TYPE — define a new data type
TYPEtype_name
ISctype
The TYPE
command defines a new C type. It is
equivalent to putting a typedef
into a declare
section.
This command is only recognized when ecpg
is
run with the -c
option.
type_name
The name for the new type. It must be a valid C type name.
ctype
A C type specification.
EXEC SQL TYPE customer IS struct { varchar name[50]; int phone; }; EXEC SQL TYPE cust_ind IS struct ind { short name_ind; short phone_ind; }; EXEC SQL TYPE c IS char reference; EXEC SQL TYPE ind IS union { int integer; short smallint; }; EXEC SQL TYPE intarray IS int[AMOUNT]; EXEC SQL TYPE str IS varchar[BUFFERSIZ]; EXEC SQL TYPE string IS char[11];
Here is an example program that uses EXEC SQL
TYPE
:
EXEC SQL WHENEVER SQLERROR SQLPRINT; EXEC SQL TYPE tt IS struct { varchar v[256]; int i; }; EXEC SQL TYPE tt_ind IS struct ind { short v_ind; short i_ind; }; int main(void) { EXEC SQL BEGIN DECLARE SECTION; tt t; tt_ind t_ind; EXEC SQL END DECLARE SECTION; EXEC SQL CONNECT TO testdb AS con1; EXEC SQL SELECT current_database(), 256 INTO :t:t_ind LIMIT 1; printf("t.v = %s\n", t.v.arr); printf("t.i = %d\n", t.i); printf("t_ind.v_ind = %d\n", t_ind.v_ind); printf("t_ind.i_ind = %d\n", t_ind.i_ind); EXEC SQL DISCONNECT con1; return 0; }
The output from this program looks like this:
t.v = testdb t.i = 256 t_ind.v_ind = 0 t_ind.i_ind = 0
The TYPE
command is a PostgreSQL extension.