From: drh <>
Date: Mon, 29 Nov 2021 17:23:27 +0000 (+0000)
Subject: Add the unixepoch() function and the 'auto' and 'julianday' modifiers.
X-Git-Tag: version-3.38.0~214^2
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=refs%2Fheads%2Funixepoch;p=thirdparty%2Fsqlite.git

Add the unixepoch() function and the 'auto' and 'julianday' modifiers.

FossilOrigin-Name: 559fdc0aa76f4c207f99f7b0cee42043b402dc388165817529d9963b115a798c
---

diff --git a/manifest b/manifest
index 262f1306c1..cd9aab656c 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Following\sa\sprior\serror,\san\sALWAYS()\sin\ssqlite3ExprCanBeNull()\smight\sbe\sfalse.\ndbsqlfuzz\s5dbec6678a20e7595a34dfdd869a3b9722b3ca43.
-D 2021-11-28T19:54:38.307
+C Add\sthe\sunixepoch()\sfunction\sand\sthe\s'auto'\sand\s'julianday'\smodifiers.
+D 2021-11-29T17:23:27.456
 F .fossil-settings/empty-dirs dbb81e8fc0401ac46a1491ab34a7f2c7c0452f2f06b54ebb845d024ca8283ef1
 F .fossil-settings/ignore-glob 35175cdfcf539b2318cb04a9901442804be81cd677d8b889fcc9149c21f239ea
 F LICENSE.md df5091916dbb40e6e9686186587125e1b2ff51f022cc334e886c19a0e9982724
@@ -498,7 +498,7 @@ F src/build.c c46bd4f5a69f398410c4472f7c1c4291fb8078d2c9758a2dad5916edd1d30ecc
 F src/callback.c 106b585da1edd57d75fa579d823a5218e0bf37f191dbf7417eeb4a8a9a267dbc
 F src/complete.c a3634ab1e687055cd002e11b8f43eb75c17da23e
 F src/ctime.c 8159d5f706551861c18ec6c8f6bdf105e15ea00367f05d9ab65d31a1077facc1
-F src/date.c fa928630fecf1d436cdc7a7a5c950c781709023ca782c21b7a43cc7361a9451e
+F src/date.c d0f09f7924a27e0d8a41b41a781ccc680b102c35b5e9a94d129d58ba9d849ff2
 F src/dbpage.c 8a01e865bf8bc6d7b1844b4314443a6436c07c3efe1d488ed89e81719047833a
 F src/dbstat.c 861e08690fcb0f2ee1165eff0060ea8d4f3e2ea10f80dab7d32ad70443a6ff2d
 F src/delete.c 0c151975fa99560767d7747f9b60543d0093d9f8b89f13d2d6058e9c83ad19e7
@@ -1933,7 +1933,10 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P bd41822c7424d393a30e92ff6cb254d25c26769889c1499a18a0b9339f5d6c8a
-R ee6ac26534b5f5e3f1e9b2504f0fbd97
+P 4e207401acce1bdc17025f2d55bd94234b435e286cd43e1eda03b6949a2a91d3
+R b11e280e59fe4b6e2248a7ea61ef7371
+T *branch * unixepoch
+T *sym-unixepoch *
+T -sym-trunk *
 U drh
-Z 9896c4e7bad9bcf4c4f3ad7c3deddb22
+Z 331f65dd5ca8ead7ee1403436d508d31
diff --git a/manifest.uuid b/manifest.uuid
index 5374c9a521..7cf507461c 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-4e207401acce1bdc17025f2d55bd94234b435e286cd43e1eda03b6949a2a91d3
\ No newline at end of file
+559fdc0aa76f4c207f99f7b0cee42043b402dc388165817529d9963b115a798c
\ No newline at end of file
diff --git a/src/date.c b/src/date.c
index 20a0a5d175..dcec9c7cc1 100644
--- a/src/date.c
+++ b/src/date.c
@@ -662,6 +662,45 @@ static int parseModifier(
   int rc = 1;
   double r;
   switch(sqlite3UpperToLower[(u8)z[0]] ){
+    case 'a': {
+      /*
+      **    auto
+      **
+      ** If rawS is available, then interpret as a julian day number, or
+      ** a unix timestamp, depending on its magnitude.
+      */
+      if( sqlite3_stricmp(z, "auto")==0 ){
+        if( !p->rawS || p->validJD ){
+          rc = 0;
+          p->rawS = 0;
+        }else if( p->s>=-210866760000 && p->s<=253402300799 ){
+          r = p->s*1000.0 + 210866760000000.0;
+          clearYMD_HMS_TZ(p);
+          p->iJD = (sqlite3_int64)(r + 0.5);
+          p->validJD = 1;
+          p->rawS = 0;
+          rc = 0;
+        }
+      }
+      break;
+    }
+    case 'j': {
+      /*
+      **    julianday
+      **
+      ** Always interpret the prior number as a julian-day value.  If this
+      ** is not the first modifier, or if the prior argument is not a numeric
+      ** value in the allowed range of julian day numbers understood by
+      ** SQLite (0..5373484.5) then the result will be NULL.
+      */
+      if( sqlite3_stricmp(z, "julianday")==0 ){
+        if( p->validJD && p->rawS ){
+          rc = 0;
+          p->rawS = 0;
+        }
+      }
+      break;
+    }
 #ifndef SQLITE_OMIT_LOCALTIME
     case 'l': {
       /*    localtime
@@ -926,6 +965,24 @@ static void juliandayFunc(
   }
 }
 
+/*
+**    unixepoch( TIMESTRING, MOD, MOD, ...)
+**
+** Return the number of seconds (including fractional seconds) since
+** the unix epoch of 1970-01-01 00:00:00 GMT.
+*/
+static void unixepochFunc(
+  sqlite3_context *context,
+  int argc,
+  sqlite3_value **argv
+){
+  DateTime x;
+  if( isDate(context, argc, argv, &x)==0 ){
+    computeJD(&x);
+    sqlite3_result_int64(context, x.iJD/1000 - 21086676*(i64)10000);
+  }
+}
+
 /*
 **    datetime( TIMESTRING, MOD, MOD, ...)
 **
@@ -1202,6 +1259,7 @@ void sqlite3RegisterDateTimeFunctions(void){
   static FuncDef aDateTimeFuncs[] = {
 #ifndef SQLITE_OMIT_DATETIME_FUNCS
     PURE_DATE(julianday,        -1, 0, 0, juliandayFunc ),
+    PURE_DATE(unixepoch,        -1, 0, 0, unixepochFunc ),
     PURE_DATE(date,             -1, 0, 0, dateFunc      ),
     PURE_DATE(time,             -1, 0, 0, timeFunc      ),
     PURE_DATE(datetime,         -1, 0, 0, datetimeFunc  ),