ios - Combine two sqlite3 queries -


can combine these 2 queries how?

i'm getting error of table not found in second query, , think of sqlite calls in first query.

nsstring *dayname = del.dayname; int rowcount = del.tablerownumber;  nsstring *sqlitedb = [[nsbundle mainbundle] pathforresource:@"banklist" oftype:@"sqlite3"];  if(sqlite3_open([sqlitedb utf8string], &_database) == sqlite_ok) {     nsstring *sqlstatement = [nsstring stringwithformat:@"update %@ set recipe_name='%@' cell_id='%i'",dayname, info.name, rowcount];     sqlite3_stmt *compiledstatement;      if(sqlite3_prepare_v2(_database, [sqlstatement utf8string] , -1, &compiledstatement, null) == sqlite_ok)     {         sqlite3_bind_text( compiledstatement, 1, [sqlitedb utf8string], -1, sqlite_transient);     }     if(sqlite3_step(compiledstatement) != sqlite_done )     {         nslog( @"save error: %s", sqlite3_errmsg(_database) );     }     else     {         sqlite3_reset(compiledstatement);     }      sqlite3_finalize(compiledstatement);       nsstring *sqlstatement2 = [nsstring stringwithformat:@"update %@ set recipe_id = (select key recipes name = monday.recipe_name)",dayname];     sqlite3_stmt *compiledstatement2;      if(sqlite3_prepare_v2(_database, [sqlstatement2 utf8string] , -1, &compiledstatement2, null) == sqlite_ok)     {         sqlite3_bind_text( compiledstatement2, 1, [sqlitedb utf8string], -1, sqlite_transient);     }     if(sqlite3_step(compiledstatement2) != sqlite_done )     {         nslog( @"save error: %s", sqlite3_errmsg(_database) );     }     else     {         sqlite3_reset(compiledstatement2);     }      sqlite3_finalize(compiledstatement2); }  sqlite3_close(_database);

thanks

a couple of observations:

  1. you might not want supply parameters query using stringwithformat. if recipe "pat's infamous cookies"? apostrophe interpreted terminating string , prepare function fail. should use ? placeholders in sql , bind values. see section 3 of sqlite documentation.

  2. while i'm suggesting use sqlite3_bind_text function above, calling sqlite3_bind_text , passing path database file. that

    • doesn't make sense given sql, because don't have ? placeholders bind value to; and

    • i'm not sure why you'd passing path of database @ all.

    that call doesn't seem possibly work. if check return code of existing sqlite_bind_text call, i'd wager not sqlite_ok.

  3. if sqlite3_prepare_v2 calls fail (and common point of failure while you're refining sql), you're not logging sqlite3_errmsg. sqlite3_errmsg after sqlite3_prepare_v2 failure 1 of useful error messages (it tell precisely wrong sql). make sure examine sqlite3_errmsg if sqlite3_prepare_v2 not return sqlite_ok.

thus might yield:

