SQLite

**    May you find forgiveness for yourself and forgive others.
**    May you share freely, never taking more than you give.
**
*************************************************************************
** This file contains code to implement the "sqlite" command line
** utility for accessing SQLite databases.
**
** $Id: shell.c,v 1.209 2009/05/21 15:15:01 drh Exp $
*/
#if defined(_WIN32) || defined(WIN32)
/* This needs to come before any includes for MSVC compiler */
#define _CRT_SECURE_NO_WARNINGS
#endif

#include <stdlib.h>

/*
** Execute a query statement that has a single result column.  Print
** that result column on a line by itself with a semicolon terminator.
**
** This is used, for example, to show the schema of the database by
** querying the SQLITE_MASTER table.
*/
static int run_table_dump_query(
  FILE *out,              /* Send output here */
  sqlite3 *db,            /* Database to query */
  const char *zSelect,    /* SELECT statement to extract content */
  const char *zFirstRow   /* Print before first row, if not NULL */
){
  sqlite3_stmt *pSelect;
  int rc;
  rc = sqlite3_prepare(db, zSelect, -1, &pSelect, 0);
  if( rc!=SQLITE_OK || !pSelect ){
    return rc;
  }
  rc = sqlite3_step(pSelect);
  while( rc==SQLITE_ROW ){
    if( zFirstRow ){
      fprintf(out, "%s", zFirstRow);
      zFirstRow = 0;
    }
    fprintf(out, "%s;\n", sqlite3_column_text(pSelect, 0));
    rc = sqlite3_step(pSelect);
  }
  return sqlite3_finalize(pSelect);
}


/*
** This is a different callback routine used for dumping the database.
** Each row received by this callback consists of a table name,
** the table type ("index" or "table") and SQL to create the table.
** This routine should print text sufficient to recreate the table.
*/
static int dump_callback(void *pArg, int nArg, char **azArg, char **azCol){
  int rc;
  const char *zTable;
  const char *zType;
  const char *zSql;
  const char *zPrepStmt = 0;
  struct callback_data *p = (struct callback_data *)pArg;

  UNUSED_PARAMETER(azCol);
  if( nArg!=3 ) return 1;
  zTable = azArg[0];
  zType = azArg[1];
  zSql = azArg[2];
  
  if( strcmp(zTable, "sqlite_sequence")==0 ){
    zPrepStmt = "DELETE FROM sqlite_sequence;\n";
  }else if( strcmp(zTable, "sqlite_stat1")==0 ){
    fprintf(p->out, "ANALYZE sqlite_master;\n");
  }else if( strncmp(zTable, "sqlite_", 7)==0 ){
    return 0;
  }else if( strncmp(zSql, "CREATE VIRTUAL TABLE", 20)==0 ){
    char *zIns;
    if( !p->writableSchema ){

  }

  if( strcmp(zType, "table")==0 ){
    sqlite3_stmt *pTableInfo = 0;
    char *zSelect = 0;
    char *zTableInfo = 0;
    char *zTmp = 0;
    int nRow = 0;
   
    zTableInfo = appendText(zTableInfo, "PRAGMA table_info(", 0);
    zTableInfo = appendText(zTableInfo, zTable, '"');
    zTableInfo = appendText(zTableInfo, ");", 0);

    rc = sqlite3_prepare(p->db, zTableInfo, -1, &pTableInfo, 0);
    free(zTableInfo);
    if( rc!=SQLITE_OK || !pTableInfo ){
      return 1;
    }

    zSelect = appendText(zSelect, "SELECT 'INSERT INTO ' || ", 0);
    zTmp = appendText(zTmp, zTable, '"');
    if( zTmp ){

      zSelect = appendText(zSelect, zText, '"');
      rc = sqlite3_step(pTableInfo);
      if( rc==SQLITE_ROW ){
        zSelect = appendText(zSelect, ") || ',' || ", 0);
      }else{
        zSelect = appendText(zSelect, ") ", 0);
      }
      nRow++;
    }
    rc = sqlite3_finalize(pTableInfo);
    if( rc!=SQLITE_OK || nRow==0 ){
      free(zSelect);
      return 1;
    }
    zSelect = appendText(zSelect, "|| ')' FROM  ", 0);
    zSelect = appendText(zSelect, zTable, '"');

    rc = run_table_dump_query(p->out, p->db, zSelect, zPrepStmt);
    if( rc==SQLITE_CORRUPT ){
      zSelect = appendText(zSelect, " ORDER BY rowid DESC", 0);
      rc = run_table_dump_query(p->out, p->db, zSelect, 0);
    }
    if( zSelect ) free(zSelect);
  }
  return 0;
}

/*

      );
      run_schema_dump_query(p, 
        "SELECT name, type, sql FROM sqlite_master "
        "WHERE name=='sqlite_sequence'", 0
      );
      run_table_dump_query(p->out, p->db,
        "SELECT sql FROM sqlite_master "
        "WHERE sql NOT NULL AND type IN ('index','trigger','view')", 0
      );
    }else{
      int i;
      for(i=1; i<nArg; i++){
        zShellStatic = azArg[i];
        run_schema_dump_query(p,
          "SELECT name, type, sql FROM sqlite_master "
          "WHERE tbl_name LIKE shellstatic() AND type=='table'"
          "  AND sql NOT NULL", 0);
        run_table_dump_query(p->out, p->db,
          "SELECT sql FROM sqlite_master "
          "WHERE sql NOT NULL"
          "  AND type IN ('index','trigger','view')"
          "  AND tbl_name LIKE shellstatic()", 0
        );
        zShellStatic = 0;
      }
    }
    if( p->writableSchema ){
      fprintf(p->out, "PRAGMA writable_schema=OFF;\n");
      p->writableSchema = 0;