holo-client/src/main/java/com/alibaba/hologres/client/impl/UnnestUpsertStatementBuilder.java [129:146]:
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		StringBuilder sb = new StringBuilder();
		sb.append("insert into ").append(tableName.getFullName());

		// 无论是与表中已有数据还是常量比较，都需要as重命名为old
		if (checkAndPutCondition != null) {
			sb.append(" as old ");
		}

		sb.append("(");
		first = true;
		set.stream().forEach((index) -> {
			if (!first) {
				sb.append(",");
			}
			first = false;
			sb.append(IdentifierUtil.quoteIdentifier(schema.getColumn(index).getName(), true));
		});
		sb.append(")");
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holo-client/src/main/java/com/alibaba/hologres/client/impl/UpsertStatementBuilder.java [163:180]:
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		StringBuilder sb = new StringBuilder();
		sb.append("insert into ").append(tableName.getFullName());

		// 无论是与表中已有数据还是常量比较，都需要as重命名为old
		if (checkAndPutCondition != null) {
			sb.append(" as old ");
		}

		sb.append("(");
		first = true;
		set.stream().forEach((index) -> {
			if (!first) {
				sb.append(",");
			}
			first = false;
			sb.append(IdentifierUtil.quoteIdentifier(schema.getColumn(index).getName(), true));
		});
		sb.append(")");
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