71 lines
1.7 KiB
Bash
Executable File
71 lines
1.7 KiB
Bash
Executable File
#!/bin/bash -ex
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# Tool for documenting sql with graphviz
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# Usage:
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# $ cat sql_file.sql | tools/doc_sql.sh -flags -passed -to -dot > output_file.svg
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# Outputs a subgraph and some edges that can be grouped togeather in a full graph
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flags=$@
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input_file=$(cat -)
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# First, find the table name
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table_name=$(echo "${input_file}" "SELECT name FROM sqlite_master WHERE type='table';" | sqlite3 | head -n 1)
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# And get the data we need to display
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table_schema=$(echo "${input_file}" "
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SELECT
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info.name,
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info.type,
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info.pk,
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info.\"notnull\",
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fk_from.\"from\" AS fk_from_col,
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fk_from.\"on_delete\" AS fk_on_delete,
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fk_from.\"table\" AS fk_from_tbl,
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fk_from.\"to\" AS fk_from_to
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FROM
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pragma_table_info('$table_name') info
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LEFT JOIN pragma_foreign_key_list('$table_name') fk_from
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ON fk_from.\"from\" = info.\"name\"
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ORDER BY
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info.\"notnull\" DESC
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;" | sqlite3 )
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table_pk_1=$(echo "$table_schema" | head -n 1)
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table_pk=$(echo "$table_schema" | head -n 1 | awk '
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BEGIN {FS="|"}
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{print $1}
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')
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#foreign_keys=$(echo "${input_file}" "pragma foreign_key_list('$table_name');" | sqlite3)
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echo "$table_name ["
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echo " shape=\"plaintext\""
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echo " label=<<table>"
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echo " <tr><td colspan=\"3\"><b>" $table_name "</b></td></tr>"
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echo "$table_schema" | awk '
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BEGIN {FS="|"}
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{
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if ($4)
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print "<tr><td port=\"" $1 "\">PK</td>";
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else if ($5)
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print "<tr><td port=\"" $1 "\">FK</td>";
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else
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print "<tr><td></td>";
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print "<td>" $1 "</td>";
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printf "<td";
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if($4)
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printf " port=\"" $1 "\">";
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else
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printf ">";
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if($2)
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print $2;
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else
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print $2 "ON DELETE CASCADE";
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print "</td></tr>";
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}'
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echo "</table>> ];"
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echo "$table_schema" | awk -v "table_name=$table_name" -v "table_pk=$table_pk" '
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BEGIN {FS="|"}
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{
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if ($5) {
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print table_name ":" $5 "->" $7 ":" $8 ;
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}
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}
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'
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