first commit

packages/nodes-base/nodes/Oracle/Sql/methods/resourceMapping.ts

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+import type { ILoadOptionsFunctions, ResourceMapperFields, FieldType } from 'n8n-workflow';
+
+import type { OracleDBNodeCredentials } from '../helpers/interfaces';
+import { getColumnMetaData, mapDbType } from '../helpers/utils';
+import { configureOracleDB } from '../transport';
+
+export async function getMappingColumns(
+	this: ILoadOptionsFunctions,
+): Promise<ResourceMapperFields> {
+	const credentials = await this.getCredentials<OracleDBNodeCredentials>('oracleDBApi');
+
+	const pool = await configureOracleDB.call(this, credentials);
+
+	const schema = this.getNodeParameter('schema', 0, {
+		extractValue: true,
+	}) as string;
+
+	const table = this.getNodeParameter('table', 0, {
+		extractValue: true,
+	}) as string;
+
+	const columns = await getColumnMetaData(this.getNode(), pool, schema, table);
+	const fields = columns.map((col) => {
+		const type = mapDbType(col.dataType).n8nType as FieldType;
+		const nullable = col.isNullable;
+		const hasDefault = col.columnDefault === 'YES';
+		const isGenerated = col.isGenerated === 'ALWAYS';
+
+		return {
+			id: col.columnName,
+			displayName: col.columnName,
+			required: !nullable && !hasDefault && !isGenerated,
+			display: true,
+			type,
+			defaultMatch: true,
+		};
+	});
+	return { fields };
+}