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SimpleDateFormat performance improvement, thread-safe.

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Barry Lind
This commit is contained in:
Bruce Momjian 2001-06-29 17:23:33 +00:00
parent 39381507b7
commit db491a6d78
1 changed files with 8 additions and 19 deletions
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27
src/interfaces/jdbc/org/postgresql/jdbc2/PreparedStatement.java
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@ -65,14 +65,6 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta
this.sql = sql; this.sql = sql;
this.connection = connection; this.connection = connection;
// might just as well create it here, so we don't take the hit later
SimpleDateFormat df = new SimpleDateFormat("''yyyy-MM-dd''");
tl_df.set(df);
df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
tl_tsdf.set(df);
for (i = 0; i < sql.length(); ++i) for (i = 0; i < sql.length(); ++i)
{ {
int c = sql.charAt(i); int c = sql.charAt(i);
@ -95,17 +87,6 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta
templateStrings[i] = (String)v.elementAt(i); templateStrings[i] = (String)v.elementAt(i);
} }
/**
* New in 7.1 - overides Statement.close() to dispose of a few local objects
*/
public void close() throws SQLException
{
// free the ThreadLocal caches
tl_df.set(null);
tl_tsdf.set(null);
super.close();
}
/** /**
* A Prepared SQL query is executed and its ResultSet is returned * A Prepared SQL query is executed and its ResultSet is returned
* *
@ -343,6 +324,10 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta
public void setDate(int parameterIndex, java.sql.Date x) throws SQLException public void setDate(int parameterIndex, java.sql.Date x) throws SQLException
{ {
SimpleDateFormat df = (SimpleDateFormat) tl_df.get(); SimpleDateFormat df = (SimpleDateFormat) tl_df.get();
if(df==null) {
df = new SimpleDateFormat("''yyyy-MM-dd''");
tl_df.set(df);
}
set(parameterIndex, df.format(x)); set(parameterIndex, df.format(x));
@ -382,6 +367,10 @@ public class PreparedStatement extends Statement implements java.sql.PreparedSta
public void setTimestamp(int parameterIndex, Timestamp x) throws SQLException public void setTimestamp(int parameterIndex, Timestamp x) throws SQLException
{ {
SimpleDateFormat df = (SimpleDateFormat) tl_tsdf.get(); SimpleDateFormat df = (SimpleDateFormat) tl_tsdf.get();
if(df==null) {
df = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
tl_tsdf.set(df);
}
df.setTimeZone(TimeZone.getTimeZone("GMT")); df.setTimeZone(TimeZone.getTimeZone("GMT"));
// Use the shared StringBuffer // Use the shared StringBuffer