40 lines
2.2 KiB
Java
40 lines
2.2 KiB
Java
import java.io.FileInputStream;
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import java.sql.*;
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import java.util.Properties;
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public class FkPairs {
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public static void main(String[] args) throws Exception {
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Properties props = new Properties();
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try (FileInputStream in = new FileInputStream(args[0])) { props.load(in); }
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try (Connection conn = DriverManager.getConnection(props.getProperty("url"), props.getProperty("username"), props.getProperty("password"))) {
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String sql =
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"SELECT OBJECT_NAME(fk.parent_object_id) AS parent_table, " +
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" OBJECT_NAME(fk.referenced_object_id) AS ref_table, " +
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" fk.name AS fk_name, " +
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" STRING_AGG(pc.name + ' -> ' + rc.name, ', ') WITHIN GROUP (ORDER BY fkc.constraint_column_id) AS cols " +
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"FROM sys.foreign_keys fk " +
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"JOIN sys.foreign_key_columns fkc ON fkc.constraint_object_id = fk.object_id " +
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"JOIN sys.columns pc ON pc.object_id = fk.parent_object_id AND pc.column_id = fkc.parent_column_id " +
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"JOIN sys.columns rc ON rc.object_id = fk.referenced_object_id AND rc.column_id = fkc.referenced_column_id " +
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"WHERE fk.parent_object_id <> fk.referenced_object_id " +
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"GROUP BY fk.name, fk.parent_object_id, fk.referenced_object_id " +
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"ORDER BY parent_table, fk_name";
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try (Statement st = conn.createStatement(); ResultSet rs = st.executeQuery(sql)) {
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System.out.println("=== CROSS-TABLE FK ASSOCIATIONS (two tables linked) ===");
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String curPair = "";
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int n = 0;
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while (rs.next()) {
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String pair = rs.getString("parent_table") + " -> " + rs.getString("ref_table");
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if (!pair.equals(curPair)) {
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curPair = pair;
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n++;
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System.out.println();
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System.out.println("[" + n + "] " + pair);
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}
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System.out.println(" FK " + rs.getString("fk_name") + " ( " + rs.getString("cols") + " )");
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}
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}
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}
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}
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}
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