class

Memo::Dialect::SQLite

Inherits Memo::Dialect::Base < Reference < Object

Constants

SCHEMA_SQL = {{ read_file("/tmp/tmp.AcleAa/src/src/memo/dialect/../../../db/schema/memo_schema.sql") }}

Instance methods

column_exists?(db : DBHandle, table : String, column : String) : Bool
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db_file_path(db : DB::Database) : String | Nil

Get the database file path from a connection, if applicable.

SQLite: reads pragma_database_list PostgreSQL: returns nil (no local file)

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drop_legacy_texts(db : DBHandle) : Nil

Drop the tables content-addressed storage replaced (memo_texts and its full-text index).

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embedding_rowid_column

The column name for embedding row identity used as USearch key.

SQLite: "rowid" (implicit) PostgreSQL: "eid" (explicit column)

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fts_join_sql

memo_contents_fts is an external-content table: rows are keyed by the content's id, and MATCH looks them up without a second copy

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fts_where_sql

Build FTS WHERE clause for match queries.

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insert_or_ignore_sql(table : String, columns : String, placeholders : String) : String

Build INSERT OR IGNORE SQL.

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insert_returning_id(db : DBHandle, sql : String, *args) : Int64

Execute an INSERT and return the generated ID.

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lock_for_migration(db : DB::Connection) : Nil

BEGIN IMMEDIATE already holds the write lock

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prepare(db : DB::Database) : Nil

Databases from before 0.13: add content_id to memo_sources and memo_chunks, which the schema's indexes need. The transaction takes the write lock first (BEGIN IMMEDIATE), so a second process opening the database waits, then finds the columns there.

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schema_statements

Get schema DDL statements.

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table_exists?(db : DBHandle, table : String) : Bool
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upsert_sql(table : String, columns : String, placeholders : String, conflict_columns : String, update_columns : Array(String)) : String

Build upsert SQL (INSERT OR REPLACE equivalent).

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