Improved interface to double-quoted string literal enabling/disabling.

FossilOrigin-Name: 923cfd53fcff2fcb91530bf819d2ecb0eda3f6a27dae29c7460f9ce3a3ffce7b

manifest

@@ -1,5 +1,5 @@
-C Add\sSQLITE_DBCONFIG\soptions\sLEGACY_ALTER_TABLE,\sNO_DQS_SCHEMA,\sand\sNO_DQS.
-D 2019-06-14T21:25:25.591
+C Improved\sinterface\sto\sdouble-quoted\sstring\sliteral\senabling/disabling.
+D 2019-06-17T13:56:11.777
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -486,7 +486,7 @@ F src/in-operator.md 10cd8f4bcd225a32518407c2fb2484089112fd71
 F src/insert.c f20925c2c08144442dabeb73dcd0f5026f5f085d827f3d5635f7c45e5d195320
 F src/legacy.c d7874bc885906868cd51e6c2156698f2754f02d9eee1bae2d687323c3ca8e5aa
 F src/loadext.c 22afc33c3a61b4fd80a60a54f1882688371e6bc64685df2696b008fce65a999c
-F src/main.c a511e378ab8e839f77e041347fe045194b9f4b2203050c6dbfdb75902ff628c2
+F src/main.c e16c702032930fd9d8c0533fed7575f3900022c13a59cc2817e60f07096a005e
 F src/malloc.c 0f9da2a66b230a5785af94b9672126845099b57b70a32c987d04ac28c69da990
 F src/mem0.c 6a55ebe57c46ca1a7d98da93aaa07f99f1059645
 F src/mem1.c c12a42539b1ba105e3707d0e628ad70e611040d8f5e38cf942cee30c867083de
@@ -520,19 +520,19 @@ F src/pragma.h 4a9fabff14db4487a734dfeeb4be984ce662bfdccfae16145b9c732327735e13
 F src/prepare.c 78027c6231fbb19ca186a5f5f0c0a1375d9c2cec0655273f9bd90d9ff74a34b3
 F src/printf.c 9be6945837c839ba57837b4bc3af349eba630920fa5532aa518816defe42a7d4
 F src/random.c 80f5d666f23feb3e6665a6ce04c7197212a88384
-F src/resolve.c 8fd2fca510e8ae7457f37f294809900d232a2e5c121943bb9e52068ae885a644
+F src/resolve.c 93b7bc7c45efa6322d92293361c51a873690daed50cf77eeff88a448246b0d5a
 F src/rowset.c d977b011993aaea002cab3e0bb2ce50cf346000dff94e944d547b989f4b1fe93
 F src/select.c 9187f2c65744e975b191ccee49946732ee922f8bf40da998b322aca1633405ea
-F src/shell.c.in 21e30c2cf16aa873c9ce2cd6ca1c8933c830e69b73c1e74f4fdffbda80e9c356
-F src/sqlite.h.in e9a463ea16100b54f02b4063dc96a0add392c4a92963c50bfd6eb0324e118f3b
+F src/shell.c.in 6edadde44b5b084cb0091340e73061e47c65a40c531befd7566fbfe64cfa85fc
+F src/sqlite.h.in bc4aa09a59dcf3c34b8e57ce9ade8ff6aed8ef7a7ddc59951f59f9b009fc7cc0
 F src/sqlite3.rc 5121c9e10c3964d5755191c80dd1180c122fc3a8
 F src/sqlite3ext.h 9ecc93b8493bd20c0c07d52e2ac0ed8bab9b549c7f7955b59869597b650dd8b5
-F src/sqliteInt.h 377ffa32933137d5ce140713315df34263ddf2f68150a63fce51e4cd52ed0194
+F src/sqliteInt.h bf65dfa6565fae2e0d501088fc9c5212244adc1429a543827a16b2f5eaf41982
 F src/sqliteLimit.h 1513bfb7b20378aa0041e7022d04acb73525de35b80b252f1b83fedb4de6a76b
 F src/status.c 46e7aec11f79dad50965a5ca5fa9de009f7d6bde08be2156f1538a0a296d4d0e
 F src/table.c b46ad567748f24a326d9de40e5b9659f96ffff34
 F src/tclsqlite.c cfe7f93daf9d8787f65e099efb67d7cdfc2c35236dec5d3f6758520bd3519424
-F src/test1.c 15752c6299f43e3e96004516d6a4895cc02fce6cb6da71dd4eeeeb922b8e10fb
+F src/test1.c f57c229ad7878215d0b3bb5d59ffe94772c099ce5b5e147a4a59d3157923a988
 F src/test2.c 3efb99ab7f1fc8d154933e02ae1378bac9637da5
 F src/test3.c 61798bb0d38b915067a8c8e03f5a534b431181f802659a6616f9b4ff7d872644
 F src/test4.c 405834f6a93ec395cc4c9bb8ecebf7c3d8079e7ca16ae65e82d01afd229694bb
@@ -1830,10 +1830,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 23e49f9984f74f242602c6e56bfc645585c7c86bcdd585c322ab0d8e20958d86
-R 9bfbb0e600d24d42989c08db0f349d57
-T *branch * new-dbconfig-options
-T *sym-new-dbconfig-options *
-T -sym-trunk *
+P 1fad20925efa70d0c242e9cba8fa55456fb07a81229c1068da84c6e27d0c0be8
+R 10b2e303dd1c5747406e48e4085cd8f9
 U drh
-Z 30e1c14e70d492d05922ad996c549711
+Z 5e32c45febb886d78a377b0ce6c28269

