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40fb17791e
Commit the whole ./lib/ folder which stores the Crystal dependencies. This has a few benefits: - Allows to build the project without a connection to the Internet to retrieve dependencies. - Makes the project resistant against dependency re-tags which might include malicious code.
73 lines
1.8 KiB
Crystal
Executable File
73 lines
1.8 KiB
Crystal
Executable File
#!/usr/bin/env crystal
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require "readline"
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require "../src/pg"
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url = ARGV[0]? || "postgres:///"
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db = DB.open(url)
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loop do
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query = Readline.readline("# ", true) || ""
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has_results = false
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begin
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db.query(query) do |rs|
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has_results = rs.column_count > 0
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if has_results
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# Gather rows, including a first row for the column names
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rows = [] of Array(typeof(rs.read))
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# The first row: column names
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rows << rs.column_count.times.map { |i| rs.column_name(i).as(typeof(rs.read)) }.to_a
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# The result rows
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rs.each do
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rows << rs.column_count.times.map { rs.read }.to_a
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end
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# Compute maximum sizes for each column for a nicer output
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sizes = [] of Int32
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rs.column_count.times do |i|
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# Add 2 for padding
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sizes << rows.max_of(&.[i].to_s.size.+(2))
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end
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# Print rows
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rows.each_with_index do |row, row_index|
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row.each_with_index do |value, col_index|
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print " |" if col_index > 0
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print " "
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col_size = sizes[col_index] - 2
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case value
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when Int, Float, PG::Numeric
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print value.to_s.rjust(col_size)
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else
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print value.to_s.ljust(col_size)
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end
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end
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# Write the separator ("---+---+---") after the first row
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if row_index == 0
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puts
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row.each_index do |col_index|
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print "+" if col_index > 0
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print "-" * sizes[col_index]
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end
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end
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puts
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end
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# Print numbers of rows
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count = rows.size - 1
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if count == 1
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puts "(1 row)"
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else
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puts "(#{count} rows)"
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end
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end
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end
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rescue e
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puts "ERROR: #{e.message}"
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end
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puts if has_results
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end
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