From: | Jeffrey Graham <jgraham(at)lincom-asg(dot)com> |
---|---|
To: | pgsql-interfaces(at)postgresql(dot)org |
Subject: | How to use embedded sql to define an array |
Date: | 2002-06-10 16:07:52 |
Message-ID: | 3D04CED8.2020202@lincom-asg.com |
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Lists: | pgsql-interfaces |
Hello everyone,
Can someone please tell me how to declare an array of double (float8)
using esql when you
don't know how long the array is until runtime?
I have the code work for a fixed length of 10, but at run-time I might only
put 2 values or there could just as easily be 100 or 200 or 5000!
I tried several variations declaring my array as a pointer, but ecpg did
not like
any of my attempts.
Thanks,
Jeff
void myinsert(const std::vector<double>& myVector)
{
EXEC SQL BEGIN DECLARE SECTION;
/* this would be ideal but ecpg does not like it */
/* double m_data[myVector.length()]; */
/* This works but length might actually be 1 or 200! */
double m_data[10];
EXEC SQL END DECLARE SECTION;
/* stuff the sql array with data from my stl vector */
for ( unsigned int i=0; i < myVector.length(); i++ )
m_data[i] = myVector[i];
EXEC SQL
insert into eraDATA
( data )
VALUES( :m_data );
return sqlOK();
}
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