manifest.uuid

@@ -1 +1 @@
-1fad20925efa70d0c242e9cba8fa55456fb07a81229c1068da84c6e27d0c0be8
+923cfd53fcff2fcb91530bf819d2ecb0eda3f6a27dae29c7460f9ce3a3ffce7b

src/main.c

@@ -846,8 +846,8 @@ int sqlite3_db_config(sqlite3 *db, int op, ...){
         { SQLITE_DBCONFIG_WRITABLE_SCHEMA,       SQLITE_WriteSchema|
                                                  SQLITE_NoSchemaError  },
         { SQLITE_DBCONFIG_LEGACY_ALTER_TABLE,    SQLITE_LegacyAlter    },
-        { SQLITE_DBCONFIG_NO_DQS_SCHEMA,         SQLITE_NoDQSSchema    },
-        { SQLITE_DBCONFIG_NO_DQS,                SQLITE_NoDQS          },
+        { SQLITE_DBCONFIG_DQS_DDL,               SQLITE_DqsDDL         },
+        { SQLITE_DBCONFIG_DQS_DML,               SQLITE_DqsDML         },
       };
       unsigned int i;
       rc = SQLITE_ERROR; /* IMP: R-42790-23372 */
@@ -3074,7 +3074,7 @@ static int openDatabase(
   db->nextPagesize = 0;
   db->nMaxSorterMmap = 0x7FFFFFFF;
   db->flags |= SQLITE_ShortColNames | SQLITE_EnableTrigger | SQLITE_CacheSpill
-                 | SQLITE_NoDQSSchema
+                 | SQLITE_DqsDML
 #if !defined(SQLITE_DEFAULT_AUTOMATIC_INDEX) || SQLITE_DEFAULT_AUTOMATIC_INDEX
                  | SQLITE_AutoIndex
 #endif

