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Patch for jdbc2 ResultSet.java. Looks like performance improvement.

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Joseph Shraibman
This commit is contained in:
Bruce Momjian 2001-09-07 22:15:55 +00:00
parent 1834987fb6
commit 6ea41dcc7b
1 changed files with 20 additions and 15 deletions
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35
src/interfaces/jdbc/org/postgresql/jdbc2/ResultSet.java
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@ -134,7 +134,6 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
{
//release resources held (memory for tuples)
if(rows!=null) {
rows.setSize(0);
rows=null;
}
}
@ -710,7 +709,8 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
{
int i;
for (i = 0 ; i < fields.length; ++i)
final int flen = fields.length;
for (i = 0 ; i < flen; ++i)
if (fields[i].getName().equalsIgnoreCase(columnName))
return (i+1);
throw new PSQLException ("postgresql.res.colname",columnName);
@ -726,11 +726,13 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
if (index==0)
throw new SQLException("Cannot move to index of 0");
final int rows_size = rows.size();
//if index<0, count from the end of the result set, but check
//to be sure that it is not beyond the first index
if (index<0)
if (index>=-rows.size())
internalIndex=rows.size()+index;
if (index > -rows_size)
internalIndex = rows_size+index;
else {
beforeFirst();
return false;
@ -739,7 +741,7 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
//must be the case that index>0,
//find the correct place, assuming that
//the index is not too large
if (index<=rows.size())
if (index <= rows_size)
internalIndex = index-1;
else {
afterLast();
@ -753,8 +755,9 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
public void afterLast() throws SQLException
{
if (rows.size() > 0)
current_row = rows.size();
final int rows_size = rows.size();
if (rows_size > 0)
current_row = rows_size;
}
public void beforeFirst() throws SQLException
@ -967,7 +970,8 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
public boolean isAfterLast() throws SQLException
{
return (current_row >= rows.size() && rows.size() > 0);
final int rows_size = rows.size();
return (current_row >= rows_size && rows_size > 0);
}
public boolean isBeforeFirst() throws SQLException
@ -982,16 +986,18 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
public boolean isLast() throws SQLException
{
return (current_row == rows.size() -1 && rows.size() > 0);
final int rows_size = rows.size();
return (current_row == rows_size -1 && rows_size > 0);
}
public boolean last() throws SQLException
{
if (rows.size() <= 0)
return false;
current_row = rows.size() - 1;
this_row = (byte [][])rows.elementAt(current_row);
return true;
final int rows_size = rows.size();
if (rows_size <= 0)
return false;
current_row = rows_size - 1;
this_row = (byte [][])rows.elementAt(current_row);
return true;
}
public void moveToCurrentRow() throws SQLException
@ -1480,4 +1486,3 @@ public class ResultSet extends org.postgresql.ResultSet implements java.sql.Resu
}
}
}