Oracle SQL Developer

Using the SQL Worksheetreph[eader]sav[e]sho[w]shu[tdown]spo[ol]startupstoretimi[ng]tti[tle]var[iable]Related TopicsUsing the SQL Worksheet1.6.2 Script RunnerThe script runner emulates a limited set of SQL*Plus features. If you do not haveSQL*Plus on your system, you can often enter SQL and SQL*Plus statements andexecute them by clicking the Run Script icon. The Script Output pane displays theoutput.The SQL*Plus features available in the script runner include @, @@, CONNECT, EXIT,QUIT, UNDEFINE, WHENEVER, and substitution variables. For example, to run ascript named c:\myscripts\mytest.sql, type @c:\myscripts\mytest in the Enter SQLStatement box, and click the drop-down next to the Execute Statement icon and selectRun Script.The following considerations apply to using the SQL Developer script runner:■ You cannot use bind variables. (The Execute SQL Statement feature does let youuse bind variables of type VARCHAR2, NUMBER, and DATE.)■■■■For substitution variables, the syntax &&variable assigns a permanent variablevalue, and the syntax &variable assigns a temporary (not stored) variable value.For EXIT and QUIT, commit is the default behavior, but you can specify rollback.In either case, the context is reset: for example, WHENEVER commandinformation and substitution variable values are cleared.DESCRIBE works for most, but not all, object types for which it is supported inSQL*Plus.For SQL*Plus commands that are not supported, a warning message is displayed.■ SQL*Plus comments are ignored.If you have SQL*Plus available on your system, you may want to use it instead of thescript runner. To start SQL*Plus from SQL Developer, click Tools and then SQL*Plus.For information about SQL*Plus, see Using SQL*Plus.Related TopicsUsing the SQL Worksheet1.6.3 Execution PlanThe Execute Explain Plan icon generates the execution plan, which you can see byclicking the Explain tab. The execution plan is the sequence of operations that will beperformed to execute the statement. An execution plan shows a row source tree withthe hierarchy of operations that make up the statement. For each operation, it showsthe ordering of the tables referenced by the statement, access method for each tableSQL Developer Concepts and Usage 1-19