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docs: update for template variables

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ref #9030
This commit is contained in:
Daniel Lee
2017-10-24 14:42:13 +02:00
parent 201e93b7f9
commit f48703502d
2 changed files with 10 additions and 2 deletions
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6
docs/sources/features/datasources/mysql.md
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@@ -142,7 +142,11 @@ SELECT hostname FROM my_host WHERE region IN($region)
### Using Variables in Queries
Template variables are quoted automatically so if it is a string value do not wrap them in quotes in where clauses. If the variable is a multi-value variable then use the `IN` comparison operator rather than `=` to match against multiple values.
From Grafana 4.3.0 to 4.6.0, template variables are always quoted automatically so if it is a string value do not wrap them in quotes in where clauses.
From Grafana 4.7.0, template variable values are only quoted when the template variable is a `multi-value`.
If the variable is a multi-value variable then use the `IN` comparison operator rather than `=` to match against multiple values.
There are two syntaxes:

6
docs/sources/features/datasources/postgres.md
View File

@@ -154,7 +154,11 @@ SELECT hostname FROM host WHERE region IN($region)
### Using Variables in Queries
Template variables are quoted automatically so if it is a string value do not wrap them in quotes in where clauses. If the variable is a multi-value variable then use the `IN` comparison operator rather than `=` to match against multiple values.
From Grafana 4.3.0 to 4.6.0, template variables are always quoted automatically so if it is a string value do not wrap them in quotes in where clauses.
From Grafana 4.7.0, template variable values are only quoted when the template variable is a `multi-value`.
If the variable is a multi-value variable then use the `IN` comparison operator rather than `=` to match against multiple values.
There are two syntaxes: