# Class HV — Foreign Data Wrapper Error (SQL/MED)

> Members and evidence boundaries for PostgreSQL SQLSTATE class HV.
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# Class HV — Foreign Data Wrapper Error (SQL/MED)

## Shared meaning {#meaning}

The first two characters `HV` identify `Foreign Data Wrapper Error (SQL/MED)`. A SQL/MED foreign data wrapper operation failed. A class gives a directory-level family; each member still needs its own message, transaction aftermath, and response evidence.

## Members {#members}

The locked catalogue contains 27 members in this class:

[`HV000`](../../hv000/), [`HV001`](../../hv001/), [`HV002`](../../hv002/), [`HV004`](../../hv004/), [`HV005`](../../hv005/), [`HV006`](../../hv006/), [`HV007`](../../hv007/), [`HV008`](../../hv008/), [`HV009`](../../hv009/), [`HV00A`](../../hv00a/), [`HV00B`](../../hv00b/), [`HV00C`](../../hv00c/), [`HV00D`](../../hv00d/), [`HV00J`](../../hv00j/), [`HV00K`](../../hv00k/), [`HV00L`](../../hv00l/), [`HV00M`](../../hv00m/), [`HV00N`](../../hv00n/), [`HV00P`](../../hv00p/), [`HV00Q`](../../hv00q/), [`HV00R`](../../hv00r/), [`HV010`](../../hv010/), [`HV014`](../../hv014/), [`HV021`](../../hv021/), [`HV024`](../../hv024/), [`HV090`](../../hv090/), [`HV091`](../../hv091/)

## Version boundary {#versions}

Member links lead to their own versioned facts; consult the version pages and source evidence for exact presence and change boundaries.

## Sources {#sources}

Members are generated from `data/classes.json` and the locked SQLSTATE directory.