Query plans always begin with this static injection. If static solutions to inject can be derived from the query itself by combining various sources of static bindings (for example, from VALUES or BIND clauses), then the SolutionInjection operator injects these derived static solutions. In the ...
Replace invalid characters with dashes, * so that for example "I/O Read Time" becomes "I-O-Read-Time". */static voidExplainXMLTag(const char *tagname, int flags, ExplainState *es){ const char *s; const char *valid = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_."; ...
A BOOL, (short for Boolean) is a true or false value. Explain understands two BOOL constants, TRUE and FALSE. Note that these values must be capitalized and may not be quoted ("TRUE" will be interpreted as a string). Don't confuse the BOOL data type with Boolean operators: and, or,...
The same example can be written in ANSI SQL as T1 LEFT OUTER JOIN T2 ON (T1.x = T2.x); Figure 21: Example plan output using OUTER JOIN. Note a join type is always matched with one of the join methods; in this case a hash join 15 THE ORACLE OPTIMIZER EXPLAIN THE EXPLAIN PLAN ...
Structured Query Language used to manipulate the data with help of queries. The SQL uses some operators to throw queries like SELECT uses to selects a data value and shown on the output screen, Where uses for conditions, Group by uses to...
In these cases you would probably have an in house DBA reviewing the changes in any case as the queries concerned will not be as simple as this example. Matthew 4 Aug 15 at 01:01 Hi!Thanks for providing such a great article. These are just basic things for dba’s but very powerful...
// Example 1 function sayHelloInFiveSeconds(name){ var prompt = "Hello, " + name + "!"; // Inner functions are put in the local scope by default, as if they were // declared with `var`. function inner(){ alert(prompt); } setTimeout(inner, 5000); // setTimeout is asynchronous...
The same example can be written in ANSI SQL as T1 LEFT OUTER JOIN T2 ON (T1.x = T2.x); Figure 21: Example plan output using OUTER JOIN. Note a join type is always matched with one of the join methods; in this case a hash join 15 THE ORACLE OPTIMIZER EXPLAIN THE EXPLAIN PLAN ...
The same example can be written in ANSI SQL as T1 LEFT OUTER JOIN T2 ON (T1.x = T2.x); Figure 21: Example plan output using OUTER JOIN. Note a join type is always matched with one of the join methods; in this case a hash join 15 THE ORACLE OPTIMIZER EXPLAIN THE EXPLAIN PLA...