Extract multiple line text from log between special words
Hi all,
I have a text file (log), it prints some SQL statements in the log. It is a bit irregular, I need to extract SQL statement into as separate file.
1. Some statements are printed as just SQL statements, in multiple lines.
2. Some SQL statements are printed line by line but after log details at the beginning of the line. So somehow I need to ignore the first part of the line but need to keep query.
What I found as a pattern is, all SQL statements have "DISTINCT" keyword in the beginning
and after each statement there are "quit;" statements.
This doesn't have to be at the beginning of the lines, it's enough for me to extract text between DISTINCT and quit.
This is where I confused and couldn't find a way to solve it with sed or awk.
hi,
I have few text templates
as a simple ex:
template 1
city Name:
zip code:
state Name:
template2:
employee Name:
Phone number:
I wish to grep on given text file and make sure the text file matches one of these templates. Please give your ideas. (6 Replies)
Hi..
How to search for multiple words in a single line using grep?.
Eg: Jack and Jill went up the hill
Jack and Jill were best friends
Humpty and Dumpty were good friends too
----------
I want to extract the 2nd statement(assuming there are several statements with... (11 Replies)
The file contains one line of text followed by a number. I want to take the number X at the end, take it out and display the last X words. X is the key telling me how many words from the end that I want and X will always be less than the number of words, so no problem there.
Example input and... (4 Replies)
Hi Guys,
Can someone help me with a way to extract text between two words on a single line.
For example if the file has below content I want to extract all text between b and f inclusive of b and f. Aparently sed does this but does it line by line and I guess it cannot read word by word.
... (11 Replies)
Hi again
I have figured out how to be able to sort through lines in a file with multiple words in any order and display them using this command:
cat file | grep -i $OPTION1 | grep -i $OPTION2 | grep -i $OPTION3 OPTION1 is 2008, OPTION2 is Mar, OPTION 3 is Tue
Result:
Tue Mar 25... (4 Replies)
I can't decide if I should use AWK or PERL after pouring over these forums for hours today I decided I'd post something and see if I couldn't get some advice.
I've got a text file full of hundreds of events in this format:
Record Number : 1
Records in Seq : ... (3 Replies)
Hi
I use sed comnand to remove occurance of one workd from a line.
However I need to removed occurance of dufferent words in ne line.
Original-1 Hi this is the END of my begining
Comand sed s/"END"/"start"/g
Output-1 Hi this is the start of my beginig
But I have more... (9 Replies)
Hi All
I have to search servers name say like 1000+ "unique names" line by line in child.txt files in another file that is a master file where all server present say "master.txt",if child.txt's server name matches with master files then it print yes else no with server name. (4 Replies)
hi I made this simple script to extract data and pretty much is a list and would like to extract data of two words separated by commas and I would like to make a new text file that would list these extracted data into a list and each in a new line.
Example that worked for me with text file... (5 Replies)
Discussion started by: dandaryll
5 Replies
LEARN ABOUT SUSE
prepare
PREPARE(7) SQL Commands PREPARE(7)NAME
PREPARE - prepare a statement for execution
SYNOPSIS
PREPARE name [ ( datatype [, ...] ) ] AS statement
DESCRIPTION
PREPARE creates a prepared statement. A prepared statement is a server-side object that can be used to optimize performance. When the PRE-
PARE statement is executed, the specified statement is parsed, rewritten, and planned. When an EXECUTE command is subsequently issued, the
prepared statement need only be executed. Thus, the parsing, rewriting, and planning stages are only performed once, instead of every time
the statement is executed.
Prepared statements can take parameters: values that are substituted into the statement when it is executed. When creating the prepared
statement, refer to parameters by position, using $1, $2, etc. A corresponding list of parameter data types can optionally be specified.
When a parameter's data type is not specified or is declared as unknown, the type is inferred from the context in which the parameter is
used (if possible). When executing the statement, specify the actual values for these parameters in the EXECUTE statement. Refer to EXECUTE
[execute(7)] for more information about that.
Prepared statements only last for the duration of the current database session. When the session ends, the prepared statement is forgotten,
so it must be recreated before being used again. This also means that a single prepared statement cannot be used by multiple simultaneous
database clients; however, each client can create their own prepared statement to use. The prepared statement can be manually cleaned up
using the DEALLOCATE [deallocate(7)] command.
Prepared statements have the largest performance advantage when a single session is being used to execute a large number of similar state-
ments. The performance difference will be particularly significant if the statements are complex to plan or rewrite, for example, if the
query involves a join of many tables or requires the application of several rules. If the statement is relatively simple to plan and re-
write but relatively expensive to execute, the performance advantage of prepared statements will be less noticeable.
PARAMETERS
name An arbitrary name given to this particular prepared statement. It must be unique within a single session and is subsequently used to
execute or deallocate a previously prepared statement.
datatype
The data type of a parameter to the prepared statement. If the data type of a particular parameter is unspecified or is specified as
unknown, it will be inferred from the context in which the parameter is used. To refer to the parameters in the prepared statement
itself, use $1, $2, etc.
statement
Any SELECT, INSERT, UPDATE, DELETE, or VALUES statement.
NOTES
In some situations, the query plan produced for a prepared statement will be inferior to the query plan that would have been chosen if the
statement had been submitted and executed normally. This is because when the statement is planned and the planner attempts to determine the
optimal query plan, the actual values of any parameters specified in the statement are unavailable. PostgreSQL collects statistics on the
distribution of data in the table, and can use constant values in a statement to make guesses about the likely result of executing the
statement. Since this data is unavailable when planning prepared statements with parameters, the chosen plan might be suboptimal. To exam-
ine the query plan PostgreSQL has chosen for a prepared statement, use EXPLAIN [explain(7)].
For more information on query planning and the statistics collected by PostgreSQL for that purpose, see the ANALYZE [analyze(7)] documenta-
tion.
You can see all available prepared statements of a session by querying the pg_prepared_statements system view.
EXAMPLES
Create a prepared statement for an INSERT statement, and then execute it:
PREPARE fooplan (int, text, bool, numeric) AS
INSERT INTO foo VALUES($1, $2, $3, $4);
EXECUTE fooplan(1, 'Hunter Valley', 't', 200.00);
Create a prepared statement for a SELECT statement, and then execute it:
PREPARE usrrptplan (int) AS
SELECT * FROM users u, logs l WHERE u.usrid=$1 AND u.usrid=l.usrid
AND l.date = $2;
EXECUTE usrrptplan(1, current_date);
Note that the data type of the second parameter is not specified, so it is inferred from the context in which $2 is used.
COMPATIBILITY
The SQL standard includes a PREPARE statement, but it is only for use in embedded SQL. This version of the PREPARE statement also uses a
somewhat different syntax.
SEE ALSO
DEALLOCATE [deallocate(7)], EXECUTE [execute(7)]
SQL - Language Statements 2010-05-14 PREPARE(7)