[sql] Import SQLite 3.17.0.

third_party/sqlite/src/ext/session/session_speed_test.c

Index: third_party/sqlite/src/ext/session/session_speed_test.c
diff --git a/third_party/sqlite/src/ext/session/session_speed_test.c b/third_party/sqlite/src/ext/session/session_speed_test.c
new file mode 100644
index 0000000000000000000000000000000000000000..14b97ea07b6873b943bd75a0f61f22be27aa2a5d
--- /dev/null
+++ b/third_party/sqlite/src/ext/session/session_speed_test.c
@@ -0,0 +1,360 @@
+/*
+** 2017 January 31
+**
+** 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 contains the source code for a standalone program used to
+** test the performance of the sessions module. Compile and run:
+**
+**   ./session_speed_test -help
+**
+** for details.
+*/
+
+#include "sqlite3.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stddef.h>
+#include <unistd.h>
+
+/*************************************************************************
+** Start of generic command line parser.
+*/
+#define CMDLINE_BARE       0
+#define CMDLINE_INTEGER    1
+#define CMDLINE_STRING     2
+#define CMDLINE_BOOLEAN    3
+
+typedef struct CmdLineOption CmdLineOption;
+struct CmdLineOption {
+  const char *zText;              /* Name of command line option */
+  const char *zHelp;              /* Help text for option */
+  int eType;                      /* One of the CMDLINE_* values */
+  int iOff;                       /* Offset of output variable */
+};
+
+#define CMDLINE_INT32(x,y,z) {x, y, CMDLINE_INTEGER, z}
+#define CMDLINE_BOOL(x,y,z)  {x, y, CMDLINE_BOOLEAN, z}
+#define CMDLINE_TEXT(x,y,z)  {x, y, CMDLINE_STRING, z}
+#define CMDLINE_NONE(x,y,z)  {x, y, CMDLINE_BARE, z}
+
+static void option_requires_argument_error(CmdLineOption *pOpt){
+  fprintf(stderr, "Option requires a%s argument: %s\n", 
+      pOpt->eType==CMDLINE_INTEGER ? "n integer" :
+      pOpt->eType==CMDLINE_STRING ? " string" : " boolean",
+      pOpt->zText
+  );
+  exit(1);
+}
+
+static void ambiguous_option_error(const char *zArg){
+  fprintf(stderr, "Option is ambiguous: %s\n", zArg);
+  exit(1);
+}
+
+static void unknown_option_error(
+  const char *zArg, 
+  CmdLineOption *aOpt,
+  const char *zHelp
+){
+  int i;
+  fprintf(stderr, "Unknown option: %s\n", zArg);
+  fprintf(stderr, "\nOptions are:\n");
+  fprintf(stderr, "  % -30sEcho command line options\n", "-cmdline:verbose");
+  for(i=0; aOpt[i].zText; i++){
+    int eType = aOpt[i].eType;
+    char *zOpt = sqlite3_mprintf("%s %s", aOpt[i].zText,
+        eType==CMDLINE_BARE ? "" :
+        eType==CMDLINE_INTEGER ? "N" :
+        eType==CMDLINE_BOOLEAN ? "BOOLEAN" : "TEXT"
+    );
+    fprintf(stderr, "  % -30s%s\n", zOpt, aOpt[i].zHelp);
+    sqlite3_free(zOpt);
+  }
+  if( zHelp ){
+    fprintf(stderr, "\n%s\n", zHelp);
+  }
+  exit(1);
+}
+
+static int get_integer_option(CmdLineOption *pOpt, const char *zArg){
+  int i = 0;
+  int iRet = 0;
+  int bSign = 1;
+  if( zArg[0]=='-' ){
+    bSign = -1;
+    i = 1;
+  }
+  while( zArg[i] ){
+    if( zArg[i]<'0' || zArg[i]>'9' ) option_requires_argument_error(pOpt);
+    iRet = iRet*10 + (zArg[i] - '0');
+    i++;
+  }
+  return (iRet*bSign);
+}
+
+static int get_boolean_option(CmdLineOption *pOpt, const char *zArg){
+  if( 0==sqlite3_stricmp(zArg, "true") ) return 1;
+  if( 0==sqlite3_stricmp(zArg, "1") ) return 1;
+  if( 0==sqlite3_stricmp(zArg, "0") ) return 0;
+  if( 0==sqlite3_stricmp(zArg, "false") ) return 0;
+  option_requires_argument_error(pOpt);
+  return 0;
+}
+
+static void parse_command_line(
+  int argc, 
+  char **argv, 
+  int iStart,
+  CmdLineOption *aOpt,
+  void *pStruct,
