json_categorize_type()

static void json_categorize_type ( Oid  typoid, JsonTypeCategory *  tcategory, Oid *  outfuncoid  )

static

Definition at line 244 of file lwgeom_out_geojson.c.

{
        bool            typisvarlena;
 
        /* Look through any domain */
        typoid = getBaseType(typoid);
 
        *outfuncoid = InvalidOid;
 
        /*
         * We need to get the output function for everything except date and
         * timestamp types, array and composite types, booleans, and non-builtin
         * types where there's a cast to json.
         */
 
        switch (typoid)
        {
                case BOOLOID:
                        *tcategory = JSONTYPE_BOOL;
                        break;
 
                case INT2OID:
                case INT4OID:
                case INT8OID:
                case FLOAT4OID:
                case FLOAT8OID:
                case NUMERICOID:
                        getTypeOutputInfo(typoid, outfuncoid, &typisvarlena);
                        *tcategory = JSONTYPE_NUMERIC;
                        break;
 
                case DATEOID:
                        *tcategory = JSONTYPE_DATE;
                        break;
 
                case TIMESTAMPOID:
                        *tcategory = JSONTYPE_TIMESTAMP;
                        break;
 
                case TIMESTAMPTZOID:
                        *tcategory = JSONTYPE_TIMESTAMPTZ;
                        break;
 
                case JSONOID:
                case JSONBOID:
                        getTypeOutputInfo(typoid, outfuncoid, &typisvarlena);
                        *tcategory = JSONTYPE_JSON;
                        break;
 
                default:
                        /* Check for arrays and composites */
                        if (OidIsValid(get_element_type(typoid)) || typoid == ANYARRAYOID
                                || typoid == RECORDARRAYOID)
                                *tcategory = JSONTYPE_ARRAY;
                        else if (type_is_rowtype(typoid))       /* includes RECORDOID */
                                *tcategory = JSONTYPE_COMPOSITE;
                        else
                        {
                                /* It's probably the general case ... */
                                *tcategory = JSONTYPE_OTHER;
                                /* but let's look for a cast to json, if it's not built-in */
                                if (typoid >= FirstNormalObjectId)
                                {
                                        Oid                     castfunc;
                                        CoercionPathType ctype;
 
                                        ctype = find_coercion_pathway(JSONOID, typoid,
                                                                                                  COERCION_EXPLICIT,
                                                                                                  &castfunc);
                                        if (ctype == COERCION_PATH_FUNC && OidIsValid(castfunc))
                                        {
                                                *tcategory = JSONTYPE_CAST;
                                                *outfuncoid = castfunc;
                                        }
                                        else
                                        {
                                                /* non builtin type with no cast */
                                                getTypeOutputInfo(typoid, outfuncoid, &typisvarlena);
                                        }
                                }
                                else
                                {
                                        /* any other builtin type */
                                        getTypeOutputInfo(typoid, outfuncoid, &typisvarlena);
                                }
                        }
                        break;
        }
}

References JSONTYPE_ARRAY, JSONTYPE_BOOL, JSONTYPE_CAST, JSONTYPE_COMPOSITE, JSONTYPE_DATE, JSONTYPE_JSON, JSONTYPE_NUMERIC, JSONTYPE_OTHER, JSONTYPE_TIMESTAMP, and JSONTYPE_TIMESTAMPTZ.

Referenced by array_to_json_internal(), composite_to_geojson(), and composite_to_json().

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