Package dev.frostlake.executor

Class MergeRowShape

java.lang.Object

dev.frostlake.executor.MergeRowShape

public final class MergeRowShape
extends Object

The MERGE evaluation shape for one (source table, target table, aliases) combination: the merged __MERGE__ table exposing alias.col / tablename.col / bare-name slots, one ExpressionEvaluator over it, and the slot mapping that refills a values list per source/target row pair. Everything here is invariant per MERGE statement — it used to be rebuilt for every candidate PAIR (a fresh column list, Table (with its name-index map), and evaluator per pair, up to three cross-product passes deep).

Two modes mirror the two former builders exactly, slot for slot: the CONDITION shape (source qualified-only, target qualified + bare) and the VALUE shape (source additionally exposed under a __S__ bare prefix, and optionally re-exposed bare LAST so a WHEN-NOT-MATCHED insert resolves unqualified names to the SOURCE via the name index's last-wins rule).

Method Summary

Modifier and Type	Method	Description
static MergeRowShape	build(Table targetTable, Table sourceTable, String targetAlias, String sourceAlias, boolean valueMode, boolean unqualifiedFromSource, FunctionRegistry functionRegistry, Catalog catalog, QueryExecutor executor)
Object	evaluate(String expr, Row targetRow, Row sourceRow)	Evaluate expr over the merged row for this pair (refills only the values list).
Table	mergedTable()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

build

public static MergeRowShape build(Table targetTable,
 Table sourceTable,
 String targetAlias,
 String sourceAlias,
 boolean valueMode,
 boolean unqualifiedFromSource,
 FunctionRegistry functionRegistry,
 Catalog catalog,
 QueryExecutor executor)

evaluate

public Object evaluate(String expr,
 Row targetRow,
 Row sourceRow)

Evaluate expr over the merged row for this pair (refills only the values list).

mergedTable

public Table mergedTable()