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Throw error in jsonb_path_match() when result is not single boolean 

jsonb_path_match() checks if jsonb document matches jsonpath query.  Therefore,
jsonpath query should return single boolean.  Currently, if result of jsonpath
is not a single boolean, NULL is returned independently whether silent mode
is on or off.  But that appears to be wrong when silent mode is off.  This
commit makes jsonb_path_match() throw an error in this case.

Author: Nikita Glukhov
This commit is contained in:
Alexander Korotkov 2019-04-01 18:09:20 +03:00
parent 2e643501e5
commit b4cc19ab01
3 changed files with 80 additions and 9 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

26
src/backend/utils/adt/jsonpath_exec.c
View File

@ -320,7 +320,6 @@ 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};
Jsonb *vars = NULL;
bool silent = true;
@ -333,18 +332,27 @@ jsonb_path_match(PG_FUNCTION_ARGS)
(void) executeJsonPath(jp, vars, jb, !silent, &found);
if (JsonValueListLength(&found) < 1)
PG_RETURN_NULL();
jbv = JsonValueListHead(&found);
PG_FREE_IF_COPY(jb, 0);
PG_FREE_IF_COPY(jp, 1);
if (jbv->type != jbvBool)
PG_RETURN_NULL();
if (JsonValueListLength(&found) == 1)
{
JsonbValue *jbv = JsonValueListHead(&found);
PG_RETURN_BOOL(jbv->val.boolean);
if (jbv->type == jbvBool)
PG_RETURN_BOOL(jbv->val.boolean);
if (jbv->type == jbvNull)
PG_RETURN_NULL();
}
if (!silent)
ereport(ERROR,
(errcode(ERRCODE_SINGLETON_JSON_ITEM_REQUIRED),
errmsg(ERRMSG_SINGLETON_JSON_ITEM_REQUIRED),
errdetail("expression should return a singleton boolean")));
PG_RETURN_NULL();
}
/*

51
src/test/regress/expected/jsonb_jsonpath.out
View File

@ -1769,6 +1769,57 @@ SELECT jsonb_path_exists('[{"a": 1}, {"a": 2}, {"a": 3}, {"a": 5}]', '$[*] ? (@.
f
(1 row)
SELECT jsonb_path_match('true', '$', silent => false);
jsonb_path_match
------------------
t
(1 row)
SELECT jsonb_path_match('false', '$', silent => false);
jsonb_path_match
------------------
f
(1 row)
SELECT jsonb_path_match('null', '$', silent => false);
jsonb_path_match
------------------
(1 row)
SELECT jsonb_path_match('1', '$', silent => true);
jsonb_path_match
------------------
(1 row)
SELECT jsonb_path_match('1', '$', silent => false);
ERROR: singleton SQL/JSON item required
DETAIL: expression should return a singleton boolean
SELECT jsonb_path_match('"a"', '$', silent => false);
ERROR: singleton SQL/JSON item required
DETAIL: expression should return a singleton boolean
SELECT jsonb_path_match('{}', '$', silent => false);
ERROR: singleton SQL/JSON item required
DETAIL: expression should return a singleton boolean
SELECT jsonb_path_match('[true]', '$', silent => false);
ERROR: singleton SQL/JSON item required
DETAIL: expression should return a singleton boolean
SELECT jsonb_path_match('{}', 'lax $.a', silent => false);
ERROR: singleton SQL/JSON item required
DETAIL: expression should return a singleton boolean
SELECT jsonb_path_match('{}', 'strict $.a', silent => false);
ERROR: SQL/JSON member not found
DETAIL: JSON object does not contain key "a"
SELECT jsonb_path_match('{}', 'strict $.a', silent => true);
jsonb_path_match
------------------
(1 row)
SELECT jsonb_path_match('[true, true]', '$[*]', silent => false);
ERROR: singleton SQL/JSON item required
DETAIL: expression should return a singleton boolean
SELECT jsonb '[{"a": 1}, {"a": 2}]' @@ '$[*].a > 1';
?column?
----------

12
src/test/regress/sql/jsonb_jsonpath.sql
View File

@ -366,6 +366,18 @@ SELECT jsonb_path_exists('[{"a": 1}, {"a": 2}]', '$[*].a ? (@ > 1)');
SELECT jsonb_path_exists('[{"a": 1}, {"a": 2}, {"a": 3}, {"a": 5}]', '$[*] ? (@.a > $min && @.a < $max)', vars => '{"min": 1, "max": 4}');
SELECT jsonb_path_exists('[{"a": 1}, {"a": 2}, {"a": 3}, {"a": 5}]', '$[*] ? (@.a > $min && @.a < $max)', vars => '{"min": 3, "max": 4}');
SELECT jsonb_path_match('true', '$', silent => false);
SELECT jsonb_path_match('false', '$', silent => false);
SELECT jsonb_path_match('null', '$', silent => false);
SELECT jsonb_path_match('1', '$', silent => true);
SELECT jsonb_path_match('1', '$', silent => false);
SELECT jsonb_path_match('"a"', '$', silent => false);
SELECT jsonb_path_match('{}', '$', silent => false);
SELECT jsonb_path_match('[true]', '$', silent => false);
SELECT jsonb_path_match('{}', 'lax $.a', silent => false);
SELECT jsonb_path_match('{}', 'strict $.a', silent => false);
SELECT jsonb_path_match('{}', 'strict $.a', silent => true);
SELECT jsonb_path_match('[true, true]', '$[*]', silent => false);
SELECT jsonb '[{"a": 1}, {"a": 2}]' @@ '$[*].a > 1';
SELECT jsonb '[{"a": 1}, {"a": 2}]' @@ '$[*].a > 2';
SELECT jsonb_path_match('[{"a": 1}, {"a": 2}]', '$[*].a > 1');