execute.pgc

来自「postgresql8.3.4源码,开源数据库」· PGC 代码 · 共 95 行

#include <stdlib.h>
#include <string.h>
#include <stdlib.h>
#include <stdio.h>

exec sql include ../regression;

exec sql whenever sqlerror sqlprint;

int
main(void)
{
exec sql begin declare section;
	int amount[8];
	int increment=100;
	char name[8][8];
	char letter[8][1];
	char command[128];
exec sql end declare section;
	int i,j;

	ECPGdebug(1, stderr);

	exec sql connect to REGRESSDB1 as main;
	exec sql create table test (name char(8), amount int, letter char(1));
	exec sql commit;

	sprintf(command, "insert into test (name, amount, letter) values ('db: ''r1''', 1, 'f')");
	exec sql execute immediate :command;

	sprintf(command, "insert into test (name, amount, letter) values ('db: ''r1''', 2, 't')");
	exec sql execute immediate :command;

	sprintf(command, "insert into test (name, amount, letter) select name, amount+10, letter from test");
	exec sql execute immediate :command;

	printf("Inserted %ld tuples via execute immediate\n", sqlca.sqlerrd[2]);

	sprintf(command, "insert into test (name, amount, letter) select name, amount+$1, letter from test");
	exec sql prepare I from :command;
	exec sql execute I using :increment;

	printf("Inserted %ld tuples via prepared execute\n", sqlca.sqlerrd[2]);

	exec sql commit;

	sprintf (command, "select * from test");

	exec sql prepare f from :command;
	exec sql declare CUR cursor for f;

	exec sql open CUR;
	exec sql fetch 8 in CUR into :name, :amount, :letter;

	for (i=0, j=sqlca.sqlerrd[2]; i<j; i++)
	{
		exec sql begin declare section;
		char n[8], l = letter[i][0];
		int a = amount[i];
		exec sql end declare section;

		strncpy(n, name[i], 8);
		printf("name[%d]=%8.8s\tamount[%d]=%d\tletter[%d]=%c\n", i, n, i, a, i, l);
	}

	exec sql close CUR;
	exec sql deallocate f;

	sprintf (command, "select * from test where amount = $1");

	exec sql prepare f from :command;
	exec sql declare CUR2 cursor for f;

	exec sql open CUR2 using 1;
	exec sql fetch in CUR2 into :name, :amount, :letter;

	for (i=0, j=sqlca.sqlerrd[2]; i<j; i++)
	{
		exec sql begin declare section;
		char n[8], l = letter[i][0];
		int a = amount[i];
		exec sql end declare section;

		strncpy(n, name[i], 8);
		printf("name[%d]=%8.8s\tamount[%d]=%d\tletter[%d]=%c\n", i, n, i, a, i, l);
	}

	exec sql close CUR2;
	exec sql drop table test;
	exec sql commit;
	exec sql disconnect;

	return (0);
}