For the "relaxed" quoting mode of QRF, tighten the restrictions on what

must be quoted to help prevent strings that actually look like numbers
from going unquoted.
[bugs:/info/2026-10-24T04:41:27Z|Bug 2026-10-24T04:41:27Z]

FossilOrigin-Name: 7c8c79a443e025f32035ec91d8c32e032996f1b798444b5b1b5ce98d759f1338

ext/qrf/qrf.c

@@ -861,15 +861,23 @@ static int qrfRelaxable(Qrf *p, const char *z){
   if( p->spec.zNull && strcmp(p->spec.zNull,z)==0 ) return 0;
   i = (z[0]=='-' || z[0]=='+');
   if( strcmp(z+i,"Inf")==0 ) return 0;
-  if( !qrfDigit(z[i]) ) return 1;
-  i++;
+  if( z[i]=='0' && (z[i+1]=='x' || z[i+1]=='X') ){
+    /* Hexadecimal integer literal: 0x1f */
+    i += 2;
+    n = strspn(&z[i], "0123456789abcdefABCDEF");
+    return n==0 || z[i+n]!=0;
+  }
+  if( z[i]=='.' && qrfDigit(z[i+1]) ){
+    /* Real literal with no digits before the ".", such as ".5" */
+    i++;
+  }else if( !qrfDigit(z[i]) ){
+    return 1;
+  }else{
+    while( qrfDigit(z[i]) ){ i++; }
+    if( z[i]=='.' ) i++;
+  }
   while( qrfDigit(z[i]) ){ i++; }
   if( z[i]==0 ) return 0;
-  if( z[i]=='.' ){
-    i++;
-    while( qrfDigit(z[i]) ){ i++; }
-    if( z[i]==0 ) return 0;
-  }
   if( z[i]=='e' || z[i]=='E' ){
     i++;
     if( z[i]=='+' || z[i]=='-' ){ i++; }

manifest

@@ -1,5 +1,5 @@
-C Use\s64-bit\smath\sto\savoid\sinteger\soverflow\sin\sunixSleep()\son\sthe\srare\nsystems\sthat\slack\sboth\susleep()\sand\snanosleep().\n[bugs:/info/2026-10-24T09:43:25Z|Bug\s2026-10-24T09:43:25Z]
-D 2026-10-24T14:54:49.869
+C For\sthe\s"relaxed"\squoting\smode\sof\sQRF,\stighten\sthe\srestrictions\son\swhat\nmust\sbe\squoted\sto\shelp\sprevent\sstrings\sthat\sactually\slook\slike\snumbers\nfrom\sgoing\sunquoted.\n[bugs:/info/2026-10-24T04:41:27Z|Bug\s2026-10-24T04:41:27Z]
+D 2026-10-24T15:10:50.142
 F .fossil-settings/binary-glob 61195414528fb3ea9693577e1980230d78a1f8b0a54c78cf1b9b24d0a409ed6a x
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
@@ -427,7 +427,7 @@ F ext/misc/zipfile.c 842a31a19997cd53da5ae1920d783e3032ad34eecb5da91bc483ae5b551
 F ext/misc/zorder.c bddff2e1b9661a90c95c2a9a9c7ecd8908afab5763256294dd12d609d4664eee
 F ext/qrf/README.md 394a70c5cda1d0f57c82434751b0174a594b1c8800c8584fad6091e867cd5a90
 F ext/qrf/dev-notes.md e68a6d91ce4c7eb296ef2daadc2bb79c95c317ad15b9fafe40850c67b29c2430
-F ext/qrf/qrf.c e2dd40a06b68da9c64cdc2fa35ba07e7e70edb0e103e968ce9404fe003d43388
+F ext/qrf/qrf.c 7a66d65194d104aba8d0684067ac57b4cd894c3881878af2835d7e0a1839ce2e
 F ext/qrf/qrf.h b04e50048695aa4a5a41577fb4a56c1feed0bef816354995713116780a4bdacb
 F ext/rbu/rbu.c 801450b24eaf14440d8fd20385aacc751d5c9d6123398df41b1b5aa804bf4ce8
 F ext/rbu/rbu1.test 25870dd7db7eb5597e2b4d6e29e7a7e095abf332660f67d89959552ce8f8f255
@@ -1539,7 +1539,7 @@ F test/mmapcorrupt.test 470fb44fe92e99c1d23701d156f8c17865f5b027063c9119dcfdb842
 F test/mmapfault.test d4c9eff9cd8c2dc14bc43e71e042f175b0a26fe3
 F test/mmapleak.test 7542cafa4771abba531d072ea905f474a2875a153337a04f327f0a9319cdb72c
 F test/mmapwarm.test 2272005969cd17a910077bd5082f70bc1fefad9a875afec7fc9af483898ecaf3
-F test/modeA.sql eef62974043e90d9d13b3f6921b94f35c008239bf41531432d6e82369b792bbd
+F test/modeA.sql 36c366badb91f37719ab302c57fbccf8cdb621937856596820e62ac566d13f11
 F test/multiplex.test d74c034e52805f6de8cc5432cef8c9eb774bb64ec29b83a22effc8ca4dac1f08
 F test/multiplex2.test 580ca5817c7edbe4cc68fa150609c9473393003a
 F test/multiplex3.test fac575e0b1b852025575a6a8357701d80933e98b5d2fe6d35ddaa68f92f6a1f7
@@ -2300,8 +2300,8 @@ F tool/warnings-clang.sh bbf6a1e685e534c92ec2bfba5b1745f34fb6f0bc2a362850723a9ee
 F tool/warnings.sh a554d13f6e5cf3760f041b87939e3d616ec6961859c3245e8ef701d1eafc2ca2
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
 F tool/winmain.c 00c8fb88e365c9017db14c73d3c78af62194d9644feaf60e220ab0f411f3604c
-P a5261fd58070d4cb10c627e54491ed7588d96f47073b19612aa669f684e8e5b5
-R b0ab9e87deeb2a167c99641f1b3ff24b
+P 458351f9725a423bba4672b83c3f1fd446de2559f416b3877514a0ccb8d4df0e
+R 46cabcdcb89f3a6a1143bb0dec318482
 U drh
-Z a9a1e1ce16596a6b93e048312922a956
+Z b68768be52beeb00d0e55ab3384aa851
 # Remove this line to create a well-formed Fossil manifest.

