crates/paimon/src/table/write_builder.rs

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//! WriteBuilder for table write API.
//!
//! Reference: [pypaimon WriteBuilder](https://github.com/apache/paimon/blob/master/paimon-python/pypaimon/write/write_builder.py)

use crate::table::{Table, TableCommit, TableWrite};
use uuid::Uuid;

/// Builder for creating table writers and committers.
///
/// Provides `new_write` and `new_commit` methods, with optional
/// `overwrite` support for partition-level overwrites.
pub struct WriteBuilder<'a> {
    table: &'a Table,
    commit_user: String,
}

impl<'a> WriteBuilder<'a> {
    pub fn new(table: &'a Table) -> Self {
        Self {
            table,
            commit_user: Uuid::new_v4().to_string(),
        }
    }

    /// Create a new TableCommit for committing write results.
    pub fn new_commit(&self) -> TableCommit {
        TableCommit::new(self.table.clone(), self.commit_user.clone())
    }

    /// Create a new TableWrite for writing Arrow data.
    ///
    /// For primary-key tables, sequence numbers are lazily scanned per partition
    /// when the first writer for that partition is created.
    pub fn new_write(&self) -> crate::Result<TableWrite> {
        TableWrite::new(self.table, self.commit_user.clone())
    }
}