[DERBY-6273] NullPointerException when using more than one parameter in COALESCE

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 10.10.1.1
• Fix Version/s: 10.8.3.3, 10.9.2.2, 10.10.2.0, 10.11.1.1
• Component/s: SQL
• Urgency: Normal
• Issue & fix info: Repro attached
• Assignee: Knut Anders Hatlen
• Reporter: Knut Anders Hatlen
• Created: 24/Jun/13 09:46
• Updated: 21/Jan/15 00:23
• Resolved: 26/Jun/13 16:31

Description

Calls to COALESCE fail with NullPointerExceptions if there are multiple ? parameters:

ij version 10.10
ij> connect 'jdbc:derby:memory:db;create=true';
ij> prepare ps as 'values coalesce(?,?,1)';
ERROR XJ001: Java exception: ': java.lang.NullPointerException'. (errorCode = 0)

java.lang.NullPointerException
at org.apache.derby.impl.sql.compile.ParameterNode.generateExpression(Unknown Source)
at org.apache.derby.impl.sql.compile.CoalesceFunctionNode.generateExpression(Unknown Source)
at org.apache.derby.impl.sql.compile.ResultColumn.generateExpression(Unknown Source)
at org.apache.derby.impl.sql.compile.ResultColumnList.generateCore(Unknown Source)
at org.apache.derby.impl.sql.compile.ResultColumnList.generate(Unknown Source)
at org.apache.derby.impl.sql.compile.RowResultSetNode.generate(Unknown Source)
at org.apache.derby.impl.sql.compile.ScrollInsensitiveResultSetNode.generate(Unknown Source)
at org.apache.derby.impl.sql.compile.CursorNode.generate(Unknown Source)
at org.apache.derby.impl.sql.compile.StatementNode.generate(Unknown Source)
at org.apache.derby.impl.sql.GenericStatement.prepMinion(Unknown Source)
at org.apache.derby.impl.sql.GenericStatement.prepare(Unknown Source)
at org.apache.derby.impl.sql.conn.GenericLanguageConnectionContext.prepareInternalStatement(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement.<init>(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement20.<init>(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement30.<init>(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedPreparedStatement40.<init>(Unknown Source)
at org.apache.derby.jdbc.Driver40.newEmbedPreparedStatement(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
at org.apache.derby.impl.jdbc.EmbedConnection.prepareStatement(Unknown Source)
at org.apache.derby.impl.tools.ij.ij.PrepareStatement(Unknown Source)
at org.apache.derby.impl.tools.ij.ij.ijStatement(Unknown Source)
at org.apache.derby.impl.tools.ij.utilMain.runScriptGuts(Unknown Source)
at org.apache.derby.impl.tools.ij.utilMain.go(Unknown Source)
at org.apache.derby.impl.tools.ij.Main.go(Unknown Source)
at org.apache.derby.impl.tools.ij.Main.mainCore(Unknown Source)
at org.apache.derby.impl.tools.ij.Main.main(Unknown Source)
at org.apache.derby.tools.ij.main(Unknown Source)

Issue Links

• relates to: DERBY-6289 Derby 10.8 backport issue (summer 2013)