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Fix JSON error reporting for many cases of erroneous string values.

The majority of error exit cases in json_lex_string() failed toset lex->token_terminator, causing problems for the error contextreporting code: it would see token_terminator less than token_startand do something more or less nuts. In v14 and up the end resultcould be as bad as a crash in report_json_context(). Olderversions accidentally avoided that fate; but all versions produceerror context lines that are far less useful than intended,because they'd stop at the end of the prior token instead ofcontinuing to where the actually-bad input is.To fix, invent some macros that make it less notationally painfulto do the right thing. Also add documentation about what thefunction is actually required to do; and in >= v14, add an assertionin report_json_context about token_terminator being sufficientlyfar advanced.Per report from Nikolay Shaplov. Back-patch to all supportedversions.Discussion:https://postgr.es/m/7332649.x5DLKWyVIX@thinkpad-pgpro

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3 files changed

+57

-32

lines changed

src
- backend/utils/adt
  - json.c
- test/regress/expected
  - json_encoding.out
  - json_encoding_1.out

3 files changed

+57

-32

lines changed

`‎src/backend/utils/adt/json.c‎`

Lines changed: 27 additions & 2 deletions

Original file line number	Diff line number	Diff line change
`@@ -750,6 +750,13 @@ json_lex(JsonLexContext *lex)`
`750`	`750`
`751`	`751`	`/*`
`752`	`752`	`* The next token in the input stream is known to be a string; lex it.`
	`753`	`+ *`
	`754`	`+ * If lex->strval isn't NULL, fill it with the decoded string.`
	`755`	`+ * Set lex->token_terminator to the end of the decoded input, and in`
	`756`	`+ * success cases, transfer its previous value to lex->prev_token_terminator.`
	`757`	`+ *`
	`758`	`+ * Note: be careful that all error cases advance lex->token_terminator`
	`759`	`+ * to the point after the character we detected the error on.`
`753`	`760`	`*/`
`754`	`761`	`staticinlinevoid`
`755`	`762`	`json_lex_string(JsonLexContext*lex)`
`@@ -837,33 +844,42 @@ json_lex_string(JsonLexContext *lex)`
`837`	`844`	`if (ch >=0xd800&&ch <=0xdbff)`
`838`	`845`	`{`
`839`	`846`	`if (hi_surrogate!=-1)`
	`847`	`+{`
	`848`	`+lex->token_terminator=s+pg_mblen(s);`
`840`	`849`	`ereport(ERROR,`
`841`	`850`	`(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),`
`842`	`851`	`errmsg("invalid input syntax for type %s",`
`843`	`852`	`"json"),`
`844`	`853`	`errdetail("Unicode high surrogate must not follow a high surrogate."),`
`845`	`854`	`report_json_context(lex)));`
	`855`	`+}`
`846`	`856`	`hi_surrogate= (ch&0x3ff) <<10;`
`847`	`857`	`continue;`
`848`	`858`	`}`
`849`	`859`	`elseif (ch >=0xdc00&&ch <=0xdfff)`
`850`	`860`	`{`
`851`	`861`	`if (hi_surrogate==-1)`
	`862`	`+{`
	`863`	`+lex->token_terminator=s+pg_mblen(s);`
`852`	`864`	`ereport(ERROR,`
`853`	`865`	`(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),`
`854`	`866`	`errmsg("invalid input syntax for type %s","json"),`
`855`	`867`	`errdetail("Unicode low surrogate must follow a high surrogate."),`
`856`	`868`	`report_json_context(lex)));`
	`869`	`+}`
`857`	`870`	`ch=0x10000+hi_surrogate+ (ch&0x3ff);`
`858`	`871`	`hi_surrogate=-1;`
`859`	`872`	`}`
`860`	`873`
`861`	`874`	`if (hi_surrogate!=-1)`
	`875`	`+{`
	`876`	`+lex->token_terminator=s+pg_mblen(s);`
`862`	`877`	`ereport(ERROR,`
`863`	`878`	`(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),`
`864`	`879`	`errmsg("invalid input syntax for type %s","json"),`
`865`	`880`	`errdetail("Unicode low surrogate must follow a high surrogate."),`
`866`	`881`	`report_json_context(lex)));`
	`882`	`+}`
`867`	`883`
`868`	`884`	`/*`
`869`	`885`	`* For UTF8, replace the escape sequence by the actual`
`@@ -875,6 +891,7 @@ json_lex_string(JsonLexContext *lex)`
`875`	`891`	`if (ch==0)`
`876`	`892`	`{`
`877`	`893`	`/* We can't allow this, since our TEXT type doesn't */`
	`894`	`+lex->token_terminator=s+pg_mblen(s);`
`878`	`895`	`ereport(ERROR,`
`879`	`896`	`(errcode(ERRCODE_UNTRANSLATABLE_CHARACTER),`
`880`	`897`	`errmsg("unsupported Unicode escape sequence"),`
`@@ -898,24 +915,27 @@ json_lex_string(JsonLexContext *lex)`
`898`	`915`	`}`
`899`	`916`	`else`
`900`	`917`	`{`
	`918`	`+lex->token_terminator=s+pg_mblen(s);`
`901`	`919`	`ereport(ERROR,`
`902`	`920`	`(errcode(ERRCODE_UNTRANSLATABLE_CHARACTER),`
`903`	`921`	`errmsg("unsupported Unicode escape sequence"),`
`904`	`922`	`errdetail("Unicode escape values cannot be used for code point values above 007F when the server encoding is not UTF8."),`
`905`	`923`	`report_json_context(lex)));`
`906`	`924`	`}`
`907`		`-`
`908`	`925`	`}`
`909`	`926`	`}`
`910`	`927`	`elseif (lex->strval!=NULL)`
`911`	`928`	`{`
`912`	`929`	`if (hi_surrogate!=-1)`
	`930`	`+{`
	`931`	`+lex->token_terminator=s+pg_mblen(s);`
`913`	`932`	`ereport(ERROR,`
`914`	`933`	`(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),`
`915`	`934`	`errmsg("invalid input syntax for type %s",`
`916`	`935`	`"json"),`
`917`	`936`	`errdetail("Unicode low surrogate must follow a high surrogate."),`
`918`	`937`	`report_json_context(lex)));`
	`938`	`+}`
`919`	`939`
`920`	`940`	`switch (*s)`
`921`	`941`	`{`
`@@ -968,28 +988,33 @@ json_lex_string(JsonLexContext *lex)`
`968`	`988`	`extract_mb_char(s)),`
`969`	`989`	`report_json_context(lex)));`
`970`	`990`	`}`
`971`		`-`
`972`	`991`	`}`
`973`	`992`	`elseif (lex->strval!=NULL)`
`974`	`993`	`{`
`975`	`994`	`if (hi_surrogate!=-1)`
	`995`	`+{`
	`996`	`+lex->token_terminator=s+pg_mblen(s);`
`976`	`997`	`ereport(ERROR,`
`977`	`998`	`(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),`
`978`	`999`	`errmsg("invalid input syntax for type %s","json"),`
`979`	`1000`	`errdetail("Unicode low surrogate must follow a high surrogate."),`
`980`	`1001`	`report_json_context(lex)));`
	`1002`	`+}`
`981`	`1003`
`982`	`1004`	`appendStringInfoChar(lex->strval,*s);`
`983`	`1005`	`}`
`984`	`1006`
`985`	`1007`	`}`
`986`	`1008`
`987`	`1009`	`if (hi_surrogate!=-1)`
	`1010`	`+{`
	`1011`	`+lex->token_terminator=s+pg_mblen(s);`
`988`	`1012`	`ereport(ERROR,`
`989`	`1013`	`(errcode(ERRCODE_INVALID_TEXT_REPRESENTATION),`
`990`	`1014`	`errmsg("invalid input syntax for type %s","json"),`
`991`	`1015`	`errdetail("Unicode low surrogate must follow a high surrogate."),`
`992`	`1016`	`report_json_context(lex)));`
	`1017`	`+}`
`993`	`1018`
`994`	`1019`	`/* Hooray, we found the end of the string! */`
`995`	`1020`	`lex->prev_token_terminator=lex->token_terminator;`

