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Do not create unnecessary statement when checking table

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This commit is contained in:
montlikadani 2021-01-14 22:43:42 +01:00
parent ba601dde43
commit 77295b6041
1 changed files with 7 additions and 17 deletions
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22
src/main/java/com/gamingmesh/jobs/dao/JobsMySQL.java
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@ -77,16 +77,10 @@ public class JobsMySQL extends JobsDAO {
@Override @Override
public boolean isTable(String table) { public boolean isTable(String table) {
Statement statement;
JobsConnection conn = getConnection(); JobsConnection conn = getConnection();
if (conn == null) if (conn == null)
return false; return false;
try {
statement = conn.createStatement();
} catch (SQLException e) {
Jobs.consoleMsg("&cCould not check if its table, SQLException: " + e.getMessage());
return false;
}
try { try {
ResultSet tables = conn.getMetaData().getTables(null, null, table, null); ResultSet tables = conn.getMetaData().getTables(null, null, table, null);
if (tables.next()) { if (tables.next()) {
@ -97,8 +91,8 @@ public class JobsMySQL extends JobsDAO {
return false; return false;
} catch (SQLException e) { } catch (SQLException e) {
Jobs.consoleMsg("Not a table |" + "SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME ='" + table + "';" + "|"); Jobs.consoleMsg("Not a table |" + "SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME ='" + table + "';" + "|");
close(statement);
} }
PreparedStatement insert = null; PreparedStatement insert = null;
ResultSet res = null; ResultSet res = null;
try { try {
@ -107,16 +101,15 @@ public class JobsMySQL extends JobsDAO {
if (res.next()) { if (res.next()) {
close(res); close(res);
close(insert); close(insert);
close(statement);
return true; return true;
} }
} catch (SQLException e) { } catch (SQLException e) {
Jobs.consoleMsg("Not a table |" + "SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME ='" + table + "';" + "|"); Jobs.consoleMsg("Not a table |" + "SELECT * FROM INFORMATION_SCHEMA.COLUMNS WHERE TABLE_NAME ='" + table + "';" + "|");
} finally { } finally {
}
close(res); close(res);
close(insert); close(insert);
close(statement); }
return false; return false;
} }
@ -169,8 +162,7 @@ public class JobsMySQL extends JobsDAO {
return false; return false;
} }
statement = getConnection().createStatement(); statement = getConnection().createStatement();
String query = "DELETE FROM " + table + ";"; statement.executeUpdate("DELETE FROM " + table + ";");
statement.executeUpdate(query);
return true; return true;
} catch (SQLException e) { } catch (SQLException e) {
Jobs.consoleMsg("&cCould not wipe table, SQLException: " + e.getMessage()); Jobs.consoleMsg("&cCould not wipe table, SQLException: " + e.getMessage());
@ -184,15 +176,13 @@ public class JobsMySQL extends JobsDAO {
@Override @Override
public boolean drop(String table) { public boolean drop(String table) {
Statement statement = null; Statement statement = null;
String query = null;
try { try {
if (!isTable(table)) { if (!isTable(table)) {
Jobs.consoleMsg("&cTable \"" + table + "\" does not exist."); Jobs.consoleMsg("&cTable \"" + table + "\" does not exist.");
return false; return false;
} }
statement = getConnection().createStatement(); statement = getConnection().createStatement();
query = "DROP TABLE IF EXISTS `" + table + "`;"; statement.executeUpdate("DROP TABLE IF EXISTS `" + table + "`;");
statement.executeUpdate(query);
return true; return true;
} catch (SQLException e) { } catch (SQLException e) {
Jobs.consoleMsg("&cCould not wipe table, SQLException: " + e.getMessage()); Jobs.consoleMsg("&cCould not wipe table, SQLException: " + e.getMessage());