Repository: incubator-impala Updated Branches: refs/heads/doc_prototype df2755d76 -> 4303a448a
Updating some outdated introductory wording. Project: http://git-wip-us.apache.org/repos/asf/incubator-impala/repo Commit: http://git-wip-us.apache.org/repos/asf/incubator-impala/commit/4303a448 Tree: http://git-wip-us.apache.org/repos/asf/incubator-impala/tree/4303a448 Diff: http://git-wip-us.apache.org/repos/asf/incubator-impala/diff/4303a448 Branch: refs/heads/doc_prototype Commit: 4303a448a352cc58cf52eeca6cd7fff817e2b7c5 Parents: df2755d Author: John Russell <[email protected]> Authored: Mon Oct 31 15:28:46 2016 -0700 Committer: John Russell <[email protected]> Committed: Mon Oct 31 15:28:46 2016 -0700 ---------------------------------------------------------------------- docs/shared/impala_common.xml | 9 +++++---- docs/topics/impala_development.xml | 10 ++++++---- 2 files changed, 11 insertions(+), 8 deletions(-) ---------------------------------------------------------------------- http://git-wip-us.apache.org/repos/asf/incubator-impala/blob/4303a448/docs/shared/impala_common.xml ---------------------------------------------------------------------- diff --git a/docs/shared/impala_common.xml b/docs/shared/impala_common.xml index f281318..cdde360 100644 --- a/docs/shared/impala_common.xml +++ b/docs/shared/impala_common.xml @@ -2564,15 +2564,16 @@ select * from header_line limit 10; <li> Most common SQL-92 features of Hive Query Language (HiveQL) including <xref href="../topics/impala_select.xml#select">SELECT</xref>, - <xref href="../topics/impala_joins.xml#joins">joins</xref>, and aggregate functions. + <xref href="../topics/impala_joins.xml#joins">joins</xref>, and + <xref href="../topics/impala_aggregate_functions.xml#aggregate_functions">aggregate functions</xref>. </li> <li> HDFS, HBase, <ph rev="2.2.0">and Amazon Simple Storage System (S3)</ph> storage, including: <ul> <li> - <xref href="../topics/impala_file_formats.xml#file_formats">HDFS file formats</xref>: Text file, - SequenceFile, RCFile, Avro file, and Parquet. + <xref href="../topics/impala_file_formats.xml#file_formats">HDFS file formats</xref>: delimited text files, Parquet, + Avro, SequenceFile, and RCFile. </li> <li> @@ -2599,7 +2600,7 @@ select * from header_line limit 10; </li> <li> - Impala <xref href="../topics/impala_impala_shell.xml#impala_shell">command-line interface</xref>. + <xref href="../topics/impala_impala_shell.xml#impala_shell">impala-shell command-line interface</xref>. </li> <li> http://git-wip-us.apache.org/repos/asf/incubator-impala/blob/4303a448/docs/topics/impala_development.xml ---------------------------------------------------------------------- diff --git a/docs/topics/impala_development.xml b/docs/topics/impala_development.xml index a2eef16..1b35046 100644 --- a/docs/topics/impala_development.xml +++ b/docs/topics/impala_development.xml @@ -54,7 +54,7 @@ <ul> <li> <p> - The <codeph>SELECT</codeph> statement includes familiar clauses such as <codeph>WHERE</codeph>, + The <xref href="impala_select.xml#select">SELECT statement</xref> includes familiar clauses such as <codeph>WHERE</codeph>, <codeph>GROUP BY</codeph>, <codeph>ORDER BY</codeph>, and <codeph>WITH</codeph>. You will find familiar notions such as <xref href="impala_joins.xml#joins">joins</xref>, <xref href="impala_functions.xml#builtins">built-in @@ -109,8 +109,10 @@ All data creation is done by <codeph>INSERT</codeph> statements, which typically insert data in bulk by querying from other tables. There are two variations, <codeph>INSERT INTO</codeph> which appends to the existing data, and <codeph>INSERT OVERWRITE</codeph> which replaces the entire contents of a table or - partition (similar to <codeph>TRUNCATE TABLE</codeph> followed by a new <codeph>INSERT</codeph>). There - is no <codeph>INSERT ... VALUES</codeph> syntax to insert a single row. + partition (similar to <codeph>TRUNCATE TABLE</codeph> followed by a new <codeph>INSERT</codeph>). + Although there is an <codeph>INSERT ... VALUES</codeph> syntax to create a small number of values in + a single statement, it is far more efficient to use the <codeph>INSERT ... SELECT</codeph> to copy + and transform large amounts of data from one table to another in a single operation. </p> </li> @@ -137,7 +139,7 @@ <li> <p> Because Impala reads large quantities of data that might not be perfectly tidy and predictable, it does - not impose length constraints on string data types. For example, you can define a database column as + not require length constraints on string data types. For example, you can define a database column as <codeph>STRING</codeph> with unlimited length, rather than <codeph>CHAR(1)</codeph> or <codeph>VARCHAR(64)</codeph>. <ph rev="2.0.0">(Although in Impala 2.0 and later, you can also use length-constrained <codeph>CHAR</codeph> and <codeph>VARCHAR</codeph> types.)</ph>