`‎src/test/regress/expected/json_encoding.out‎`

Lines changed: 12 additions & 12 deletions

Original file line number	Diff line number	Diff line change
`@@ -41,19 +41,19 @@ select json '{ "a": "\ud83d\ude04\ud83d\udc36" }' -> 'a' as correct_in_utf8;`
`41`	`41`	`select json '{ "a": "\ud83d\ud83d" }' -> 'a'; -- 2 high surrogates in a row`
`42`	`42`	`ERROR: invalid input syntax for type json`
`43`	`43`	`DETAIL: Unicode high surrogate must not follow a high surrogate.`
`44`		`-CONTEXT: JSON data, line 1: { "a":...`
	`44`	`+CONTEXT: JSON data, line 1: { "a": "\ud83d\ud83d...`
`45`	`45`	`select json '{ "a": "\ude04\ud83d" }' -> 'a'; -- surrogates in wrong order`
`46`	`46`	`ERROR: invalid input syntax for type json`
`47`	`47`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`48`		`-CONTEXT: JSON data, line 1: { "a":...`
	`48`	`+CONTEXT: JSON data, line 1: { "a": "\ude04...`
`49`	`49`	`select json '{ "a": "\ud83dX" }' -> 'a'; -- orphan high surrogate`
`50`	`50`	`ERROR: invalid input syntax for type json`
`51`	`51`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`52`		`-CONTEXT: JSON data, line 1: { "a":...`
	`52`	`+CONTEXT: JSON data, line 1: { "a": "\ud83dX...`
`53`	`53`	`select json '{ "a": "\ude04X" }' -> 'a'; -- orphan low surrogate`
`54`	`54`	`ERROR: invalid input syntax for type json`
`55`	`55`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`56`		`-CONTEXT: JSON data, line 1: { "a":...`
	`56`	`+CONTEXT: JSON data, line 1: { "a": "\ude04...`
`57`	`57`	`--handling of simple unicode escapes`
`58`	`58`	`select json '{ "a": "the Copyright \u00a9 sign" }' as correct_in_utf8;`
`59`	`59`	`correct_in_utf8`
`@@ -106,7 +106,7 @@ select json '{ "a": "dollar \\u0024 character" }' ->> 'a' as not_an_escape;`
`106`	`106`	`select json '{ "a": "null \u0000 escape" }' ->> 'a' as fails;`
`107`	`107`	`ERROR: unsupported Unicode escape sequence`
`108`	`108`	`DETAIL: \u0000 cannot be converted to text.`
`109`		`-CONTEXT: JSON data, line 1: { "a":...`
	`109`	`+CONTEXT: JSON data, line 1: { "a": "null \u0000...`
`110`	`110`	`select json '{ "a": "null \\u0000 escape" }' ->> 'a' as not_an_escape;`
`111`	`111`	`not_an_escape`
`112`	`112`	`--------------------`
`@@ -144,7 +144,7 @@ ERROR: unsupported Unicode escape sequence`
`144`	`144`	`LINE 1: SELECT '"\u0000"'::jsonb;`
`145`	`145`	`^`
`146`	`146`	`DETAIL: \u0000 cannot be converted to text.`
`147`		`-CONTEXT: JSON data, line 1: ...`
	`147`	`+CONTEXT: JSON data, line 1:"\u0000...`
`148`	`148`	`-- use octet_length here so we don't get an odd unicode char in the`
`149`	`149`	`-- output`
`150`	`150`	`SELECT octet_length('"\uaBcD"'::jsonb::text); -- OK, uppercase and lower case both OK`
