DeriveColumnNamesFromTags extracts column names from a struct's tags.

GenerateRandomInt64Id generates a random 64-bit ID.

NewDbShardManager is a constructor that ensures the inner map is always initialized.

NewPreparedStatement creates a new prepared statement.

StructsToRows converts a slice of structs to a [][]interface{} for use with pgx.CopyFromRows.

ConnConfig represents the configuration required for database connection.

MasterReplicaManager manages master and read replica instances.

PreparedStatement represents a prepared statement query.

PreparedStatementsMap represents a map of DbShard and their respective prepared statements.

ShardManager manages a pool of database shards, keeping them in a map.

Batch defines the interface for managing a batch of SQL statements to be executed within a transaction.

InstanceManager defines a contract for managing database connections and executing queries within a database instance.

RowConvertibleEntity defines an interface for converting a struct into a row of values for database insertion.

Transaction defines the interface for managing database transactions.

DbShard represents the shard instance key.