StackOverflow2013

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plurals

PO
primarykey
Id
10922325
data
AcceptedAnswerId
0
AnswerCount
0
ClosedDate
CommentCount
2
CommunityOwnedDate
CreationDate
2012-06-06T21:08:55.590
FavoriteCount
0
LastActivityDate
2012-06-06T21:18:03.153
LastEditDate
2012-06-06T21:18:03.153
LastEditorUserId
1331415
OwnerUserId
1331415
ParentId
10922217
PostTypeId
2
Score
1
ViewCount
0
LastEditorDisplayName
text
Body
First thing what you want to fix is please don't use <code>String</code> instance when you want to change it. <code>String</code> intance is immutable and when you modify already created <code>String</code>, new modified instance is created and it is not free. You should to use <code>StringBuilder</code> for this that have instance methods which allow to modify it without need to create new instance. I recommend to you use always <code>StringBuilder</code> when you modifying <code>String</code>. and second so you call <code>con.prepareStatement(sql)</code> and then you modify its sql field. it's not good is't? So only add it after your work with String. <pre><code>String sql = "CREATE TABLE if not exists itemset (?"; for(int j=1; j < ccolumns; j++) { sql += ",?"; } sql += ")"; System.out.println(sql); up1 = con.prepareStatement(sql); for(int j=1; j < ccolumns+1; j++) { System.out.println(j); up1.setString(j, "item"+j+" TINYINT(10)"); } up1.executeQuery(); </code></pre> You cannot call <code>prepareStatement</code> with given <code>String</code> and then modify it. <hr> But more cleaner and faster try to do it like this <pre><code>StringBuilder sqlStatement = new StringBuilder( "CREATE TABLE if not exists itemset (?"); for(int j=1; j < ccolumns; j++) { sqlStatement.append(",?"); } sqlStatement.append(")"); up1 = con.prepareStatement(sqlStatement.toString()); for(int j=1; j < ccolumns+1; j++) { System.out.println(j); up1.setString(j, "item"+j+" TINYINT(10)"); } up1.executeQuery(); </code></pre>
Tags
Title
singulars
PostAcceptedAnswerId
1. This table or related slice is empty.
PostParentId
1. POError in passing SQL command through a prepared statement via jdbc
 singulars
 PostTypePostTypeId
 PTQuestion
PostTypePostTypeId
1. PTAnswer
UserLastEditorUserId
1. USSimon Dorociak
UserOwnerUserId
1. USSimon Dorociak
plurals
PostLinksPostIdRelatedPostId
1. This table or related slice is empty.
PostLinksRelatedPostIdPostId
1. This table or related slice is empty.
PostsAcceptedAnswerId
1. This table or related slice is empty.
PostsParentIdCreationDate
1. This table or related slice is empty.
VotesPostIdCreationDate
1. VO
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 UserUserId
 This table or related slice is empty.
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 VTUpMod
CommentsPostId
1. CO@PhilippReichart sorry, bad replace immediately i saw it, corrected.
 singulars
 PostPostId
 PO
 UserUserId
 USSimon Dorociak
2. COThe error is in giving the preparestatement before the string,by using the StringBuilder it stills give the problem i have mentioned in reply to andriy,anyways i didnt know abt the StringBuilder thanks
 singulars
 PostPostId
 PO
 UserUserId
 USStrawhatLuffy

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