`@@ -165,25 +165,25 @@ ERROR: invalid input syntax for type json`
`165`	`165`	`LINE 1: SELECT jsonb '{ "a": "\ud83d\ud83d" }' -> 'a';`
`166`	`166`	`^`
`167`	`167`	`DETAIL: Unicode high surrogate must not follow a high surrogate.`
`168`		`-CONTEXT: JSON data, line 1: { "a":...`
	`168`	`+CONTEXT: JSON data, line 1: { "a": "\ud83d\ud83d...`
`169`	`169`	`SELECT jsonb '{ "a": "\ude04\ud83d" }' -> 'a'; -- surrogates in wrong order`
`170`	`170`	`ERROR: invalid input syntax for type json`
`171`	`171`	`LINE 1: SELECT jsonb '{ "a": "\ude04\ud83d" }' -> 'a';`
`172`	`172`	`^`
`173`	`173`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`174`		`-CONTEXT: JSON data, line 1: { "a":...`
	`174`	`+CONTEXT: JSON data, line 1: { "a": "\ude04...`
`175`	`175`	`SELECT jsonb '{ "a": "\ud83dX" }' -> 'a'; -- orphan high surrogate`
`176`	`176`	`ERROR: invalid input syntax for type json`
`177`	`177`	`LINE 1: SELECT jsonb '{ "a": "\ud83dX" }' -> 'a';`
`178`	`178`	`^`
`179`	`179`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`180`		`-CONTEXT: JSON data, line 1: { "a":...`
	`180`	`+CONTEXT: JSON data, line 1: { "a": "\ud83dX...`
`181`	`181`	`SELECT jsonb '{ "a": "\ude04X" }' -> 'a'; -- orphan low surrogate`
`182`	`182`	`ERROR: invalid input syntax for type json`
`183`	`183`	`LINE 1: SELECT jsonb '{ "a": "\ude04X" }' -> 'a';`
`184`	`184`	`^`
`185`	`185`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`186`		`-CONTEXT: JSON data, line 1: { "a":...`
	`186`	`+CONTEXT: JSON data, line 1: { "a": "\ude04...`
`187`	`187`	`-- handling of simple unicode escapes`
`188`	`188`	`SELECT jsonb '{ "a": "the Copyright \u00a9 sign" }' as correct_in_utf8;`
`189`	`189`	`correct_in_utf8`
`@@ -208,7 +208,7 @@ ERROR: unsupported Unicode escape sequence`
`208`	`208`	`LINE 1: SELECT jsonb '{ "a": "null \u0000 escape" }' as fails;`
`209`	`209`	`^`
`210`	`210`	`DETAIL: \u0000 cannot be converted to text.`
`211`		`-CONTEXT: JSON data, line 1: { "a":...`
	`211`	`+CONTEXT: JSON data, line 1: { "a": "null \u0000...`
`212`	`212`	`SELECT jsonb '{ "a": "null \\u0000 escape" }' as not_an_escape;`
`213`	`213`	`not_an_escape`
`214`	`214`	`------------------------------`
`@@ -238,7 +238,7 @@ ERROR: unsupported Unicode escape sequence`
`238`	`238`	`LINE 1: SELECT jsonb '{ "a": "null \u0000 escape" }' ->> 'a' as fai...`
`239`	`239`	`^`
`240`	`240`	`DETAIL: \u0000 cannot be converted to text.`
`241`		`-CONTEXT: JSON data, line 1: { "a":...`
	`241`	`+CONTEXT: JSON data, line 1: { "a": "null \u0000...`
`242`	`242`	`SELECT jsonb '{ "a": "null \\u0000 escape" }' ->> 'a' as not_an_escape;`
`243`	`243`	`not_an_escape`
`244`	`244`	`--------------------`

