flatgeobuf_agg_transfn()

void flatgeobuf_agg_transfn

(

struct flatgeobuf_agg_ctx *

ctx

)

Aggregation step.

Expands features array if needed by a factor of 2. Allocates a new feature, increment feature counter and encode properties into it.  

Definition at line 519 of file flatgeobuf.c.

{
        LWGEOM *lwgeom = NULL;
        bool isnull = false;
        Datum datum;
        GSERIALIZED *gs;
 
        if (ctx->ctx->features_count == 0)
                inspect_table(ctx);
 
        datum = GetAttributeByNum(ctx->row, ctx->geom_index + 1, &isnull);
        if (!isnull) {
                gs = (GSERIALIZED *) PG_DETOAST_DATUM_COPY(datum);
                lwgeom = lwgeom_from_gserialized(gs);
        }
        ctx->ctx->lwgeom = lwgeom;
 
        if (ctx->ctx->features_count == 0)
                flatgeobuf_encode_header(ctx->ctx);
 
        encode_properties(ctx);
        if (ctx->ctx->create_index)
                ensure_items_len(ctx);
        flatgeobuf_encode_feature(ctx->ctx);
}

References flatgeobuf_agg_ctx::ctx, encode_properties(), ensure_items_len(), inspect_table(), and lwgeom_from_gserialized().

Referenced by pgis_asflatgeobuf_transfn().

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