diff -r 5dcff3c35462 -r 2cc2d3f658f4 src/TabularPrefetchingHandler.h
--- a/src/TabularPrefetchingHandler.h	Mon Jun 20 00:15:08 2022 +0200
+++ b/src/TabularPrefetchingHandler.h	Mon Jun 20 00:55:56 2022 +0200
@@ -28,6 +28,7 @@
 #include <relpipe/reader/TypeId.h>
 #include <relpipe/reader/handlers/RelationalReaderStringHandler.h>
 #include <relpipe/reader/handlers/AttributeMetadata.h>
+#include <relpipe/reader/RelpipeReaderException.h>
 
 #include "Configuration.h"
 
@@ -138,13 +139,7 @@
 		return width;
 	}
 
-	void printHorizontalLine(const string_t &left, const string_t &middle, const string_t &right) {
-		const string_t bar = L"─";
-		// TODO: support also ASCII nostalgia:
-		// border = border.replaceAll("─", "-");
-		// border = border.replaceAll("│", "|");
-		// border = border.replaceAll("[╭┬╮├┼┤╰┴╯]", "+");
-
+	void printHorizontalLine(const string_t& left, const string_t& middle, const string_t& right, const string_t& bar) {
 		output << INDENT << ESC_BORDER;
 		output << convertor.to_bytes(left);
 		for (size_t c = 0; c < columnCount; c++) {
@@ -168,25 +163,43 @@
 			paddings[i] = columnWidths[i] - minWidth;
 		}
 
-		printHorizontalLine(L"╭", L"┬", L"╮");
+		if (configuration.tableStyle == Configuration::TableStyle::Rounded) printHorizontalLine(L"╭", L"┬", L"╮", L"─");
+		else if (configuration.tableStyle == Configuration::TableStyle::Sharp) printHorizontalLine(L"┌", L"┬", L"┐", L"─");
+		else if (configuration.tableStyle == Configuration::TableStyle::SharpDouble) printHorizontalLine(L"╔", L"╦", L"╗", L"═");
+		else if (configuration.tableStyle == Configuration::TableStyle::HorizontalOnly) printHorizontalLine(L"─", L"─", L"─", L"─");
+		else if (configuration.tableStyle == Configuration::TableStyle::Ascii) printHorizontalLine(L"+", L"+", L"+", L"-");
+		else throw RelpipeReaderException(L"Unsupported TableStyle: " + std::to_wstring((int) configuration.tableStyle));
+
+		std::string verticalSeparator;
+		if (configuration.tableStyle == Configuration::TableStyle::Rounded) verticalSeparator = "│";
+		else if (configuration.tableStyle == Configuration::TableStyle::Sharp) verticalSeparator = "│";
+		else if (configuration.tableStyle == Configuration::TableStyle::SharpDouble) verticalSeparator = "║";
+		else if (configuration.tableStyle == Configuration::TableStyle::HorizontalOnly) verticalSeparator = " ";
+		else if (configuration.tableStyle == Configuration::TableStyle::Ascii) verticalSeparator = "|";
+		else throw RelpipeReaderException(L"Unsupported TableStyle: " + std::to_wstring((int) configuration.tableStyle));
 
 		// Print column headers:
-		output << INDENT << ESC_BORDER << "│" << ESC_RESET;
+		output << INDENT << ESC_BORDER << verticalSeparator << ESC_RESET;
 		for (size_t i = 0; i < columnCount; i++) {
 			output << " " << convertor.to_bytes(formatValue(columnNames[i], ESC_HEADER));
 			for (integer_t p = 0; p < paddings[i]; p++) {
 				output << " ";
 			}
 			if (getConfiguration(writeTypes)) output << " (" << convertor.to_bytes(columnTypeCodes[i]) << ")";
-			output << ESC_BORDER << " │" << ESC_RESET;
+			output << ESC_BORDER << " " << verticalSeparator << ESC_RESET;
 		}
 		output << std::endl;
-		printHorizontalLine(L"├", L"┼", L"┤");
+		if (configuration.tableStyle == Configuration::TableStyle::Rounded) printHorizontalLine(L"├", L"┼", L"┤", L"─");
+		else if (configuration.tableStyle == Configuration::TableStyle::Sharp) printHorizontalLine(L"├", L"┼", L"┤", L"─");
+		else if (configuration.tableStyle == Configuration::TableStyle::SharpDouble) printHorizontalLine(L"╠", L"╬", L"╣", L"═");
+		else if (configuration.tableStyle == Configuration::TableStyle::HorizontalOnly) printHorizontalLine(L"─", L"─", L"─", L"─");
+		else if (configuration.tableStyle == Configuration::TableStyle::Ascii) printHorizontalLine(L"+", L"+", L"+", L"-");
+		else throw RelpipeReaderException(L"Unsupported TableStyle: " + std::to_wstring((int) configuration.tableStyle));
 
 		// Print particular rows:
 		for (size_t i = 0; i < values.size(); i++) {
 			integer_t columnIndex = i % columnCount;
-			if (columnIndex == 0) output << INDENT << ESC_BORDER << "│" << ESC_RESET;
+			if (columnIndex == 0) output << INDENT << ESC_BORDER << verticalSeparator << ESC_RESET;
 			string_t stringValue = values[i];
 			integer_t padding = columnWidths[columnIndex] - computeWidth(stringValue);
 			boolean_t alignRight = columnTypes[columnIndex] == TypeId::BOOLEAN || columnTypes[columnIndex] == TypeId::INTEGER;
@@ -195,10 +208,15 @@
 			output << " " << convertor.to_bytes(formatValue(stringValue, ESC_VALUE));
 			if (!alignRight) for (integer_t p = 0; p < padding; p++) output << " ";
 
-			output << ESC_BORDER << " │" << ESC_RESET;
+			output << ESC_BORDER << " " << verticalSeparator << ESC_RESET;
 			if (columnIndex == (columnCount - 1)) output << std::endl;
 		}
-		printHorizontalLine(L"╰", L"┴", L"╯");
+		if (configuration.tableStyle == Configuration::TableStyle::Rounded) printHorizontalLine(L"╰", L"┴", L"╯", L"─");
+		else if (configuration.tableStyle == Configuration::TableStyle::Sharp) printHorizontalLine(L"└", L"┴", L"┘", L"─");
+		else if (configuration.tableStyle == Configuration::TableStyle::SharpDouble) printHorizontalLine(L"╚", L"╩", L"╝", L"═");
+		else if (configuration.tableStyle == Configuration::TableStyle::HorizontalOnly) printHorizontalLine(L"─", L"─", L"─", L"─");
+		else if (configuration.tableStyle == Configuration::TableStyle::Ascii) printHorizontalLine(L"+", L"+", L"+", L"-");
+		else throw RelpipeReaderException(L"Unsupported TableStyle: " + std::to_wstring((int) configuration.tableStyle));
 
 		if (getConfiguration(writeRecordCount)) {
 			integer_t recordCount = values.size() / columnCount;