`‎src/test/regress/expected/json_encoding_1.out‎`

Lines changed: 18 additions & 18 deletions

Original file line number	Diff line number	Diff line change
`@@ -35,23 +35,23 @@ SELECT '"\uaBcD"'::json;-- OK, uppercase and lower case both OK`
`35`	`35`	`select json '{ "a": "\ud83d\ude04\ud83d\udc36" }' -> 'a' as correct_in_utf8;`
`36`	`36`	`ERROR: unsupported Unicode escape sequence`
`37`	`37`	`DETAIL: Unicode escape values cannot be used for code point values above 007F when the server encoding is not UTF8.`
`38`		`-CONTEXT: JSON data, line 1: { "a":...`
	`38`	`+CONTEXT: JSON data, line 1: { "a": "\ud83d\ude04...`
`39`	`39`	`select json '{ "a": "\ud83d\ud83d" }' -> 'a'; -- 2 high surrogates in a row`
`40`	`40`	`ERROR: invalid input syntax for type json`
`41`	`41`	`DETAIL: Unicode high surrogate must not follow a high surrogate.`
`42`		`-CONTEXT: JSON data, line 1: { "a":...`
	`42`	`+CONTEXT: JSON data, line 1: { "a": "\ud83d\ud83d...`
`43`	`43`	`select json '{ "a": "\ude04\ud83d" }' -> 'a'; -- surrogates in wrong order`
`44`	`44`	`ERROR: invalid input syntax for type json`
`45`	`45`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`46`		`-CONTEXT: JSON data, line 1: { "a":...`
	`46`	`+CONTEXT: JSON data, line 1: { "a": "\ude04...`
`47`	`47`	`select json '{ "a": "\ud83dX" }' -> 'a'; -- orphan high surrogate`
`48`	`48`	`ERROR: invalid input syntax for type json`
`49`	`49`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`50`		`-CONTEXT: JSON data, line 1: { "a":...`
	`50`	`+CONTEXT: JSON data, line 1: { "a": "\ud83dX...`
`51`	`51`	`select json '{ "a": "\ude04X" }' -> 'a'; -- orphan low surrogate`
`52`	`52`	`ERROR: invalid input syntax for type json`
`53`	`53`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`54`		`-CONTEXT: JSON data, line 1: { "a":...`
	`54`	`+CONTEXT: JSON data, line 1: { "a": "\ude04...`
`55`	`55`	`--handling of simple unicode escapes`
`56`	`56`	`select json '{ "a": "the Copyright \u00a9 sign" }' as correct_in_utf8;`
`57`	`57`	`correct_in_utf8`
`@@ -86,7 +86,7 @@ select json '{ "a": "null \\u0000 escape" }' as not_an_escape;`
`86`	`86`	`select json '{ "a": "the Copyright \u00a9 sign" }' ->> 'a' as correct_in_utf8;`
`87`	`87`	`ERROR: unsupported Unicode escape sequence`
`88`	`88`	`DETAIL: Unicode escape values cannot be used for code point values above 007F when the server encoding is not UTF8.`
`89`		`-CONTEXT: JSON data, line 1: { "a":...`
	`89`	`+CONTEXT: JSON data, line 1: { "a": "the Copyright \u00a9...`
`90`	`90`	`select json '{ "a": "dollar \u0024 character" }' ->> 'a' as correct_everywhere;`
`91`	`91`	`correct_everywhere`
`92`	`92`	`--------------------`
`@@ -102,7 +102,7 @@ select json '{ "a": "dollar \\u0024 character" }' ->> 'a' as not_an_escape;`
`102`	`102`	`select json '{ "a": "null \u0000 escape" }' ->> 'a' as fails;`
`103`	`103`	`ERROR: unsupported Unicode escape sequence`
`104`	`104`	`DETAIL: \u0000 cannot be converted to text.`
