@struktoai/mirage-core/dist/core/lancedb/query.js

A Unified Virtual Filesystem For AI Agents

// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
// ========= Copyright 2026 @ Strukto.AI All Rights Reserved. =========
import { openStreamSync } from "../../rs/stream.js";
const DECODER = new TextDecoder();
/** Render an equality with Rust's shared Lance SQL quoting. */
export function eqClause(column, value) {
    const stream = openStreamSync('lance_query', { op: 'equal', column, value });
    try {
        return DECODER.decode(stream.finish());
    }
    finally {
        stream.close();
    }
}
/** Render group filters and a literal name prefix in Lance SQL. */
export function predicate(column, filters, prefix) {
    const stream = openStreamSync('lance_query', {
        op: 'predicate',
        column,
        filters: Object.entries(filters),
        prefix,
    });
    try {
        return DECODER.decode(stream.finish());
    }
    finally {
        stream.close();
    }
}
/** Render the filter for string columns holding one of the ASCII text needles. */
export function holdingClause(columns, texts, ignoreCase, filters) {
    const stream = openStreamSync('lance_query', {
        op: 'holding',
        columns: [...columns],
        texts: [...texts],
        ignore_case: ignoreCase,
        filters: Object.entries(filters),
    });
    try {
        return DECODER.decode(stream.finish());
    }
    finally {
        stream.close();
    }
}
/**
 * The string columns of a table's card, or null when a column the card
 * renders is neither a string nor a scalar. Mirrors Python's `text_columns`.
 */
export function textColumns(accessor, table, skipped) {
    return accessor.driver.textColumns(table, skipped);
}
/**
 * Every row the clause keeps, `columns` selected, or null when more than
 * `limit` do. Mirrors Python's `rows_where`.
 */
export async function rowsWhere(accessor, table, clause, columns, limit) {
    const rows = await accessor.driver.rowsWhere(table, clause, columns, limit + 1);
    return rows.length <= limit ? rows : null;
}
export async function tableExists(accessor, name) {
    return (await accessor.driver.listTables()).includes(name);
}
export async function searchRows(accessor, table, query, limit) {
    return accessor.searches.get(JSON.stringify([table, query, limit]), () => accessor.driver.search(table, query, limit));
}
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