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55 lines
1.6 KiB
Perl
Executable File
55 lines
1.6 KiB
Perl
Executable File
#!/usr/bin/env perl
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package parquet_create_table_columns;
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use strict;
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no warnings 'experimental';
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use feature 'signatures';
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use JSON::XS;
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#use Data::Dumper;
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sub file_read($file) {
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open my $f, '<', $file or return;
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local $/ = undef;
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my $ret = <$f>;
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close $f;
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return $ret;
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}
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our $type_parquet_logical_to_clickhouse = {
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DECIMAL => 'Decimal128(1)',
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TIMESTAMP_MICROS => 'DateTime',
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TIMESTAMP_MILLIS => 'DateTime',
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};
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our $type_parquet_physical_to_clickhouse = {
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BOOLEAN => 'UInt8',
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INT32 => 'Int32',
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INT64 => 'Int64',
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FLOAT => 'Float32',
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DOUBLE => 'Float64',
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BYTE_ARRAY => 'String',
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FIXED_LEN_BYTE_ARRAY => 'String', # Maybe FixedString?
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INT96 => 'Int64', # TODO!
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};
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sub columns ($json) {
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my @list;
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my %uniq;
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for my $column (@{$json->{Columns}}) {
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#warn Data::Dumper::Dumper $column;
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my $name = $column->{'Name'};
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my $type = $type_parquet_logical_to_clickhouse->{$column->{'LogicalType'}} || $type_parquet_physical_to_clickhouse->{$column->{'PhysicalType'}};
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unless ($type) {
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warn "Unknown type [$column->{'PhysicalType'}:$column->{'LogicalType'}] of column [$name]";
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}
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$type = "Nullable($type)";
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$name .= $column->{'Id'} if $uniq{$name}++; # Names can be non-unique
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push @list, {name => $name, type => $type};
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}
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print join ', ', map {"`$_->{name}` $_->{type}"} @list;
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}
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sub columns_file ($file) {
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return columns(JSON::XS::decode_json(file_read($file)));
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}
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columns_file(shift) unless caller;
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