Add the built-in affinity() SQL function. This turns out to be not as useful

as originally envisioned, so abandon it on a branch.

FossilOrigin-Name: 80889306bf57b886a248b880bc90197b8975a666

manifest

@@ -1,5 +1,5 @@
-C Rename\sSQLITE_AFF_NONE\sto\sSQLITE_AFF_BLOB.
-D 2015-06-02T15:32:08.579
+C Add\sthe\sbuilt-in\saffinity()\sSQL\sfunction.\s\sThis\sturns\sout\sto\sbe\snot\sas\suseful\nas\soriginally\senvisioned,\sso\sabandon\sit\son\sa\sbranch.
+D 2015-06-02T16:09:58.099
 F Makefile.arm-wince-mingw32ce-gcc d6df77f1f48d690bd73162294bbba7f59507c72f
 F Makefile.in 994bab32a3a69e0c35bd148b65cde49879772964
 F Makefile.linux-gcc 91d710bdc4998cb015f39edf3cb314ec4f4d7e23
@@ -202,10 +202,10 @@ F src/ctime.c 5a0b735dc95604766f5dac73973658eef782ee8b
 F src/date.c e4d50b3283696836ec1036b695ead9a19e37a5ac
 F src/dbstat.c f402e77e25089c6003d0c60b3233b9b3947d599a
 F src/delete.c 37964e6c1d73ff49cbea9ff690c9605fb15f600e
-F src/expr.c 52f5c1c2c16bf47234dc276d9f72b5ea85ae14af
+F src/expr.c 5abe19af1c41dd8b334318611c6614cc21155b88
 F src/fault.c 160a0c015b6c2629d3899ed2daf63d75754a32bb
 F src/fkey.c c9b63a217d86582c22121699a47f22f524608869
-F src/func.c 5b8b8e77a0fb644eaf8947d413804622e32692b6
+F src/func.c c215efa308b831f7ea147c7a6a03080c870caf8a
 F src/global.c 4f77cadbc5427d00139ba43d0f3979804cbb700e
 F src/hash.c 4263fbc955f26c2e8cdc0cf214bc42435aa4e4f5
 F src/hash.h c8f3c31722cf3277d03713909761e152a5b81094
@@ -255,7 +255,7 @@ F src/shell.c 07dda7cd692911d2f22269953418d049f2e2c0ee
 F src/sqlite.h.in d165beeceb6b40af60f352a4d4e37e02d9af7df0
 F src/sqlite3.rc 992c9f5fb8285ae285d6be28240a7e8d3a7f2bad
 F src/sqlite3ext.h 2ebeb634e751a61a6f0eebfa0f4669f46a42f6cd
-F src/sqliteInt.h bcf51f6ec3ad67dbdf1acf78fcb94884af93c183
+F src/sqliteInt.h 98c49cbd565f08f2e516399734e497340ca9549c
 F src/sqliteLimit.h 216557999cb45f2e3578ed53ebefe228d779cb46
 F src/status.c f266ad8a2892d659b74f0f50cb6a88b6e7c12179
 F src/table.c 51b46b2a62d1b3a959633d593b89bab5e2c9155e
@@ -329,6 +329,7 @@ F src/walker.c c253b95b4ee44b21c406e2a1052636c31ea27804
 F src/where.c dcdfee81d35ae9261a4c5bda6289ed5fa6d7e1ae
 F src/whereInt.h a6f5a762bc1b4b1c76e1cea79976b437ac35a435
 F test/8_3_names.test ebbb5cd36741350040fd28b432ceadf495be25b2
+F test/affinity1.test 3f68d94550f47bac467f916844d939c94882b557
 F test/aggerror.test a867e273ef9e3d7919f03ef4f0e8c0d2767944f2
 F test/aggnested.test b35b4cd69fc913f90d39a575e171e1116c3a4bb7
 F test/alias.test 4529fbc152f190268a15f9384a5651bbbabc9d87
@@ -1281,10 +1282,10 @@ F tool/vdbe_profile.tcl 67746953071a9f8f2f668b73fe899074e2c6d8c1
 F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
 F tool/warnings.sh 0abfd78ceb09b7f7c27c688c8e3fe93268a13b32
 F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
-P 4e621af1345a001360938de76e3b0a14deb5e991
-R ee13a8dd8e0014c6c36d8309e414bd72
-T *branch * blob-affinity-rename
-T *sym-blob-affinity-rename *
-T -sym-trunk *
+P bce3f04186cd2d69414a5a98b5b77dc8f060554a
+R 98be638f0f819b9a8a15b45777fdc534
+T *branch * affinity-func
+T *sym-affinity-func *
+T -sym-blob-affinity-rename *
 U drh
-Z 3dc5f9f8176f1194f0510f7321cda212
+Z 13640b2e248aab3cf67f2fff3528da6a

manifest.uuid

@@ -1 +1 @@
-bce3f04186cd2d69414a5a98b5b77dc8f060554a
+80889306bf57b886a248b880bc90197b8975a666

src/expr.c

@@ -2874,6 +2874,22 @@ int sqlite3ExprCodeTarget(Parse *pParse, Expr *pExpr, int target){
         break;
       }
 