`105`		`-CONTEXT: JSON data, line 1: { "a":...`
	`105`	`+CONTEXT: JSON data, line 1: { "a": "null \u0000...`
`106`	`106`	`select json '{ "a": "null \\u0000 escape" }' ->> 'a' as not_an_escape;`
`107`	`107`	`not_an_escape`
`108`	`108`	`--------------------`
`@@ -140,53 +140,53 @@ ERROR: unsupported Unicode escape sequence`
`140`	`140`	`LINE 1: SELECT '"\u0000"'::jsonb;`
`141`	`141`	`^`
`142`	`142`	`DETAIL: \u0000 cannot be converted to text.`
`143`		`-CONTEXT: JSON data, line 1: ...`
	`143`	`+CONTEXT: JSON data, line 1:"\u0000...`
`144`	`144`	`-- use octet_length here so we don't get an odd unicode char in the`
`145`	`145`	`-- output`
`146`	`146`	`SELECT octet_length('"\uaBcD"'::jsonb::text); -- OK, uppercase and lower case both OK`
`147`	`147`	`ERROR: unsupported Unicode escape sequence`
`148`	`148`	`LINE 1: SELECT octet_length('"\uaBcD"'::jsonb::text);`
`149`	`149`	`^`
`150`	`150`	`DETAIL: Unicode escape values cannot be used for code point values above 007F when the server encoding is not UTF8.`
`151`		`-CONTEXT: JSON data, line 1: ...`
	`151`	`+CONTEXT: JSON data, line 1:"\uaBcD...`
`152`	`152`	`-- handling of unicode surrogate pairs`
`153`	`153`	`SELECT octet_length((jsonb '{ "a": "\ud83d\ude04\ud83d\udc36" }' -> 'a')::text) AS correct_in_utf8;`
`154`	`154`	`ERROR: unsupported Unicode escape sequence`
`155`	`155`	`LINE 1: SELECT octet_length((jsonb '{ "a": "\ud83d\ude04\ud83d\udc3...`
`156`	`156`	`^`
`157`	`157`	`DETAIL: Unicode escape values cannot be used for code point values above 007F when the server encoding is not UTF8.`
`158`		`-CONTEXT: JSON data, line 1: { "a":...`
	`158`	`+CONTEXT: JSON data, line 1: { "a": "\ud83d\ude04...`
`159`	`159`	`SELECT jsonb '{ "a": "\ud83d\ud83d" }' -> 'a'; -- 2 high surrogates in a row`
`160`	`160`	`ERROR: invalid input syntax for type json`
`161`	`161`	`LINE 1: SELECT jsonb '{ "a": "\ud83d\ud83d" }' -> 'a';`
`162`	`162`	`^`
`163`	`163`	`DETAIL: Unicode high surrogate must not follow a high surrogate.`
`164`		`-CONTEXT: JSON data, line 1: { "a":...`
	`164`	`+CONTEXT: JSON data, line 1: { "a": "\ud83d\ud83d...`
`165`	`165`	`SELECT jsonb '{ "a": "\ude04\ud83d" }' -> 'a'; -- surrogates in wrong order`
`166`	`166`	`ERROR: invalid input syntax for type json`
`167`	`167`	`LINE 1: SELECT jsonb '{ "a": "\ude04\ud83d" }' -> 'a';`
`168`	`168`	`^`
`169`	`169`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`170`		`-CONTEXT: JSON data, line 1: { "a":...`
	`170`	`+CONTEXT: JSON data, line 1: { "a": "\ude04...`
`171`	`171`	`SELECT jsonb '{ "a": "\ud83dX" }' -> 'a'; -- orphan high surrogate`
`172`	`172`	`ERROR: invalid input syntax for type json`
`173`	`173`	`LINE 1: SELECT jsonb '{ "a": "\ud83dX" }' -> 'a';`
`174`	`174`	`^`
`175`	`175`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`176`		`-CONTEXT: JSON data, line 1: { "a":...`
	`176`	`+CONTEXT: JSON data, line 1: { "a": "\ud83dX...`