manifest.uuid

@@ -1 +1 @@
-458351f9725a423bba4672b83c3f1fd446de2559f416b3877514a0ccb8d4df0e
+7c8c79a443e025f32035ec91d8c32e032996f1b798444b5b1b5ce98d759f1338

test/modeA.sql

@@ -757,3 +757,73 @@ INSERT INTO t VALUES(0.30000000000000004);
 INSERT INTO t VALUES(123456789.12345679);
 COMMIT;
 END
+
+# Bug 2026-10-24T04:41:27Z
+#
+# Relaxed quoting must quote text values that look like real literals
+# with no digits before the "." and text values that look like
+# hexadecimal integer literals.
+#
+.open :memory:
+.mode tty
+.testcase 1600
+SELECT '.5' AS a, '0.5' AS b, 0.5 AS c, '-.5' AS d, '0x10' AS e, 0x10 AS f;
+.check <<END
+╭──────┬───────┬─────┬───────┬────────┬────╮
+│  a   │   b   │  c  │   d   │   e    │ f  │
+╞══════╪═══════╪═════╪═══════╪════════╪════╡
+│ '.5' │ '0.5' │ 0.5 │ '-.5' │ '0x10' │ 16 │
+╰──────┴───────┴─────┴───────┴────────┴────╯
+END
+.testcase 1610
+CREATE TABLE t2(a,b);
+INSERT INTO t2(a,b) VALUES
+  (1,'.5'),
+  (1,'-.5'),
+  (1,'+.5'),
+  (1,'.5e3'),
+  (1,'.5E-3'),
+  (1,'5.'),
+  (0,'.'),
+  (0,'-.'),
+  (0,'.e5'),
+  (0,'.5.5'),
+  (0,'.5x'),
+  (0,'.5e'),
+  (1,'0x1F'),
+  (1,'0X1f'),
+  (1,'-0x10'),
+  (1,'+0xabcdef'),
+  (0,'0x'),
+  (0,'0x1G'),
+  (0,'0x1.5'),
+  (0,'x10'),
+  (0,'1x10');
+SELECT if(a,'yes','') AS 'quoted?', b AS string FROM t2 ORDER BY rowid;
+.check <<END
+╭─────────┬─────────────╮
+│ quoted? │   string    │
+╞═════════╪═════════════╡
+│ yes     │ '.5'        │
+│ yes     │ '-.5'       │
+│ yes     │ '+.5'       │
+│ yes     │ '.5e3'      │
+│ yes     │ '.5E-3'     │
+│ yes     │ '5.'        │
+│         │ .           │
+│         │ -.          │
+│         │ .e5         │
+│         │ .5.5        │
+│         │ .5x         │
+│         │ .5e         │
+│ yes     │ '0x1F'      │
+│ yes     │ '0X1f'      │
+│ yes     │ '-0x10'     │
+│ yes     │ '+0xabcdef' │
+│         │ 0x          │
+│         │ 0x1G        │
+│         │ 0x1.5       │
+│         │ x10         │
+│         │ 1x10        │
+╰─────────┴─────────────╯
+END