src/resolve.c

@@ -148,6 +148,23 @@ int sqlite3MatchSpanName(
   return 1;
 }
 
+/*
+** Return TRUE if the double-quoted string  mis-feature should be supported.
+*/
+static int areDoubleQuotedStringsEnabled(sqlite3 *db, NameContext *pTopNC){
+  if( db->init.busy ) return 1;  /* Always support for legacy schemas */
+  if( pTopNC->ncFlags & NC_IsDDL ){
+    /* Currently parsing a DDL statement */
+    if( sqlite3WritableSchema(db) && (db->flags & SQLITE_DqsDML)!=0 ){
+      return 1;
+    }
+    return (db->flags & SQLITE_DqsDDL)!=0;
+  }else{
+    /* Currently parsing a DML statement */
+    return (db->flags & SQLITE_DqsDML)!=0;
+  }
+}
+
 /*
 ** Given the name of a column of the form X.Y.Z or Y.Z or just Z, look up
 ** that name in the set of source tables in pSrcList and make the pExpr 
@@ -476,9 +493,8 @@ static int lookupName(
   */
   if( cnt==0 && zTab==0 ){
     assert( pExpr->op==TK_ID );
-    if( ExprHasProperty(pExpr,EP_DblQuoted) 
-     && 0==(pTopNC->ncFlags&NC_NoDblQStr)
-     && 0==(db->flags & SQLITE_NoDQS)
+    if( ExprHasProperty(pExpr,EP_DblQuoted)
+     && areDoubleQuotedStringsEnabled(db, pTopNC)
     ){
       /* If a double-quoted identifier does not match any known column name,
       ** then treat it as a string.
@@ -1771,15 +1787,7 @@ int sqlite3ResolveSelfReference(
   }
   sNC.pParse = pParse;
   sNC.pSrcList = &sSrc;
-  sNC.ncFlags = type;
-  if( (pParse->db->flags & SQLITE_NoDQS)!=0
-   || (!pParse->db->init.busy
-        && !sqlite3WritableSchema(pParse->db)
-        && (pParse->db->flags & SQLITE_NoDQSSchema)!=0
-      )
-  ){
-    sNC.ncFlags |= NC_NoDblQStr;
-  }
+  sNC.ncFlags = type | NC_IsDDL;
   if( (rc = sqlite3ResolveExprNames(&sNC, pExpr))!=SQLITE_OK ) return rc;
   if( pList ) rc = sqlite3ResolveExprListNames(&sNC, pList);
   return rc;

src/shell.c.in

@@ -7086,8 +7086,8 @@ static int do_meta_command(char *zLine, ShellState *p){
         { "defensive",          SQLITE_DBCONFIG_DEFENSIVE             },
         { "wriable_schema",     SQLITE_DBCONFIG_WRITABLE_SCHEMA       },
         { "legacy_alter_table", SQLITE_DBCONFIG_LEGACY_ALTER_TABLE    },
-        { "no_dqs_schema",      SQLITE_DBCONFIG_NO_DQS_SCHEMA         },
-        { "no_dqs",             SQLITE_DBCONFIG_NO_DQS                },
+        { "dqs_dml",            SQLITE_DBCONFIG_DQS_DML               },
+        { "dqs_ddl",            SQLITE_DBCONFIG_DQS_DDL               },
     };
     int ii, v;
     open_db(p, 0);