`177`	`177`	`SELECT jsonb '{ "a": "\ude04X" }' -> 'a'; -- orphan low surrogate`
`178`	`178`	`ERROR: invalid input syntax for type json`
`179`	`179`	`LINE 1: SELECT jsonb '{ "a": "\ude04X" }' -> 'a';`
`180`	`180`	`^`
`181`	`181`	`DETAIL: Unicode low surrogate must follow a high surrogate.`
`182`		`-CONTEXT: JSON data, line 1: { "a":...`
	`182`	`+CONTEXT: JSON data, line 1: { "a": "\ude04...`
`183`	`183`	`-- handling of simple unicode escapes`
`184`	`184`	`SELECT jsonb '{ "a": "the Copyright \u00a9 sign" }' as correct_in_utf8;`
`185`	`185`	`ERROR: unsupported Unicode escape sequence`
`186`	`186`	`LINE 1: SELECT jsonb '{ "a": "the Copyright \u00a9 sign" }' as corr...`
`187`	`187`	`^`
`188`	`188`	`DETAIL: Unicode escape values cannot be used for code point values above 007F when the server encoding is not UTF8.`
`189`		`-CONTEXT: JSON data, line 1: { "a":...`
	`189`	`+CONTEXT: JSON data, line 1: { "a": "the Copyright \u00a9...`
`190`	`190`	`SELECT jsonb '{ "a": "dollar \u0024 character" }' as correct_everywhere;`
`191`	`191`	`correct_everywhere`
`192`	`192`	`-----------------------------`
`@@ -204,7 +204,7 @@ ERROR: unsupported Unicode escape sequence`
`204`	`204`	`LINE 1: SELECT jsonb '{ "a": "null \u0000 escape" }' as fails;`
`205`	`205`	`^`
`206`	`206`	`DETAIL: \u0000 cannot be converted to text.`
`207`		`-CONTEXT: JSON data, line 1: { "a":...`
	`207`	`+CONTEXT: JSON data, line 1: { "a": "null \u0000...`
`208`	`208`	`SELECT jsonb '{ "a": "null \\u0000 escape" }' as not_an_escape;`
`209`	`209`	`not_an_escape`
`210`	`210`	`------------------------------`
`@@ -216,7 +216,7 @@ ERROR: unsupported Unicode escape sequence`
`216`	`216`	`LINE 1: SELECT jsonb '{ "a": "the Copyright \u00a9 sign" }' ->> 'a'...`
`217`	`217`	`^`
`218`	`218`	`DETAIL: Unicode escape values cannot be used for code point values above 007F when the server encoding is not UTF8.`
`219`		`-CONTEXT: JSON data, line 1: { "a":...`
	`219`	`+CONTEXT: JSON data, line 1: { "a": "the Copyright \u00a9...`
`220`	`220`	`SELECT jsonb '{ "a": "dollar \u0024 character" }' ->> 'a' as correct_everywhere;`
`221`	`221`	`correct_everywhere`
`222`	`222`	`--------------------`
`@@ -234,7 +234,7 @@ ERROR: unsupported Unicode escape sequence`
`234`	`234`	`LINE 1: SELECT jsonb '{ "a": "null \u0000 escape" }' ->> 'a' as fai...`
`235`	`235`	`^`
`236`	`236`	`DETAIL: \u0000 cannot be converted to text.`
`237`		`-CONTEXT: JSON data, line 1: { "a":...`
	`237`	`+CONTEXT: JSON data, line 1: { "a": "null \u0000...`
`238`	`238`	`SELECT jsonb '{ "a": "null \\u0000 escape" }' ->> 'a' as not_an_escape;`
`239`	`239`	`not_an_escape`
`240`	`240`	`--------------------`

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3 files changed

3 files changed

`‎src/backend/utils/adt/json.c‎`

`‎src/test/regress/expected/json_encoding.out‎`

`‎src/test/regress/expected/json_encoding_1.out‎`

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