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new f0728e9c81 Update tableinput.adoc
new 30e9f43785 Merge pull request #3224 from Mattang-Dan/patch-13
f0728e9c81 is described below
commit f0728e9c815c6f225b6b8ff282b63717fd893231
Author: Mattang-Dan <[email protected]>
AuthorDate: Thu Sep 14 05:05:04 2023 -0700
Update tableinput.adoc
Updated Description, Tips, and Parameterized Query Examples
---
.../ROOT/pages/pipeline/transforms/tableinput.adoc | 52 +++++++++++++++-------
1 file changed, 37 insertions(+), 15 deletions(-)
diff --git
a/docs/hop-user-manual/modules/ROOT/pages/pipeline/transforms/tableinput.adoc
b/docs/hop-user-manual/modules/ROOT/pages/pipeline/transforms/tableinput.adoc
index 32a708c55f..0f4e7b3bac 100644
---
a/docs/hop-user-manual/modules/ROOT/pages/pipeline/transforms/tableinput.adoc
+++
b/docs/hop-user-manual/modules/ROOT/pages/pipeline/transforms/tableinput.adoc
@@ -25,11 +25,45 @@ under the License.
|
== Description
-The Table Input transform is used to read information from a database, using a
connection and SQL.
+The Table Input transform is used to read information from a database, using a
connection and SQL. Basic SQL statements can be generated automatically by
clicking Get SQL select statement. SQL queries can be parameterized through
variables and can accept input from previous transform fields.
-Basic SQL statements can be generated automatically by clicking Get SQL select
statement.
+Table input does not pass input data to the output, only fields inside the
query are returned to the pipeline so all other variables and data will be
lost. You can solve this by adding the variable as a field in the query or put
a Get variables transform behind the table input.
-SQL queries can be parameterized through variables and can accept input from
previous transform fields.
+To use data fields from a transform, you will have to select it in the
dropdown "Insert data from transform". Note that if you are using a
parametrized query using question marks, you must limit the stream to exactly
the fields you need as input to the table input. This can also be done with a
Select values transform.
+
+== Tips
+
+If you are getting unexpected query results, (and on some other
action/transforms) there is a clear database cache icon (broom). Or you can use
the Hop menu icon: Tools / Clear DB Cache.
+
+A cartesian join transform will combine a different number of fields from
multiple table inputs without requiring key join fields.
+
+== Parmeterized Query Examples
+
+*Example to use data row field(s) parameterized query:*
+
+``Select * from table1 where NameId = ? and AddressId = ?``
+
+* Replace variables in script: unchecked
+
+* Insert data from transform: <point to the transform with the fields>
+
+
+*Example to use a variable value parameterized query*:
+
+This examples uses an integer. If you were using a string you most likely will
have to use syntax ‘${PRM_NAME}’
+
+``Select * from table1 where id = ${myId}``
+
+* Replace variables in script: checked
+
+* Insert data from transform: <empty>
+
+
+*Example using a date range*:
+
+``SELECT * FROM customers WHERE changed_date BETWEEN ? AND ?``
+
+This SQL statement requests two calendar dates, to create a range, that are
read from the Insert data from transform option. The target date range can be
provided using the Get System Info transform. For example, if you want to read
all customers that have had their data changed yesterday, you can get a target
range for yesterday and read the customer data.
|
== Supported Engines
@@ -59,15 +93,3 @@ The locator where Hop inserts information is indicated with
a question mark: ?.
|Execute for each row?|Enable to perform the data insert for each individual
row.
|Limit size|Sets the number of lines that is read from the database; zero (0)
means read all lines.
|===
-
-== Example
-
-Below is a SQL statement:
-
-``
-SELECT * FROM customers WHERE changed_date BETWEEN ? AND ?
-``
-
-This SQL statement requests two calendar dates, to create a range, that are
read from the Insert data from transform option.
-The target date range can be provided using the Get System Info transform.
-For example, if you want to read all customers that have had their data
changed yesterday, you can get a target range for yesterday and read the
customer data.
\ No newline at end of file
