odbx_field_length(3)

💅 odbx_field_length(3) 💅

okay bestie, welcome to the OpenDBX manual corner 💖 we're talking about odbx_field_length(3) and honestly it's giving “tiny function, very specific job.” let's get into it ✨

---

🌸 NAME 🌸

odbx_field_length — returns the length of a field value 💫

---

🎀 SYNOPSIS 🎀

#include <opendbx/api.h>

unsigned long odbx_field_length (odbx_result_t* result, unsigned long
                                pos);

---

🦋 DESCRIPTION 🦋

so odbx_field_length() returns the length of the field value in bytes, no cap. the field is part of the current row that was retrieved by the latest call to odbx_row_fetch(), and it's specified by the column index you pass in through pos 💅

the result parameter this function needs has to be a valid result set returned by odbx_result(), and it must not have been fed to odbx_result_finish() before you call this. periodt 🫶

valid column indices for the requested column you provide via pos start with zero and end with the value returned by odbx_column_count() minus one. iconic indexing behavior, honestly ✨

---

🔥 RETURN VALUE 🔥

odbx_field_length() provides the number of bytes of the specified field to the caller 💖

if the field value consists of character data, the returned length will be without the terminating zero character. for binary values, the exact size of the block as stored in the database is returned 🧚

---

💀 ERRORS 💀

this function will also return zero if the result parameter is invalid or if the value of pos is out of range 🙈

bestie that's the whole note — zero can show up here when something's off, so don't let it catch you off guard 💅

---

🌈 SEE ALSO 🌈

• odbx_field_value()
• odbx_result()

---

mwah 💋 this little page is from the OpenDBX manual, dated 6 February 2026. odbx_field_length(3) out — slay and stay safe 🫶💖