Requires Java version 8 or greater. Hibernate ORM You will need hibernate-core Migration notes If you are upgrading an existing application from an earlier version of Hibernate Search to the latest release, make sure to check the out the migration guide.
Please read the disclaimer before reading this article. Finding textual data in a database is a very common scenario in applications. This article describes how you can implement a user-defined function UDF that integrates a commonly available library for regular expression matching with DB2.
By means of an example, the pcre library Perl-compatible regular expressions is used, but it can be replaced with any other library. Background This section describes what regular expressions are and why they are useful. What are regular expressions? Regular expressions are used to find and replace patterns in strings.
The regular expressions are defined using a grammar, and the regular expression engine takes the grammar and compares it with the string. The engine returns an indication of whether the string matches the grammar; that is, if the string contains substrings that can be derived from the grammar.
Additionally, the engine can also return the matching substrings. The term "pattern" is used to denote the grammar. A very basic pattern consists of only a single letter. A string that contain this letter is a "match" when compared with this pattern.
For example, if the pattern is "a," then the string "abcd" is a match, but the string "xyz" is not. The power of regular expressions stems from the predefined operators also called meta-characters that can express the patterns in a very short space.
Depending on the dialect and supported features, different meta-characters might be available. Generally, the following characters are available, among others: The regular expressions used in the programming language Perl support further abbreviations. The library that is used in this article implements those extensions.
As an excerpt, the following abbreviations, among others, are available in Perl's regular expression language: This pattern matches any string that contains a substring that consists of several upper-case letters, followed by a space, an equal sign, another space, and then either a single digit or the string "0x00".
The last character of that substring must be a semicolon. But those functions and operators are either restricted in their functionality for pattern matching, or they introduce complexity for the query in which they might be used. Here is a short excerpt of the available functions: LIKE predicates Basic pattern matching using wildcards.
Example scenario Let's define the following listing Listing 2 and insert several rows: As you can see, it is much easier to write the predicate for this pattern using a function than to express the same semantics using LIKE predicates.
The engine provides a C API to handle the patterns and perform the matching. The UDF consists of two pieces: The body of the function that implements a wrapper around the C API calls for the regular expression matching engine Listing 4 shows the SQL statement for creating the function.
The lengths of the parameters can be adapted to your needs.
The values I show here do not imply any recommendations. The second part consists of a small chunk of C code, which implements the UDF entry point.
This entry point is called by DB2 during the query execution for each row to be matched against the pattern. Listing 5 is an example what this code could look like. Comments start with a ' ', so the pattern is a ' ' sign followed by some non-empty text.Specifies a query string that retrieves Active Directory objects.
This string uses the PowerShell Expression Language syntax. The PowerShell Expression Language syntax provides rich type-conversion support for value types received by the Filter parameter. The syntax uses an in-order representation, which means that the operator is placed between the operand and the value.
PeopleSoft Query – Which Tables are Involved? by Apurva Tripathi on May 2, The full list of tables involved with PeopleSoft Query does change every now and the list below is good as of PeopleTools Some of the important PeopleSoft Query tables have been explained to begin with.
How to access SQL for a Private PS query of. Job Aid – PS Query: Creating a Query Page 2 Last Updated: 11/30/ Step Action 3.
Use the Records tab (aka table) to select the record(s) upon which to base the new query. If you know the name of the table you wish to use, enter it in the Search By field. In this post, I will give a list of all undocumented parameters in Oracle c. Here is a query to see all the parameters (documented and undocumented) which contain the string you enter when prompted.
Escape characters, Delimiters and Quotes. The PowerShell escape character is the grave-accent(`) The escape character can be used in three ways: 1) When used at the end of a line, it is a continuation character - so the command will continue on the next line.
PeopleSoft Query is a great way to retrieve information from PeopleSoft without having to write the complex SQL queries. However, as a PeopleSoft admin – there may be situations when you need to seek information from the PeopleSoft Query tables.