+  const char *zHelp
+){
+  char *pOut = (char*)pStruct;
+  int bVerbose = 0;
+  int iArg;
+
+  for(iArg=iStart; iArg<argc; iArg++){
+    const char *zArg = argv[iArg];
+    int nArg = strlen(zArg);
+    int nMatch = 0;
+    int iOpt;
+
+    for(iOpt=0; aOpt[iOpt].zText; iOpt++){
+      CmdLineOption *pOpt = &aOpt[iOpt];
+      if( 0==sqlite3_strnicmp(pOpt->zText, zArg, nArg) ){
+        if( nMatch ){
+          ambiguous_option_error(zArg);
+        }
+        nMatch++;
+        if( pOpt->eType==CMDLINE_BARE ){
+          *(int*)(&pOut[pOpt->iOff]) = 1;
+        }else{
+          iArg++;
+          if( iArg==argc ){
+            option_requires_argument_error(pOpt);
+          }
+          switch( pOpt->eType ){
+            case CMDLINE_INTEGER:
+              *(int*)(&pOut[pOpt->iOff]) = get_integer_option(pOpt, argv[iArg]);
+              break;
+            case CMDLINE_STRING:
+              *(const char**)(&pOut[pOpt->iOff]) = argv[iArg];
+              break;
+            case CMDLINE_BOOLEAN:
+              *(int*)(&pOut[pOpt->iOff]) = get_boolean_option(pOpt, argv[iArg]);
+              break;
+          }
+        }
+      }
+    }
+
+    if( nMatch==0 && 0==sqlite3_strnicmp("-cmdline:verbose", zArg, nArg) ){
+      bVerbose = 1;
+      nMatch = 1;
+    }
+
+    if( nMatch==0 ){
+      unknown_option_error(zArg, aOpt, zHelp);
+    }
+  }
+
+  if( bVerbose ){
+    int iOpt;
+    fprintf(stdout, "Options are: ");
+    for(iOpt=0; aOpt[iOpt].zText; iOpt++){
+      CmdLineOption *pOpt = &aOpt[iOpt];
+      if( pOpt->eType!=CMDLINE_BARE || *(int*)(&pOut[pOpt->iOff]) ){
+        fprintf(stdout, "%s ", pOpt->zText);
+      }
+      switch( pOpt->eType ){
+        case CMDLINE_INTEGER:
+          fprintf(stdout, "%d ", *(int*)(&pOut[pOpt->iOff]));
+          break;
+        case CMDLINE_BOOLEAN:
+          fprintf(stdout, "%d ", *(int*)(&pOut[pOpt->iOff]));
+          break;
+        case CMDLINE_STRING:
+          fprintf(stdout, "%s ", *(const char**)(&pOut[pOpt->iOff]));
+          break;
+      }
+    }
+    fprintf(stdout, "\n");
+  }
+}
+/* 
+** End of generic command line parser.
+*************************************************************************/
+
+static void abort_due_to_error(int rc){
+  fprintf(stderr, "Error: %d\n");
+  exit(-1);
+}
+
+static void execsql(sqlite3 *db, const char *zSql){
+  int rc = sqlite3_exec(db, zSql, 0, 0, 0);
+  if( rc!=SQLITE_OK ) abort_due_to_error(rc);
+}
+
+static int xConflict(void *pCtx, int eConflict, sqlite3_changeset_iter *p){
+  return SQLITE_CHANGESET_ABORT;
+}
+
+static void run_test(
+  sqlite3 *db, 
+  sqlite3 *db2, 
+  int nRow, 
+  const char *zSql
+){
+  sqlite3_session *pSession = 0;
+  sqlite3_stmt *pStmt = 0;
+  int rc;
+  int i;
+  int nChangeset;
+  void *pChangeset;
+
+  /* Attach a session object to database db */
+  rc = sqlite3session_create(db, "main", &pSession);
+  if( rc!=SQLITE_OK ) abort_due_to_error(rc);
+
+  /* Configure the session to capture changes on all tables */
+  rc = sqlite3session_attach(pSession, 0);
+  if( rc!=SQLITE_OK ) abort_due_to_error(rc);
+
+  /* Prepare the SQL statement */
+  rc = sqlite3_prepare(db, zSql, -1, &pStmt, 0);
+  if( rc!=SQLITE_OK ) abort_due_to_error(rc);
+
+  /* Open a transaction */
+  execsql(db, "BEGIN");
+
+  /* Execute the SQL statement nRow times */
+  for(i=0; i<nRow; i++){
+    sqlite3_bind_int(pStmt, 1, i);
+    sqlite3_step(pStmt);
+    rc = sqlite3_reset(pStmt);
+    if( rc!=SQLITE_OK ) abort_due_to_error(rc);
+  }
+  sqlite3_finalize(pStmt);
+
+  /* Extract a changeset from the sessions object */
