concept

CH table metadata: archives_i90.phf

PHF1..PHF7 — Programa Horario Final (intra-day market sessions 1..7). Multi-source table: one CH table for all PHF sub-programs, distinguished by the `program` value (PHF1, PHF2, ..., PHF7). Don't filter `WHERE program='PHF'` — that won't match anything; use the sub-program names.

# `archives_i90.phf` PHF1..PHF7 — Programa Horario Final (intra-day market sessions 1..7). Multi-source table: one CH table for all PHF sub-programs, distinguished by the `program` value (PHF1, PHF2, ..., PHF7). Don't filter `WHERE program='PHF'` — that won't match anything; use the sub-program names.