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Use existing schema when querying local data. #86

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merged 1 commit into from
Sep 2, 2022
Merged

Use existing schema when querying local data. #86

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12 changes: 11 additions & 1 deletion server/src/query.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -17,13 +17,15 @@
*/

use chrono::{DateTime, Utc};
use datafusion::arrow::datatypes::Schema;
use datafusion::arrow::record_batch::RecordBatch;
use datafusion::datasource::file_format::parquet::ParquetFormat;
use datafusion::datasource::listing::ListingOptions;
use datafusion::prelude::*;
use serde_json::Value;
use std::sync::Arc;

use crate::metadata::STREAM_INFO;
use crate::option::CONFIG;
use crate::storage;
use crate::storage::ObjectStorage;
Expand Down Expand Up @@ -92,6 +94,14 @@ impl Query {
target_partitions: 1,
};

let schema = &STREAM_INFO.schema(&self.stream_name)?;

if schema.is_empty() {
return Ok(());
}

let schema: Arc<Schema> = Arc::new(serde_json::from_str(schema)?);

ctx.register_listing_table(
&self.stream_name,
CONFIG
Expand All @@ -100,7 +110,7 @@ impl Query {
.to_str()
.unwrap(),
listing_options,
None,
Some(schema),
)
.await?;

Expand Down