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SDK - Patch re-ranking #1521

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Merged
SilasMarvin merged 2 commits into from
Jun 13, 2024
Merged

SDK - Patch re-ranking #1521

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e14c2c5
Patch non-rerank query to include a NULL fourth column
SilasMarvin Jun 13, 2024
ddd5073
Change rank_score to rerank_score
SilasMarvin Jun 13, 2024
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16 changes: 15 additions & 1 deletion pgml-sdks/pgml/src/vector_search_query_builder.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -326,7 +326,7 @@ pub async fn build_sqlx_query(
SIden::Str("chunk"),
SIden::Str("score"),
]);
query.expr_as(Expr::cust("(rank).score"), Alias::new("rank_score"));
query.expr_as(Expr::cust("(rank).score"), Alias::new("rerank_score"));

// Build the actual select statement sub query
let mut sub_query_rank_call = Query::select();
Expand Down Expand Up @@ -364,6 +364,20 @@ pub async fn build_sqlx_query(

query
} else {
// Wrap our query to return a fourth null column
let mut vector_search_cte = CommonTableExpression::from_select(query);
vector_search_cte.table_name(Alias::new(format!("{prefix}_vector_search")));
ctes.push(vector_search_cte);

let mut query = Query::select();
query
.columns([
SIden::Str("document"),
SIden::Str("chunk"),
SIden::Str("score"),
])
.expr_as(Expr::cust("NULL"), Alias::new("rerank_score"))
.from(SIden::String(format!("{prefix}_vector_search")));
query
};

Expand Down