src/sqlite.h.in

@@ -2231,19 +2231,18 @@ struct sqlite3_mem_methods {
 ** using the [PRAGMA legacy_alter_table] statement.
 ** </dd>
 **
-** [[SQLITE_DBCONFIG_NO_DQS_SCHEMA]]
-** <dt>SQLITE_DBCONFIG_NO_DQS_SCHEMA</td>
-** <dd>The SQLITE_DBCONFIG_NO_DQS_SCHEMA option activates or deactivates
-** the legacy [double-quoted string literal] misfeature for DDL statements.
+** [[SQLITE_DBCONFIG_DQS_DML]]
+** <dt>SQLITE_DBCONFIG_DQS_DML</td>
+** <dd>The SQLITE_DBCONFIG_DQS_DML option activates or deactivates
+** the legacy [double-quoted string literal] misfeature for DML statement
+** only, that is DELETE, INSERT, SELECT, and UPDATE statements.
 ** </dd>
 **
-** [[SQLITE_DBCONFIG_NO_DQS]]
-** <dt>SQLITE_DBCONFIG_NO_DQS</td>
-** <dd>The SQLITE_DBCONFIG_NO_DQS option activates or deactivates
-** the legacy [double-quoted string literal] misfeature.  The
-** double-quoted string literal misfeature is on by default for
-** compatibility, though it might become off by default in some
-** future release of SQLite.
+** [[SQLITE_DBCONFIG_DQS_DDL]]
+** <dt>SQLITE_DBCONFIG_DQS_DDL</td>
+** <dd>The SQLITE_DBCONFIG_DQS option activates or deactivates
+** the legacy [double-quoted string literal] misfeature for DDL statements,
+** such as CREATE TABLE and CREATE INDEX.
 ** </dd>
 ** </dl>
 */
@@ -2260,8 +2259,8 @@ struct sqlite3_mem_methods {
 #define SQLITE_DBCONFIG_DEFENSIVE             1010 /* int int* */
 #define SQLITE_DBCONFIG_WRITABLE_SCHEMA       1011 /* int int* */
 #define SQLITE_DBCONFIG_LEGACY_ALTER_TABLE    1012 /* int int* */
-#define SQLITE_DBCONFIG_NO_DQS_SCHEMA         1013 /* int int* */
-#define SQLITE_DBCONFIG_NO_DQS                1014 /* int int* */
+#define SQLITE_DBCONFIG_DQS_DML               1013 /* int int* */
+#define SQLITE_DBCONFIG_DQS_DDL               1014 /* int int* */
 #define SQLITE_DBCONFIG_MAX                   1014 /* Largest DBCONFIG */
 
 /*

src/sqliteInt.h

@@ -1548,8 +1548,8 @@ struct sqlite3 {
 #define SQLITE_LegacyAlter    0x04000000  /* Legacy ALTER TABLE behaviour */
 #define SQLITE_NoSchemaError  0x08000000  /* Do not report schema parse errors*/
 #define SQLITE_Defensive      0x10000000  /* Input SQL is likely hostile */
-#define SQLITE_NoDQSSchema    0x20000000  /* No dbl-quote strings in CREATE */
-#define SQLITE_NoDQS          0x40000000  /* No double-quoted strings anywhere*/
+#define SQLITE_DqsDDL         0x20000000  /* dbl-quoted strings allowed in DDL*/
+#define SQLITE_DqsDML         0x40000000  /* dbl-quoted strings allowed in DML*/
 
 /* Flags used only if debugging */
 #define HI(X)  ((u64)(X)<<32)
@@ -2796,8 +2796,7 @@ struct NameContext {
 #define NC_Complex   0x2000  /* True if a function or subquery seen */
 #define NC_AllowWin  0x4000  /* Window functions are allowed here */
 #define NC_HasWin    0x8000  /* One or more window functions seen */
-#define NC_NoDblQStr 0x10000 /* Do not allow double-quoted string hack.
-                             ** Mnemonic: "NO DouBLe-Quoted STRings" */
+#define NC_IsDDL    0x10000  /* Resolving names in a CREATE statement */
 
 /*
 ** An instance of the following object describes a single ON CONFLICT

src/test1.c

@@ -7619,8 +7619,8 @@ static int SQLITE_TCLAPI test_sqlite3_db_config(
     { "DEFENSIVE",          SQLITE_DBCONFIG_DEFENSIVE },
     { "WRITABLE_SCHEMA",    SQLITE_DBCONFIG_WRITABLE_SCHEMA },
     { "LEGACY_ALTER_TABLE", SQLITE_DBCONFIG_LEGACY_ALTER_TABLE },
-    { "NO_DQS_SCHEMA",      SQLITE_DBCONFIG_NO_DQS_SCHEMA },
-    { "NO_DQS",             SQLITE_DBCONFIG_NO_DQS },
+    { "DQS_DML",            SQLITE_DBCONFIG_DQS_DML },
+    { "DQS_DDL",            SQLITE_DBCONFIG_DQS_DDL },
   };
   int i;
   int v;