+      /* The AFFINITY() function returns the type affinity of its argument.
+      ** The type affinity is a compile-time value, so we might as well
+      ** code it directly.
+      */
+      if( pDef->funcFlags & SQLITE_FUNC_AFFINITY ){
+        int aff;
+        static const char *const azAffName[] = {
+           "", "BLOB", "TEXT", "NUMERIC", "INTEGER", "REAL"
+        };
+        assert( nFarg==1 );
+        aff = sqlite3ExprAffinity(pFarg->a[0].pExpr);
+        if( aff ) aff -= SQLITE_AFF_BLOB - 1;
+        sqlite3VdbeAddOp4(v, OP_String8, 0, target, 0, azAffName[aff], 0);
+        break;
+      }
+
       for(i=0; i<nFarg; i++){
         if( i<32 && sqlite3ExprIsConstant(pFarg->a[i].pExpr) ){
           testcase( i==31 );

src/func.c

@@ -1717,6 +1717,7 @@ void sqlite3RegisterGlobalFunctions(void){
     AGGREGATE2(max,              1, 1, 1, minmaxStep,      minMaxFinalize,
                                           SQLITE_FUNC_MINMAX ),
     FUNCTION2(typeof,            1, 0, 0, typeofFunc,  SQLITE_FUNC_TYPEOF),
+    FUNCTION2(affinity,          1, 0, 0, noopFunc,    SQLITE_FUNC_AFFINITY),
     FUNCTION2(length,            1, 0, 0, lengthFunc,  SQLITE_FUNC_LENGTH),
     FUNCTION(instr,              2, 0, 0, instrFunc        ),
     FUNCTION(substr,             2, 0, 0, substrFunc       ),

src/sqliteInt.h

@@ -1348,18 +1348,19 @@ struct FuncDestructor {
 ** values must correspond to OPFLAG_LENGTHARG and OPFLAG_TYPEOFARG.  There
 ** are assert() statements in the code to verify this.
 */
-#define SQLITE_FUNC_ENCMASK  0x003 /* SQLITE_UTF8, SQLITE_UTF16BE or UTF16LE */
-#define SQLITE_FUNC_LIKE     0x004 /* Candidate for the LIKE optimization */
-#define SQLITE_FUNC_CASE     0x008 /* Case-sensitive LIKE-type function */
-#define SQLITE_FUNC_EPHEM    0x010 /* Ephemeral.  Delete with VDBE */
-#define SQLITE_FUNC_NEEDCOLL 0x020 /* sqlite3GetFuncCollSeq() might be called */
-#define SQLITE_FUNC_LENGTH   0x040 /* Built-in length() function */
-#define SQLITE_FUNC_TYPEOF   0x080 /* Built-in typeof() function */
-#define SQLITE_FUNC_COUNT    0x100 /* Built-in count(*) aggregate */
-#define SQLITE_FUNC_COALESCE 0x200 /* Built-in coalesce() or ifnull() */
-#define SQLITE_FUNC_UNLIKELY 0x400 /* Built-in unlikely() function */
-#define SQLITE_FUNC_CONSTANT 0x800 /* Constant inputs give a constant output */
-#define SQLITE_FUNC_MINMAX  0x1000 /* True for min() and max() aggregates */
+#define SQLITE_FUNC_ENCMASK  0x0003 /* SQLITE_UTF8, SQLITE_UTF16BE or UTF16LE */
+#define SQLITE_FUNC_LIKE     0x0004 /* Candidate for the LIKE optimization */
+#define SQLITE_FUNC_CASE     0x0008 /* Case-sensitive LIKE-type function */
+#define SQLITE_FUNC_EPHEM    0x0010 /* Ephemeral.  Delete with VDBE */
+#define SQLITE_FUNC_NEEDCOLL 0x0020 /* sqlite3GetFuncCollSeq might be called */
+#define SQLITE_FUNC_LENGTH   0x0040 /* Built-in length() function */
+#define SQLITE_FUNC_TYPEOF   0x0080 /* Built-in typeof() function */
+#define SQLITE_FUNC_COUNT    0x0100 /* Built-in count(*) aggregate */
+#define SQLITE_FUNC_COALESCE 0x0200 /* Built-in coalesce() or ifnull() */
+#define SQLITE_FUNC_UNLIKELY 0x0400 /* Built-in unlikely() function */
+#define SQLITE_FUNC_CONSTANT 0x0800 /* Constant inputs give a constant output */
+#define SQLITE_FUNC_MINMAX   0x1000 /* True for min() and max() aggregates */
+#define SQLITE_FUNC_AFFINITY 0x2000 /* Built-in affinity() function */
 