if(sqlite3_open([sqlitedb utf8string], &_database) == sqlite_ok) {     nsstring *sqlstatement = [nsstring stringwithformat:@"update %@ set recipe_name=? cell_id=?",dayname];     sqlite3_stmt *compiledstatement;      if(sqlite3_prepare_v2(_database, [sqlstatement utf8string] , -1, &compiledstatement, null) != sqlite_ok)     {         nslog(@"%s: prepare failed: %s", __function__, sqlite3_errmsg(_database));         sqlite3_close(_database);         return;     }      if (sqlite3_bind_text( compiledstatement, 1, [info.name utf8string], -1, sqlite_transient) != sqlite_ok)     {         nslog(@"%s: bind_text failed: %s", __function__, sqlite3_errmsg(_database));         sqlite3_finalize(compiledstatement);         sqlite3_close(_database);         return;     }      if (sqlite3_bind_int( compiledstatement, 2, rowcount) != sqlite_ok)     {         nslog(@"%s: bind_int failed: %s", __function__, sqlite3_errmsg(_database));         sqlite3_finalize(compiledstatement);         sqlite3_close(_database);         return;     }      if (sqlite3_step(compiledstatement) != sqlite_done )     {         nslog(@"save error: %s", sqlite3_errmsg(_database) );         sqlite3_finalize(compiledstatement);         sqlite3_close(_database);         return;     }      // don't need unless you're going reuse prepared statement, aren't     //     //else     //{     //    sqlite3_reset(compiledstatement);     //}      sqlite3_finalize(compiledstatement);      // did mean hardcode "monday" in sql?      nsstring *sqlstatement2 = [nsstring stringwithformat:@"update %@ set recipe_id = (select key recipes name = monday.recipe_name)",dayname];     sqlite3_stmt *compiledstatement2;      if(sqlite3_prepare_v2(_database, [sqlstatement2 utf8string] , -1, &compiledstatement2, null) != sqlite_ok)     {         nslog(@"%s: prepare 2 failed: %s", __function__, sqlite3_errmsg(_database));         sqlite3_close(_database);         return;     }     if(sqlite3_step(compiledstatement2) != sqlite_done )     {         nslog( @"save 2 error: %s", sqlite3_errmsg(_database) );     }      // again, not needed     //     //else     //{     //    sqlite3_reset(compiledstatement);     //}      sqlite3_finalize(compiledstatement2); }  sqlite3_close(_database);

i must confess i'm not crazy data model you're building sql, dynamically supplying table names. i'd rather see single table of days, , make dayname column in table. have should work, it's unusual construct.


Comments

Post a Comment

Popular posts from this blog

How to remove text and logo OR add Overflow on Android ActionBar using AppCompat on API 8? -

have researched death , cannot find answer. i have actionbar using appcompat. supporting api v7 (api v8 do). actionbar works api v11. api < v11 has problem of removing icon (and feature) actionbar without supplying overflow. big picture have app logo, app title, , 3 icons squidging same actionbar on low end phone. trying make room! i happy 1 of 2 solutions. either: a method of getting overflow functionality can retrieved pull down. (preferred) method of removing icon , text actionbar below current xml api 11+: <resources> <!-- base application theme api 11+. theme replaces appbasetheme res/values/styles.xml on api 11+ devices. --> <style name="appbasetheme" parent="theme.appcompat.light.darkactionbar"> <item name="android:actionbarstyle">@style/liteactionbarstyle</item> <item name="actionbarstyle">@style/liteactionbarstyle</item> </st...
Read more

html - How to style widget with post count different than without post count -

i have border below li elements in wordpress widget types appropriate. element inside set block gives them nice easy click full width. the problem, when choose option "show post count" when adding widget such categories or archives displays post count plain text after tag , because tag block pushes post number text line below. whether choose show post count or not show post count still gives exact same element identifyer example "widget_categories". how style post count not on next line still keep links non post count list items full width? here's example on sidebar www.bbmthemes.com/themes/modular/blog-standard/ in order solve problem need remove display:block; for ul.widgets ul a , add in it's place line-height: 33px; what going achieve have same visual effect. what going lose doing links going work on text , not on "box". the other way out of find post count coming , make changes this. example change text count i...
Read more

url rewriting - How to redirect a http POST with urlrewritefilter -

i have question urlrewritefilter , until not find in net. i want redirect http post in tomcat7. here example... the call http post ulr http://localhost:8080/oldapplication/example?a=123&b=2 this call contains content either xml or json. filter configured works , urlrewrite.xml contains: <?xml version="1.0" encoding="utf-8"?> <!doctype urlrewrite public "-//tuckey.org//dtd urlrewrite 4.0//en" "http://www.tuckey.org/res/dtds/urlrewrite4.0.dtd"> <urlrewrite use-query-string="true"> <rule> <condition type="method">post</condition> <from>^(.*)$</from> <to type="redirect">/newapplication$1</to> </rule> </urlrewrite> in access log can see call http://localhost:8080/oldapplication/example?a=123&b=2 gets redirected http://localhost:8080/newapplication/example?a=123&b=2 fine until now. pr...
Read more