Module prom_row_builder 

Prometheus row-level helpers for converting proto Rows into Arrow RecordBatches and aligning / normalizing their schemas against existing table schemas in the catalog.

Functions

build_arrow_array 🔒

Build a single Arrow array for the given column index from proto Rows.

build_prom_create_table_schema_from_proto

Build a Vec<ColumnSchema> suitable for creating a new Prometheus logical table directly from the proto rows.schema, avoiding the round-trip through Arrow schema.

identify_missing_columns_from_proto 🔒

Identify tag columns in the proto rows_schema that are absent from the target region schema, without building an intermediate RecordBatch.

rows_to_aligned_record_batch 🔒

Directly converts proto Rows into a RecordBatch aligned to the given target_schema, handling Prometheus column renaming (timestamp/value), reordering, type casting, and null-filling in a single pass.

unzip_logical_region_schema 🔒

Extract timestamp, field, and tag column names from a logical region schema.