 /*
 ** The following three macros, FUNCTION(), LIKEFUNC() and AGGREGATE() are

test/affinity1.test

@@ -0,0 +1,88 @@
+# 2015-06-02
+#
+# The author disclaims copyright to this source code.  In place of
+# a legal notice, here is a blessing:
+#
+#    May you do good and not evil.
+#    May you find forgiveness for yourself and forgive others.
+#    May you share freely, never taking more than you give.
+#
+#***********************************************************************
+# This file implements regression tests for SQLite library.  The
+# focus of this file is type affinity and the affinity() built-in
+# function.
+#
+
+set testdir [file dirname $argv0]
+source $testdir/tester.tcl
+set ::testprefix affinity1
+
+do_execsql_test 100 {
+  CREATE TABLE t1(
+    c01 INT,
+    c02 INTEGER,
+    c03 TINYINT,
+    c04 SMALLINT,
+    c05 MEDIUMINT, 
+    c06 BIGINT,
+    c07 UNSIGNED BIG INT,
+    c08 INT2,
+    c09 INT4,
+    c10 CHARACTER(20),
+    c11 VARCHAR(255),
+    c12 VARYING CHARACTER(255),
+    c13 NCHAR(55),
+    c14 NATIVE CHARACTER(70),
+    c15 NVARCHAR(100),
+    c16 TEXT,
+    c17 CLOB,
+    c20 BLOB,
+    c21,
+    c30 REAL,
+    c31 DOUBLE,
+    c32 DOUBLE PRECISION,
+    c33 FLOAT,
+    c40 NUMERIC,
+    c41 DECIMAL(10,5),
+    c42 BOOLEAN,
+    c43 DATE,
+    c44 DATETIME,
+    c50 FLOATING POINT,
+    c60 STRING
+  );
+  INSERT INTO t1 DEFAULT VALUES;
+} {}
+do_execsql_test 201 {
+  SELECT affinity(c01), affinity(c01+1), affinity(+c01) FROM t1;
+} {INTEGER {} {}}
+do_execsql_test 202 {SELECT affinity(c02) FROM t1} {INTEGER}
+do_execsql_test 203 {SELECT affinity(c03) FROM t1} {INTEGER}
+do_execsql_test 204 {SELECT affinity(c04) FROM t1} {INTEGER}
+do_execsql_test 205 {SELECT affinity(c05) FROM t1} {INTEGER}
+do_execsql_test 206 {SELECT affinity(c06) FROM t1} {INTEGER}
+do_execsql_test 207 {SELECT affinity(c07) FROM t1} {INTEGER}
+do_execsql_test 208 {SELECT affinity(c08) FROM t1} {INTEGER}
+do_execsql_test 209 {SELECT affinity(c09) FROM t1} {INTEGER}
+do_execsql_test 210 {SELECT affinity(c10) FROM t1} {TEXT}
+do_execsql_test 211 {SELECT affinity(c11) FROM t1} {TEXT}
+do_execsql_test 212 {SELECT affinity(c12) FROM t1} {TEXT}
+do_execsql_test 213 {SELECT affinity(c13) FROM t1} {TEXT}
+do_execsql_test 214 {SELECT affinity(c14) FROM t1} {TEXT}
+do_execsql_test 215 {SELECT affinity(c15) FROM t1} {TEXT}
+do_execsql_test 216 {SELECT affinity(c16) FROM t1} {TEXT}
+do_execsql_test 220 {SELECT affinity(c20) FROM t1} {BLOB}
+do_execsql_test 221 {SELECT affinity(c21) FROM t1} {BLOB}
+do_execsql_test 230 {SELECT affinity(c30) FROM t1} {REAL}
+do_execsql_test 231 {SELECT affinity(c31) FROM t1} {REAL}
+do_execsql_test 232 {SELECT affinity(c32) FROM t1} {REAL}
+do_execsql_test 233 {SELECT affinity(c33) FROM t1} {REAL}
+do_execsql_test 240 {SELECT affinity(c40) FROM t1} {NUMERIC}
+do_execsql_test 241 {SELECT affinity(c41) FROM t1} {NUMERIC}
+do_execsql_test 242 {SELECT affinity(c42) FROM t1} {NUMERIC}
+do_execsql_test 243 {SELECT affinity(c43) FROM t1} {NUMERIC}
+do_execsql_test 244 {SELECT affinity(c44) FROM t1} {NUMERIC}
+do_execsql_test 250 {SELECT affinity(c50) FROM t1} {INTEGER}
+do_execsql_test 260 {SELECT affinity(c60) FROM t1} {NUMERIC}
+
+
+finish_test