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OpenSearch/docs/reference/sql/language/syntax/commands/show-columns.asciidoc

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[DOCS] Move sql to docs (#31474)
2018-06-22 18:40:25 -04:00
[role="xpack"]
[testenv="basic"]
[DOCS] Significantly improve SQL docs Introduce SQL commands Move reserved keywords into an appendix Add section on security Introduce concepts section
2018-06-20 14:40:13 -04:00
[[sql-syntax-show-columns]]
=== SHOW COLUMNS
.Synopsis
[source, sql]
----
SQL: Show/desc commands now support table ids (#33363) Extend SHOW TABLES, DESCRIBE and SHOW COLUMNS to support table identifiers not just SQL LIKE pattern. This allows both Elasticsearch-style multi-index patterns and SQL LIKE. To disambiguate between the two (as the " vs ' can be easy to miss), the grammar now requires LIKE keyword as a prefix for all LIKE-like patterns. Also added some docs comparing the two types of patterns. Fix #33294
2018-09-04 09:54:10 -04:00
SHOW COLUMNS [ FROM | IN ]? [ table identifier<1> | [ LIKE pattern<2> ] ]
[DOCS] Significantly improve SQL docs Introduce SQL commands Move reserved keywords into an appendix Add section on security Introduce concepts section
2018-06-20 14:40:13 -04:00
----
SQL: Show/desc commands now support table ids (#33363) Extend SHOW TABLES, DESCRIBE and SHOW COLUMNS to support table identifiers not just SQL LIKE pattern. This allows both Elasticsearch-style multi-index patterns and SQL LIKE. To disambiguate between the two (as the " vs ' can be easy to miss), the grammar now requires LIKE keyword as a prefix for all LIKE-like patterns. Also added some docs comparing the two types of patterns. Fix #33294
2018-09-04 09:54:10 -04:00
<1> single table identifier or double quoted es multi index
<2> SQL LIKE pattern
DOCS: Fix anchor and example typos
2018-09-04 12:05:21 -04:00
See <<sql-index-patterns, index patterns>> for more information about
SQL: Show/desc commands now support table ids (#33363) Extend SHOW TABLES, DESCRIBE and SHOW COLUMNS to support table identifiers not just SQL LIKE pattern. This allows both Elasticsearch-style multi-index patterns and SQL LIKE. To disambiguate between the two (as the " vs ' can be easy to miss), the grammar now requires LIKE keyword as a prefix for all LIKE-like patterns. Also added some docs comparing the two types of patterns. Fix #33294
2018-09-04 09:54:10 -04:00
patterns.
[DOCS] Significantly improve SQL docs Introduce SQL commands Move reserved keywords into an appendix Add section on security Introduce concepts section
2018-06-20 14:40:13 -04:00
.Description
List the columns in table and their data type (and other attributes).
DOC: Add examples to the SQL docs (#31633) Significantly improve the example snippets in the documentation. The examples are part of the test suite and checked nightly. To help readability, the existing dataset was extended (test_emp renamed to emp plus library). Improve output of JDBC tests to be consistent with the CLI Add lenient flag to JDBC asserts to allow type widening (a long is equivalent to a integer as long as the value is the same).
2018-07-03 09:56:31 -04:00
["source","sql",subs="attributes,callouts,macros"]
----
include-tagged::{sql-specs}/docs.csv-spec[showColumns]
----
SQL: Show/desc commands now support table ids (#33363) Extend SHOW TABLES, DESCRIBE and SHOW COLUMNS to support table identifiers not just SQL LIKE pattern. This allows both Elasticsearch-style multi-index patterns and SQL LIKE. To disambiguate between the two (as the " vs ' can be easy to miss), the grammar now requires LIKE keyword as a prefix for all LIKE-like patterns. Also added some docs comparing the two types of patterns. Fix #33294
2018-09-04 09:54:10 -04:00