reading array[text] in C extension function

[Rémi Cura <remi.cura@xxxxxxxxx>]

Hey,

I'm trying to use an array of text as input in a C function in a custom extension.

the prototype of the sql function is  :

CREATE OR REPLACE FUNCTION pc_subset(  dimensions TEXT[])

 

it is called like :

pc_subset(  ARRAY['X'::text,'Y'::text])

and the C function trying to read the text array (converting it to cstring ) :

text ** vals;

char ** cstring_array;

nelems = ARR_DIMS(arrptr)[0];

vals = (text**) ARR_DATA_PTR(arrptr);

cstring_array = (char **) pcalloc(nelems * sizeof(char * ) );

for (i3=0;i3<nelems;i3++)

{ 

cstring_array[i3] = text_to_cstring( vals[i3]);

elog(INFO, "elem %d of dim_array : %s\n",i3,cstring_array[i3]);

}

I crashes postgres because of a segfault.

Any help appreciated =)

Cheers,

Rémi-C