elements_worker_jsonb(FunctionCallInfo fcinfo, const char *funcname,
/* use the tmp context so we can clean up after each tuple is done */
old_cxt = MemoryContextSwitchTo(tmp_cxt);
- if (!as_text)
- {
- Jsonb *val = JsonbValueToJsonb(&v);
-
- values[0] = PointerGetDatum(val);
- }
- else
+ if (as_text)
{
if (v.type == jbvNull)
{
@@ -2068,26 +2031,14 @@ elements_worker_jsonb(FunctionCallInfo fcinfo, const char *funcname,
values[0] = (Datum) NULL;
}
else
- {
- text *sv;
-
- if (v.type == jbvString)
- {
- /* in text mode scalar strings should be dequoted */
- sv = cstring_to_text_with_len(v.val.string.val, v.val.string.len);
- }
- else
- {
- /* turn anything else into a json string */
- StringInfo jtext = makeStringInfo();
- Jsonb *jb = JsonbValueToJsonb(&v);
-
- (void) JsonbToCString(jtext, &jb->root, 0);
- sv = cstring_to_text_with_len(jtext->data, jtext->len);
- }
+ values[0] = PointerGetDatum(JsonbValueAsText(&v));
+ }
+ else
+ {
+ /* Not in text mode, just return the Jsonb */
+ Jsonb *val = JsonbValueToJsonb(&v);
- values[0] = PointerGetDatum(sv);
- }
+ values[0] = PointerGetDatum(val);
}
tuple = heap_form_tuple(ret_tdesc, values, nulls);
@@ -4430,7 +4381,6 @@ jsonb_delete_idx(PG_FUNCTION_ARGS)
/*
* SQL function jsonb_set(jsonb, text[], jsonb, boolean)
- *
*/
Datum
jsonb_set(PG_FUNCTION_ARGS)
@@ -4522,7 +4472,6 @@ jsonb_delete_path(PG_FUNCTION_ARGS)
/*
* SQL function jsonb_insert(jsonb, text[], jsonb, boolean)
- *
*/
Datum
jsonb_insert(PG_FUNCTION_ARGS)
This is the main PostgreSQL git repository.
RSS Atom

AltStyle によって変換されたページ (->オリジナル) /