+  rc = sqlite3session_changeset(pSession, &nChangeset, &pChangeset);
+  if( rc!=SQLITE_OK ) abort_due_to_error(rc);
+  execsql(db, "COMMIT");
+
+  /* Apply the changeset to the second db */
+  rc = sqlite3changeset_apply(db2, nChangeset, pChangeset, 0, xConflict, 0);
+  if( rc!=SQLITE_OK ) abort_due_to_error(rc);
+
+  /* Cleanup */
+  sqlite3_free(pChangeset);
+  sqlite3session_delete(pSession);
+}
+
+int main(int argc, char **argv){
+  struct Options {
+    int nRow;
+    int bWithoutRowid;
+    int bInteger;
+    int bAll;
+    const char *zDb;
+  };
+  struct Options o = { 2500, 0, 0, 0, "session_speed_test.db" };
+
+  CmdLineOption aOpt[] = {
+    CMDLINE_INT32( "-rows", "number of rows in test",
+      offsetof(struct Options, nRow) ),
+    CMDLINE_BOOL("-without-rowid", "use WITHOUT ROWID tables", 
+      offsetof(struct Options, bWithoutRowid) ),
+    CMDLINE_BOOL("-integer", "use integer data (instead of text/blobs)",
+      offsetof(struct Options, bInteger) ),
+    CMDLINE_NONE("-all", "Run all 4 combos of -without-rowid and -integer",
+      offsetof(struct Options, bAll) ),
+    CMDLINE_TEXT("-database", "prefix for database files to use",
+      offsetof(struct Options, zDb) ),
+    {0, 0, 0, 0}
+  };
+
+  const char *azCreate[] = {
+    "CREATE TABLE t1(a PRIMARY KEY, b, c, d)",
+    "CREATE TABLE t1(a PRIMARY KEY, b, c, d) WITHOUT ROWID",
+  };
+
+  const char *azInsert[] = {
+    "INSERT INTO t1 VALUES("
+    "printf('%.8d',?), randomblob(50), randomblob(50), randomblob(50))",
+    "INSERT INTO t1 VALUES(?, random(), random(), random())"
+  };
+
+  const char *azUpdate[] = {
+    "UPDATE t1 SET d = randomblob(50) WHERE a = printf('%.8d',?)",
+    "UPDATE t1 SET d = random() WHERE a = ?"
+  };
+
+  const char *azDelete[] = {
+    "DELETE FROM t1 WHERE a = printf('%.8d',?)",
+    "DELETE FROM t1 WHERE a = ?"
+  };
+
+  int rc;
+  sqlite3 *db;
+  sqlite3 *db2;
+  char *zDb2;
+  int bWithoutRowid;
+  int bInteger;
+
+  parse_command_line(argc, argv, 1, aOpt, (void*)&o,
+    "This program creates two new, empty, databases each containing a single\n"
+    "table. It then does the following:\n\n"
+    "  1. Inserts -rows rows into the first database\n"
+    "  2. Updates each row in the first db\n"
+    "  3. Delete each row from the first db\n\n"
+    "The modifications made by each step are captured in a changeset and\n"
+    "applied to the second database.\n"
+  );
+  zDb2 = sqlite3_mprintf("%s2", o.zDb);
+
+  for(bWithoutRowid=0; bWithoutRowid<2; bWithoutRowid++){
+    for(bInteger=0; bInteger<2; bInteger++){
+      if( o.bAll || (o.bWithoutRowid==bWithoutRowid && o.bInteger==bInteger) ){
+        fprintf(stdout, "Testing %s data with %s table\n",
+            bInteger ? "integer" : "blob/text",
+            bWithoutRowid ? "WITHOUT ROWID" : "rowid"
+        );
+
+        /* Open new database handles on two empty databases */
+        unlink(o.zDb);
+        rc = sqlite3_open(o.zDb, &db);
+        if( rc!=SQLITE_OK ) abort_due_to_error(rc);
+        unlink(zDb2);
+        rc = sqlite3_open(zDb2, &db2);
+        if( rc!=SQLITE_OK ) abort_due_to_error(rc);
+
+        /* Create the schema in both databases. */
+        execsql(db, azCreate[o.bWithoutRowid]);
+        execsql(db2, azCreate[o.bWithoutRowid]);
+
+        /* Run the three tests */
+        run_test(db, db2, o.nRow, azInsert[o.bInteger]);
+        run_test(db, db2, o.nRow, azUpdate[o.bInteger]);
+        run_test(db, db2, o.nRow, azDelete[o.bInteger]);
+
+        /* Close the db handles */
+        sqlite3_close(db);
+        sqlite3_close(db2);
+      }
+    }
+  }
+
+
+  return 0;
+}
+
+